* [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/
@ 2009-09-02 3:41 Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 1/4] page-types: move from " Wu Fengguang
` (3 more replies)
0 siblings, 4 replies; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 3:41 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Christoph Lameter, Wu, Fengguang, KOSAKI Motohiro,
Randy Dunlap, Chris Wright, Huang, Ying, Lin Ming, Josh Triplett,
Andi Kleen, Nick Piggin, linux-mm
Hi all,
3 useful tools (which are more than code examples) in Documentation/vm/
- page-types
- slabinfo
- slqbinfo
are moved to tools/vm/, and page-types is updated to support two new flags.
The tools can be compiled together by
make tools/vm/
Note that checkpatch complains some style problems on slabinfo.c/slqbinfo.c,
which are leaved as is.
Thanks,
Fengguang
--
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [RFC][PATCH 1/4] page-types: move from Documentation/vm/ to tools/vm/
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
@ 2009-09-02 3:41 ` Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 2/4] slabinfo: " Wu Fengguang
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 3:41 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Andi Kleen, Josh Triplett, KOSAKI Motohiro, Wu Fengguang,
Christoph Lameter, Randy Dunlap, Chris Wright, Huang, Ying,
Lin Ming, Nick Piggin, linux-mm
[-- Attachment #1: mm-move-page-types.patch --]
[-- Type: text/plain, Size: 33591 bytes --]
CC: Andi Kleen <andi@firstfloor.org>
CC: Josh Triplett <josh@joshtriplett.org>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Documentation/vm/.gitignore | 1
Documentation/vm/Makefile | 2
Documentation/vm/page-types.c | 698 --------------------------------
Documentation/vm/pagemap.txt | 4
tools/vm/.gitignore | 1
tools/vm/Makefile | 5
tools/vm/page-types.c | 698 ++++++++++++++++++++++++++++++++
7 files changed, 708 insertions(+), 701 deletions(-)
--- linux-mm.orig/Documentation/vm/page-types.c 2009-08-31 14:00:34.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,698 +0,0 @@
-/*
- * page-types: Tool for querying page flags
- *
- * Copyright (C) 2009 Intel corporation
- * Copyright (C) 2009 Wu Fengguang <fengguang.wu@intel.com>
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <stdarg.h>
-#include <string.h>
-#include <getopt.h>
-#include <limits.h>
-#include <sys/types.h>
-#include <sys/errno.h>
-#include <sys/fcntl.h>
-
-
-/*
- * kernel page flags
- */
-
-#define KPF_BYTES 8
-#define PROC_KPAGEFLAGS "/proc/kpageflags"
-
-/* copied from kpageflags_read() */
-#define KPF_LOCKED 0
-#define KPF_ERROR 1
-#define KPF_REFERENCED 2
-#define KPF_UPTODATE 3
-#define KPF_DIRTY 4
-#define KPF_LRU 5
-#define KPF_ACTIVE 6
-#define KPF_SLAB 7
-#define KPF_WRITEBACK 8
-#define KPF_RECLAIM 9
-#define KPF_BUDDY 10
-
-/* [11-20] new additions in 2.6.31 */
-#define KPF_MMAP 11
-#define KPF_ANON 12
-#define KPF_SWAPCACHE 13
-#define KPF_SWAPBACKED 14
-#define KPF_COMPOUND_HEAD 15
-#define KPF_COMPOUND_TAIL 16
-#define KPF_HUGE 17
-#define KPF_UNEVICTABLE 18
-#define KPF_NOPAGE 20
-
-/* [32-] kernel hacking assistances */
-#define KPF_RESERVED 32
-#define KPF_MLOCKED 33
-#define KPF_MAPPEDTODISK 34
-#define KPF_PRIVATE 35
-#define KPF_PRIVATE_2 36
-#define KPF_OWNER_PRIVATE 37
-#define KPF_ARCH 38
-#define KPF_UNCACHED 39
-
-/* [48-] take some arbitrary free slots for expanding overloaded flags
- * not part of kernel API
- */
-#define KPF_READAHEAD 48
-#define KPF_SLOB_FREE 49
-#define KPF_SLUB_FROZEN 50
-#define KPF_SLUB_DEBUG 51
-
-#define KPF_ALL_BITS ((uint64_t)~0ULL)
-#define KPF_HACKERS_BITS (0xffffULL << 32)
-#define KPF_OVERLOADED_BITS (0xffffULL << 48)
-#define BIT(name) (1ULL << KPF_##name)
-#define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL))
-
-static char *page_flag_names[] = {
- [KPF_LOCKED] = "L:locked",
- [KPF_ERROR] = "E:error",
- [KPF_REFERENCED] = "R:referenced",
- [KPF_UPTODATE] = "U:uptodate",
- [KPF_DIRTY] = "D:dirty",
- [KPF_LRU] = "l:lru",
- [KPF_ACTIVE] = "A:active",
- [KPF_SLAB] = "S:slab",
- [KPF_WRITEBACK] = "W:writeback",
- [KPF_RECLAIM] = "I:reclaim",
- [KPF_BUDDY] = "B:buddy",
-
- [KPF_MMAP] = "M:mmap",
- [KPF_ANON] = "a:anonymous",
- [KPF_SWAPCACHE] = "s:swapcache",
- [KPF_SWAPBACKED] = "b:swapbacked",
- [KPF_COMPOUND_HEAD] = "H:compound_head",
- [KPF_COMPOUND_TAIL] = "T:compound_tail",
- [KPF_HUGE] = "G:huge",
- [KPF_UNEVICTABLE] = "u:unevictable",
- [KPF_NOPAGE] = "n:nopage",
-
- [KPF_RESERVED] = "r:reserved",
- [KPF_MLOCKED] = "m:mlocked",
- [KPF_MAPPEDTODISK] = "d:mappedtodisk",
- [KPF_PRIVATE] = "P:private",
- [KPF_PRIVATE_2] = "p:private_2",
- [KPF_OWNER_PRIVATE] = "O:owner_private",
- [KPF_ARCH] = "h:arch",
- [KPF_UNCACHED] = "c:uncached",
-
- [KPF_READAHEAD] = "I:readahead",
- [KPF_SLOB_FREE] = "P:slob_free",
- [KPF_SLUB_FROZEN] = "A:slub_frozen",
- [KPF_SLUB_DEBUG] = "E:slub_debug",
-};
-
-
-/*
- * data structures
- */
-
-static int opt_raw; /* for kernel developers */
-static int opt_list; /* list pages (in ranges) */
-static int opt_no_summary; /* don't show summary */
-static pid_t opt_pid; /* process to walk */
-
-#define MAX_ADDR_RANGES 1024
-static int nr_addr_ranges;
-static unsigned long opt_offset[MAX_ADDR_RANGES];
-static unsigned long opt_size[MAX_ADDR_RANGES];
-
-#define MAX_BIT_FILTERS 64
-static int nr_bit_filters;
-static uint64_t opt_mask[MAX_BIT_FILTERS];
-static uint64_t opt_bits[MAX_BIT_FILTERS];
-
-static int page_size;
-
-#define PAGES_BATCH (64 << 10) /* 64k pages */
-static int kpageflags_fd;
-static uint64_t kpageflags_buf[KPF_BYTES * PAGES_BATCH];
-
-#define HASH_SHIFT 13
-#define HASH_SIZE (1 << HASH_SHIFT)
-#define HASH_MASK (HASH_SIZE - 1)
-#define HASH_KEY(flags) (flags & HASH_MASK)
-
-static unsigned long total_pages;
-static unsigned long nr_pages[HASH_SIZE];
-static uint64_t page_flags[HASH_SIZE];
-
-
-/*
- * helper functions
- */
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
-#define min_t(type, x, y) ({ \
- type __min1 = (x); \
- type __min2 = (y); \
- __min1 < __min2 ? __min1 : __min2; })
-
-static unsigned long pages2mb(unsigned long pages)
-{
- return (pages * page_size) >> 20;
-}
-
-static void fatal(const char *x, ...)
-{
- va_list ap;
-
- va_start(ap, x);
- vfprintf(stderr, x, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-
-/*
- * page flag names
- */
-
-static char *page_flag_name(uint64_t flags)
-{
- static char buf[65];
- int present;
- int i, j;
-
- for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
- present = (flags >> i) & 1;
- if (!page_flag_names[i]) {
- if (present)
- fatal("unkown flag bit %d\n", i);
- continue;
- }
- buf[j++] = present ? page_flag_names[i][0] : '_';
- }
-
- return buf;
-}
-
-static char *page_flag_longname(uint64_t flags)
-{
- static char buf[1024];
- int i, n;
-
- for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) {
- if (!page_flag_names[i])
- continue;
- if ((flags >> i) & 1)
- n += snprintf(buf + n, sizeof(buf) - n, "%s,",
- page_flag_names[i] + 2);
- }
- if (n)
- n--;
- buf[n] = '\0';
-
- return buf;
-}
-
-
-/*
- * page list and summary
- */
-
-static void show_page_range(unsigned long offset, uint64_t flags)
-{
- static uint64_t flags0;
- static unsigned long index;
- static unsigned long count;
-
- if (flags == flags0 && offset == index + count) {
- count++;
- return;
- }
-
- if (count)
- printf("%lu\t%lu\t%s\n",
- index, count, page_flag_name(flags0));
-
- flags0 = flags;
- index = offset;
- count = 1;
-}
-
-static void show_page(unsigned long offset, uint64_t flags)
-{
- printf("%lu\t%s\n", offset, page_flag_name(flags));
-}
-
-static void show_summary(void)
-{
- int i;
-
- printf(" flags\tpage-count MB"
- " symbolic-flags\t\t\tlong-symbolic-flags\n");
-
- for (i = 0; i < ARRAY_SIZE(nr_pages); i++) {
- if (nr_pages[i])
- printf("0x%016llx\t%10lu %8lu %s\t%s\n",
- (unsigned long long)page_flags[i],
- nr_pages[i],
- pages2mb(nr_pages[i]),
- page_flag_name(page_flags[i]),
- page_flag_longname(page_flags[i]));
- }
-
- printf(" total\t%10lu %8lu\n",
- total_pages, pages2mb(total_pages));
-}
-
-
-/*
- * page flag filters
- */
-
-static int bit_mask_ok(uint64_t flags)
-{
- int i;
-
- for (i = 0; i < nr_bit_filters; i++) {
- if (opt_bits[i] == KPF_ALL_BITS) {
- if ((flags & opt_mask[i]) == 0)
- return 0;
- } else {
- if ((flags & opt_mask[i]) != opt_bits[i])
- return 0;
- }
- }
-
- return 1;
-}
-
-static uint64_t expand_overloaded_flags(uint64_t flags)
-{
- /* SLOB/SLUB overload several page flags */
- if (flags & BIT(SLAB)) {
- if (flags & BIT(PRIVATE))
- flags ^= BIT(PRIVATE) | BIT(SLOB_FREE);
- if (flags & BIT(ACTIVE))
- flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN);
- if (flags & BIT(ERROR))
- flags ^= BIT(ERROR) | BIT(SLUB_DEBUG);
- }
-
- /* PG_reclaim is overloaded as PG_readahead in the read path */
- if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM))
- flags ^= BIT(RECLAIM) | BIT(READAHEAD);
-
- return flags;
-}
-
-static uint64_t well_known_flags(uint64_t flags)
-{
- /* hide flags intended only for kernel hacker */
- flags &= ~KPF_HACKERS_BITS;
-
- /* hide non-hugeTLB compound pages */
- if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE)))
- flags &= ~BITS_COMPOUND;
-
- return flags;
-}
-
-
-/*
- * page frame walker
- */
-
-static int hash_slot(uint64_t flags)
-{
- int k = HASH_KEY(flags);
- int i;
-
- /* Explicitly reserve slot 0 for flags 0: the following logic
- * cannot distinguish an unoccupied slot from slot (flags==0).
- */
- if (flags == 0)
- return 0;
-
- /* search through the remaining (HASH_SIZE-1) slots */
- for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) {
- if (!k || k >= ARRAY_SIZE(page_flags))
- k = 1;
- if (page_flags[k] == 0) {
- page_flags[k] = flags;
- return k;
- }
- if (page_flags[k] == flags)
- return k;
- }
-
- fatal("hash table full: bump up HASH_SHIFT?\n");
- exit(EXIT_FAILURE);
-}
-
-static void add_page(unsigned long offset, uint64_t flags)
-{
- flags = expand_overloaded_flags(flags);
-
- if (!opt_raw)
- flags = well_known_flags(flags);
-
- if (!bit_mask_ok(flags))
- return;
-
- if (opt_list == 1)
- show_page_range(offset, flags);
- else if (opt_list == 2)
- show_page(offset, flags);
-
- nr_pages[hash_slot(flags)]++;
- total_pages++;
-}
-
-static void walk_pfn(unsigned long index, unsigned long count)
-{
- unsigned long batch;
- unsigned long n;
- unsigned long i;
-
- if (index > ULONG_MAX / KPF_BYTES)
- fatal("index overflow: %lu\n", index);
-
- lseek(kpageflags_fd, index * KPF_BYTES, SEEK_SET);
-
- while (count) {
- batch = min_t(unsigned long, count, PAGES_BATCH);
- n = read(kpageflags_fd, kpageflags_buf, batch * KPF_BYTES);
- if (n == 0)
- break;
- if (n < 0) {
- perror(PROC_KPAGEFLAGS);
- exit(EXIT_FAILURE);
- }
-
- if (n % KPF_BYTES != 0)
- fatal("partial read: %lu bytes\n", n);
- n = n / KPF_BYTES;
-
- for (i = 0; i < n; i++)
- add_page(index + i, kpageflags_buf[i]);
-
- index += batch;
- count -= batch;
- }
-}
-
-static void walk_addr_ranges(void)
-{
- int i;
-
- kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY);
- if (kpageflags_fd < 0) {
- perror(PROC_KPAGEFLAGS);
- exit(EXIT_FAILURE);
- }
-
- if (!nr_addr_ranges)
- walk_pfn(0, ULONG_MAX);
-
- for (i = 0; i < nr_addr_ranges; i++)
- walk_pfn(opt_offset[i], opt_size[i]);
-
- close(kpageflags_fd);
-}
-
-
-/*
- * user interface
- */
-
-static const char *page_flag_type(uint64_t flag)
-{
- if (flag & KPF_HACKERS_BITS)
- return "(r)";
- if (flag & KPF_OVERLOADED_BITS)
- return "(o)";
- return " ";
-}
-
-static void usage(void)
-{
- int i, j;
-
- printf(
-"page-types [options]\n"
-" -r|--raw Raw mode, for kernel developers\n"
-" -a|--addr addr-spec Walk a range of pages\n"
-" -b|--bits bits-spec Walk pages with specified bits\n"
-#if 0 /* planned features */
-" -p|--pid pid Walk process address space\n"
-" -f|--file filename Walk file address space\n"
-#endif
-" -l|--list Show page details in ranges\n"
-" -L|--list-each Show page details one by one\n"
-" -N|--no-summary Don't show summay info\n"
-" -h|--help Show this usage message\n"
-"addr-spec:\n"
-" N one page at offset N (unit: pages)\n"
-" N+M pages range from N to N+M-1\n"
-" N,M pages range from N to M-1\n"
-" N, pages range from N to end\n"
-" ,M pages range from 0 to M\n"
-"bits-spec:\n"
-" bit1,bit2 (flags & (bit1|bit2)) != 0\n"
-" bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n"
-" bit1,~bit2 (flags & (bit1|bit2)) == bit1\n"
-" =bit1,bit2 flags == (bit1|bit2)\n"
-"bit-names:\n"
- );
-
- for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
- if (!page_flag_names[i])
- continue;
- printf("%16s%s", page_flag_names[i] + 2,
- page_flag_type(1ULL << i));
- if (++j > 3) {
- j = 0;
- putchar('\n');
- }
- }
- printf("\n "
- "(r) raw mode bits (o) overloaded bits\n");
-}
-
-static unsigned long long parse_number(const char *str)
-{
- unsigned long long n;
-
- n = strtoll(str, NULL, 0);
-
- if (n == 0 && str[0] != '0')
- fatal("invalid name or number: %s\n", str);
-
- return n;
-}
-
-static void parse_pid(const char *str)
-{
- opt_pid = parse_number(str);
-}
-
-static void parse_file(const char *name)
-{
-}
-
-static void add_addr_range(unsigned long offset, unsigned long size)
-{
- if (nr_addr_ranges >= MAX_ADDR_RANGES)
- fatal("too much addr ranges\n");
-
- opt_offset[nr_addr_ranges] = offset;
- opt_size[nr_addr_ranges] = size;
- nr_addr_ranges++;
-}
-
-static void parse_addr_range(const char *optarg)
-{
- unsigned long offset;
- unsigned long size;
- char *p;
-
- p = strchr(optarg, ',');
- if (!p)
- p = strchr(optarg, '+');
-
- if (p == optarg) {
- offset = 0;
- size = parse_number(p + 1);
- } else if (p) {
- offset = parse_number(optarg);
- if (p[1] == '\0')
- size = ULONG_MAX;
- else {
- size = parse_number(p + 1);
- if (*p == ',') {
- if (size < offset)
- fatal("invalid range: %lu,%lu\n",
- offset, size);
- size -= offset;
- }
- }
- } else {
- offset = parse_number(optarg);
- size = 1;
- }
-
- add_addr_range(offset, size);
-}
-
-static void add_bits_filter(uint64_t mask, uint64_t bits)
-{
- if (nr_bit_filters >= MAX_BIT_FILTERS)
- fatal("too much bit filters\n");
-
- opt_mask[nr_bit_filters] = mask;
- opt_bits[nr_bit_filters] = bits;
- nr_bit_filters++;
-}
-
-static uint64_t parse_flag_name(const char *str, int len)
-{
- int i;
-
- if (!*str || !len)
- return 0;
-
- if (len <= 8 && !strncmp(str, "compound", len))
- return BITS_COMPOUND;
-
- for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) {
- if (!page_flag_names[i])
- continue;
- if (!strncmp(str, page_flag_names[i] + 2, len))
- return 1ULL << i;
- }
-
- return parse_number(str);
-}
-
-static uint64_t parse_flag_names(const char *str, int all)
-{
- const char *p = str;
- uint64_t flags = 0;
-
- while (1) {
- if (*p == ',' || *p == '=' || *p == '\0') {
- if ((*str != '~') || (*str == '~' && all && *++str))
- flags |= parse_flag_name(str, p - str);
- if (*p != ',')
- break;
- str = p + 1;
- }
- p++;
- }
-
- return flags;
-}
-
-static void parse_bits_mask(const char *optarg)
-{
- uint64_t mask;
- uint64_t bits;
- const char *p;
-
- p = strchr(optarg, '=');
- if (p == optarg) {
- mask = KPF_ALL_BITS;
- bits = parse_flag_names(p + 1, 0);
- } else if (p) {
- mask = parse_flag_names(optarg, 0);
- bits = parse_flag_names(p + 1, 0);
- } else if (strchr(optarg, '~')) {
- mask = parse_flag_names(optarg, 1);
- bits = parse_flag_names(optarg, 0);
- } else {
- mask = parse_flag_names(optarg, 0);
- bits = KPF_ALL_BITS;
- }
-
- add_bits_filter(mask, bits);
-}
-
-
-static struct option opts[] = {
- { "raw" , 0, NULL, 'r' },
- { "pid" , 1, NULL, 'p' },
- { "file" , 1, NULL, 'f' },
- { "addr" , 1, NULL, 'a' },
- { "bits" , 1, NULL, 'b' },
- { "list" , 0, NULL, 'l' },
- { "list-each" , 0, NULL, 'L' },
- { "no-summary", 0, NULL, 'N' },
- { "help" , 0, NULL, 'h' },
- { NULL , 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- int c;
-
- page_size = getpagesize();
-
- while ((c = getopt_long(argc, argv,
- "rp:f:a:b:lLNh", opts, NULL)) != -1) {
- switch (c) {
- case 'r':
- opt_raw = 1;
- break;
- case 'p':
- parse_pid(optarg);
- break;
- case 'f':
- parse_file(optarg);
- break;
- case 'a':
- parse_addr_range(optarg);
- break;
- case 'b':
- parse_bits_mask(optarg);
- break;
- case 'l':
- opt_list = 1;
- break;
- case 'L':
- opt_list = 2;
- break;
- case 'N':
- opt_no_summary = 1;
- break;
- case 'h':
- usage();
- exit(0);
- default:
- usage();
- exit(1);
- }
- }
-
- if (opt_list == 1)
- printf("offset\tcount\tflags\n");
- if (opt_list == 2)
- printf("offset\tflags\n");
-
- walk_addr_ranges();
-
- if (opt_list == 1)
- show_page_range(0, 0); /* drain the buffer */
-
- if (opt_no_summary)
- return 0;
-
- if (opt_list)
- printf("\n\n");
-
- show_summary();
-
- return 0;
-}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/page-types.c 2009-09-02 11:09:39.000000000 +0800
@@ -0,0 +1,698 @@
+/*
+ * page-types: Tool for querying page flags
+ *
+ * Copyright (C) 2009 Intel corporation
+ * Copyright (C) 2009 Wu Fengguang <fengguang.wu@intel.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <getopt.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/fcntl.h>
+
+
+/*
+ * kernel page flags
+ */
+
+#define KPF_BYTES 8
+#define PROC_KPAGEFLAGS "/proc/kpageflags"
+
+/* copied from kpageflags_read() */
+#define KPF_LOCKED 0
+#define KPF_ERROR 1
+#define KPF_REFERENCED 2
+#define KPF_UPTODATE 3
+#define KPF_DIRTY 4
+#define KPF_LRU 5
+#define KPF_ACTIVE 6
+#define KPF_SLAB 7
+#define KPF_WRITEBACK 8
+#define KPF_RECLAIM 9
+#define KPF_BUDDY 10
+
+/* [11-20] new additions in 2.6.31 */
+#define KPF_MMAP 11
+#define KPF_ANON 12
+#define KPF_SWAPCACHE 13
+#define KPF_SWAPBACKED 14
+#define KPF_COMPOUND_HEAD 15
+#define KPF_COMPOUND_TAIL 16
+#define KPF_HUGE 17
+#define KPF_UNEVICTABLE 18
+#define KPF_NOPAGE 20
+
+/* [32-] kernel hacking assistances */
+#define KPF_RESERVED 32
+#define KPF_MLOCKED 33
+#define KPF_MAPPEDTODISK 34
+#define KPF_PRIVATE 35
+#define KPF_PRIVATE_2 36
+#define KPF_OWNER_PRIVATE 37
+#define KPF_ARCH 38
+#define KPF_UNCACHED 39
+
+/* [48-] take some arbitrary free slots for expanding overloaded flags
+ * not part of kernel API
+ */
+#define KPF_READAHEAD 48
+#define KPF_SLOB_FREE 49
+#define KPF_SLUB_FROZEN 50
+#define KPF_SLUB_DEBUG 51
+
+#define KPF_ALL_BITS ((uint64_t)~0ULL)
+#define KPF_HACKERS_BITS (0xffffULL << 32)
+#define KPF_OVERLOADED_BITS (0xffffULL << 48)
+#define BIT(name) (1ULL << KPF_##name)
+#define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL))
+
+static char *page_flag_names[] = {
+ [KPF_LOCKED] = "L:locked",
+ [KPF_ERROR] = "E:error",
+ [KPF_REFERENCED] = "R:referenced",
+ [KPF_UPTODATE] = "U:uptodate",
+ [KPF_DIRTY] = "D:dirty",
+ [KPF_LRU] = "l:lru",
+ [KPF_ACTIVE] = "A:active",
+ [KPF_SLAB] = "S:slab",
+ [KPF_WRITEBACK] = "W:writeback",
+ [KPF_RECLAIM] = "I:reclaim",
+ [KPF_BUDDY] = "B:buddy",
+
+ [KPF_MMAP] = "M:mmap",
+ [KPF_ANON] = "a:anonymous",
+ [KPF_SWAPCACHE] = "s:swapcache",
+ [KPF_SWAPBACKED] = "b:swapbacked",
+ [KPF_COMPOUND_HEAD] = "H:compound_head",
+ [KPF_COMPOUND_TAIL] = "T:compound_tail",
+ [KPF_HUGE] = "G:huge",
+ [KPF_UNEVICTABLE] = "u:unevictable",
+ [KPF_NOPAGE] = "n:nopage",
+
+ [KPF_RESERVED] = "r:reserved",
+ [KPF_MLOCKED] = "m:mlocked",
+ [KPF_MAPPEDTODISK] = "d:mappedtodisk",
+ [KPF_PRIVATE] = "P:private",
+ [KPF_PRIVATE_2] = "p:private_2",
+ [KPF_OWNER_PRIVATE] = "O:owner_private",
+ [KPF_ARCH] = "h:arch",
+ [KPF_UNCACHED] = "c:uncached",
+
+ [KPF_READAHEAD] = "I:readahead",
+ [KPF_SLOB_FREE] = "P:slob_free",
+ [KPF_SLUB_FROZEN] = "A:slub_frozen",
+ [KPF_SLUB_DEBUG] = "E:slub_debug",
+};
+
+
+/*
+ * data structures
+ */
+
+static int opt_raw; /* for kernel developers */
+static int opt_list; /* list pages (in ranges) */
+static int opt_no_summary; /* don't show summary */
+static pid_t opt_pid; /* process to walk */
+
+#define MAX_ADDR_RANGES 1024
+static int nr_addr_ranges;
+static unsigned long opt_offset[MAX_ADDR_RANGES];
+static unsigned long opt_size[MAX_ADDR_RANGES];
+
+#define MAX_BIT_FILTERS 64
+static int nr_bit_filters;
+static uint64_t opt_mask[MAX_BIT_FILTERS];
+static uint64_t opt_bits[MAX_BIT_FILTERS];
+
+static int page_size;
+
+#define PAGES_BATCH (64 << 10) /* 64k pages */
+static int kpageflags_fd;
+static uint64_t kpageflags_buf[KPF_BYTES * PAGES_BATCH];
+
+#define HASH_SHIFT 13
+#define HASH_SIZE (1 << HASH_SHIFT)
+#define HASH_MASK (HASH_SIZE - 1)
+#define HASH_KEY(flags) (flags & HASH_MASK)
+
+static unsigned long total_pages;
+static unsigned long nr_pages[HASH_SIZE];
+static uint64_t page_flags[HASH_SIZE];
+
+
+/*
+ * helper functions
+ */
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+#define min_t(type, x, y) ({ \
+ type __min1 = (x); \
+ type __min2 = (y); \
+ __min1 < __min2 ? __min1 : __min2; })
+
+static unsigned long pages2mb(unsigned long pages)
+{
+ return (pages * page_size) >> 20;
+}
+
+static void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+
+/*
+ * page flag names
+ */
+
+static char *page_flag_name(uint64_t flags)
+{
+ static char buf[65];
+ int present;
+ int i, j;
+
+ for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+ present = (flags >> i) & 1;
+ if (!page_flag_names[i]) {
+ if (present)
+ fatal("unkown flag bit %d\n", i);
+ continue;
+ }
+ buf[j++] = present ? page_flag_names[i][0] : '_';
+ }
+
+ return buf;
+}
+
+static char *page_flag_longname(uint64_t flags)
+{
+ static char buf[1024];
+ int i, n;
+
+ for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+ if (!page_flag_names[i])
+ continue;
+ if ((flags >> i) & 1)
+ n += snprintf(buf + n, sizeof(buf) - n, "%s,",
+ page_flag_names[i] + 2);
+ }
+ if (n)
+ n--;
+ buf[n] = '\0';
+
+ return buf;
+}
+
+
+/*
+ * page list and summary
+ */
+
+static void show_page_range(unsigned long offset, uint64_t flags)
+{
+ static uint64_t flags0;
+ static unsigned long index;
+ static unsigned long count;
+
+ if (flags == flags0 && offset == index + count) {
+ count++;
+ return;
+ }
+
+ if (count)
+ printf("%lu\t%lu\t%s\n",
+ index, count, page_flag_name(flags0));
+
+ flags0 = flags;
+ index = offset;
+ count = 1;
+}
+
+static void show_page(unsigned long offset, uint64_t flags)
+{
+ printf("%lu\t%s\n", offset, page_flag_name(flags));
+}
+
+static void show_summary(void)
+{
+ int i;
+
+ printf(" flags\tpage-count MB"
+ " symbolic-flags\t\t\tlong-symbolic-flags\n");
+
+ for (i = 0; i < ARRAY_SIZE(nr_pages); i++) {
+ if (nr_pages[i])
+ printf("0x%016llx\t%10lu %8lu %s\t%s\n",
+ (unsigned long long)page_flags[i],
+ nr_pages[i],
+ pages2mb(nr_pages[i]),
+ page_flag_name(page_flags[i]),
+ page_flag_longname(page_flags[i]));
+ }
+
+ printf(" total\t%10lu %8lu\n",
+ total_pages, pages2mb(total_pages));
+}
+
+
+/*
+ * page flag filters
+ */
+
+static int bit_mask_ok(uint64_t flags)
+{
+ int i;
+
+ for (i = 0; i < nr_bit_filters; i++) {
+ if (opt_bits[i] == KPF_ALL_BITS) {
+ if ((flags & opt_mask[i]) == 0)
+ return 0;
+ } else {
+ if ((flags & opt_mask[i]) != opt_bits[i])
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static uint64_t expand_overloaded_flags(uint64_t flags)
+{
+ /* SLOB/SLUB overload several page flags */
+ if (flags & BIT(SLAB)) {
+ if (flags & BIT(PRIVATE))
+ flags ^= BIT(PRIVATE) | BIT(SLOB_FREE);
+ if (flags & BIT(ACTIVE))
+ flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN);
+ if (flags & BIT(ERROR))
+ flags ^= BIT(ERROR) | BIT(SLUB_DEBUG);
+ }
+
+ /* PG_reclaim is overloaded as PG_readahead in the read path */
+ if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM))
+ flags ^= BIT(RECLAIM) | BIT(READAHEAD);
+
+ return flags;
+}
+
+static uint64_t well_known_flags(uint64_t flags)
+{
+ /* hide flags intended only for kernel hacker */
+ flags &= ~KPF_HACKERS_BITS;
+
+ /* hide non-hugeTLB compound pages */
+ if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE)))
+ flags &= ~BITS_COMPOUND;
+
+ return flags;
+}
+
+
+/*
+ * page frame walker
+ */
+
+static int hash_slot(uint64_t flags)
+{
+ int k = HASH_KEY(flags);
+ int i;
+
+ /* Explicitly reserve slot 0 for flags 0: the following logic
+ * cannot distinguish an unoccupied slot from slot (flags==0).
+ */
+ if (flags == 0)
+ return 0;
+
+ /* search through the remaining (HASH_SIZE-1) slots */
+ for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) {
+ if (!k || k >= ARRAY_SIZE(page_flags))
+ k = 1;
+ if (page_flags[k] == 0) {
+ page_flags[k] = flags;
+ return k;
+ }
+ if (page_flags[k] == flags)
+ return k;
+ }
+
+ fatal("hash table full: bump up HASH_SHIFT?\n");
+ exit(EXIT_FAILURE);
+}
+
+static void add_page(unsigned long offset, uint64_t flags)
+{
+ flags = expand_overloaded_flags(flags);
+
+ if (!opt_raw)
+ flags = well_known_flags(flags);
+
+ if (!bit_mask_ok(flags))
+ return;
+
+ if (opt_list == 1)
+ show_page_range(offset, flags);
+ else if (opt_list == 2)
+ show_page(offset, flags);
+
+ nr_pages[hash_slot(flags)]++;
+ total_pages++;
+}
+
+static void walk_pfn(unsigned long index, unsigned long count)
+{
+ unsigned long batch;
+ unsigned long n;
+ unsigned long i;
+
+ if (index > ULONG_MAX / KPF_BYTES)
+ fatal("index overflow: %lu\n", index);
+
+ lseek(kpageflags_fd, index * KPF_BYTES, SEEK_SET);
+
+ while (count) {
+ batch = min_t(unsigned long, count, PAGES_BATCH);
+ n = read(kpageflags_fd, kpageflags_buf, batch * KPF_BYTES);
+ if (n == 0)
+ break;
+ if (n < 0) {
+ perror(PROC_KPAGEFLAGS);
+ exit(EXIT_FAILURE);
+ }
+
+ if (n % KPF_BYTES != 0)
+ fatal("partial read: %lu bytes\n", n);
+ n = n / KPF_BYTES;
+
+ for (i = 0; i < n; i++)
+ add_page(index + i, kpageflags_buf[i]);
+
+ index += batch;
+ count -= batch;
+ }
+}
+
+static void walk_addr_ranges(void)
+{
+ int i;
+
+ kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY);
+ if (kpageflags_fd < 0) {
+ perror(PROC_KPAGEFLAGS);
+ exit(EXIT_FAILURE);
+ }
+
+ if (!nr_addr_ranges)
+ walk_pfn(0, ULONG_MAX);
+
+ for (i = 0; i < nr_addr_ranges; i++)
+ walk_pfn(opt_offset[i], opt_size[i]);
+
+ close(kpageflags_fd);
+}
+
+
+/*
+ * user interface
+ */
+
+static const char *page_flag_type(uint64_t flag)
+{
+ if (flag & KPF_HACKERS_BITS)
+ return "(r)";
+ if (flag & KPF_OVERLOADED_BITS)
+ return "(o)";
+ return " ";
+}
+
+static void usage(void)
+{
+ int i, j;
+
+ printf(
+"page-types [options]\n"
+" -r|--raw Raw mode, for kernel developers\n"
+" -a|--addr addr-spec Walk a range of pages\n"
+" -b|--bits bits-spec Walk pages with specified bits\n"
+#if 0 /* planned features */
+" -p|--pid pid Walk process address space\n"
+" -f|--file filename Walk file address space\n"
+#endif
+" -l|--list Show page details in ranges\n"
+" -L|--list-each Show page details one by one\n"
+" -N|--no-summary Don't show summay info\n"
+" -h|--help Show this usage message\n"
+"addr-spec:\n"
+" N one page at offset N (unit: pages)\n"
+" N+M pages range from N to N+M-1\n"
+" N,M pages range from N to M-1\n"
+" N, pages range from N to end\n"
+" ,M pages range from 0 to M\n"
+"bits-spec:\n"
+" bit1,bit2 (flags & (bit1|bit2)) != 0\n"
+" bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n"
+" bit1,~bit2 (flags & (bit1|bit2)) == bit1\n"
+" =bit1,bit2 flags == (bit1|bit2)\n"
+"bit-names:\n"
+ );
+
+ for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+ if (!page_flag_names[i])
+ continue;
+ printf("%16s%s", page_flag_names[i] + 2,
+ page_flag_type(1ULL << i));
+ if (++j > 3) {
+ j = 0;
+ putchar('\n');
+ }
+ }
+ printf("\n "
+ "(r) raw mode bits (o) overloaded bits\n");
+}
+
+static unsigned long long parse_number(const char *str)
+{
+ unsigned long long n;
+
+ n = strtoll(str, NULL, 0);
+
+ if (n == 0 && str[0] != '0')
+ fatal("invalid name or number: %s\n", str);
+
+ return n;
+}
+
+static void parse_pid(const char *str)
+{
+ opt_pid = parse_number(str);
+}
+
+static void parse_file(const char *name)
+{
+}
+
+static void add_addr_range(unsigned long offset, unsigned long size)
+{
+ if (nr_addr_ranges >= MAX_ADDR_RANGES)
+ fatal("too much addr ranges\n");
+
+ opt_offset[nr_addr_ranges] = offset;
+ opt_size[nr_addr_ranges] = size;
+ nr_addr_ranges++;
+}
+
+static void parse_addr_range(const char *optarg)
+{
+ unsigned long offset;
+ unsigned long size;
+ char *p;
+
+ p = strchr(optarg, ',');
+ if (!p)
+ p = strchr(optarg, '+');
+
+ if (p == optarg) {
+ offset = 0;
+ size = parse_number(p + 1);
+ } else if (p) {
+ offset = parse_number(optarg);
+ if (p[1] == '\0')
+ size = ULONG_MAX;
+ else {
+ size = parse_number(p + 1);
+ if (*p == ',') {
+ if (size < offset)
+ fatal("invalid range: %lu,%lu\n",
+ offset, size);
+ size -= offset;
+ }
+ }
+ } else {
+ offset = parse_number(optarg);
+ size = 1;
+ }
+
+ add_addr_range(offset, size);
+}
+
+static void add_bits_filter(uint64_t mask, uint64_t bits)
+{
+ if (nr_bit_filters >= MAX_BIT_FILTERS)
+ fatal("too much bit filters\n");
+
+ opt_mask[nr_bit_filters] = mask;
+ opt_bits[nr_bit_filters] = bits;
+ nr_bit_filters++;
+}
+
+static uint64_t parse_flag_name(const char *str, int len)
+{
+ int i;
+
+ if (!*str || !len)
+ return 0;
+
+ if (len <= 8 && !strncmp(str, "compound", len))
+ return BITS_COMPOUND;
+
+ for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+ if (!page_flag_names[i])
+ continue;
+ if (!strncmp(str, page_flag_names[i] + 2, len))
+ return 1ULL << i;
+ }
+
+ return parse_number(str);
+}
+
+static uint64_t parse_flag_names(const char *str, int all)
+{
+ const char *p = str;
+ uint64_t flags = 0;
+
+ while (1) {
+ if (*p == ',' || *p == '=' || *p == '\0') {
+ if ((*str != '~') || (*str == '~' && all && *++str))
+ flags |= parse_flag_name(str, p - str);
+ if (*p != ',')
+ break;
+ str = p + 1;
+ }
+ p++;
+ }
+
+ return flags;
+}
+
+static void parse_bits_mask(const char *optarg)
+{
+ uint64_t mask;
+ uint64_t bits;
+ const char *p;
+
+ p = strchr(optarg, '=');
+ if (p == optarg) {
+ mask = KPF_ALL_BITS;
+ bits = parse_flag_names(p + 1, 0);
+ } else if (p) {
+ mask = parse_flag_names(optarg, 0);
+ bits = parse_flag_names(p + 1, 0);
+ } else if (strchr(optarg, '~')) {
+ mask = parse_flag_names(optarg, 1);
+ bits = parse_flag_names(optarg, 0);
+ } else {
+ mask = parse_flag_names(optarg, 0);
+ bits = KPF_ALL_BITS;
+ }
+
+ add_bits_filter(mask, bits);
+}
+
+
+static struct option opts[] = {
+ { "raw" , 0, NULL, 'r' },
+ { "pid" , 1, NULL, 'p' },
+ { "file" , 1, NULL, 'f' },
+ { "addr" , 1, NULL, 'a' },
+ { "bits" , 1, NULL, 'b' },
+ { "list" , 0, NULL, 'l' },
+ { "list-each" , 0, NULL, 'L' },
+ { "no-summary", 0, NULL, 'N' },
+ { "help" , 0, NULL, 'h' },
+ { NULL , 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int c;
+
+ page_size = getpagesize();
+
+ while ((c = getopt_long(argc, argv,
+ "rp:f:a:b:lLNh", opts, NULL)) != -1) {
+ switch (c) {
+ case 'r':
+ opt_raw = 1;
+ break;
+ case 'p':
+ parse_pid(optarg);
+ break;
+ case 'f':
+ parse_file(optarg);
+ break;
+ case 'a':
+ parse_addr_range(optarg);
+ break;
+ case 'b':
+ parse_bits_mask(optarg);
+ break;
+ case 'l':
+ opt_list = 1;
+ break;
+ case 'L':
+ opt_list = 2;
+ break;
+ case 'N':
+ opt_no_summary = 1;
+ break;
+ case 'h':
+ usage();
+ exit(0);
+ default:
+ usage();
+ exit(1);
+ }
+ }
+
+ if (opt_list == 1)
+ printf("offset\tcount\tflags\n");
+ if (opt_list == 2)
+ printf("offset\tflags\n");
+
+ walk_addr_ranges();
+
+ if (opt_list == 1)
+ show_page_range(0, 0); /* drain the buffer */
+
+ if (opt_no_summary)
+ return 0;
+
+ if (opt_list)
+ printf("\n\n");
+
+ show_summary();
+
+ return 0;
+}
--- linux-mm.orig/Documentation/vm/.gitignore 2009-08-31 14:10:15.000000000 +0800
+++ linux-mm/Documentation/vm/.gitignore 2009-09-02 11:32:08.000000000 +0800
@@ -1,2 +1 @@
-page-types
slabinfo
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/.gitignore 2009-09-02 11:32:08.000000000 +0800
@@ -0,0 +1 @@
+page-types
--- linux-mm.orig/Documentation/vm/Makefile 2009-08-31 14:40:44.000000000 +0800
+++ linux-mm/Documentation/vm/Makefile 2009-09-02 11:32:08.000000000 +0800
@@ -2,7 +2,7 @@
obj- := dummy.o
# List of programs to build
-hostprogs-y := slabinfo page-types
+hostprogs-y := slabinfo
# Tell kbuild to always build the programs
always := $(hostprogs-y)
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/Makefile 2009-09-02 11:32:08.000000000 +0800
@@ -0,0 +1,5 @@
+# List of programs to build
+hostprogs-y := page-types
+
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
--- linux-mm.orig/Documentation/vm/pagemap.txt 2009-09-02 11:33:25.000000000 +0800
+++ linux-mm/Documentation/vm/pagemap.txt 2009-09-02 11:35:07.000000000 +0800
@@ -110,7 +110,9 @@ Short descriptions to the page flags:
13. SWAPCACHE page is mapped to swap space, ie. has an associated swap entry
14. SWAPBACKED page is backed by swap/RAM
-The page-types tool in this directory can be used to query the above flags.
+The page-types tool can be used to query the above flags:
+
+ gcc -o page-types tools/vm/page-types.c
Using pagemap to do something useful:
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [RFC][PATCH 2/4] slabinfo: move from Documentation/vm/ to tools/vm/
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 1/4] page-types: move from " Wu Fengguang
@ 2009-09-02 3:41 ` Wu Fengguang
2009-09-02 4:17 ` [RFC][PATCH 2/4 v2] " Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 3/4] pagemap: export KPF_HWPOISON Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 4/4] pagemap: document KPF_KSM and show it in page-types Wu Fengguang
3 siblings, 1 reply; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 3:41 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Lin Ming, Nick Piggin, Christoph Lameter, Wu Fengguang,
KOSAKI Motohiro, Randy Dunlap, Chris Wright, Huang, Ying,
Josh Triplett, Andi Kleen, linux-mm
[-- Attachment #1: mm-move-slabinfo.patch --]
[-- Type: text/plain, Size: 122214 bytes --]
CC: Lin Ming <ming.m.lin@intel.com>
CC: Nick Piggin <nickpiggin@yahoo.com.au>
CC: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Documentation/vm/.gitignore | 1
Documentation/vm/Makefile | 8
Documentation/vm/slabinfo.c | 1364 ----------------------------------
Documentation/vm/slqbinfo.c | 1047 --------------------------
Documentation/vm/slub.txt | 2
tools/vm/.gitignore | 2
tools/vm/Makefile | 2
tools/vm/slabinfo.c | 1364 ++++++++++++++++++++++++++++++++++
tools/vm/slqbinfo.c | 1047 ++++++++++++++++++++++++++
9 files changed, 2415 insertions(+), 2422 deletions(-)
--- linux-mm.orig/Documentation/vm/slabinfo.c 2009-09-02 11:27:38.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,1364 +0,0 @@
-/*
- * Slabinfo: Tool to get reports about slabs
- *
- * (C) 2007 sgi, Christoph Lameter
- *
- * Compile by:
- *
- * gcc -o slabinfo slabinfo.c
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <getopt.h>
-#include <regex.h>
-#include <errno.h>
-
-#define MAX_SLABS 500
-#define MAX_ALIASES 500
-#define MAX_NODES 1024
-
-struct slabinfo {
- char *name;
- int alias;
- int refs;
- int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
- int hwcache_align, object_size, objs_per_slab;
- int sanity_checks, slab_size, store_user, trace;
- int order, poison, reclaim_account, red_zone;
- unsigned long partial, objects, slabs, objects_partial, objects_total;
- unsigned long alloc_fastpath, alloc_slowpath;
- unsigned long free_fastpath, free_slowpath;
- unsigned long free_frozen, free_add_partial, free_remove_partial;
- unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
- unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
- unsigned long deactivate_to_head, deactivate_to_tail;
- unsigned long deactivate_remote_frees, order_fallback;
- int numa[MAX_NODES];
- int numa_partial[MAX_NODES];
-} slabinfo[MAX_SLABS];
-
-struct aliasinfo {
- char *name;
- char *ref;
- struct slabinfo *slab;
-} aliasinfo[MAX_ALIASES];
-
-int slabs = 0;
-int actual_slabs = 0;
-int aliases = 0;
-int alias_targets = 0;
-int highest_node = 0;
-
-char buffer[4096];
-
-int show_empty = 0;
-int show_report = 0;
-int show_alias = 0;
-int show_slab = 0;
-int skip_zero = 1;
-int show_numa = 0;
-int show_track = 0;
-int show_first_alias = 0;
-int validate = 0;
-int shrink = 0;
-int show_inverted = 0;
-int show_single_ref = 0;
-int show_totals = 0;
-int sort_size = 0;
-int sort_active = 0;
-int set_debug = 0;
-int show_ops = 0;
-int show_activity = 0;
-
-/* Debug options */
-int sanity = 0;
-int redzone = 0;
-int poison = 0;
-int tracking = 0;
-int tracing = 0;
-
-int page_size;
-
-regex_t pattern;
-
-static void fatal(const char *x, ...)
-{
- va_list ap;
-
- va_start(ap, x);
- vfprintf(stderr, x, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-static void usage(void)
-{
- printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
- "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
- "-a|--aliases Show aliases\n"
- "-A|--activity Most active slabs first\n"
- "-d<options>|--debug=<options> Set/Clear Debug options\n"
- "-D|--display-active Switch line format to activity\n"
- "-e|--empty Show empty slabs\n"
- "-f|--first-alias Show first alias\n"
- "-h|--help Show usage information\n"
- "-i|--inverted Inverted list\n"
- "-l|--slabs Show slabs\n"
- "-n|--numa Show NUMA information\n"
- "-o|--ops Show kmem_cache_ops\n"
- "-s|--shrink Shrink slabs\n"
- "-r|--report Detailed report on single slabs\n"
- "-S|--Size Sort by size\n"
- "-t|--tracking Show alloc/free information\n"
- "-T|--Totals Show summary information\n"
- "-v|--validate Validate slabs\n"
- "-z|--zero Include empty slabs\n"
- "-1|--1ref Single reference\n"
- "\nValid debug options (FZPUT may be combined)\n"
- "a / A Switch on all debug options (=FZUP)\n"
- "- Switch off all debug options\n"
- "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
- "z / Z Redzoning\n"
- "p / P Poisoning\n"
- "u / U Tracking\n"
- "t / T Tracing\n"
- );
-}
-
-static unsigned long read_obj(const char *name)
-{
- FILE *f = fopen(name, "r");
-
- if (!f)
- buffer[0] = 0;
- else {
- if (!fgets(buffer, sizeof(buffer), f))
- buffer[0] = 0;
- fclose(f);
- if (buffer[strlen(buffer)] == '\n')
- buffer[strlen(buffer)] = 0;
- }
- return strlen(buffer);
-}
-
-
-/*
- * Get the contents of an attribute
- */
-static unsigned long get_obj(const char *name)
-{
- if (!read_obj(name))
- return 0;
-
- return atol(buffer);
-}
-
-static unsigned long get_obj_and_str(const char *name, char **x)
-{
- unsigned long result = 0;
- char *p;
-
- *x = NULL;
-
- if (!read_obj(name)) {
- x = NULL;
- return 0;
- }
- result = strtoul(buffer, &p, 10);
- while (*p == ' ')
- p++;
- if (*p)
- *x = strdup(p);
- return result;
-}
-
-static void set_obj(struct slabinfo *s, const char *name, int n)
-{
- char x[100];
- FILE *f;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "w");
- if (!f)
- fatal("Cannot write to %s\n", x);
-
- fprintf(f, "%d\n", n);
- fclose(f);
-}
-
-static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
-{
- char x[100];
- FILE *f;
- size_t l;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "r");
- if (!f) {
- buffer[0] = 0;
- l = 0;
- } else {
- l = fread(buffer, 1, sizeof(buffer), f);
- buffer[l] = 0;
- fclose(f);
- }
- return l;
-}
-
-
-/*
- * Put a size string together
- */
-static int store_size(char *buffer, unsigned long value)
-{
- unsigned long divisor = 1;
- char trailer = 0;
- int n;
-
- if (value > 1000000000UL) {
- divisor = 100000000UL;
- trailer = 'G';
- } else if (value > 1000000UL) {
- divisor = 100000UL;
- trailer = 'M';
- } else if (value > 1000UL) {
- divisor = 100;
- trailer = 'K';
- }
-
- value /= divisor;
- n = sprintf(buffer, "%ld",value);
- if (trailer) {
- buffer[n] = trailer;
- n++;
- buffer[n] = 0;
- }
- if (divisor != 1) {
- memmove(buffer + n - 2, buffer + n - 3, 4);
- buffer[n-2] = '.';
- n++;
- }
- return n;
-}
-
-static void decode_numa_list(int *numa, char *t)
-{
- int node;
- int nr;
-
- memset(numa, 0, MAX_NODES * sizeof(int));
-
- if (!t)
- return;
-
- while (*t == 'N') {
- t++;
- node = strtoul(t, &t, 10);
- if (*t == '=') {
- t++;
- nr = strtoul(t, &t, 10);
- numa[node] = nr;
- if (node > highest_node)
- highest_node = node;
- }
- while (*t == ' ')
- t++;
- }
-}
-
-static void slab_validate(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "validate", 1);
-}
-
-static void slab_shrink(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "shrink", 1);
-}
-
-int line = 0;
-
-static void first_line(void)
-{
- if (show_activity)
- printf("Name Objects Alloc Free %%Fast Fallb O\n");
- else
- printf("Name Objects Objsize Space "
- "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
-}
-
-/*
- * Find the shortest alias of a slab
- */
-static struct aliasinfo *find_one_alias(struct slabinfo *find)
-{
- struct aliasinfo *a;
- struct aliasinfo *best = NULL;
-
- for(a = aliasinfo;a < aliasinfo + aliases; a++) {
- if (a->slab == find &&
- (!best || strlen(best->name) < strlen(a->name))) {
- best = a;
- if (strncmp(a->name,"kmall", 5) == 0)
- return best;
- }
- }
- return best;
-}
-
-static unsigned long slab_size(struct slabinfo *s)
-{
- return s->slabs * (page_size << s->order);
-}
-
-static unsigned long slab_activity(struct slabinfo *s)
-{
- return s->alloc_fastpath + s->free_fastpath +
- s->alloc_slowpath + s->free_slowpath;
-}
-
-static void slab_numa(struct slabinfo *s, int mode)
-{
- int node;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (!highest_node) {
- printf("\n%s: No NUMA information available.\n", s->name);
- return;
- }
-
- if (skip_zero && !s->slabs)
- return;
-
- if (!line) {
- printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
- for(node = 0; node <= highest_node; node++)
- printf(" %4d", node);
- printf("\n----------------------");
- for(node = 0; node <= highest_node; node++)
- printf("-----");
- printf("\n");
- }
- printf("%-21s ", mode ? "All slabs" : s->name);
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa[node]);
- printf(" %4s", b);
- }
- printf("\n");
- if (mode) {
- printf("%-21s ", "Partial slabs");
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa_partial[node]);
- printf(" %4s", b);
- }
- printf("\n");
- }
- line++;
-}
-
-static void show_tracking(struct slabinfo *s)
-{
- printf("\n%s: Kernel object allocation\n", s->name);
- printf("-----------------------------------------------------------------------\n");
- if (read_slab_obj(s, "alloc_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
- printf("\n%s: Kernel object freeing\n", s->name);
- printf("------------------------------------------------------------------------\n");
- if (read_slab_obj(s, "free_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
-}
-
-static void ops(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (read_slab_obj(s, "ops")) {
- printf("\n%s: kmem_cache operations\n", s->name);
- printf("--------------------------------------------\n");
- printf(buffer);
- } else
- printf("\n%s has no kmem_cache operations\n", s->name);
-}
-
-static const char *onoff(int x)
-{
- if (x)
- return "On ";
- return "Off";
-}
-
-static void slab_stats(struct slabinfo *s)
-{
- unsigned long total_alloc;
- unsigned long total_free;
- unsigned long total;
-
- if (!s->alloc_slab)
- return;
-
- total_alloc = s->alloc_fastpath + s->alloc_slowpath;
- total_free = s->free_fastpath + s->free_slowpath;
-
- if (!total_alloc)
- return;
-
- printf("\n");
- printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
- printf("--------------------------------------------------\n");
- printf("Fastpath %8lu %8lu %3lu %3lu\n",
- s->alloc_fastpath, s->free_fastpath,
- s->alloc_fastpath * 100 / total_alloc,
- s->free_fastpath * 100 / total_free);
- printf("Slowpath %8lu %8lu %3lu %3lu\n",
- total_alloc - s->alloc_fastpath, s->free_slowpath,
- (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
- s->free_slowpath * 100 / total_free);
- printf("Page Alloc %8lu %8lu %3lu %3lu\n",
- s->alloc_slab, s->free_slab,
- s->alloc_slab * 100 / total_alloc,
- s->free_slab * 100 / total_free);
- printf("Add partial %8lu %8lu %3lu %3lu\n",
- s->deactivate_to_head + s->deactivate_to_tail,
- s->free_add_partial,
- (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
- s->free_add_partial * 100 / total_free);
- printf("Remove partial %8lu %8lu %3lu %3lu\n",
- s->alloc_from_partial, s->free_remove_partial,
- s->alloc_from_partial * 100 / total_alloc,
- s->free_remove_partial * 100 / total_free);
-
- printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
- s->deactivate_remote_frees, s->free_frozen,
- s->deactivate_remote_frees * 100 / total_alloc,
- s->free_frozen * 100 / total_free);
-
- printf("Total %8lu %8lu\n\n", total_alloc, total_free);
-
- if (s->cpuslab_flush)
- printf("Flushes %8lu\n", s->cpuslab_flush);
-
- if (s->alloc_refill)
- printf("Refill %8lu\n", s->alloc_refill);
-
- total = s->deactivate_full + s->deactivate_empty +
- s->deactivate_to_head + s->deactivate_to_tail;
-
- if (total)
- printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
- "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
- s->deactivate_full, (s->deactivate_full * 100) / total,
- s->deactivate_empty, (s->deactivate_empty * 100) / total,
- s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
- s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
-}
-
-static void report(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
- s->name, s->aliases, s->order, s->objects);
- if (s->hwcache_align)
- printf("** Hardware cacheline aligned\n");
- if (s->cache_dma)
- printf("** Memory is allocated in a special DMA zone\n");
- if (s->destroy_by_rcu)
- printf("** Slabs are destroyed via RCU\n");
- if (s->reclaim_account)
- printf("** Reclaim accounting active\n");
-
- printf("\nSizes (bytes) Slabs Debug Memory\n");
- printf("------------------------------------------------------------------------\n");
- printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
- s->object_size, s->slabs, onoff(s->sanity_checks),
- s->slabs * (page_size << s->order));
- printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
- s->slab_size, s->slabs - s->partial - s->cpu_slabs,
- onoff(s->red_zone), s->objects * s->object_size);
- printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
- page_size << s->order, s->partial, onoff(s->poison),
- s->slabs * (page_size << s->order) - s->objects * s->object_size);
- printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
- s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
- (s->slab_size - s->object_size) * s->objects);
- printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
- s->align, s->objs_per_slab, onoff(s->trace),
- ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
- s->slabs);
-
- ops(s);
- show_tracking(s);
- slab_numa(s, 1);
- slab_stats(s);
-}
-
-static void slabcache(struct slabinfo *s)
-{
- char size_str[20];
- char dist_str[40];
- char flags[20];
- char *p = flags;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (actual_slabs == 1) {
- report(s);
- return;
- }
-
- if (skip_zero && !show_empty && !s->slabs)
- return;
-
- if (show_empty && s->slabs)
- return;
-
- store_size(size_str, slab_size(s));
- snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
- s->partial, s->cpu_slabs);
-
- if (!line++)
- first_line();
-
- if (s->aliases)
- *p++ = '*';
- if (s->cache_dma)
- *p++ = 'd';
- if (s->hwcache_align)
- *p++ = 'A';
- if (s->poison)
- *p++ = 'P';
- if (s->reclaim_account)
- *p++ = 'a';
- if (s->red_zone)
- *p++ = 'Z';
- if (s->sanity_checks)
- *p++ = 'F';
- if (s->store_user)
- *p++ = 'U';
- if (s->trace)
- *p++ = 'T';
-
- *p = 0;
- if (show_activity) {
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc_fastpath + s->alloc_slowpath;
- total_free = s->free_fastpath + s->free_slowpath;
-
- printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
- s->name, s->objects,
- total_alloc, total_free,
- total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
- total_free ? (s->free_fastpath * 100 / total_free) : 0,
- s->order_fallback, s->order);
- }
- else
- printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
- s->name, s->objects, s->object_size, size_str, dist_str,
- s->objs_per_slab, s->order,
- s->slabs ? (s->partial * 100) / s->slabs : 100,
- s->slabs ? (s->objects * s->object_size * 100) /
- (s->slabs * (page_size << s->order)) : 100,
- flags);
-}
-
-/*
- * Analyze debug options. Return false if something is amiss.
- */
-static int debug_opt_scan(char *opt)
-{
- if (!opt || !opt[0] || strcmp(opt, "-") == 0)
- return 1;
-
- if (strcasecmp(opt, "a") == 0) {
- sanity = 1;
- poison = 1;
- redzone = 1;
- tracking = 1;
- return 1;
- }
-
- for ( ; *opt; opt++)
- switch (*opt) {
- case 'F' : case 'f':
- if (sanity)
- return 0;
- sanity = 1;
- break;
- case 'P' : case 'p':
- if (poison)
- return 0;
- poison = 1;
- break;
-
- case 'Z' : case 'z':
- if (redzone)
- return 0;
- redzone = 1;
- break;
-
- case 'U' : case 'u':
- if (tracking)
- return 0;
- tracking = 1;
- break;
-
- case 'T' : case 't':
- if (tracing)
- return 0;
- tracing = 1;
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-static int slab_empty(struct slabinfo *s)
-{
- if (s->objects > 0)
- return 0;
-
- /*
- * We may still have slabs even if there are no objects. Shrinking will
- * remove them.
- */
- if (s->slabs != 0)
- set_obj(s, "shrink", 1);
-
- return 1;
-}
-
-static void slab_debug(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (sanity && !s->sanity_checks) {
- set_obj(s, "sanity", 1);
- }
- if (!sanity && s->sanity_checks) {
- if (slab_empty(s))
- set_obj(s, "sanity", 0);
- else
- fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
- }
- if (redzone && !s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 1);
- else
- fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
- }
- if (!redzone && s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 0);
- else
- fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
- }
- if (poison && !s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 1);
- else
- fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
- }
- if (!poison && s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 0);
- else
- fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
- }
- if (tracking && !s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 1);
- else
- fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
- }
- if (!tracking && s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 0);
- else
- fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
- }
- if (tracing && !s->trace) {
- if (slabs == 1)
- set_obj(s, "trace", 1);
- else
- fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
- }
- if (!tracing && s->trace)
- set_obj(s, "trace", 1);
-}
-
-static void totals(void)
-{
- struct slabinfo *s;
-
- int used_slabs = 0;
- char b1[20], b2[20], b3[20], b4[20];
- unsigned long long max = 1ULL << 63;
-
- /* Object size */
- unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
-
- /* Number of partial slabs in a slabcache */
- unsigned long long min_partial = max, max_partial = 0,
- avg_partial, total_partial = 0;
-
- /* Number of slabs in a slab cache */
- unsigned long long min_slabs = max, max_slabs = 0,
- avg_slabs, total_slabs = 0;
-
- /* Size of the whole slab */
- unsigned long long min_size = max, max_size = 0,
- avg_size, total_size = 0;
-
- /* Bytes used for object storage in a slab */
- unsigned long long min_used = max, max_used = 0,
- avg_used, total_used = 0;
-
- /* Waste: Bytes used for alignment and padding */
- unsigned long long min_waste = max, max_waste = 0,
- avg_waste, total_waste = 0;
- /* Number of objects in a slab */
- unsigned long long min_objects = max, max_objects = 0,
- avg_objects, total_objects = 0;
- /* Waste per object */
- unsigned long long min_objwaste = max,
- max_objwaste = 0, avg_objwaste,
- total_objwaste = 0;
-
- /* Memory per object */
- unsigned long long min_memobj = max,
- max_memobj = 0, avg_memobj,
- total_objsize = 0;
-
- /* Percentage of partial slabs per slab */
- unsigned long min_ppart = 100, max_ppart = 0,
- avg_ppart, total_ppart = 0;
-
- /* Number of objects in partial slabs */
- unsigned long min_partobj = max, max_partobj = 0,
- avg_partobj, total_partobj = 0;
-
- /* Percentage of partial objects of all objects in a slab */
- unsigned long min_ppartobj = 100, max_ppartobj = 0,
- avg_ppartobj, total_ppartobj = 0;
-
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- unsigned long long size;
- unsigned long used;
- unsigned long long wasted;
- unsigned long long objwaste;
- unsigned long percentage_partial_slabs;
- unsigned long percentage_partial_objs;
-
- if (!s->slabs || !s->objects)
- continue;
-
- used_slabs++;
-
- size = slab_size(s);
- used = s->objects * s->object_size;
- wasted = size - used;
- objwaste = s->slab_size - s->object_size;
-
- percentage_partial_slabs = s->partial * 100 / s->slabs;
- if (percentage_partial_slabs > 100)
- percentage_partial_slabs = 100;
-
- percentage_partial_objs = s->objects_partial * 100
- / s->objects;
-
- if (percentage_partial_objs > 100)
- percentage_partial_objs = 100;
-
- if (s->object_size < min_objsize)
- min_objsize = s->object_size;
- if (s->partial < min_partial)
- min_partial = s->partial;
- if (s->slabs < min_slabs)
- min_slabs = s->slabs;
- if (size < min_size)
- min_size = size;
- if (wasted < min_waste)
- min_waste = wasted;
- if (objwaste < min_objwaste)
- min_objwaste = objwaste;
- if (s->objects < min_objects)
- min_objects = s->objects;
- if (used < min_used)
- min_used = used;
- if (s->objects_partial < min_partobj)
- min_partobj = s->objects_partial;
- if (percentage_partial_slabs < min_ppart)
- min_ppart = percentage_partial_slabs;
- if (percentage_partial_objs < min_ppartobj)
- min_ppartobj = percentage_partial_objs;
- if (s->slab_size < min_memobj)
- min_memobj = s->slab_size;
-
- if (s->object_size > max_objsize)
- max_objsize = s->object_size;
- if (s->partial > max_partial)
- max_partial = s->partial;
- if (s->slabs > max_slabs)
- max_slabs = s->slabs;
- if (size > max_size)
- max_size = size;
- if (wasted > max_waste)
- max_waste = wasted;
- if (objwaste > max_objwaste)
- max_objwaste = objwaste;
- if (s->objects > max_objects)
- max_objects = s->objects;
- if (used > max_used)
- max_used = used;
- if (s->objects_partial > max_partobj)
- max_partobj = s->objects_partial;
- if (percentage_partial_slabs > max_ppart)
- max_ppart = percentage_partial_slabs;
- if (percentage_partial_objs > max_ppartobj)
- max_ppartobj = percentage_partial_objs;
- if (s->slab_size > max_memobj)
- max_memobj = s->slab_size;
-
- total_partial += s->partial;
- total_slabs += s->slabs;
- total_size += size;
- total_waste += wasted;
-
- total_objects += s->objects;
- total_used += used;
- total_partobj += s->objects_partial;
- total_ppart += percentage_partial_slabs;
- total_ppartobj += percentage_partial_objs;
-
- total_objwaste += s->objects * objwaste;
- total_objsize += s->objects * s->slab_size;
- }
-
- if (!total_objects) {
- printf("No objects\n");
- return;
- }
- if (!used_slabs) {
- printf("No slabs\n");
- return;
- }
-
- /* Per slab averages */
- avg_partial = total_partial / used_slabs;
- avg_slabs = total_slabs / used_slabs;
- avg_size = total_size / used_slabs;
- avg_waste = total_waste / used_slabs;
-
- avg_objects = total_objects / used_slabs;
- avg_used = total_used / used_slabs;
- avg_partobj = total_partobj / used_slabs;
- avg_ppart = total_ppart / used_slabs;
- avg_ppartobj = total_ppartobj / used_slabs;
-
- /* Per object object sizes */
- avg_objsize = total_used / total_objects;
- avg_objwaste = total_objwaste / total_objects;
- avg_partobj = total_partobj * 100 / total_objects;
- avg_memobj = total_objsize / total_objects;
-
- printf("Slabcache Totals\n");
- printf("----------------\n");
- printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
- slabs, aliases, alias_targets, used_slabs);
-
- store_size(b1, total_size);store_size(b2, total_waste);
- store_size(b3, total_waste * 100 / total_used);
- printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
-
- store_size(b1, total_objects);store_size(b2, total_partobj);
- store_size(b3, total_partobj * 100 / total_objects);
- printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
-
- printf("\n");
- printf("Per Cache Average Min Max Total\n");
- printf("---------------------------------------------------------\n");
-
- store_size(b1, avg_objects);store_size(b2, min_objects);
- store_size(b3, max_objects);store_size(b4, total_objects);
- printf("#Objects %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_slabs);store_size(b2, min_slabs);
- store_size(b3, max_slabs);store_size(b4, total_slabs);
- printf("#Slabs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_partial);store_size(b2, min_partial);
- store_size(b3, max_partial);store_size(b4, total_partial);
- printf("#PartSlab %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
- store_size(b1, avg_ppart);store_size(b2, min_ppart);
- store_size(b3, max_ppart);
- store_size(b4, total_partial * 100 / total_slabs);
- printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_partobj);store_size(b2, min_partobj);
- store_size(b3, max_partobj);
- store_size(b4, total_partobj);
- printf("PartObjs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
- store_size(b3, max_ppartobj);
- store_size(b4, total_partobj * 100 / total_objects);
- printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_size);store_size(b2, min_size);
- store_size(b3, max_size);store_size(b4, total_size);
- printf("Memory %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_used);store_size(b2, min_used);
- store_size(b3, max_used);store_size(b4, total_used);
- printf("Used %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_waste);store_size(b2, min_waste);
- store_size(b3, max_waste);store_size(b4, total_waste);
- printf("Loss %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- printf("\n");
- printf("Per Object Average Min Max\n");
- printf("---------------------------------------------\n");
-
- store_size(b1, avg_memobj);store_size(b2, min_memobj);
- store_size(b3, max_memobj);
- printf("Memory %10s %10s %10s\n",
- b1, b2, b3);
- store_size(b1, avg_objsize);store_size(b2, min_objsize);
- store_size(b3, max_objsize);
- printf("User %10s %10s %10s\n",
- b1, b2, b3);
-
- store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
- store_size(b3, max_objwaste);
- printf("Loss %10s %10s %10s\n",
- b1, b2, b3);
-}
-
-static void sort_slabs(void)
-{
- struct slabinfo *s1,*s2;
-
- for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
- for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
- int result;
-
- if (sort_size)
- result = slab_size(s1) < slab_size(s2);
- else if (sort_active)
- result = slab_activity(s1) < slab_activity(s2);
- else
- result = strcasecmp(s1->name, s2->name);
-
- if (show_inverted)
- result = -result;
-
- if (result > 0) {
- struct slabinfo t;
-
- memcpy(&t, s1, sizeof(struct slabinfo));
- memcpy(s1, s2, sizeof(struct slabinfo));
- memcpy(s2, &t, sizeof(struct slabinfo));
- }
- }
- }
-}
-
-static void sort_aliases(void)
-{
- struct aliasinfo *a1,*a2;
-
- for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
- for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
- char *n1, *n2;
-
- n1 = a1->name;
- n2 = a2->name;
- if (show_alias && !show_inverted) {
- n1 = a1->ref;
- n2 = a2->ref;
- }
- if (strcasecmp(n1, n2) > 0) {
- struct aliasinfo t;
-
- memcpy(&t, a1, sizeof(struct aliasinfo));
- memcpy(a1, a2, sizeof(struct aliasinfo));
- memcpy(a2, &t, sizeof(struct aliasinfo));
- }
- }
- }
-}
-
-static void link_slabs(void)
-{
- struct aliasinfo *a;
- struct slabinfo *s;
-
- for (a = aliasinfo; a < aliasinfo + aliases; a++) {
-
- for (s = slabinfo; s < slabinfo + slabs; s++)
- if (strcmp(a->ref, s->name) == 0) {
- a->slab = s;
- s->refs++;
- break;
- }
- if (s == slabinfo + slabs)
- fatal("Unresolved alias %s\n", a->ref);
- }
-}
-
-static void alias(void)
-{
- struct aliasinfo *a;
- char *active = NULL;
-
- sort_aliases();
- link_slabs();
-
- for(a = aliasinfo; a < aliasinfo + aliases; a++) {
-
- if (!show_single_ref && a->slab->refs == 1)
- continue;
-
- if (!show_inverted) {
- if (active) {
- if (strcmp(a->slab->name, active) == 0) {
- printf(" %s", a->name);
- continue;
- }
- }
- printf("\n%-12s <- %s", a->slab->name, a->name);
- active = a->slab->name;
- }
- else
- printf("%-20s -> %s\n", a->name, a->slab->name);
- }
- if (active)
- printf("\n");
-}
-
-
-static void rename_slabs(void)
-{
- struct slabinfo *s;
- struct aliasinfo *a;
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- if (*s->name != ':')
- continue;
-
- if (s->refs > 1 && !show_first_alias)
- continue;
-
- a = find_one_alias(s);
-
- if (a)
- s->name = a->name;
- else {
- s->name = "*";
- actual_slabs--;
- }
- }
-}
-
-static int slab_mismatch(char *slab)
-{
- return regexec(&pattern, slab, 0, NULL, 0);
-}
-
-static void read_slab_dir(void)
-{
- DIR *dir;
- struct dirent *de;
- struct slabinfo *slab = slabinfo;
- struct aliasinfo *alias = aliasinfo;
- char *p;
- char *t;
- int count;
-
- if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
- fatal("SYSFS support for SLUB not active\n");
-
- dir = opendir(".");
- while ((de = readdir(dir))) {
- if (de->d_name[0] == '.' ||
- (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
- continue;
- switch (de->d_type) {
- case DT_LNK:
- alias->name = strdup(de->d_name);
- count = readlink(de->d_name, buffer, sizeof(buffer));
-
- if (count < 0)
- fatal("Cannot read symlink %s\n", de->d_name);
-
- buffer[count] = 0;
- p = buffer + count;
- while (p > buffer && p[-1] != '/')
- p--;
- alias->ref = strdup(p);
- alias++;
- break;
- case DT_DIR:
- if (chdir(de->d_name))
- fatal("Unable to access slab %s\n", slab->name);
- slab->name = strdup(de->d_name);
- slab->alias = 0;
- slab->refs = 0;
- slab->aliases = get_obj("aliases");
- slab->align = get_obj("align");
- slab->cache_dma = get_obj("cache_dma");
- slab->cpu_slabs = get_obj("cpu_slabs");
- slab->destroy_by_rcu = get_obj("destroy_by_rcu");
- slab->hwcache_align = get_obj("hwcache_align");
- slab->object_size = get_obj("object_size");
- slab->objects = get_obj("objects");
- slab->objects_partial = get_obj("objects_partial");
- slab->objects_total = get_obj("objects_total");
- slab->objs_per_slab = get_obj("objs_per_slab");
- slab->order = get_obj("order");
- slab->partial = get_obj("partial");
- slab->partial = get_obj_and_str("partial", &t);
- decode_numa_list(slab->numa_partial, t);
- free(t);
- slab->poison = get_obj("poison");
- slab->reclaim_account = get_obj("reclaim_account");
- slab->red_zone = get_obj("red_zone");
- slab->sanity_checks = get_obj("sanity_checks");
- slab->slab_size = get_obj("slab_size");
- slab->slabs = get_obj_and_str("slabs", &t);
- decode_numa_list(slab->numa, t);
- free(t);
- slab->store_user = get_obj("store_user");
- slab->trace = get_obj("trace");
- slab->alloc_fastpath = get_obj("alloc_fastpath");
- slab->alloc_slowpath = get_obj("alloc_slowpath");
- slab->free_fastpath = get_obj("free_fastpath");
- slab->free_slowpath = get_obj("free_slowpath");
- slab->free_frozen= get_obj("free_frozen");
- slab->free_add_partial = get_obj("free_add_partial");
- slab->free_remove_partial = get_obj("free_remove_partial");
- slab->alloc_from_partial = get_obj("alloc_from_partial");
- slab->alloc_slab = get_obj("alloc_slab");
- slab->alloc_refill = get_obj("alloc_refill");
- slab->free_slab = get_obj("free_slab");
- slab->cpuslab_flush = get_obj("cpuslab_flush");
- slab->deactivate_full = get_obj("deactivate_full");
- slab->deactivate_empty = get_obj("deactivate_empty");
- slab->deactivate_to_head = get_obj("deactivate_to_head");
- slab->deactivate_to_tail = get_obj("deactivate_to_tail");
- slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
- slab->order_fallback = get_obj("order_fallback");
- chdir("..");
- if (slab->name[0] == ':')
- alias_targets++;
- slab++;
- break;
- default :
- fatal("Unknown file type %lx\n", de->d_type);
- }
- }
- closedir(dir);
- slabs = slab - slabinfo;
- actual_slabs = slabs;
- aliases = alias - aliasinfo;
- if (slabs > MAX_SLABS)
- fatal("Too many slabs\n");
- if (aliases > MAX_ALIASES)
- fatal("Too many aliases\n");
-}
-
-static void output_slabs(void)
-{
- struct slabinfo *slab;
-
- for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
-
- if (slab->alias)
- continue;
-
-
- if (show_numa)
- slab_numa(slab, 0);
- else if (show_track)
- show_tracking(slab);
- else if (validate)
- slab_validate(slab);
- else if (shrink)
- slab_shrink(slab);
- else if (set_debug)
- slab_debug(slab);
- else if (show_ops)
- ops(slab);
- else if (show_slab)
- slabcache(slab);
- else if (show_report)
- report(slab);
- }
-}
-
-struct option opts[] = {
- { "aliases", 0, NULL, 'a' },
- { "activity", 0, NULL, 'A' },
- { "debug", 2, NULL, 'd' },
- { "display-activity", 0, NULL, 'D' },
- { "empty", 0, NULL, 'e' },
- { "first-alias", 0, NULL, 'f' },
- { "help", 0, NULL, 'h' },
- { "inverted", 0, NULL, 'i'},
- { "numa", 0, NULL, 'n' },
- { "ops", 0, NULL, 'o' },
- { "report", 0, NULL, 'r' },
- { "shrink", 0, NULL, 's' },
- { "slabs", 0, NULL, 'l' },
- { "track", 0, NULL, 't'},
- { "validate", 0, NULL, 'v' },
- { "zero", 0, NULL, 'z' },
- { "1ref", 0, NULL, '1'},
- { NULL, 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- int c;
- int err;
- char *pattern_source;
-
- page_size = getpagesize();
-
- while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
- opts, NULL)) != -1)
- switch (c) {
- case '1':
- show_single_ref = 1;
- break;
- case 'a':
- show_alias = 1;
- break;
- case 'A':
- sort_active = 1;
- break;
- case 'd':
- set_debug = 1;
- if (!debug_opt_scan(optarg))
- fatal("Invalid debug option '%s'\n", optarg);
- break;
- case 'D':
- show_activity = 1;
- break;
- case 'e':
- show_empty = 1;
- break;
- case 'f':
- show_first_alias = 1;
- break;
- case 'h':
- usage();
- return 0;
- case 'i':
- show_inverted = 1;
- break;
- case 'n':
- show_numa = 1;
- break;
- case 'o':
- show_ops = 1;
- break;
- case 'r':
- show_report = 1;
- break;
- case 's':
- shrink = 1;
- break;
- case 'l':
- show_slab = 1;
- break;
- case 't':
- show_track = 1;
- break;
- case 'v':
- validate = 1;
- break;
- case 'z':
- skip_zero = 0;
- break;
- case 'T':
- show_totals = 1;
- break;
- case 'S':
- sort_size = 1;
- break;
-
- default:
- fatal("%s: Invalid option '%c'\n", argv[0], optopt);
-
- }
-
- if (!show_slab && !show_alias && !show_track && !show_report
- && !validate && !shrink && !set_debug && !show_ops)
- show_slab = 1;
-
- if (argc > optind)
- pattern_source = argv[optind];
- else
- pattern_source = ".*";
-
- err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
- if (err)
- fatal("%s: Invalid pattern '%s' code %d\n",
- argv[0], pattern_source, err);
- read_slab_dir();
- if (show_alias)
- alias();
- else
- if (show_totals)
- totals();
- else {
- link_slabs();
- rename_slabs();
- sort_slabs();
- output_slabs();
- }
- return 0;
-}
--- linux-mm.orig/Documentation/vm/slqbinfo.c 2009-09-02 11:27:38.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,1047 +0,0 @@
-/*
- * Slabinfo: Tool to get reports about slabs
- *
- * (C) 2007 sgi, Christoph Lameter
- *
- * Reworked by Lin Ming <ming.m.lin@intel.com> for SLQB
- *
- * Compile by:
- *
- * gcc -o slabinfo slabinfo.c
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <getopt.h>
-#include <regex.h>
-#include <errno.h>
-
-#define MAX_SLABS 500
-#define MAX_ALIASES 500
-#define MAX_NODES 1024
-
-struct slabinfo {
- char *name;
- int align, cache_dma, destroy_by_rcu;
- int hwcache_align, object_size, objs_per_slab;
- int slab_size, store_user;
- int order, poison, reclaim_account, red_zone;
- int batch;
- unsigned long objects, slabs, total_objects;
- unsigned long alloc, alloc_slab_fill, alloc_slab_new;
- unsigned long free, free_remote;
- unsigned long claim_remote_list, claim_remote_list_objects;
- unsigned long flush_free_list, flush_free_list_objects, flush_free_list_remote;
- unsigned long flush_rfree_list, flush_rfree_list_objects;
- unsigned long flush_slab_free, flush_slab_partial;
- int numa[MAX_NODES];
- int numa_partial[MAX_NODES];
-} slabinfo[MAX_SLABS];
-
-int slabs = 0;
-int actual_slabs = 0;
-int highest_node = 0;
-
-char buffer[4096];
-
-int show_empty = 0;
-int show_report = 0;
-int show_slab = 0;
-int skip_zero = 1;
-int show_numa = 0;
-int show_track = 0;
-int validate = 0;
-int shrink = 0;
-int show_inverted = 0;
-int show_totals = 0;
-int sort_size = 0;
-int sort_active = 0;
-int set_debug = 0;
-int show_ops = 0;
-int show_activity = 0;
-
-/* Debug options */
-int sanity = 0;
-int redzone = 0;
-int poison = 0;
-int tracking = 0;
-int tracing = 0;
-
-int page_size;
-
-regex_t pattern;
-
-void fatal(const char *x, ...)
-{
- va_list ap;
-
- va_start(ap, x);
- vfprintf(stderr, x, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-void usage(void)
-{
- printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
- "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
- "-A|--activity Most active slabs first\n"
- "-d<options>|--debug=<options> Set/Clear Debug options\n"
- "-D|--display-active Switch line format to activity\n"
- "-e|--empty Show empty slabs\n"
- "-h|--help Show usage information\n"
- "-i|--inverted Inverted list\n"
- "-l|--slabs Show slabs\n"
- "-n|--numa Show NUMA information\n"
- "-o|--ops Show kmem_cache_ops\n"
- "-s|--shrink Shrink slabs\n"
- "-r|--report Detailed report on single slabs\n"
- "-S|--Size Sort by size\n"
- "-t|--tracking Show alloc/free information\n"
- "-T|--Totals Show summary information\n"
- "-v|--validate Validate slabs\n"
- "-z|--zero Include empty slabs\n"
- "\nValid debug options (FZPUT may be combined)\n"
- "a / A Switch on all debug options (=FZUP)\n"
- "- Switch off all debug options\n"
- "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
- "z / Z Redzoning\n"
- "p / P Poisoning\n"
- "u / U Tracking\n"
- "t / T Tracing\n"
- );
-}
-
-unsigned long read_obj(const char *name)
-{
- FILE *f = fopen(name, "r");
-
- if (!f)
- buffer[0] = 0;
- else {
- if (!fgets(buffer, sizeof(buffer), f))
- buffer[0] = 0;
- fclose(f);
- if (buffer[strlen(buffer)] == '\n')
- buffer[strlen(buffer)] = 0;
- }
- return strlen(buffer);
-}
-
-
-/*
- * Get the contents of an attribute
- */
-unsigned long get_obj(const char *name)
-{
- if (!read_obj(name))
- return 0;
-
- return atol(buffer);
-}
-
-unsigned long get_obj_and_str(const char *name, char **x)
-{
- unsigned long result = 0;
- char *p;
-
- *x = NULL;
-
- if (!read_obj(name)) {
- x = NULL;
- return 0;
- }
- result = strtoul(buffer, &p, 10);
- while (*p == ' ')
- p++;
- if (*p)
- *x = strdup(p);
- return result;
-}
-
-void set_obj(struct slabinfo *s, const char *name, int n)
-{
- char x[100];
- FILE *f;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "w");
- if (!f)
- fatal("Cannot write to %s\n", x);
-
- fprintf(f, "%d\n", n);
- fclose(f);
-}
-
-unsigned long read_slab_obj(struct slabinfo *s, const char *name)
-{
- char x[100];
- FILE *f;
- size_t l;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "r");
- if (!f) {
- buffer[0] = 0;
- l = 0;
- } else {
- l = fread(buffer, 1, sizeof(buffer), f);
- buffer[l] = 0;
- fclose(f);
- }
- return l;
-}
-
-
-/*
- * Put a size string together
- */
-int store_size(char *buffer, unsigned long value)
-{
- unsigned long divisor = 1;
- char trailer = 0;
- int n;
-
- if (value > 1000000000UL) {
- divisor = 100000000UL;
- trailer = 'G';
- } else if (value > 1000000UL) {
- divisor = 100000UL;
- trailer = 'M';
- } else if (value > 1000UL) {
- divisor = 100;
- trailer = 'K';
- }
-
- value /= divisor;
- n = sprintf(buffer, "%ld",value);
- if (trailer) {
- buffer[n] = trailer;
- n++;
- buffer[n] = 0;
- }
- if (divisor != 1) {
- memmove(buffer + n - 2, buffer + n - 3, 4);
- buffer[n-2] = '.';
- n++;
- }
- return n;
-}
-
-void decode_numa_list(int *numa, char *t)
-{
- int node;
- int nr;
-
- memset(numa, 0, MAX_NODES * sizeof(int));
-
- if (!t)
- return;
-
- while (*t == 'N') {
- t++;
- node = strtoul(t, &t, 10);
- if (*t == '=') {
- t++;
- nr = strtoul(t, &t, 10);
- numa[node] = nr;
- if (node > highest_node)
- highest_node = node;
- }
- while (*t == ' ')
- t++;
- }
-}
-
-void slab_validate(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "validate", 1);
-}
-
-void slab_shrink(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "shrink", 1);
-}
-
-int line = 0;
-
-void first_line(void)
-{
- if (show_activity)
- printf("Name Objects Alloc Free %%Fill %%New "
- "FlushR %%FlushR FlushR_Objs O\n");
- else
- printf("Name Objects Objsize Space "
- " O/S O %%Ef Batch Flg\n");
-}
-
-unsigned long slab_size(struct slabinfo *s)
-{
- return s->slabs * (page_size << s->order);
-}
-
-unsigned long slab_activity(struct slabinfo *s)
-{
- return s->alloc + s->free;
-}
-
-void slab_numa(struct slabinfo *s, int mode)
-{
- int node;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (!highest_node) {
- printf("\n%s: No NUMA information available.\n", s->name);
- return;
- }
-
- if (skip_zero && !s->slabs)
- return;
-
- if (!line) {
- printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
- for(node = 0; node <= highest_node; node++)
- printf(" %4d", node);
- printf("\n----------------------");
- for(node = 0; node <= highest_node; node++)
- printf("-----");
- printf("\n");
- }
- printf("%-21s ", mode ? "All slabs" : s->name);
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa[node]);
- printf(" %4s", b);
- }
- printf("\n");
- if (mode) {
- printf("%-21s ", "Partial slabs");
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa_partial[node]);
- printf(" %4s", b);
- }
- printf("\n");
- }
- line++;
-}
-
-void show_tracking(struct slabinfo *s)
-{
- printf("\n%s: Kernel object allocation\n", s->name);
- printf("-----------------------------------------------------------------------\n");
- if (read_slab_obj(s, "alloc_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
- printf("\n%s: Kernel object freeing\n", s->name);
- printf("------------------------------------------------------------------------\n");
- if (read_slab_obj(s, "free_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
-}
-
-void ops(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (read_slab_obj(s, "ops")) {
- printf("\n%s: kmem_cache operations\n", s->name);
- printf("--------------------------------------------\n");
- printf(buffer);
- } else
- printf("\n%s has no kmem_cache operations\n", s->name);
-}
-
-const char *onoff(int x)
-{
- if (x)
- return "On ";
- return "Off";
-}
-
-void slab_stats(struct slabinfo *s)
-{
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc;
- total_free = s->free;
-
- if (!total_alloc)
- return;
-
- printf("\n");
- printf("Slab Perf Counter\n");
- printf("------------------------------------------------------------------------\n");
- printf("Alloc: %8lu, partial %8lu, page allocator %8lu\n",
- total_alloc,
- s->alloc_slab_fill, s->alloc_slab_new);
- printf("Free: %8lu, partial %8lu, page allocator %8lu, remote %5lu\n",
- total_free,
- s->flush_slab_partial,
- s->flush_slab_free,
- s->free_remote);
- printf("Claim: %8lu, objects %8lu\n",
- s->claim_remote_list,
- s->claim_remote_list_objects);
- printf("Flush: %8lu, objects %8lu, remote: %8lu\n",
- s->flush_free_list,
- s->flush_free_list_objects,
- s->flush_free_list_remote);
- printf("FlushR:%8lu, objects %8lu\n",
- s->flush_rfree_list,
- s->flush_rfree_list_objects);
-}
-
-void report(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- printf("\nSlabcache: %-20s Order : %2d Objects: %lu\n",
- s->name, s->order, s->objects);
- if (s->hwcache_align)
- printf("** Hardware cacheline aligned\n");
- if (s->cache_dma)
- printf("** Memory is allocated in a special DMA zone\n");
- if (s->destroy_by_rcu)
- printf("** Slabs are destroyed via RCU\n");
- if (s->reclaim_account)
- printf("** Reclaim accounting active\n");
-
- printf("\nSizes (bytes) Slabs Debug Memory\n");
- printf("------------------------------------------------------------------------\n");
- printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
- s->object_size, s->slabs, "N/A",
- s->slabs * (page_size << s->order));
- printf("SlabObj: %7d Full : %7s Redzoning : %s Used : %7ld\n",
- s->slab_size, "N/A",
- onoff(s->red_zone), s->objects * s->object_size);
- printf("SlabSiz: %7d Partial: %7s Poisoning : %s Loss : %7ld\n",
- page_size << s->order, "N/A", onoff(s->poison),
- s->slabs * (page_size << s->order) - s->objects * s->object_size);
- printf("Loss : %7d CpuSlab: %7s Tracking : %s Lalig: %7ld\n",
- s->slab_size - s->object_size, "N/A", onoff(s->store_user),
- (s->slab_size - s->object_size) * s->objects);
- printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
- s->align, s->objs_per_slab, "N/A",
- ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
- s->slabs);
-
- ops(s);
- show_tracking(s);
- slab_numa(s, 1);
- slab_stats(s);
-}
-
-void slabcache(struct slabinfo *s)
-{
- char size_str[20];
- char flags[20];
- char *p = flags;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (actual_slabs == 1) {
- report(s);
- return;
- }
-
- if (skip_zero && !show_empty && !s->slabs)
- return;
-
- if (show_empty && s->slabs)
- return;
-
- store_size(size_str, slab_size(s));
-
- if (!line++)
- first_line();
-
- if (s->cache_dma)
- *p++ = 'd';
- if (s->hwcache_align)
- *p++ = 'A';
- if (s->poison)
- *p++ = 'P';
- if (s->reclaim_account)
- *p++ = 'a';
- if (s->red_zone)
- *p++ = 'Z';
- if (s->store_user)
- *p++ = 'U';
-
- *p = 0;
- if (show_activity) {
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc;
- total_free = s->free;
-
- printf("%-21s %8ld %10ld %10ld %5ld %5ld %7ld %5ld %7ld %8d\n",
- s->name, s->objects,
- total_alloc, total_free,
- total_alloc ? (s->alloc_slab_fill * 100 / total_alloc) : 0,
- total_alloc ? (s->alloc_slab_new * 100 / total_alloc) : 0,
- s->flush_rfree_list,
- s->flush_rfree_list * 100 / (total_alloc + total_free),
- s->flush_rfree_list_objects,
- s->order);
- }
- else
- printf("%-21s %8ld %7d %8s %4d %1d %3ld %4d %s\n",
- s->name, s->objects, s->object_size, size_str,
- s->objs_per_slab, s->order,
- s->slabs ? (s->objects * s->object_size * 100) /
- (s->slabs * (page_size << s->order)) : 100,
- s->batch, flags);
-}
-
-/*
- * Analyze debug options. Return false if something is amiss.
- */
-int debug_opt_scan(char *opt)
-{
- if (!opt || !opt[0] || strcmp(opt, "-") == 0)
- return 1;
-
- if (strcasecmp(opt, "a") == 0) {
- sanity = 1;
- poison = 1;
- redzone = 1;
- tracking = 1;
- return 1;
- }
-
- for ( ; *opt; opt++)
- switch (*opt) {
- case 'F' : case 'f':
- if (sanity)
- return 0;
- sanity = 1;
- break;
- case 'P' : case 'p':
- if (poison)
- return 0;
- poison = 1;
- break;
-
- case 'Z' : case 'z':
- if (redzone)
- return 0;
- redzone = 1;
- break;
-
- case 'U' : case 'u':
- if (tracking)
- return 0;
- tracking = 1;
- break;
-
- case 'T' : case 't':
- if (tracing)
- return 0;
- tracing = 1;
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-int slab_empty(struct slabinfo *s)
-{
- if (s->objects > 0)
- return 0;
-
- /*
- * We may still have slabs even if there are no objects. Shrinking will
- * remove them.
- */
- if (s->slabs != 0)
- set_obj(s, "shrink", 1);
-
- return 1;
-}
-
-void slab_debug(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (redzone && !s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 1);
- else
- fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
- }
- if (!redzone && s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 0);
- else
- fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
- }
- if (poison && !s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 1);
- else
- fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
- }
- if (!poison && s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 0);
- else
- fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
- }
- if (tracking && !s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 1);
- else
- fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
- }
- if (!tracking && s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 0);
- else
- fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
- }
-}
-
-void totals(void)
-{
- struct slabinfo *s;
-
- int used_slabs = 0;
- char b1[20], b2[20], b3[20], b4[20];
- unsigned long long max = 1ULL << 63;
-
- /* Object size */
- unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
-
- /* Number of slabs in a slab cache */
- unsigned long long min_slabs = max, max_slabs = 0,
- avg_slabs, total_slabs = 0;
-
- /* Size of the whole slab */
- unsigned long long min_size = max, max_size = 0,
- avg_size, total_size = 0;
-
- /* Bytes used for object storage in a slab */
- unsigned long long min_used = max, max_used = 0,
- avg_used, total_used = 0;
-
- /* Waste: Bytes used for alignment and padding */
- unsigned long long min_waste = max, max_waste = 0,
- avg_waste, total_waste = 0;
- /* Number of objects in a slab */
- unsigned long long min_objects = max, max_objects = 0,
- avg_objects, total_objects = 0;
- /* Waste per object */
- unsigned long long min_objwaste = max,
- max_objwaste = 0, avg_objwaste,
- total_objwaste = 0;
-
- /* Memory per object */
- unsigned long long min_memobj = max,
- max_memobj = 0, avg_memobj,
- total_objsize = 0;
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- unsigned long long size;
- unsigned long used;
- unsigned long long wasted;
- unsigned long long objwaste;
-
- if (!s->slabs || !s->objects)
- continue;
-
- used_slabs++;
-
- size = slab_size(s);
- used = s->objects * s->object_size;
- wasted = size - used;
- objwaste = s->slab_size - s->object_size;
-
- if (s->object_size < min_objsize)
- min_objsize = s->object_size;
- if (s->slabs < min_slabs)
- min_slabs = s->slabs;
- if (size < min_size)
- min_size = size;
- if (wasted < min_waste)
- min_waste = wasted;
- if (objwaste < min_objwaste)
- min_objwaste = objwaste;
- if (s->objects < min_objects)
- min_objects = s->objects;
- if (used < min_used)
- min_used = used;
- if (s->slab_size < min_memobj)
- min_memobj = s->slab_size;
-
- if (s->object_size > max_objsize)
- max_objsize = s->object_size;
- if (s->slabs > max_slabs)
- max_slabs = s->slabs;
- if (size > max_size)
- max_size = size;
- if (wasted > max_waste)
- max_waste = wasted;
- if (objwaste > max_objwaste)
- max_objwaste = objwaste;
- if (s->objects > max_objects)
- max_objects = s->objects;
- if (used > max_used)
- max_used = used;
- if (s->slab_size > max_memobj)
- max_memobj = s->slab_size;
-
- total_slabs += s->slabs;
- total_size += size;
- total_waste += wasted;
-
- total_objects += s->objects;
- total_used += used;
-
- total_objwaste += s->objects * objwaste;
- total_objsize += s->objects * s->slab_size;
- }
-
- if (!total_objects) {
- printf("No objects\n");
- return;
- }
- if (!used_slabs) {
- printf("No slabs\n");
- return;
- }
-
- /* Per slab averages */
- avg_slabs = total_slabs / used_slabs;
- avg_size = total_size / used_slabs;
- avg_waste = total_waste / used_slabs;
-
- avg_objects = total_objects / used_slabs;
- avg_used = total_used / used_slabs;
-
- /* Per object object sizes */
- avg_objsize = total_used / total_objects;
- avg_objwaste = total_objwaste / total_objects;
- avg_memobj = total_objsize / total_objects;
-
- printf("Slabcache Totals\n");
- printf("----------------\n");
- printf("Slabcaches : %3d Active: %3d\n",
- slabs, used_slabs);
-
- store_size(b1, total_size);store_size(b2, total_waste);
- store_size(b3, total_waste * 100 / total_used);
- printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
-
- store_size(b1, total_objects);
- printf("# Objects : %6s\n", b1);
-
- printf("\n");
- printf("Per Cache Average Min Max Total\n");
- printf("---------------------------------------------------------\n");
-
- store_size(b1, avg_objects);store_size(b2, min_objects);
- store_size(b3, max_objects);store_size(b4, total_objects);
- printf("#Objects %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_slabs);store_size(b2, min_slabs);
- store_size(b3, max_slabs);store_size(b4, total_slabs);
- printf("#Slabs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_size);store_size(b2, min_size);
- store_size(b3, max_size);store_size(b4, total_size);
- printf("Memory %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_used);store_size(b2, min_used);
- store_size(b3, max_used);store_size(b4, total_used);
- printf("Used %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_waste);store_size(b2, min_waste);
- store_size(b3, max_waste);store_size(b4, total_waste);
- printf("Loss %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- printf("\n");
- printf("Per Object Average Min Max\n");
- printf("---------------------------------------------\n");
-
- store_size(b1, avg_memobj);store_size(b2, min_memobj);
- store_size(b3, max_memobj);
- printf("Memory %10s %10s %10s\n",
- b1, b2, b3);
- store_size(b1, avg_objsize);store_size(b2, min_objsize);
- store_size(b3, max_objsize);
- printf("User %10s %10s %10s\n",
- b1, b2, b3);
-
- store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
- store_size(b3, max_objwaste);
- printf("Loss %10s %10s %10s\n",
- b1, b2, b3);
-}
-
-void sort_slabs(void)
-{
- struct slabinfo *s1,*s2;
-
- for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
- for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
- int result;
-
- if (sort_size)
- result = slab_size(s1) < slab_size(s2);
- else if (sort_active)
- result = slab_activity(s1) < slab_activity(s2);
- else
- result = strcasecmp(s1->name, s2->name);
-
- if (show_inverted)
- result = -result;
-
- if (result > 0) {
- struct slabinfo t;
-
- memcpy(&t, s1, sizeof(struct slabinfo));
- memcpy(s1, s2, sizeof(struct slabinfo));
- memcpy(s2, &t, sizeof(struct slabinfo));
- }
- }
- }
-}
-
-int slab_mismatch(char *slab)
-{
- return regexec(&pattern, slab, 0, NULL, 0);
-}
-
-void read_slab_dir(void)
-{
- DIR *dir;
- struct dirent *de;
- struct slabinfo *slab = slabinfo;
- char *t;
-
- if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
- fatal("SYSFS support for SLUB not active\n");
-
- dir = opendir(".");
- while ((de = readdir(dir))) {
- if (de->d_name[0] == '.' ||
- (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
- continue;
- switch (de->d_type) {
- case DT_DIR:
- if (chdir(de->d_name))
- fatal("Unable to access slab %s\n", slab->name);
- slab->name = strdup(de->d_name);
- slab->align = get_obj("align");
- slab->cache_dma = get_obj("cache_dma");
- slab->destroy_by_rcu = get_obj("destroy_by_rcu");
- slab->hwcache_align = get_obj("hwcache_align");
- slab->object_size = get_obj("object_size");
- slab->objects = get_obj("objects");
- slab->total_objects = get_obj("total_objects");
- slab->objs_per_slab = get_obj("objs_per_slab");
- slab->order = get_obj("order");
- slab->poison = get_obj("poison");
- slab->reclaim_account = get_obj("reclaim_account");
- slab->red_zone = get_obj("red_zone");
- slab->slab_size = get_obj("slab_size");
- slab->slabs = get_obj_and_str("slabs", &t);
- decode_numa_list(slab->numa, t);
- free(t);
- slab->store_user = get_obj("store_user");
- slab->batch = get_obj("batch");
- slab->alloc = get_obj("alloc");
- slab->alloc_slab_fill = get_obj("alloc_slab_fill");
- slab->alloc_slab_new = get_obj("alloc_slab_new");
- slab->free = get_obj("free");
- slab->free_remote = get_obj("free_remote");
- slab->claim_remote_list = get_obj("claim_remote_list");
- slab->claim_remote_list_objects = get_obj("claim_remote_list_objects");
- slab->flush_free_list = get_obj("flush_free_list");
- slab->flush_free_list_objects = get_obj("flush_free_list_objects");
- slab->flush_free_list_remote = get_obj("flush_free_list_remote");
- slab->flush_rfree_list = get_obj("flush_rfree_list");
- slab->flush_rfree_list_objects = get_obj("flush_rfree_list_objects");
- slab->flush_slab_free = get_obj("flush_slab_free");
- slab->flush_slab_partial = get_obj("flush_slab_partial");
-
- chdir("..");
- slab++;
- break;
- default :
- fatal("Unknown file type %lx\n", de->d_type);
- }
- }
- closedir(dir);
- slabs = slab - slabinfo;
- actual_slabs = slabs;
- if (slabs > MAX_SLABS)
- fatal("Too many slabs\n");
-}
-
-void output_slabs(void)
-{
- struct slabinfo *slab;
-
- for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
-
- if (show_numa)
- slab_numa(slab, 0);
- else if (show_track)
- show_tracking(slab);
- else if (validate)
- slab_validate(slab);
- else if (shrink)
- slab_shrink(slab);
- else if (set_debug)
- slab_debug(slab);
- else if (show_ops)
- ops(slab);
- else if (show_slab)
- slabcache(slab);
- else if (show_report)
- report(slab);
- }
-}
-
-struct option opts[] = {
- { "activity", 0, NULL, 'A' },
- { "debug", 2, NULL, 'd' },
- { "display-activity", 0, NULL, 'D' },
- { "empty", 0, NULL, 'e' },
- { "help", 0, NULL, 'h' },
- { "inverted", 0, NULL, 'i'},
- { "numa", 0, NULL, 'n' },
- { "ops", 0, NULL, 'o' },
- { "report", 0, NULL, 'r' },
- { "shrink", 0, NULL, 's' },
- { "slabs", 0, NULL, 'l' },
- { "track", 0, NULL, 't'},
- { "validate", 0, NULL, 'v' },
- { "zero", 0, NULL, 'z' },
- { "1ref", 0, NULL, '1'},
- { NULL, 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- int c;
- int err;
- char *pattern_source;
-
- page_size = getpagesize();
-
- while ((c = getopt_long(argc, argv, "Ad::Dehil1noprstvzTS",
- opts, NULL)) != -1)
- switch (c) {
- case 'A':
- sort_active = 1;
- break;
- case 'd':
- set_debug = 1;
- if (!debug_opt_scan(optarg))
- fatal("Invalid debug option '%s'\n", optarg);
- break;
- case 'D':
- show_activity = 1;
- break;
- case 'e':
- show_empty = 1;
- break;
- case 'h':
- usage();
- return 0;
- case 'i':
- show_inverted = 1;
- break;
- case 'n':
- show_numa = 1;
- break;
- case 'o':
- show_ops = 1;
- break;
- case 'r':
- show_report = 1;
- break;
- case 's':
- shrink = 1;
- break;
- case 'l':
- show_slab = 1;
- break;
- case 't':
- show_track = 1;
- break;
- case 'v':
- validate = 1;
- break;
- case 'z':
- skip_zero = 0;
- break;
- case 'T':
- show_totals = 1;
- break;
- case 'S':
- sort_size = 1;
- break;
-
- default:
- fatal("%s: Invalid option '%c'\n", argv[0], optopt);
-
- }
-
- if (!show_slab && !show_track && !show_report
- && !validate && !shrink && !set_debug && !show_ops)
- show_slab = 1;
-
- if (argc > optind)
- pattern_source = argv[optind];
- else
- pattern_source = ".*";
-
- err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
- if (err)
- fatal("%s: Invalid pattern '%s' code %d\n",
- argv[0], pattern_source, err);
- read_slab_dir();
- if (show_totals)
- totals();
- else {
- sort_slabs();
- output_slabs();
- }
- return 0;
-}
--- linux-mm.orig/Documentation/vm/slub.txt 2009-09-02 11:27:38.000000000 +0800
+++ linux-mm/Documentation/vm/slub.txt 2009-09-02 11:29:47.000000000 +0800
@@ -17,7 +17,7 @@ data and perform operation on the slabs.
slabs that have data in them. See "slabinfo -h" for more options when
running the command. slabinfo can be compiled with
-gcc -o slabinfo Documentation/vm/slabinfo.c
+gcc -o slabinfo tools/vm/slabinfo.c
Some of the modes of operation of slabinfo require that slub debugging
be enabled on the command line. F.e. no tracking information will be
--- linux-mm.orig/tools/vm/.gitignore 2009-09-02 11:27:38.000000000 +0800
+++ linux-mm/tools/vm/.gitignore 2009-09-02 11:29:47.000000000 +0800
@@ -1 +1,3 @@
page-types
+slabinfo
+slqbinfo
--- linux-mm.orig/tools/vm/Makefile 2009-09-02 11:27:38.000000000 +0800
+++ linux-mm/tools/vm/Makefile 2009-09-02 11:29:47.000000000 +0800
@@ -1,5 +1,5 @@
# List of programs to build
-hostprogs-y := page-types
+hostprogs-y := page-types slabinfo slqbinfo
# Tell kbuild to always build the programs
always := $(hostprogs-y)
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/slabinfo.c 2009-09-02 11:29:47.000000000 +0800
@@ -0,0 +1,1364 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ *
+ * Compile by:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+ char *name;
+ int alias;
+ int refs;
+ int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+ int hwcache_align, object_size, objs_per_slab;
+ int sanity_checks, slab_size, store_user, trace;
+ int order, poison, reclaim_account, red_zone;
+ unsigned long partial, objects, slabs, objects_partial, objects_total;
+ unsigned long alloc_fastpath, alloc_slowpath;
+ unsigned long free_fastpath, free_slowpath;
+ unsigned long free_frozen, free_add_partial, free_remove_partial;
+ unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
+ unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+ unsigned long deactivate_to_head, deactivate_to_tail;
+ unsigned long deactivate_remote_frees, order_fallback;
+ int numa[MAX_NODES];
+ int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+struct aliasinfo {
+ char *name;
+ char *ref;
+ struct slabinfo *slab;
+} aliasinfo[MAX_ALIASES];
+
+int slabs = 0;
+int actual_slabs = 0;
+int aliases = 0;
+int alias_targets = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_alias = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int show_first_alias = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_single_ref = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+static void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+static void usage(void)
+{
+ printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
+ "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+ "-a|--aliases Show aliases\n"
+ "-A|--activity Most active slabs first\n"
+ "-d<options>|--debug=<options> Set/Clear Debug options\n"
+ "-D|--display-active Switch line format to activity\n"
+ "-e|--empty Show empty slabs\n"
+ "-f|--first-alias Show first alias\n"
+ "-h|--help Show usage information\n"
+ "-i|--inverted Inverted list\n"
+ "-l|--slabs Show slabs\n"
+ "-n|--numa Show NUMA information\n"
+ "-o|--ops Show kmem_cache_ops\n"
+ "-s|--shrink Shrink slabs\n"
+ "-r|--report Detailed report on single slabs\n"
+ "-S|--Size Sort by size\n"
+ "-t|--tracking Show alloc/free information\n"
+ "-T|--Totals Show summary information\n"
+ "-v|--validate Validate slabs\n"
+ "-z|--zero Include empty slabs\n"
+ "-1|--1ref Single reference\n"
+ "\nValid debug options (FZPUT may be combined)\n"
+ "a / A Switch on all debug options (=FZUP)\n"
+ "- Switch off all debug options\n"
+ "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
+ "z / Z Redzoning\n"
+ "p / P Poisoning\n"
+ "u / U Tracking\n"
+ "t / T Tracing\n"
+ );
+}
+
+static unsigned long read_obj(const char *name)
+{
+ FILE *f = fopen(name, "r");
+
+ if (!f)
+ buffer[0] = 0;
+ else {
+ if (!fgets(buffer, sizeof(buffer), f))
+ buffer[0] = 0;
+ fclose(f);
+ if (buffer[strlen(buffer)] == '\n')
+ buffer[strlen(buffer)] = 0;
+ }
+ return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+static unsigned long get_obj(const char *name)
+{
+ if (!read_obj(name))
+ return 0;
+
+ return atol(buffer);
+}
+
+static unsigned long get_obj_and_str(const char *name, char **x)
+{
+ unsigned long result = 0;
+ char *p;
+
+ *x = NULL;
+
+ if (!read_obj(name)) {
+ x = NULL;
+ return 0;
+ }
+ result = strtoul(buffer, &p, 10);
+ while (*p == ' ')
+ p++;
+ if (*p)
+ *x = strdup(p);
+ return result;
+}
+
+static void set_obj(struct slabinfo *s, const char *name, int n)
+{
+ char x[100];
+ FILE *f;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "w");
+ if (!f)
+ fatal("Cannot write to %s\n", x);
+
+ fprintf(f, "%d\n", n);
+ fclose(f);
+}
+
+static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+ char x[100];
+ FILE *f;
+ size_t l;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "r");
+ if (!f) {
+ buffer[0] = 0;
+ l = 0;
+ } else {
+ l = fread(buffer, 1, sizeof(buffer), f);
+ buffer[l] = 0;
+ fclose(f);
+ }
+ return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+static int store_size(char *buffer, unsigned long value)
+{
+ unsigned long divisor = 1;
+ char trailer = 0;
+ int n;
+
+ if (value > 1000000000UL) {
+ divisor = 100000000UL;
+ trailer = 'G';
+ } else if (value > 1000000UL) {
+ divisor = 100000UL;
+ trailer = 'M';
+ } else if (value > 1000UL) {
+ divisor = 100;
+ trailer = 'K';
+ }
+
+ value /= divisor;
+ n = sprintf(buffer, "%ld",value);
+ if (trailer) {
+ buffer[n] = trailer;
+ n++;
+ buffer[n] = 0;
+ }
+ if (divisor != 1) {
+ memmove(buffer + n - 2, buffer + n - 3, 4);
+ buffer[n-2] = '.';
+ n++;
+ }
+ return n;
+}
+
+static void decode_numa_list(int *numa, char *t)
+{
+ int node;
+ int nr;
+
+ memset(numa, 0, MAX_NODES * sizeof(int));
+
+ if (!t)
+ return;
+
+ while (*t == 'N') {
+ t++;
+ node = strtoul(t, &t, 10);
+ if (*t == '=') {
+ t++;
+ nr = strtoul(t, &t, 10);
+ numa[node] = nr;
+ if (node > highest_node)
+ highest_node = node;
+ }
+ while (*t == ' ')
+ t++;
+ }
+}
+
+static void slab_validate(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "validate", 1);
+}
+
+static void slab_shrink(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+static void first_line(void)
+{
+ if (show_activity)
+ printf("Name Objects Alloc Free %%Fast Fallb O\n");
+ else
+ printf("Name Objects Objsize Space "
+ "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
+}
+
+/*
+ * Find the shortest alias of a slab
+ */
+static struct aliasinfo *find_one_alias(struct slabinfo *find)
+{
+ struct aliasinfo *a;
+ struct aliasinfo *best = NULL;
+
+ for(a = aliasinfo;a < aliasinfo + aliases; a++) {
+ if (a->slab == find &&
+ (!best || strlen(best->name) < strlen(a->name))) {
+ best = a;
+ if (strncmp(a->name,"kmall", 5) == 0)
+ return best;
+ }
+ }
+ return best;
+}
+
+static unsigned long slab_size(struct slabinfo *s)
+{
+ return s->slabs * (page_size << s->order);
+}
+
+static unsigned long slab_activity(struct slabinfo *s)
+{
+ return s->alloc_fastpath + s->free_fastpath +
+ s->alloc_slowpath + s->free_slowpath;
+}
+
+static void slab_numa(struct slabinfo *s, int mode)
+{
+ int node;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (!highest_node) {
+ printf("\n%s: No NUMA information available.\n", s->name);
+ return;
+ }
+
+ if (skip_zero && !s->slabs)
+ return;
+
+ if (!line) {
+ printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+ for(node = 0; node <= highest_node; node++)
+ printf(" %4d", node);
+ printf("\n----------------------");
+ for(node = 0; node <= highest_node; node++)
+ printf("-----");
+ printf("\n");
+ }
+ printf("%-21s ", mode ? "All slabs" : s->name);
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ if (mode) {
+ printf("%-21s ", "Partial slabs");
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa_partial[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ }
+ line++;
+}
+
+static void show_tracking(struct slabinfo *s)
+{
+ printf("\n%s: Kernel object allocation\n", s->name);
+ printf("-----------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "alloc_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+ printf("\n%s: Kernel object freeing\n", s->name);
+ printf("------------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "free_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+}
+
+static void ops(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (read_slab_obj(s, "ops")) {
+ printf("\n%s: kmem_cache operations\n", s->name);
+ printf("--------------------------------------------\n");
+ printf(buffer);
+ } else
+ printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+static const char *onoff(int x)
+{
+ if (x)
+ return "On ";
+ return "Off";
+}
+
+static void slab_stats(struct slabinfo *s)
+{
+ unsigned long total_alloc;
+ unsigned long total_free;
+ unsigned long total;
+
+ if (!s->alloc_slab)
+ return;
+
+ total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+ total_free = s->free_fastpath + s->free_slowpath;
+
+ if (!total_alloc)
+ return;
+
+ printf("\n");
+ printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
+ printf("--------------------------------------------------\n");
+ printf("Fastpath %8lu %8lu %3lu %3lu\n",
+ s->alloc_fastpath, s->free_fastpath,
+ s->alloc_fastpath * 100 / total_alloc,
+ s->free_fastpath * 100 / total_free);
+ printf("Slowpath %8lu %8lu %3lu %3lu\n",
+ total_alloc - s->alloc_fastpath, s->free_slowpath,
+ (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
+ s->free_slowpath * 100 / total_free);
+ printf("Page Alloc %8lu %8lu %3lu %3lu\n",
+ s->alloc_slab, s->free_slab,
+ s->alloc_slab * 100 / total_alloc,
+ s->free_slab * 100 / total_free);
+ printf("Add partial %8lu %8lu %3lu %3lu\n",
+ s->deactivate_to_head + s->deactivate_to_tail,
+ s->free_add_partial,
+ (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
+ s->free_add_partial * 100 / total_free);
+ printf("Remove partial %8lu %8lu %3lu %3lu\n",
+ s->alloc_from_partial, s->free_remove_partial,
+ s->alloc_from_partial * 100 / total_alloc,
+ s->free_remove_partial * 100 / total_free);
+
+ printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
+ s->deactivate_remote_frees, s->free_frozen,
+ s->deactivate_remote_frees * 100 / total_alloc,
+ s->free_frozen * 100 / total_free);
+
+ printf("Total %8lu %8lu\n\n", total_alloc, total_free);
+
+ if (s->cpuslab_flush)
+ printf("Flushes %8lu\n", s->cpuslab_flush);
+
+ if (s->alloc_refill)
+ printf("Refill %8lu\n", s->alloc_refill);
+
+ total = s->deactivate_full + s->deactivate_empty +
+ s->deactivate_to_head + s->deactivate_to_tail;
+
+ if (total)
+ printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
+ "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
+ s->deactivate_full, (s->deactivate_full * 100) / total,
+ s->deactivate_empty, (s->deactivate_empty * 100) / total,
+ s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
+ s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
+}
+
+static void report(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
+ s->name, s->aliases, s->order, s->objects);
+ if (s->hwcache_align)
+ printf("** Hardware cacheline aligned\n");
+ if (s->cache_dma)
+ printf("** Memory is allocated in a special DMA zone\n");
+ if (s->destroy_by_rcu)
+ printf("** Slabs are destroyed via RCU\n");
+ if (s->reclaim_account)
+ printf("** Reclaim accounting active\n");
+
+ printf("\nSizes (bytes) Slabs Debug Memory\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
+ s->object_size, s->slabs, onoff(s->sanity_checks),
+ s->slabs * (page_size << s->order));
+ printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
+ s->slab_size, s->slabs - s->partial - s->cpu_slabs,
+ onoff(s->red_zone), s->objects * s->object_size);
+ printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
+ page_size << s->order, s->partial, onoff(s->poison),
+ s->slabs * (page_size << s->order) - s->objects * s->object_size);
+ printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
+ s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
+ (s->slab_size - s->object_size) * s->objects);
+ printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
+ s->align, s->objs_per_slab, onoff(s->trace),
+ ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+ s->slabs);
+
+ ops(s);
+ show_tracking(s);
+ slab_numa(s, 1);
+ slab_stats(s);
+}
+
+static void slabcache(struct slabinfo *s)
+{
+ char size_str[20];
+ char dist_str[40];
+ char flags[20];
+ char *p = flags;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (actual_slabs == 1) {
+ report(s);
+ return;
+ }
+
+ if (skip_zero && !show_empty && !s->slabs)
+ return;
+
+ if (show_empty && s->slabs)
+ return;
+
+ store_size(size_str, slab_size(s));
+ snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
+ s->partial, s->cpu_slabs);
+
+ if (!line++)
+ first_line();
+
+ if (s->aliases)
+ *p++ = '*';
+ if (s->cache_dma)
+ *p++ = 'd';
+ if (s->hwcache_align)
+ *p++ = 'A';
+ if (s->poison)
+ *p++ = 'P';
+ if (s->reclaim_account)
+ *p++ = 'a';
+ if (s->red_zone)
+ *p++ = 'Z';
+ if (s->sanity_checks)
+ *p++ = 'F';
+ if (s->store_user)
+ *p++ = 'U';
+ if (s->trace)
+ *p++ = 'T';
+
+ *p = 0;
+ if (show_activity) {
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+ total_free = s->free_fastpath + s->free_slowpath;
+
+ printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
+ s->name, s->objects,
+ total_alloc, total_free,
+ total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
+ total_free ? (s->free_fastpath * 100 / total_free) : 0,
+ s->order_fallback, s->order);
+ }
+ else
+ printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
+ s->name, s->objects, s->object_size, size_str, dist_str,
+ s->objs_per_slab, s->order,
+ s->slabs ? (s->partial * 100) / s->slabs : 100,
+ s->slabs ? (s->objects * s->object_size * 100) /
+ (s->slabs * (page_size << s->order)) : 100,
+ flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+static int debug_opt_scan(char *opt)
+{
+ if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+ return 1;
+
+ if (strcasecmp(opt, "a") == 0) {
+ sanity = 1;
+ poison = 1;
+ redzone = 1;
+ tracking = 1;
+ return 1;
+ }
+
+ for ( ; *opt; opt++)
+ switch (*opt) {
+ case 'F' : case 'f':
+ if (sanity)
+ return 0;
+ sanity = 1;
+ break;
+ case 'P' : case 'p':
+ if (poison)
+ return 0;
+ poison = 1;
+ break;
+
+ case 'Z' : case 'z':
+ if (redzone)
+ return 0;
+ redzone = 1;
+ break;
+
+ case 'U' : case 'u':
+ if (tracking)
+ return 0;
+ tracking = 1;
+ break;
+
+ case 'T' : case 't':
+ if (tracing)
+ return 0;
+ tracing = 1;
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static int slab_empty(struct slabinfo *s)
+{
+ if (s->objects > 0)
+ return 0;
+
+ /*
+ * We may still have slabs even if there are no objects. Shrinking will
+ * remove them.
+ */
+ if (s->slabs != 0)
+ set_obj(s, "shrink", 1);
+
+ return 1;
+}
+
+static void slab_debug(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (sanity && !s->sanity_checks) {
+ set_obj(s, "sanity", 1);
+ }
+ if (!sanity && s->sanity_checks) {
+ if (slab_empty(s))
+ set_obj(s, "sanity", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
+ }
+ if (redzone && !s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+ }
+ if (!redzone && s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+ }
+ if (poison && !s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+ }
+ if (!poison && s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+ }
+ if (tracking && !s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+ }
+ if (!tracking && s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+ }
+ if (tracing && !s->trace) {
+ if (slabs == 1)
+ set_obj(s, "trace", 1);
+ else
+ fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
+ }
+ if (!tracing && s->trace)
+ set_obj(s, "trace", 1);
+}
+
+static void totals(void)
+{
+ struct slabinfo *s;
+
+ int used_slabs = 0;
+ char b1[20], b2[20], b3[20], b4[20];
+ unsigned long long max = 1ULL << 63;
+
+ /* Object size */
+ unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+ /* Number of partial slabs in a slabcache */
+ unsigned long long min_partial = max, max_partial = 0,
+ avg_partial, total_partial = 0;
+
+ /* Number of slabs in a slab cache */
+ unsigned long long min_slabs = max, max_slabs = 0,
+ avg_slabs, total_slabs = 0;
+
+ /* Size of the whole slab */
+ unsigned long long min_size = max, max_size = 0,
+ avg_size, total_size = 0;
+
+ /* Bytes used for object storage in a slab */
+ unsigned long long min_used = max, max_used = 0,
+ avg_used, total_used = 0;
+
+ /* Waste: Bytes used for alignment and padding */
+ unsigned long long min_waste = max, max_waste = 0,
+ avg_waste, total_waste = 0;
+ /* Number of objects in a slab */
+ unsigned long long min_objects = max, max_objects = 0,
+ avg_objects, total_objects = 0;
+ /* Waste per object */
+ unsigned long long min_objwaste = max,
+ max_objwaste = 0, avg_objwaste,
+ total_objwaste = 0;
+
+ /* Memory per object */
+ unsigned long long min_memobj = max,
+ max_memobj = 0, avg_memobj,
+ total_objsize = 0;
+
+ /* Percentage of partial slabs per slab */
+ unsigned long min_ppart = 100, max_ppart = 0,
+ avg_ppart, total_ppart = 0;
+
+ /* Number of objects in partial slabs */
+ unsigned long min_partobj = max, max_partobj = 0,
+ avg_partobj, total_partobj = 0;
+
+ /* Percentage of partial objects of all objects in a slab */
+ unsigned long min_ppartobj = 100, max_ppartobj = 0,
+ avg_ppartobj, total_ppartobj = 0;
+
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ unsigned long long size;
+ unsigned long used;
+ unsigned long long wasted;
+ unsigned long long objwaste;
+ unsigned long percentage_partial_slabs;
+ unsigned long percentage_partial_objs;
+
+ if (!s->slabs || !s->objects)
+ continue;
+
+ used_slabs++;
+
+ size = slab_size(s);
+ used = s->objects * s->object_size;
+ wasted = size - used;
+ objwaste = s->slab_size - s->object_size;
+
+ percentage_partial_slabs = s->partial * 100 / s->slabs;
+ if (percentage_partial_slabs > 100)
+ percentage_partial_slabs = 100;
+
+ percentage_partial_objs = s->objects_partial * 100
+ / s->objects;
+
+ if (percentage_partial_objs > 100)
+ percentage_partial_objs = 100;
+
+ if (s->object_size < min_objsize)
+ min_objsize = s->object_size;
+ if (s->partial < min_partial)
+ min_partial = s->partial;
+ if (s->slabs < min_slabs)
+ min_slabs = s->slabs;
+ if (size < min_size)
+ min_size = size;
+ if (wasted < min_waste)
+ min_waste = wasted;
+ if (objwaste < min_objwaste)
+ min_objwaste = objwaste;
+ if (s->objects < min_objects)
+ min_objects = s->objects;
+ if (used < min_used)
+ min_used = used;
+ if (s->objects_partial < min_partobj)
+ min_partobj = s->objects_partial;
+ if (percentage_partial_slabs < min_ppart)
+ min_ppart = percentage_partial_slabs;
+ if (percentage_partial_objs < min_ppartobj)
+ min_ppartobj = percentage_partial_objs;
+ if (s->slab_size < min_memobj)
+ min_memobj = s->slab_size;
+
+ if (s->object_size > max_objsize)
+ max_objsize = s->object_size;
+ if (s->partial > max_partial)
+ max_partial = s->partial;
+ if (s->slabs > max_slabs)
+ max_slabs = s->slabs;
+ if (size > max_size)
+ max_size = size;
+ if (wasted > max_waste)
+ max_waste = wasted;
+ if (objwaste > max_objwaste)
+ max_objwaste = objwaste;
+ if (s->objects > max_objects)
+ max_objects = s->objects;
+ if (used > max_used)
+ max_used = used;
+ if (s->objects_partial > max_partobj)
+ max_partobj = s->objects_partial;
+ if (percentage_partial_slabs > max_ppart)
+ max_ppart = percentage_partial_slabs;
+ if (percentage_partial_objs > max_ppartobj)
+ max_ppartobj = percentage_partial_objs;
+ if (s->slab_size > max_memobj)
+ max_memobj = s->slab_size;
+
+ total_partial += s->partial;
+ total_slabs += s->slabs;
+ total_size += size;
+ total_waste += wasted;
+
+ total_objects += s->objects;
+ total_used += used;
+ total_partobj += s->objects_partial;
+ total_ppart += percentage_partial_slabs;
+ total_ppartobj += percentage_partial_objs;
+
+ total_objwaste += s->objects * objwaste;
+ total_objsize += s->objects * s->slab_size;
+ }
+
+ if (!total_objects) {
+ printf("No objects\n");
+ return;
+ }
+ if (!used_slabs) {
+ printf("No slabs\n");
+ return;
+ }
+
+ /* Per slab averages */
+ avg_partial = total_partial / used_slabs;
+ avg_slabs = total_slabs / used_slabs;
+ avg_size = total_size / used_slabs;
+ avg_waste = total_waste / used_slabs;
+
+ avg_objects = total_objects / used_slabs;
+ avg_used = total_used / used_slabs;
+ avg_partobj = total_partobj / used_slabs;
+ avg_ppart = total_ppart / used_slabs;
+ avg_ppartobj = total_ppartobj / used_slabs;
+
+ /* Per object object sizes */
+ avg_objsize = total_used / total_objects;
+ avg_objwaste = total_objwaste / total_objects;
+ avg_partobj = total_partobj * 100 / total_objects;
+ avg_memobj = total_objsize / total_objects;
+
+ printf("Slabcache Totals\n");
+ printf("----------------\n");
+ printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
+ slabs, aliases, alias_targets, used_slabs);
+
+ store_size(b1, total_size);store_size(b2, total_waste);
+ store_size(b3, total_waste * 100 / total_used);
+ printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
+
+ store_size(b1, total_objects);store_size(b2, total_partobj);
+ store_size(b3, total_partobj * 100 / total_objects);
+ printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
+
+ printf("\n");
+ printf("Per Cache Average Min Max Total\n");
+ printf("---------------------------------------------------------\n");
+
+ store_size(b1, avg_objects);store_size(b2, min_objects);
+ store_size(b3, max_objects);store_size(b4, total_objects);
+ printf("#Objects %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_slabs);store_size(b2, min_slabs);
+ store_size(b3, max_slabs);store_size(b4, total_slabs);
+ printf("#Slabs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_partial);store_size(b2, min_partial);
+ store_size(b3, max_partial);store_size(b4, total_partial);
+ printf("#PartSlab %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+ store_size(b1, avg_ppart);store_size(b2, min_ppart);
+ store_size(b3, max_ppart);
+ store_size(b4, total_partial * 100 / total_slabs);
+ printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_partobj);store_size(b2, min_partobj);
+ store_size(b3, max_partobj);
+ store_size(b4, total_partobj);
+ printf("PartObjs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
+ store_size(b3, max_ppartobj);
+ store_size(b4, total_partobj * 100 / total_objects);
+ printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_size);store_size(b2, min_size);
+ store_size(b3, max_size);store_size(b4, total_size);
+ printf("Memory %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_used);store_size(b2, min_used);
+ store_size(b3, max_used);store_size(b4, total_used);
+ printf("Used %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_waste);store_size(b2, min_waste);
+ store_size(b3, max_waste);store_size(b4, total_waste);
+ printf("Loss %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ printf("\n");
+ printf("Per Object Average Min Max\n");
+ printf("---------------------------------------------\n");
+
+ store_size(b1, avg_memobj);store_size(b2, min_memobj);
+ store_size(b3, max_memobj);
+ printf("Memory %10s %10s %10s\n",
+ b1, b2, b3);
+ store_size(b1, avg_objsize);store_size(b2, min_objsize);
+ store_size(b3, max_objsize);
+ printf("User %10s %10s %10s\n",
+ b1, b2, b3);
+
+ store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+ store_size(b3, max_objwaste);
+ printf("Loss %10s %10s %10s\n",
+ b1, b2, b3);
+}
+
+static void sort_slabs(void)
+{
+ struct slabinfo *s1,*s2;
+
+ for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+ for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+ int result;
+
+ if (sort_size)
+ result = slab_size(s1) < slab_size(s2);
+ else if (sort_active)
+ result = slab_activity(s1) < slab_activity(s2);
+ else
+ result = strcasecmp(s1->name, s2->name);
+
+ if (show_inverted)
+ result = -result;
+
+ if (result > 0) {
+ struct slabinfo t;
+
+ memcpy(&t, s1, sizeof(struct slabinfo));
+ memcpy(s1, s2, sizeof(struct slabinfo));
+ memcpy(s2, &t, sizeof(struct slabinfo));
+ }
+ }
+ }
+}
+
+static void sort_aliases(void)
+{
+ struct aliasinfo *a1,*a2;
+
+ for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
+ for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
+ char *n1, *n2;
+
+ n1 = a1->name;
+ n2 = a2->name;
+ if (show_alias && !show_inverted) {
+ n1 = a1->ref;
+ n2 = a2->ref;
+ }
+ if (strcasecmp(n1, n2) > 0) {
+ struct aliasinfo t;
+
+ memcpy(&t, a1, sizeof(struct aliasinfo));
+ memcpy(a1, a2, sizeof(struct aliasinfo));
+ memcpy(a2, &t, sizeof(struct aliasinfo));
+ }
+ }
+ }
+}
+
+static void link_slabs(void)
+{
+ struct aliasinfo *a;
+ struct slabinfo *s;
+
+ for (a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+ for (s = slabinfo; s < slabinfo + slabs; s++)
+ if (strcmp(a->ref, s->name) == 0) {
+ a->slab = s;
+ s->refs++;
+ break;
+ }
+ if (s == slabinfo + slabs)
+ fatal("Unresolved alias %s\n", a->ref);
+ }
+}
+
+static void alias(void)
+{
+ struct aliasinfo *a;
+ char *active = NULL;
+
+ sort_aliases();
+ link_slabs();
+
+ for(a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+ if (!show_single_ref && a->slab->refs == 1)
+ continue;
+
+ if (!show_inverted) {
+ if (active) {
+ if (strcmp(a->slab->name, active) == 0) {
+ printf(" %s", a->name);
+ continue;
+ }
+ }
+ printf("\n%-12s <- %s", a->slab->name, a->name);
+ active = a->slab->name;
+ }
+ else
+ printf("%-20s -> %s\n", a->name, a->slab->name);
+ }
+ if (active)
+ printf("\n");
+}
+
+
+static void rename_slabs(void)
+{
+ struct slabinfo *s;
+ struct aliasinfo *a;
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ if (*s->name != ':')
+ continue;
+
+ if (s->refs > 1 && !show_first_alias)
+ continue;
+
+ a = find_one_alias(s);
+
+ if (a)
+ s->name = a->name;
+ else {
+ s->name = "*";
+ actual_slabs--;
+ }
+ }
+}
+
+static int slab_mismatch(char *slab)
+{
+ return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+static void read_slab_dir(void)
+{
+ DIR *dir;
+ struct dirent *de;
+ struct slabinfo *slab = slabinfo;
+ struct aliasinfo *alias = aliasinfo;
+ char *p;
+ char *t;
+ int count;
+
+ if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+ fatal("SYSFS support for SLUB not active\n");
+
+ dir = opendir(".");
+ while ((de = readdir(dir))) {
+ if (de->d_name[0] == '.' ||
+ (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+ continue;
+ switch (de->d_type) {
+ case DT_LNK:
+ alias->name = strdup(de->d_name);
+ count = readlink(de->d_name, buffer, sizeof(buffer));
+
+ if (count < 0)
+ fatal("Cannot read symlink %s\n", de->d_name);
+
+ buffer[count] = 0;
+ p = buffer + count;
+ while (p > buffer && p[-1] != '/')
+ p--;
+ alias->ref = strdup(p);
+ alias++;
+ break;
+ case DT_DIR:
+ if (chdir(de->d_name))
+ fatal("Unable to access slab %s\n", slab->name);
+ slab->name = strdup(de->d_name);
+ slab->alias = 0;
+ slab->refs = 0;
+ slab->aliases = get_obj("aliases");
+ slab->align = get_obj("align");
+ slab->cache_dma = get_obj("cache_dma");
+ slab->cpu_slabs = get_obj("cpu_slabs");
+ slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+ slab->hwcache_align = get_obj("hwcache_align");
+ slab->object_size = get_obj("object_size");
+ slab->objects = get_obj("objects");
+ slab->objects_partial = get_obj("objects_partial");
+ slab->objects_total = get_obj("objects_total");
+ slab->objs_per_slab = get_obj("objs_per_slab");
+ slab->order = get_obj("order");
+ slab->partial = get_obj("partial");
+ slab->partial = get_obj_and_str("partial", &t);
+ decode_numa_list(slab->numa_partial, t);
+ free(t);
+ slab->poison = get_obj("poison");
+ slab->reclaim_account = get_obj("reclaim_account");
+ slab->red_zone = get_obj("red_zone");
+ slab->sanity_checks = get_obj("sanity_checks");
+ slab->slab_size = get_obj("slab_size");
+ slab->slabs = get_obj_and_str("slabs", &t);
+ decode_numa_list(slab->numa, t);
+ free(t);
+ slab->store_user = get_obj("store_user");
+ slab->trace = get_obj("trace");
+ slab->alloc_fastpath = get_obj("alloc_fastpath");
+ slab->alloc_slowpath = get_obj("alloc_slowpath");
+ slab->free_fastpath = get_obj("free_fastpath");
+ slab->free_slowpath = get_obj("free_slowpath");
+ slab->free_frozen= get_obj("free_frozen");
+ slab->free_add_partial = get_obj("free_add_partial");
+ slab->free_remove_partial = get_obj("free_remove_partial");
+ slab->alloc_from_partial = get_obj("alloc_from_partial");
+ slab->alloc_slab = get_obj("alloc_slab");
+ slab->alloc_refill = get_obj("alloc_refill");
+ slab->free_slab = get_obj("free_slab");
+ slab->cpuslab_flush = get_obj("cpuslab_flush");
+ slab->deactivate_full = get_obj("deactivate_full");
+ slab->deactivate_empty = get_obj("deactivate_empty");
+ slab->deactivate_to_head = get_obj("deactivate_to_head");
+ slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+ slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+ slab->order_fallback = get_obj("order_fallback");
+ chdir("..");
+ if (slab->name[0] == ':')
+ alias_targets++;
+ slab++;
+ break;
+ default :
+ fatal("Unknown file type %lx\n", de->d_type);
+ }
+ }
+ closedir(dir);
+ slabs = slab - slabinfo;
+ actual_slabs = slabs;
+ aliases = alias - aliasinfo;
+ if (slabs > MAX_SLABS)
+ fatal("Too many slabs\n");
+ if (aliases > MAX_ALIASES)
+ fatal("Too many aliases\n");
+}
+
+static void output_slabs(void)
+{
+ struct slabinfo *slab;
+
+ for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+ if (slab->alias)
+ continue;
+
+
+ if (show_numa)
+ slab_numa(slab, 0);
+ else if (show_track)
+ show_tracking(slab);
+ else if (validate)
+ slab_validate(slab);
+ else if (shrink)
+ slab_shrink(slab);
+ else if (set_debug)
+ slab_debug(slab);
+ else if (show_ops)
+ ops(slab);
+ else if (show_slab)
+ slabcache(slab);
+ else if (show_report)
+ report(slab);
+ }
+}
+
+struct option opts[] = {
+ { "aliases", 0, NULL, 'a' },
+ { "activity", 0, NULL, 'A' },
+ { "debug", 2, NULL, 'd' },
+ { "display-activity", 0, NULL, 'D' },
+ { "empty", 0, NULL, 'e' },
+ { "first-alias", 0, NULL, 'f' },
+ { "help", 0, NULL, 'h' },
+ { "inverted", 0, NULL, 'i'},
+ { "numa", 0, NULL, 'n' },
+ { "ops", 0, NULL, 'o' },
+ { "report", 0, NULL, 'r' },
+ { "shrink", 0, NULL, 's' },
+ { "slabs", 0, NULL, 'l' },
+ { "track", 0, NULL, 't'},
+ { "validate", 0, NULL, 'v' },
+ { "zero", 0, NULL, 'z' },
+ { "1ref", 0, NULL, '1'},
+ { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int err;
+ char *pattern_source;
+
+ page_size = getpagesize();
+
+ while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
+ opts, NULL)) != -1)
+ switch (c) {
+ case '1':
+ show_single_ref = 1;
+ break;
+ case 'a':
+ show_alias = 1;
+ break;
+ case 'A':
+ sort_active = 1;
+ break;
+ case 'd':
+ set_debug = 1;
+ if (!debug_opt_scan(optarg))
+ fatal("Invalid debug option '%s'\n", optarg);
+ break;
+ case 'D':
+ show_activity = 1;
+ break;
+ case 'e':
+ show_empty = 1;
+ break;
+ case 'f':
+ show_first_alias = 1;
+ break;
+ case 'h':
+ usage();
+ return 0;
+ case 'i':
+ show_inverted = 1;
+ break;
+ case 'n':
+ show_numa = 1;
+ break;
+ case 'o':
+ show_ops = 1;
+ break;
+ case 'r':
+ show_report = 1;
+ break;
+ case 's':
+ shrink = 1;
+ break;
+ case 'l':
+ show_slab = 1;
+ break;
+ case 't':
+ show_track = 1;
+ break;
+ case 'v':
+ validate = 1;
+ break;
+ case 'z':
+ skip_zero = 0;
+ break;
+ case 'T':
+ show_totals = 1;
+ break;
+ case 'S':
+ sort_size = 1;
+ break;
+
+ default:
+ fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+ }
+
+ if (!show_slab && !show_alias && !show_track && !show_report
+ && !validate && !shrink && !set_debug && !show_ops)
+ show_slab = 1;
+
+ if (argc > optind)
+ pattern_source = argv[optind];
+ else
+ pattern_source = ".*";
+
+ err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+ if (err)
+ fatal("%s: Invalid pattern '%s' code %d\n",
+ argv[0], pattern_source, err);
+ read_slab_dir();
+ if (show_alias)
+ alias();
+ else
+ if (show_totals)
+ totals();
+ else {
+ link_slabs();
+ rename_slabs();
+ sort_slabs();
+ output_slabs();
+ }
+ return 0;
+}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/slqbinfo.c 2009-09-02 11:29:47.000000000 +0800
@@ -0,0 +1,1047 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ *
+ * Reworked by Lin Ming <ming.m.lin@intel.com> for SLQB
+ *
+ * Compile by:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+ char *name;
+ int align, cache_dma, destroy_by_rcu;
+ int hwcache_align, object_size, objs_per_slab;
+ int slab_size, store_user;
+ int order, poison, reclaim_account, red_zone;
+ int batch;
+ unsigned long objects, slabs, total_objects;
+ unsigned long alloc, alloc_slab_fill, alloc_slab_new;
+ unsigned long free, free_remote;
+ unsigned long claim_remote_list, claim_remote_list_objects;
+ unsigned long flush_free_list, flush_free_list_objects, flush_free_list_remote;
+ unsigned long flush_rfree_list, flush_rfree_list_objects;
+ unsigned long flush_slab_free, flush_slab_partial;
+ int numa[MAX_NODES];
+ int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+int slabs = 0;
+int actual_slabs = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+void usage(void)
+{
+ printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
+ "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+ "-A|--activity Most active slabs first\n"
+ "-d<options>|--debug=<options> Set/Clear Debug options\n"
+ "-D|--display-active Switch line format to activity\n"
+ "-e|--empty Show empty slabs\n"
+ "-h|--help Show usage information\n"
+ "-i|--inverted Inverted list\n"
+ "-l|--slabs Show slabs\n"
+ "-n|--numa Show NUMA information\n"
+ "-o|--ops Show kmem_cache_ops\n"
+ "-s|--shrink Shrink slabs\n"
+ "-r|--report Detailed report on single slabs\n"
+ "-S|--Size Sort by size\n"
+ "-t|--tracking Show alloc/free information\n"
+ "-T|--Totals Show summary information\n"
+ "-v|--validate Validate slabs\n"
+ "-z|--zero Include empty slabs\n"
+ "\nValid debug options (FZPUT may be combined)\n"
+ "a / A Switch on all debug options (=FZUP)\n"
+ "- Switch off all debug options\n"
+ "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
+ "z / Z Redzoning\n"
+ "p / P Poisoning\n"
+ "u / U Tracking\n"
+ "t / T Tracing\n"
+ );
+}
+
+unsigned long read_obj(const char *name)
+{
+ FILE *f = fopen(name, "r");
+
+ if (!f)
+ buffer[0] = 0;
+ else {
+ if (!fgets(buffer, sizeof(buffer), f))
+ buffer[0] = 0;
+ fclose(f);
+ if (buffer[strlen(buffer)] == '\n')
+ buffer[strlen(buffer)] = 0;
+ }
+ return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+unsigned long get_obj(const char *name)
+{
+ if (!read_obj(name))
+ return 0;
+
+ return atol(buffer);
+}
+
+unsigned long get_obj_and_str(const char *name, char **x)
+{
+ unsigned long result = 0;
+ char *p;
+
+ *x = NULL;
+
+ if (!read_obj(name)) {
+ x = NULL;
+ return 0;
+ }
+ result = strtoul(buffer, &p, 10);
+ while (*p == ' ')
+ p++;
+ if (*p)
+ *x = strdup(p);
+ return result;
+}
+
+void set_obj(struct slabinfo *s, const char *name, int n)
+{
+ char x[100];
+ FILE *f;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "w");
+ if (!f)
+ fatal("Cannot write to %s\n", x);
+
+ fprintf(f, "%d\n", n);
+ fclose(f);
+}
+
+unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+ char x[100];
+ FILE *f;
+ size_t l;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "r");
+ if (!f) {
+ buffer[0] = 0;
+ l = 0;
+ } else {
+ l = fread(buffer, 1, sizeof(buffer), f);
+ buffer[l] = 0;
+ fclose(f);
+ }
+ return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+int store_size(char *buffer, unsigned long value)
+{
+ unsigned long divisor = 1;
+ char trailer = 0;
+ int n;
+
+ if (value > 1000000000UL) {
+ divisor = 100000000UL;
+ trailer = 'G';
+ } else if (value > 1000000UL) {
+ divisor = 100000UL;
+ trailer = 'M';
+ } else if (value > 1000UL) {
+ divisor = 100;
+ trailer = 'K';
+ }
+
+ value /= divisor;
+ n = sprintf(buffer, "%ld",value);
+ if (trailer) {
+ buffer[n] = trailer;
+ n++;
+ buffer[n] = 0;
+ }
+ if (divisor != 1) {
+ memmove(buffer + n - 2, buffer + n - 3, 4);
+ buffer[n-2] = '.';
+ n++;
+ }
+ return n;
+}
+
+void decode_numa_list(int *numa, char *t)
+{
+ int node;
+ int nr;
+
+ memset(numa, 0, MAX_NODES * sizeof(int));
+
+ if (!t)
+ return;
+
+ while (*t == 'N') {
+ t++;
+ node = strtoul(t, &t, 10);
+ if (*t == '=') {
+ t++;
+ nr = strtoul(t, &t, 10);
+ numa[node] = nr;
+ if (node > highest_node)
+ highest_node = node;
+ }
+ while (*t == ' ')
+ t++;
+ }
+}
+
+void slab_validate(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "validate", 1);
+}
+
+void slab_shrink(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+void first_line(void)
+{
+ if (show_activity)
+ printf("Name Objects Alloc Free %%Fill %%New "
+ "FlushR %%FlushR FlushR_Objs O\n");
+ else
+ printf("Name Objects Objsize Space "
+ " O/S O %%Ef Batch Flg\n");
+}
+
+unsigned long slab_size(struct slabinfo *s)
+{
+ return s->slabs * (page_size << s->order);
+}
+
+unsigned long slab_activity(struct slabinfo *s)
+{
+ return s->alloc + s->free;
+}
+
+void slab_numa(struct slabinfo *s, int mode)
+{
+ int node;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (!highest_node) {
+ printf("\n%s: No NUMA information available.\n", s->name);
+ return;
+ }
+
+ if (skip_zero && !s->slabs)
+ return;
+
+ if (!line) {
+ printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+ for(node = 0; node <= highest_node; node++)
+ printf(" %4d", node);
+ printf("\n----------------------");
+ for(node = 0; node <= highest_node; node++)
+ printf("-----");
+ printf("\n");
+ }
+ printf("%-21s ", mode ? "All slabs" : s->name);
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ if (mode) {
+ printf("%-21s ", "Partial slabs");
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa_partial[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ }
+ line++;
+}
+
+void show_tracking(struct slabinfo *s)
+{
+ printf("\n%s: Kernel object allocation\n", s->name);
+ printf("-----------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "alloc_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+ printf("\n%s: Kernel object freeing\n", s->name);
+ printf("------------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "free_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+}
+
+void ops(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (read_slab_obj(s, "ops")) {
+ printf("\n%s: kmem_cache operations\n", s->name);
+ printf("--------------------------------------------\n");
+ printf(buffer);
+ } else
+ printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+const char *onoff(int x)
+{
+ if (x)
+ return "On ";
+ return "Off";
+}
+
+void slab_stats(struct slabinfo *s)
+{
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc;
+ total_free = s->free;
+
+ if (!total_alloc)
+ return;
+
+ printf("\n");
+ printf("Slab Perf Counter\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Alloc: %8lu, partial %8lu, page allocator %8lu\n",
+ total_alloc,
+ s->alloc_slab_fill, s->alloc_slab_new);
+ printf("Free: %8lu, partial %8lu, page allocator %8lu, remote %5lu\n",
+ total_free,
+ s->flush_slab_partial,
+ s->flush_slab_free,
+ s->free_remote);
+ printf("Claim: %8lu, objects %8lu\n",
+ s->claim_remote_list,
+ s->claim_remote_list_objects);
+ printf("Flush: %8lu, objects %8lu, remote: %8lu\n",
+ s->flush_free_list,
+ s->flush_free_list_objects,
+ s->flush_free_list_remote);
+ printf("FlushR:%8lu, objects %8lu\n",
+ s->flush_rfree_list,
+ s->flush_rfree_list_objects);
+}
+
+void report(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ printf("\nSlabcache: %-20s Order : %2d Objects: %lu\n",
+ s->name, s->order, s->objects);
+ if (s->hwcache_align)
+ printf("** Hardware cacheline aligned\n");
+ if (s->cache_dma)
+ printf("** Memory is allocated in a special DMA zone\n");
+ if (s->destroy_by_rcu)
+ printf("** Slabs are destroyed via RCU\n");
+ if (s->reclaim_account)
+ printf("** Reclaim accounting active\n");
+
+ printf("\nSizes (bytes) Slabs Debug Memory\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
+ s->object_size, s->slabs, "N/A",
+ s->slabs * (page_size << s->order));
+ printf("SlabObj: %7d Full : %7s Redzoning : %s Used : %7ld\n",
+ s->slab_size, "N/A",
+ onoff(s->red_zone), s->objects * s->object_size);
+ printf("SlabSiz: %7d Partial: %7s Poisoning : %s Loss : %7ld\n",
+ page_size << s->order, "N/A", onoff(s->poison),
+ s->slabs * (page_size << s->order) - s->objects * s->object_size);
+ printf("Loss : %7d CpuSlab: %7s Tracking : %s Lalig: %7ld\n",
+ s->slab_size - s->object_size, "N/A", onoff(s->store_user),
+ (s->slab_size - s->object_size) * s->objects);
+ printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
+ s->align, s->objs_per_slab, "N/A",
+ ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+ s->slabs);
+
+ ops(s);
+ show_tracking(s);
+ slab_numa(s, 1);
+ slab_stats(s);
+}
+
+void slabcache(struct slabinfo *s)
+{
+ char size_str[20];
+ char flags[20];
+ char *p = flags;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (actual_slabs == 1) {
+ report(s);
+ return;
+ }
+
+ if (skip_zero && !show_empty && !s->slabs)
+ return;
+
+ if (show_empty && s->slabs)
+ return;
+
+ store_size(size_str, slab_size(s));
+
+ if (!line++)
+ first_line();
+
+ if (s->cache_dma)
+ *p++ = 'd';
+ if (s->hwcache_align)
+ *p++ = 'A';
+ if (s->poison)
+ *p++ = 'P';
+ if (s->reclaim_account)
+ *p++ = 'a';
+ if (s->red_zone)
+ *p++ = 'Z';
+ if (s->store_user)
+ *p++ = 'U';
+
+ *p = 0;
+ if (show_activity) {
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc;
+ total_free = s->free;
+
+ printf("%-21s %8ld %10ld %10ld %5ld %5ld %7ld %5ld %7ld %8d\n",
+ s->name, s->objects,
+ total_alloc, total_free,
+ total_alloc ? (s->alloc_slab_fill * 100 / total_alloc) : 0,
+ total_alloc ? (s->alloc_slab_new * 100 / total_alloc) : 0,
+ s->flush_rfree_list,
+ s->flush_rfree_list * 100 / (total_alloc + total_free),
+ s->flush_rfree_list_objects,
+ s->order);
+ }
+ else
+ printf("%-21s %8ld %7d %8s %4d %1d %3ld %4d %s\n",
+ s->name, s->objects, s->object_size, size_str,
+ s->objs_per_slab, s->order,
+ s->slabs ? (s->objects * s->object_size * 100) /
+ (s->slabs * (page_size << s->order)) : 100,
+ s->batch, flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+int debug_opt_scan(char *opt)
+{
+ if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+ return 1;
+
+ if (strcasecmp(opt, "a") == 0) {
+ sanity = 1;
+ poison = 1;
+ redzone = 1;
+ tracking = 1;
+ return 1;
+ }
+
+ for ( ; *opt; opt++)
+ switch (*opt) {
+ case 'F' : case 'f':
+ if (sanity)
+ return 0;
+ sanity = 1;
+ break;
+ case 'P' : case 'p':
+ if (poison)
+ return 0;
+ poison = 1;
+ break;
+
+ case 'Z' : case 'z':
+ if (redzone)
+ return 0;
+ redzone = 1;
+ break;
+
+ case 'U' : case 'u':
+ if (tracking)
+ return 0;
+ tracking = 1;
+ break;
+
+ case 'T' : case 't':
+ if (tracing)
+ return 0;
+ tracing = 1;
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+int slab_empty(struct slabinfo *s)
+{
+ if (s->objects > 0)
+ return 0;
+
+ /*
+ * We may still have slabs even if there are no objects. Shrinking will
+ * remove them.
+ */
+ if (s->slabs != 0)
+ set_obj(s, "shrink", 1);
+
+ return 1;
+}
+
+void slab_debug(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (redzone && !s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+ }
+ if (!redzone && s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+ }
+ if (poison && !s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+ }
+ if (!poison && s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+ }
+ if (tracking && !s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+ }
+ if (!tracking && s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+ }
+}
+
+void totals(void)
+{
+ struct slabinfo *s;
+
+ int used_slabs = 0;
+ char b1[20], b2[20], b3[20], b4[20];
+ unsigned long long max = 1ULL << 63;
+
+ /* Object size */
+ unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+ /* Number of slabs in a slab cache */
+ unsigned long long min_slabs = max, max_slabs = 0,
+ avg_slabs, total_slabs = 0;
+
+ /* Size of the whole slab */
+ unsigned long long min_size = max, max_size = 0,
+ avg_size, total_size = 0;
+
+ /* Bytes used for object storage in a slab */
+ unsigned long long min_used = max, max_used = 0,
+ avg_used, total_used = 0;
+
+ /* Waste: Bytes used for alignment and padding */
+ unsigned long long min_waste = max, max_waste = 0,
+ avg_waste, total_waste = 0;
+ /* Number of objects in a slab */
+ unsigned long long min_objects = max, max_objects = 0,
+ avg_objects, total_objects = 0;
+ /* Waste per object */
+ unsigned long long min_objwaste = max,
+ max_objwaste = 0, avg_objwaste,
+ total_objwaste = 0;
+
+ /* Memory per object */
+ unsigned long long min_memobj = max,
+ max_memobj = 0, avg_memobj,
+ total_objsize = 0;
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ unsigned long long size;
+ unsigned long used;
+ unsigned long long wasted;
+ unsigned long long objwaste;
+
+ if (!s->slabs || !s->objects)
+ continue;
+
+ used_slabs++;
+
+ size = slab_size(s);
+ used = s->objects * s->object_size;
+ wasted = size - used;
+ objwaste = s->slab_size - s->object_size;
+
+ if (s->object_size < min_objsize)
+ min_objsize = s->object_size;
+ if (s->slabs < min_slabs)
+ min_slabs = s->slabs;
+ if (size < min_size)
+ min_size = size;
+ if (wasted < min_waste)
+ min_waste = wasted;
+ if (objwaste < min_objwaste)
+ min_objwaste = objwaste;
+ if (s->objects < min_objects)
+ min_objects = s->objects;
+ if (used < min_used)
+ min_used = used;
+ if (s->slab_size < min_memobj)
+ min_memobj = s->slab_size;
+
+ if (s->object_size > max_objsize)
+ max_objsize = s->object_size;
+ if (s->slabs > max_slabs)
+ max_slabs = s->slabs;
+ if (size > max_size)
+ max_size = size;
+ if (wasted > max_waste)
+ max_waste = wasted;
+ if (objwaste > max_objwaste)
+ max_objwaste = objwaste;
+ if (s->objects > max_objects)
+ max_objects = s->objects;
+ if (used > max_used)
+ max_used = used;
+ if (s->slab_size > max_memobj)
+ max_memobj = s->slab_size;
+
+ total_slabs += s->slabs;
+ total_size += size;
+ total_waste += wasted;
+
+ total_objects += s->objects;
+ total_used += used;
+
+ total_objwaste += s->objects * objwaste;
+ total_objsize += s->objects * s->slab_size;
+ }
+
+ if (!total_objects) {
+ printf("No objects\n");
+ return;
+ }
+ if (!used_slabs) {
+ printf("No slabs\n");
+ return;
+ }
+
+ /* Per slab averages */
+ avg_slabs = total_slabs / used_slabs;
+ avg_size = total_size / used_slabs;
+ avg_waste = total_waste / used_slabs;
+
+ avg_objects = total_objects / used_slabs;
+ avg_used = total_used / used_slabs;
+
+ /* Per object object sizes */
+ avg_objsize = total_used / total_objects;
+ avg_objwaste = total_objwaste / total_objects;
+ avg_memobj = total_objsize / total_objects;
+
+ printf("Slabcache Totals\n");
+ printf("----------------\n");
+ printf("Slabcaches : %3d Active: %3d\n",
+ slabs, used_slabs);
+
+ store_size(b1, total_size);store_size(b2, total_waste);
+ store_size(b3, total_waste * 100 / total_used);
+ printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
+
+ store_size(b1, total_objects);
+ printf("# Objects : %6s\n", b1);
+
+ printf("\n");
+ printf("Per Cache Average Min Max Total\n");
+ printf("---------------------------------------------------------\n");
+
+ store_size(b1, avg_objects);store_size(b2, min_objects);
+ store_size(b3, max_objects);store_size(b4, total_objects);
+ printf("#Objects %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_slabs);store_size(b2, min_slabs);
+ store_size(b3, max_slabs);store_size(b4, total_slabs);
+ printf("#Slabs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_size);store_size(b2, min_size);
+ store_size(b3, max_size);store_size(b4, total_size);
+ printf("Memory %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_used);store_size(b2, min_used);
+ store_size(b3, max_used);store_size(b4, total_used);
+ printf("Used %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_waste);store_size(b2, min_waste);
+ store_size(b3, max_waste);store_size(b4, total_waste);
+ printf("Loss %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ printf("\n");
+ printf("Per Object Average Min Max\n");
+ printf("---------------------------------------------\n");
+
+ store_size(b1, avg_memobj);store_size(b2, min_memobj);
+ store_size(b3, max_memobj);
+ printf("Memory %10s %10s %10s\n",
+ b1, b2, b3);
+ store_size(b1, avg_objsize);store_size(b2, min_objsize);
+ store_size(b3, max_objsize);
+ printf("User %10s %10s %10s\n",
+ b1, b2, b3);
+
+ store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+ store_size(b3, max_objwaste);
+ printf("Loss %10s %10s %10s\n",
+ b1, b2, b3);
+}
+
+void sort_slabs(void)
+{
+ struct slabinfo *s1,*s2;
+
+ for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+ for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+ int result;
+
+ if (sort_size)
+ result = slab_size(s1) < slab_size(s2);
+ else if (sort_active)
+ result = slab_activity(s1) < slab_activity(s2);
+ else
+ result = strcasecmp(s1->name, s2->name);
+
+ if (show_inverted)
+ result = -result;
+
+ if (result > 0) {
+ struct slabinfo t;
+
+ memcpy(&t, s1, sizeof(struct slabinfo));
+ memcpy(s1, s2, sizeof(struct slabinfo));
+ memcpy(s2, &t, sizeof(struct slabinfo));
+ }
+ }
+ }
+}
+
+int slab_mismatch(char *slab)
+{
+ return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+void read_slab_dir(void)
+{
+ DIR *dir;
+ struct dirent *de;
+ struct slabinfo *slab = slabinfo;
+ char *t;
+
+ if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+ fatal("SYSFS support for SLUB not active\n");
+
+ dir = opendir(".");
+ while ((de = readdir(dir))) {
+ if (de->d_name[0] == '.' ||
+ (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+ continue;
+ switch (de->d_type) {
+ case DT_DIR:
+ if (chdir(de->d_name))
+ fatal("Unable to access slab %s\n", slab->name);
+ slab->name = strdup(de->d_name);
+ slab->align = get_obj("align");
+ slab->cache_dma = get_obj("cache_dma");
+ slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+ slab->hwcache_align = get_obj("hwcache_align");
+ slab->object_size = get_obj("object_size");
+ slab->objects = get_obj("objects");
+ slab->total_objects = get_obj("total_objects");
+ slab->objs_per_slab = get_obj("objs_per_slab");
+ slab->order = get_obj("order");
+ slab->poison = get_obj("poison");
+ slab->reclaim_account = get_obj("reclaim_account");
+ slab->red_zone = get_obj("red_zone");
+ slab->slab_size = get_obj("slab_size");
+ slab->slabs = get_obj_and_str("slabs", &t);
+ decode_numa_list(slab->numa, t);
+ free(t);
+ slab->store_user = get_obj("store_user");
+ slab->batch = get_obj("batch");
+ slab->alloc = get_obj("alloc");
+ slab->alloc_slab_fill = get_obj("alloc_slab_fill");
+ slab->alloc_slab_new = get_obj("alloc_slab_new");
+ slab->free = get_obj("free");
+ slab->free_remote = get_obj("free_remote");
+ slab->claim_remote_list = get_obj("claim_remote_list");
+ slab->claim_remote_list_objects = get_obj("claim_remote_list_objects");
+ slab->flush_free_list = get_obj("flush_free_list");
+ slab->flush_free_list_objects = get_obj("flush_free_list_objects");
+ slab->flush_free_list_remote = get_obj("flush_free_list_remote");
+ slab->flush_rfree_list = get_obj("flush_rfree_list");
+ slab->flush_rfree_list_objects = get_obj("flush_rfree_list_objects");
+ slab->flush_slab_free = get_obj("flush_slab_free");
+ slab->flush_slab_partial = get_obj("flush_slab_partial");
+
+ chdir("..");
+ slab++;
+ break;
+ default :
+ fatal("Unknown file type %lx\n", de->d_type);
+ }
+ }
+ closedir(dir);
+ slabs = slab - slabinfo;
+ actual_slabs = slabs;
+ if (slabs > MAX_SLABS)
+ fatal("Too many slabs\n");
+}
+
+void output_slabs(void)
+{
+ struct slabinfo *slab;
+
+ for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+ if (show_numa)
+ slab_numa(slab, 0);
+ else if (show_track)
+ show_tracking(slab);
+ else if (validate)
+ slab_validate(slab);
+ else if (shrink)
+ slab_shrink(slab);
+ else if (set_debug)
+ slab_debug(slab);
+ else if (show_ops)
+ ops(slab);
+ else if (show_slab)
+ slabcache(slab);
+ else if (show_report)
+ report(slab);
+ }
+}
+
+struct option opts[] = {
+ { "activity", 0, NULL, 'A' },
+ { "debug", 2, NULL, 'd' },
+ { "display-activity", 0, NULL, 'D' },
+ { "empty", 0, NULL, 'e' },
+ { "help", 0, NULL, 'h' },
+ { "inverted", 0, NULL, 'i'},
+ { "numa", 0, NULL, 'n' },
+ { "ops", 0, NULL, 'o' },
+ { "report", 0, NULL, 'r' },
+ { "shrink", 0, NULL, 's' },
+ { "slabs", 0, NULL, 'l' },
+ { "track", 0, NULL, 't'},
+ { "validate", 0, NULL, 'v' },
+ { "zero", 0, NULL, 'z' },
+ { "1ref", 0, NULL, '1'},
+ { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int err;
+ char *pattern_source;
+
+ page_size = getpagesize();
+
+ while ((c = getopt_long(argc, argv, "Ad::Dehil1noprstvzTS",
+ opts, NULL)) != -1)
+ switch (c) {
+ case 'A':
+ sort_active = 1;
+ break;
+ case 'd':
+ set_debug = 1;
+ if (!debug_opt_scan(optarg))
+ fatal("Invalid debug option '%s'\n", optarg);
+ break;
+ case 'D':
+ show_activity = 1;
+ break;
+ case 'e':
+ show_empty = 1;
+ break;
+ case 'h':
+ usage();
+ return 0;
+ case 'i':
+ show_inverted = 1;
+ break;
+ case 'n':
+ show_numa = 1;
+ break;
+ case 'o':
+ show_ops = 1;
+ break;
+ case 'r':
+ show_report = 1;
+ break;
+ case 's':
+ shrink = 1;
+ break;
+ case 'l':
+ show_slab = 1;
+ break;
+ case 't':
+ show_track = 1;
+ break;
+ case 'v':
+ validate = 1;
+ break;
+ case 'z':
+ skip_zero = 0;
+ break;
+ case 'T':
+ show_totals = 1;
+ break;
+ case 'S':
+ sort_size = 1;
+ break;
+
+ default:
+ fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+ }
+
+ if (!show_slab && !show_track && !show_report
+ && !validate && !shrink && !set_debug && !show_ops)
+ show_slab = 1;
+
+ if (argc > optind)
+ pattern_source = argv[optind];
+ else
+ pattern_source = ".*";
+
+ err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+ if (err)
+ fatal("%s: Invalid pattern '%s' code %d\n",
+ argv[0], pattern_source, err);
+ read_slab_dir();
+ if (show_totals)
+ totals();
+ else {
+ sort_slabs();
+ output_slabs();
+ }
+ return 0;
+}
--- linux-mm.orig/Documentation/vm/Makefile 2009-09-02 11:27:38.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,8 +0,0 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
-# List of programs to build
-hostprogs-y := slabinfo
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
--- linux-mm.orig/Documentation/vm/.gitignore 2009-09-02 11:31:30.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-slabinfo
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [RFC][PATCH 3/4] pagemap: export KPF_HWPOISON
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 1/4] page-types: move from " Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 2/4] slabinfo: " Wu Fengguang
@ 2009-09-02 3:41 ` Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 4/4] pagemap: document KPF_KSM and show it in page-types Wu Fengguang
3 siblings, 0 replies; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 3:41 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Andi Kleen, Wu Fengguang, Christoph Lameter,
KOSAKI Motohiro, Randy Dunlap, Chris Wright, Huang, Ying,
Lin Ming, Josh Triplett, Nick Piggin, linux-mm
[-- Attachment #1: kpageflags-hwpoison.patch --]
[-- Type: text/plain, Size: 2551 bytes --]
This flag indicates a hardware detected memory corruption on the page.
Any future access of the page data may bring down the machine.
CC: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Documentation/vm/pagemap.txt | 4 ++++
fs/proc/page.c | 5 +++++
tools/vm/page-types.c | 2 ++
3 files changed, 11 insertions(+)
--- linux-mm.orig/fs/proc/page.c 2009-08-31 13:58:19.000000000 +0800
+++ linux-mm/fs/proc/page.c 2009-08-31 14:59:08.000000000 +0800
@@ -94,6 +94,7 @@ static const struct file_operations proc
#define KPF_COMPOUND_TAIL 16
#define KPF_HUGE 17
#define KPF_UNEVICTABLE 18
+#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
#define KPF_KSM 21
@@ -180,6 +181,10 @@ static u64 get_uflags(struct page *page)
u |= kpf_copy_bit(k, KPF_UNEVICTABLE, PG_unevictable);
u |= kpf_copy_bit(k, KPF_MLOCKED, PG_mlocked);
+#ifdef CONFIG_MEMORY_FAILURE
+ u |= kpf_copy_bit(k, KPF_HWPOISON, PG_hwpoison);
+#endif
+
#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
u |= kpf_copy_bit(k, KPF_UNCACHED, PG_uncached);
#endif
--- linux-mm.orig/tools/vm/page-types.c 2009-08-31 13:58:19.000000000 +0800
+++ linux-mm/tools/vm/page-types.c 2009-08-31 14:59:08.000000000 +0800
@@ -47,6 +47,7 @@
#define KPF_COMPOUND_TAIL 16
#define KPF_HUGE 17
#define KPF_UNEVICTABLE 18
+#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
/* [32-] kernel hacking assistances */
@@ -94,6 +95,7 @@ static char *page_flag_names[] = {
[KPF_COMPOUND_TAIL] = "T:compound_tail",
[KPF_HUGE] = "G:huge",
[KPF_UNEVICTABLE] = "u:unevictable",
+ [KPF_HWPOISON] = "X:hwpoison",
[KPF_NOPAGE] = "n:nopage",
[KPF_RESERVED] = "r:reserved",
--- linux-mm.orig/Documentation/vm/pagemap.txt 2009-08-31 13:58:19.000000000 +0800
+++ linux-mm/Documentation/vm/pagemap.txt 2009-08-31 14:59:08.000000000 +0800
@@ -57,6 +57,7 @@ There are three components to pagemap:
16. COMPOUND_TAIL
16. HUGE
18. UNEVICTABLE
+ 19. HWPOISON
20. NOPAGE
Short descriptions to the page flags:
@@ -86,6 +87,9 @@ Short descriptions to the page flags:
17. HUGE
this is an integral part of a HugeTLB page
+19. HWPOISON
+ hardware detected memory corruption on this page: don't touch the data!
+
20. NOPAGE
no page frame exists at the requested address
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [RFC][PATCH 4/4] pagemap: document KPF_KSM and show it in page-types
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
` (2 preceding siblings ...)
2009-09-02 3:41 ` [RFC][PATCH 3/4] pagemap: export KPF_HWPOISON Wu Fengguang
@ 2009-09-02 3:41 ` Wu Fengguang
3 siblings, 0 replies; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 3:41 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Hugh Dickins, Izik Eidus, Chris Wright, Wu Fengguang,
Christoph Lameter, KOSAKI Motohiro, Randy Dunlap, Huang, Ying,
Lin Ming, Josh Triplett, Andi Kleen, Nick Piggin, linux-mm
[-- Attachment #1: kpageflags-ksm.patch --]
[-- Type: text/plain, Size: 1897 bytes --]
It indicates to the system admin that processes mapping such pages may be
eating less physical memory than the reported numbers by legacy tools.
CC: Hugh Dickins <hugh.dickins@tiscali.co.uk>
CC: Izik Eidus <ieidus@redhat.com>
Acked-by: Chris Wright <chrisw@redhat.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Documentation/vm/pagemap.txt | 4 ++++
tools/vm/page-types.c | 2 ++
2 files changed, 6 insertions(+)
--- linux-mm.orig/Documentation/vm/pagemap.txt 2009-08-31 15:02:55.000000000 +0800
+++ linux-mm/Documentation/vm/pagemap.txt 2009-09-01 15:54:36.000000000 +0800
@@ -59,6 +59,7 @@ There are three components to pagemap:
18. UNEVICTABLE
19. HWPOISON
20. NOPAGE
+ 21. KSM
Short descriptions to the page flags:
@@ -93,6 +94,9 @@ Short descriptions to the page flags:
20. NOPAGE
no page frame exists at the requested address
+21. KSM
+ identical memory pages dynamically shared between one or more processes
+
[IO related page flags]
1. ERROR IO error occurred
3. UPTODATE page has up-to-date data
--- linux-mm.orig/tools/vm/page-types.c 2009-08-31 15:00:24.000000000 +0800
+++ linux-mm/tools/vm/page-types.c 2009-09-01 15:54:16.000000000 +0800
@@ -49,6 +49,7 @@
#define KPF_UNEVICTABLE 18
#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
+#define KPF_KSM 21
/* [32-] kernel hacking assistances */
#define KPF_RESERVED 32
@@ -97,6 +98,7 @@ static char *page_flag_names[] = {
[KPF_UNEVICTABLE] = "u:unevictable",
[KPF_HWPOISON] = "X:hwpoison",
[KPF_NOPAGE] = "n:nopage",
+ [KPF_KSM] = "x:ksm",
[KPF_RESERVED] = "r:reserved",
[KPF_MLOCKED] = "m:mlocked",
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [RFC][PATCH 2/4 v2] slabinfo: move from Documentation/vm/ to tools/vm/
2009-09-02 3:41 ` [RFC][PATCH 2/4] slabinfo: " Wu Fengguang
@ 2009-09-02 4:17 ` Wu Fengguang
2009-09-02 18:04 ` Christoph Lameter
0 siblings, 1 reply; 7+ messages in thread
From: Wu Fengguang @ 2009-09-02 4:17 UTC (permalink / raw)
To: Andrew Morton
Cc: LKML, Lin, Ming M, Nick Piggin, Christoph Lameter,
KOSAKI Motohiro, Randy Dunlap, Chris Wright, Huang, Ying,
Josh Triplett, Andi Kleen, linux-mm@kvack.org
CC: Lin Ming <ming.m.lin@intel.com>
CC: Nick Piggin <nickpiggin@yahoo.com.au>
CC: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
Sorry, forgot to updated 00-INDEX -fengguang
Documentation/vm/.gitignore | 1
Documentation/vm/00-INDEX | 2
Documentation/vm/Makefile | 8
Documentation/vm/slabinfo.c | 1364 ----------------------------------
Documentation/vm/slqbinfo.c | 1047 --------------------------
Documentation/vm/slub.txt | 2
tools/vm/.gitignore | 2
tools/vm/Makefile | 2
tools/vm/slabinfo.c | 1364 ++++++++++++++++++++++++++++++++++
tools/vm/slqbinfo.c | 1047 ++++++++++++++++++++++++++
10 files changed, 2415 insertions(+), 2424 deletions(-)
--- linux-mm.orig/Documentation/vm/slabinfo.c 2009-09-02 12:14:09.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,1364 +0,0 @@
-/*
- * Slabinfo: Tool to get reports about slabs
- *
- * (C) 2007 sgi, Christoph Lameter
- *
- * Compile by:
- *
- * gcc -o slabinfo slabinfo.c
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <getopt.h>
-#include <regex.h>
-#include <errno.h>
-
-#define MAX_SLABS 500
-#define MAX_ALIASES 500
-#define MAX_NODES 1024
-
-struct slabinfo {
- char *name;
- int alias;
- int refs;
- int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
- int hwcache_align, object_size, objs_per_slab;
- int sanity_checks, slab_size, store_user, trace;
- int order, poison, reclaim_account, red_zone;
- unsigned long partial, objects, slabs, objects_partial, objects_total;
- unsigned long alloc_fastpath, alloc_slowpath;
- unsigned long free_fastpath, free_slowpath;
- unsigned long free_frozen, free_add_partial, free_remove_partial;
- unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
- unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
- unsigned long deactivate_to_head, deactivate_to_tail;
- unsigned long deactivate_remote_frees, order_fallback;
- int numa[MAX_NODES];
- int numa_partial[MAX_NODES];
-} slabinfo[MAX_SLABS];
-
-struct aliasinfo {
- char *name;
- char *ref;
- struct slabinfo *slab;
-} aliasinfo[MAX_ALIASES];
-
-int slabs = 0;
-int actual_slabs = 0;
-int aliases = 0;
-int alias_targets = 0;
-int highest_node = 0;
-
-char buffer[4096];
-
-int show_empty = 0;
-int show_report = 0;
-int show_alias = 0;
-int show_slab = 0;
-int skip_zero = 1;
-int show_numa = 0;
-int show_track = 0;
-int show_first_alias = 0;
-int validate = 0;
-int shrink = 0;
-int show_inverted = 0;
-int show_single_ref = 0;
-int show_totals = 0;
-int sort_size = 0;
-int sort_active = 0;
-int set_debug = 0;
-int show_ops = 0;
-int show_activity = 0;
-
-/* Debug options */
-int sanity = 0;
-int redzone = 0;
-int poison = 0;
-int tracking = 0;
-int tracing = 0;
-
-int page_size;
-
-regex_t pattern;
-
-static void fatal(const char *x, ...)
-{
- va_list ap;
-
- va_start(ap, x);
- vfprintf(stderr, x, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-static void usage(void)
-{
- printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
- "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
- "-a|--aliases Show aliases\n"
- "-A|--activity Most active slabs first\n"
- "-d<options>|--debug=<options> Set/Clear Debug options\n"
- "-D|--display-active Switch line format to activity\n"
- "-e|--empty Show empty slabs\n"
- "-f|--first-alias Show first alias\n"
- "-h|--help Show usage information\n"
- "-i|--inverted Inverted list\n"
- "-l|--slabs Show slabs\n"
- "-n|--numa Show NUMA information\n"
- "-o|--ops Show kmem_cache_ops\n"
- "-s|--shrink Shrink slabs\n"
- "-r|--report Detailed report on single slabs\n"
- "-S|--Size Sort by size\n"
- "-t|--tracking Show alloc/free information\n"
- "-T|--Totals Show summary information\n"
- "-v|--validate Validate slabs\n"
- "-z|--zero Include empty slabs\n"
- "-1|--1ref Single reference\n"
- "\nValid debug options (FZPUT may be combined)\n"
- "a / A Switch on all debug options (=FZUP)\n"
- "- Switch off all debug options\n"
- "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
- "z / Z Redzoning\n"
- "p / P Poisoning\n"
- "u / U Tracking\n"
- "t / T Tracing\n"
- );
-}
-
-static unsigned long read_obj(const char *name)
-{
- FILE *f = fopen(name, "r");
-
- if (!f)
- buffer[0] = 0;
- else {
- if (!fgets(buffer, sizeof(buffer), f))
- buffer[0] = 0;
- fclose(f);
- if (buffer[strlen(buffer)] == '\n')
- buffer[strlen(buffer)] = 0;
- }
- return strlen(buffer);
-}
-
-
-/*
- * Get the contents of an attribute
- */
-static unsigned long get_obj(const char *name)
-{
- if (!read_obj(name))
- return 0;
-
- return atol(buffer);
-}
-
-static unsigned long get_obj_and_str(const char *name, char **x)
-{
- unsigned long result = 0;
- char *p;
-
- *x = NULL;
-
- if (!read_obj(name)) {
- x = NULL;
- return 0;
- }
- result = strtoul(buffer, &p, 10);
- while (*p == ' ')
- p++;
- if (*p)
- *x = strdup(p);
- return result;
-}
-
-static void set_obj(struct slabinfo *s, const char *name, int n)
-{
- char x[100];
- FILE *f;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "w");
- if (!f)
- fatal("Cannot write to %s\n", x);
-
- fprintf(f, "%d\n", n);
- fclose(f);
-}
-
-static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
-{
- char x[100];
- FILE *f;
- size_t l;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "r");
- if (!f) {
- buffer[0] = 0;
- l = 0;
- } else {
- l = fread(buffer, 1, sizeof(buffer), f);
- buffer[l] = 0;
- fclose(f);
- }
- return l;
-}
-
-
-/*
- * Put a size string together
- */
-static int store_size(char *buffer, unsigned long value)
-{
- unsigned long divisor = 1;
- char trailer = 0;
- int n;
-
- if (value > 1000000000UL) {
- divisor = 100000000UL;
- trailer = 'G';
- } else if (value > 1000000UL) {
- divisor = 100000UL;
- trailer = 'M';
- } else if (value > 1000UL) {
- divisor = 100;
- trailer = 'K';
- }
-
- value /= divisor;
- n = sprintf(buffer, "%ld",value);
- if (trailer) {
- buffer[n] = trailer;
- n++;
- buffer[n] = 0;
- }
- if (divisor != 1) {
- memmove(buffer + n - 2, buffer + n - 3, 4);
- buffer[n-2] = '.';
- n++;
- }
- return n;
-}
-
-static void decode_numa_list(int *numa, char *t)
-{
- int node;
- int nr;
-
- memset(numa, 0, MAX_NODES * sizeof(int));
-
- if (!t)
- return;
-
- while (*t == 'N') {
- t++;
- node = strtoul(t, &t, 10);
- if (*t == '=') {
- t++;
- nr = strtoul(t, &t, 10);
- numa[node] = nr;
- if (node > highest_node)
- highest_node = node;
- }
- while (*t == ' ')
- t++;
- }
-}
-
-static void slab_validate(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "validate", 1);
-}
-
-static void slab_shrink(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "shrink", 1);
-}
-
-int line = 0;
-
-static void first_line(void)
-{
- if (show_activity)
- printf("Name Objects Alloc Free %%Fast Fallb O\n");
- else
- printf("Name Objects Objsize Space "
- "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
-}
-
-/*
- * Find the shortest alias of a slab
- */
-static struct aliasinfo *find_one_alias(struct slabinfo *find)
-{
- struct aliasinfo *a;
- struct aliasinfo *best = NULL;
-
- for(a = aliasinfo;a < aliasinfo + aliases; a++) {
- if (a->slab == find &&
- (!best || strlen(best->name) < strlen(a->name))) {
- best = a;
- if (strncmp(a->name,"kmall", 5) == 0)
- return best;
- }
- }
- return best;
-}
-
-static unsigned long slab_size(struct slabinfo *s)
-{
- return s->slabs * (page_size << s->order);
-}
-
-static unsigned long slab_activity(struct slabinfo *s)
-{
- return s->alloc_fastpath + s->free_fastpath +
- s->alloc_slowpath + s->free_slowpath;
-}
-
-static void slab_numa(struct slabinfo *s, int mode)
-{
- int node;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (!highest_node) {
- printf("\n%s: No NUMA information available.\n", s->name);
- return;
- }
-
- if (skip_zero && !s->slabs)
- return;
-
- if (!line) {
- printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
- for(node = 0; node <= highest_node; node++)
- printf(" %4d", node);
- printf("\n----------------------");
- for(node = 0; node <= highest_node; node++)
- printf("-----");
- printf("\n");
- }
- printf("%-21s ", mode ? "All slabs" : s->name);
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa[node]);
- printf(" %4s", b);
- }
- printf("\n");
- if (mode) {
- printf("%-21s ", "Partial slabs");
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa_partial[node]);
- printf(" %4s", b);
- }
- printf("\n");
- }
- line++;
-}
-
-static void show_tracking(struct slabinfo *s)
-{
- printf("\n%s: Kernel object allocation\n", s->name);
- printf("-----------------------------------------------------------------------\n");
- if (read_slab_obj(s, "alloc_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
- printf("\n%s: Kernel object freeing\n", s->name);
- printf("------------------------------------------------------------------------\n");
- if (read_slab_obj(s, "free_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
-}
-
-static void ops(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (read_slab_obj(s, "ops")) {
- printf("\n%s: kmem_cache operations\n", s->name);
- printf("--------------------------------------------\n");
- printf(buffer);
- } else
- printf("\n%s has no kmem_cache operations\n", s->name);
-}
-
-static const char *onoff(int x)
-{
- if (x)
- return "On ";
- return "Off";
-}
-
-static void slab_stats(struct slabinfo *s)
-{
- unsigned long total_alloc;
- unsigned long total_free;
- unsigned long total;
-
- if (!s->alloc_slab)
- return;
-
- total_alloc = s->alloc_fastpath + s->alloc_slowpath;
- total_free = s->free_fastpath + s->free_slowpath;
-
- if (!total_alloc)
- return;
-
- printf("\n");
- printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
- printf("--------------------------------------------------\n");
- printf("Fastpath %8lu %8lu %3lu %3lu\n",
- s->alloc_fastpath, s->free_fastpath,
- s->alloc_fastpath * 100 / total_alloc,
- s->free_fastpath * 100 / total_free);
- printf("Slowpath %8lu %8lu %3lu %3lu\n",
- total_alloc - s->alloc_fastpath, s->free_slowpath,
- (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
- s->free_slowpath * 100 / total_free);
- printf("Page Alloc %8lu %8lu %3lu %3lu\n",
- s->alloc_slab, s->free_slab,
- s->alloc_slab * 100 / total_alloc,
- s->free_slab * 100 / total_free);
- printf("Add partial %8lu %8lu %3lu %3lu\n",
- s->deactivate_to_head + s->deactivate_to_tail,
- s->free_add_partial,
- (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
- s->free_add_partial * 100 / total_free);
- printf("Remove partial %8lu %8lu %3lu %3lu\n",
- s->alloc_from_partial, s->free_remove_partial,
- s->alloc_from_partial * 100 / total_alloc,
- s->free_remove_partial * 100 / total_free);
-
- printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
- s->deactivate_remote_frees, s->free_frozen,
- s->deactivate_remote_frees * 100 / total_alloc,
- s->free_frozen * 100 / total_free);
-
- printf("Total %8lu %8lu\n\n", total_alloc, total_free);
-
- if (s->cpuslab_flush)
- printf("Flushes %8lu\n", s->cpuslab_flush);
-
- if (s->alloc_refill)
- printf("Refill %8lu\n", s->alloc_refill);
-
- total = s->deactivate_full + s->deactivate_empty +
- s->deactivate_to_head + s->deactivate_to_tail;
-
- if (total)
- printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
- "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
- s->deactivate_full, (s->deactivate_full * 100) / total,
- s->deactivate_empty, (s->deactivate_empty * 100) / total,
- s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
- s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
-}
-
-static void report(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
- s->name, s->aliases, s->order, s->objects);
- if (s->hwcache_align)
- printf("** Hardware cacheline aligned\n");
- if (s->cache_dma)
- printf("** Memory is allocated in a special DMA zone\n");
- if (s->destroy_by_rcu)
- printf("** Slabs are destroyed via RCU\n");
- if (s->reclaim_account)
- printf("** Reclaim accounting active\n");
-
- printf("\nSizes (bytes) Slabs Debug Memory\n");
- printf("------------------------------------------------------------------------\n");
- printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
- s->object_size, s->slabs, onoff(s->sanity_checks),
- s->slabs * (page_size << s->order));
- printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
- s->slab_size, s->slabs - s->partial - s->cpu_slabs,
- onoff(s->red_zone), s->objects * s->object_size);
- printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
- page_size << s->order, s->partial, onoff(s->poison),
- s->slabs * (page_size << s->order) - s->objects * s->object_size);
- printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
- s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
- (s->slab_size - s->object_size) * s->objects);
- printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
- s->align, s->objs_per_slab, onoff(s->trace),
- ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
- s->slabs);
-
- ops(s);
- show_tracking(s);
- slab_numa(s, 1);
- slab_stats(s);
-}
-
-static void slabcache(struct slabinfo *s)
-{
- char size_str[20];
- char dist_str[40];
- char flags[20];
- char *p = flags;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (actual_slabs == 1) {
- report(s);
- return;
- }
-
- if (skip_zero && !show_empty && !s->slabs)
- return;
-
- if (show_empty && s->slabs)
- return;
-
- store_size(size_str, slab_size(s));
- snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
- s->partial, s->cpu_slabs);
-
- if (!line++)
- first_line();
-
- if (s->aliases)
- *p++ = '*';
- if (s->cache_dma)
- *p++ = 'd';
- if (s->hwcache_align)
- *p++ = 'A';
- if (s->poison)
- *p++ = 'P';
- if (s->reclaim_account)
- *p++ = 'a';
- if (s->red_zone)
- *p++ = 'Z';
- if (s->sanity_checks)
- *p++ = 'F';
- if (s->store_user)
- *p++ = 'U';
- if (s->trace)
- *p++ = 'T';
-
- *p = 0;
- if (show_activity) {
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc_fastpath + s->alloc_slowpath;
- total_free = s->free_fastpath + s->free_slowpath;
-
- printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
- s->name, s->objects,
- total_alloc, total_free,
- total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
- total_free ? (s->free_fastpath * 100 / total_free) : 0,
- s->order_fallback, s->order);
- }
- else
- printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
- s->name, s->objects, s->object_size, size_str, dist_str,
- s->objs_per_slab, s->order,
- s->slabs ? (s->partial * 100) / s->slabs : 100,
- s->slabs ? (s->objects * s->object_size * 100) /
- (s->slabs * (page_size << s->order)) : 100,
- flags);
-}
-
-/*
- * Analyze debug options. Return false if something is amiss.
- */
-static int debug_opt_scan(char *opt)
-{
- if (!opt || !opt[0] || strcmp(opt, "-") == 0)
- return 1;
-
- if (strcasecmp(opt, "a") == 0) {
- sanity = 1;
- poison = 1;
- redzone = 1;
- tracking = 1;
- return 1;
- }
-
- for ( ; *opt; opt++)
- switch (*opt) {
- case 'F' : case 'f':
- if (sanity)
- return 0;
- sanity = 1;
- break;
- case 'P' : case 'p':
- if (poison)
- return 0;
- poison = 1;
- break;
-
- case 'Z' : case 'z':
- if (redzone)
- return 0;
- redzone = 1;
- break;
-
- case 'U' : case 'u':
- if (tracking)
- return 0;
- tracking = 1;
- break;
-
- case 'T' : case 't':
- if (tracing)
- return 0;
- tracing = 1;
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-static int slab_empty(struct slabinfo *s)
-{
- if (s->objects > 0)
- return 0;
-
- /*
- * We may still have slabs even if there are no objects. Shrinking will
- * remove them.
- */
- if (s->slabs != 0)
- set_obj(s, "shrink", 1);
-
- return 1;
-}
-
-static void slab_debug(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (sanity && !s->sanity_checks) {
- set_obj(s, "sanity", 1);
- }
- if (!sanity && s->sanity_checks) {
- if (slab_empty(s))
- set_obj(s, "sanity", 0);
- else
- fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
- }
- if (redzone && !s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 1);
- else
- fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
- }
- if (!redzone && s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 0);
- else
- fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
- }
- if (poison && !s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 1);
- else
- fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
- }
- if (!poison && s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 0);
- else
- fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
- }
- if (tracking && !s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 1);
- else
- fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
- }
- if (!tracking && s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 0);
- else
- fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
- }
- if (tracing && !s->trace) {
- if (slabs == 1)
- set_obj(s, "trace", 1);
- else
- fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
- }
- if (!tracing && s->trace)
- set_obj(s, "trace", 1);
-}
-
-static void totals(void)
-{
- struct slabinfo *s;
-
- int used_slabs = 0;
- char b1[20], b2[20], b3[20], b4[20];
- unsigned long long max = 1ULL << 63;
-
- /* Object size */
- unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
-
- /* Number of partial slabs in a slabcache */
- unsigned long long min_partial = max, max_partial = 0,
- avg_partial, total_partial = 0;
-
- /* Number of slabs in a slab cache */
- unsigned long long min_slabs = max, max_slabs = 0,
- avg_slabs, total_slabs = 0;
-
- /* Size of the whole slab */
- unsigned long long min_size = max, max_size = 0,
- avg_size, total_size = 0;
-
- /* Bytes used for object storage in a slab */
- unsigned long long min_used = max, max_used = 0,
- avg_used, total_used = 0;
-
- /* Waste: Bytes used for alignment and padding */
- unsigned long long min_waste = max, max_waste = 0,
- avg_waste, total_waste = 0;
- /* Number of objects in a slab */
- unsigned long long min_objects = max, max_objects = 0,
- avg_objects, total_objects = 0;
- /* Waste per object */
- unsigned long long min_objwaste = max,
- max_objwaste = 0, avg_objwaste,
- total_objwaste = 0;
-
- /* Memory per object */
- unsigned long long min_memobj = max,
- max_memobj = 0, avg_memobj,
- total_objsize = 0;
-
- /* Percentage of partial slabs per slab */
- unsigned long min_ppart = 100, max_ppart = 0,
- avg_ppart, total_ppart = 0;
-
- /* Number of objects in partial slabs */
- unsigned long min_partobj = max, max_partobj = 0,
- avg_partobj, total_partobj = 0;
-
- /* Percentage of partial objects of all objects in a slab */
- unsigned long min_ppartobj = 100, max_ppartobj = 0,
- avg_ppartobj, total_ppartobj = 0;
-
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- unsigned long long size;
- unsigned long used;
- unsigned long long wasted;
- unsigned long long objwaste;
- unsigned long percentage_partial_slabs;
- unsigned long percentage_partial_objs;
-
- if (!s->slabs || !s->objects)
- continue;
-
- used_slabs++;
-
- size = slab_size(s);
- used = s->objects * s->object_size;
- wasted = size - used;
- objwaste = s->slab_size - s->object_size;
-
- percentage_partial_slabs = s->partial * 100 / s->slabs;
- if (percentage_partial_slabs > 100)
- percentage_partial_slabs = 100;
-
- percentage_partial_objs = s->objects_partial * 100
- / s->objects;
-
- if (percentage_partial_objs > 100)
- percentage_partial_objs = 100;
-
- if (s->object_size < min_objsize)
- min_objsize = s->object_size;
- if (s->partial < min_partial)
- min_partial = s->partial;
- if (s->slabs < min_slabs)
- min_slabs = s->slabs;
- if (size < min_size)
- min_size = size;
- if (wasted < min_waste)
- min_waste = wasted;
- if (objwaste < min_objwaste)
- min_objwaste = objwaste;
- if (s->objects < min_objects)
- min_objects = s->objects;
- if (used < min_used)
- min_used = used;
- if (s->objects_partial < min_partobj)
- min_partobj = s->objects_partial;
- if (percentage_partial_slabs < min_ppart)
- min_ppart = percentage_partial_slabs;
- if (percentage_partial_objs < min_ppartobj)
- min_ppartobj = percentage_partial_objs;
- if (s->slab_size < min_memobj)
- min_memobj = s->slab_size;
-
- if (s->object_size > max_objsize)
- max_objsize = s->object_size;
- if (s->partial > max_partial)
- max_partial = s->partial;
- if (s->slabs > max_slabs)
- max_slabs = s->slabs;
- if (size > max_size)
- max_size = size;
- if (wasted > max_waste)
- max_waste = wasted;
- if (objwaste > max_objwaste)
- max_objwaste = objwaste;
- if (s->objects > max_objects)
- max_objects = s->objects;
- if (used > max_used)
- max_used = used;
- if (s->objects_partial > max_partobj)
- max_partobj = s->objects_partial;
- if (percentage_partial_slabs > max_ppart)
- max_ppart = percentage_partial_slabs;
- if (percentage_partial_objs > max_ppartobj)
- max_ppartobj = percentage_partial_objs;
- if (s->slab_size > max_memobj)
- max_memobj = s->slab_size;
-
- total_partial += s->partial;
- total_slabs += s->slabs;
- total_size += size;
- total_waste += wasted;
-
- total_objects += s->objects;
- total_used += used;
- total_partobj += s->objects_partial;
- total_ppart += percentage_partial_slabs;
- total_ppartobj += percentage_partial_objs;
-
- total_objwaste += s->objects * objwaste;
- total_objsize += s->objects * s->slab_size;
- }
-
- if (!total_objects) {
- printf("No objects\n");
- return;
- }
- if (!used_slabs) {
- printf("No slabs\n");
- return;
- }
-
- /* Per slab averages */
- avg_partial = total_partial / used_slabs;
- avg_slabs = total_slabs / used_slabs;
- avg_size = total_size / used_slabs;
- avg_waste = total_waste / used_slabs;
-
- avg_objects = total_objects / used_slabs;
- avg_used = total_used / used_slabs;
- avg_partobj = total_partobj / used_slabs;
- avg_ppart = total_ppart / used_slabs;
- avg_ppartobj = total_ppartobj / used_slabs;
-
- /* Per object object sizes */
- avg_objsize = total_used / total_objects;
- avg_objwaste = total_objwaste / total_objects;
- avg_partobj = total_partobj * 100 / total_objects;
- avg_memobj = total_objsize / total_objects;
-
- printf("Slabcache Totals\n");
- printf("----------------\n");
- printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
- slabs, aliases, alias_targets, used_slabs);
-
- store_size(b1, total_size);store_size(b2, total_waste);
- store_size(b3, total_waste * 100 / total_used);
- printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
-
- store_size(b1, total_objects);store_size(b2, total_partobj);
- store_size(b3, total_partobj * 100 / total_objects);
- printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
-
- printf("\n");
- printf("Per Cache Average Min Max Total\n");
- printf("---------------------------------------------------------\n");
-
- store_size(b1, avg_objects);store_size(b2, min_objects);
- store_size(b3, max_objects);store_size(b4, total_objects);
- printf("#Objects %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_slabs);store_size(b2, min_slabs);
- store_size(b3, max_slabs);store_size(b4, total_slabs);
- printf("#Slabs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_partial);store_size(b2, min_partial);
- store_size(b3, max_partial);store_size(b4, total_partial);
- printf("#PartSlab %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
- store_size(b1, avg_ppart);store_size(b2, min_ppart);
- store_size(b3, max_ppart);
- store_size(b4, total_partial * 100 / total_slabs);
- printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_partobj);store_size(b2, min_partobj);
- store_size(b3, max_partobj);
- store_size(b4, total_partobj);
- printf("PartObjs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
- store_size(b3, max_ppartobj);
- store_size(b4, total_partobj * 100 / total_objects);
- printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_size);store_size(b2, min_size);
- store_size(b3, max_size);store_size(b4, total_size);
- printf("Memory %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_used);store_size(b2, min_used);
- store_size(b3, max_used);store_size(b4, total_used);
- printf("Used %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_waste);store_size(b2, min_waste);
- store_size(b3, max_waste);store_size(b4, total_waste);
- printf("Loss %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- printf("\n");
- printf("Per Object Average Min Max\n");
- printf("---------------------------------------------\n");
-
- store_size(b1, avg_memobj);store_size(b2, min_memobj);
- store_size(b3, max_memobj);
- printf("Memory %10s %10s %10s\n",
- b1, b2, b3);
- store_size(b1, avg_objsize);store_size(b2, min_objsize);
- store_size(b3, max_objsize);
- printf("User %10s %10s %10s\n",
- b1, b2, b3);
-
- store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
- store_size(b3, max_objwaste);
- printf("Loss %10s %10s %10s\n",
- b1, b2, b3);
-}
-
-static void sort_slabs(void)
-{
- struct slabinfo *s1,*s2;
-
- for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
- for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
- int result;
-
- if (sort_size)
- result = slab_size(s1) < slab_size(s2);
- else if (sort_active)
- result = slab_activity(s1) < slab_activity(s2);
- else
- result = strcasecmp(s1->name, s2->name);
-
- if (show_inverted)
- result = -result;
-
- if (result > 0) {
- struct slabinfo t;
-
- memcpy(&t, s1, sizeof(struct slabinfo));
- memcpy(s1, s2, sizeof(struct slabinfo));
- memcpy(s2, &t, sizeof(struct slabinfo));
- }
- }
- }
-}
-
-static void sort_aliases(void)
-{
- struct aliasinfo *a1,*a2;
-
- for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
- for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
- char *n1, *n2;
-
- n1 = a1->name;
- n2 = a2->name;
- if (show_alias && !show_inverted) {
- n1 = a1->ref;
- n2 = a2->ref;
- }
- if (strcasecmp(n1, n2) > 0) {
- struct aliasinfo t;
-
- memcpy(&t, a1, sizeof(struct aliasinfo));
- memcpy(a1, a2, sizeof(struct aliasinfo));
- memcpy(a2, &t, sizeof(struct aliasinfo));
- }
- }
- }
-}
-
-static void link_slabs(void)
-{
- struct aliasinfo *a;
- struct slabinfo *s;
-
- for (a = aliasinfo; a < aliasinfo + aliases; a++) {
-
- for (s = slabinfo; s < slabinfo + slabs; s++)
- if (strcmp(a->ref, s->name) == 0) {
- a->slab = s;
- s->refs++;
- break;
- }
- if (s == slabinfo + slabs)
- fatal("Unresolved alias %s\n", a->ref);
- }
-}
-
-static void alias(void)
-{
- struct aliasinfo *a;
- char *active = NULL;
-
- sort_aliases();
- link_slabs();
-
- for(a = aliasinfo; a < aliasinfo + aliases; a++) {
-
- if (!show_single_ref && a->slab->refs == 1)
- continue;
-
- if (!show_inverted) {
- if (active) {
- if (strcmp(a->slab->name, active) == 0) {
- printf(" %s", a->name);
- continue;
- }
- }
- printf("\n%-12s <- %s", a->slab->name, a->name);
- active = a->slab->name;
- }
- else
- printf("%-20s -> %s\n", a->name, a->slab->name);
- }
- if (active)
- printf("\n");
-}
-
-
-static void rename_slabs(void)
-{
- struct slabinfo *s;
- struct aliasinfo *a;
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- if (*s->name != ':')
- continue;
-
- if (s->refs > 1 && !show_first_alias)
- continue;
-
- a = find_one_alias(s);
-
- if (a)
- s->name = a->name;
- else {
- s->name = "*";
- actual_slabs--;
- }
- }
-}
-
-static int slab_mismatch(char *slab)
-{
- return regexec(&pattern, slab, 0, NULL, 0);
-}
-
-static void read_slab_dir(void)
-{
- DIR *dir;
- struct dirent *de;
- struct slabinfo *slab = slabinfo;
- struct aliasinfo *alias = aliasinfo;
- char *p;
- char *t;
- int count;
-
- if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
- fatal("SYSFS support for SLUB not active\n");
-
- dir = opendir(".");
- while ((de = readdir(dir))) {
- if (de->d_name[0] == '.' ||
- (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
- continue;
- switch (de->d_type) {
- case DT_LNK:
- alias->name = strdup(de->d_name);
- count = readlink(de->d_name, buffer, sizeof(buffer));
-
- if (count < 0)
- fatal("Cannot read symlink %s\n", de->d_name);
-
- buffer[count] = 0;
- p = buffer + count;
- while (p > buffer && p[-1] != '/')
- p--;
- alias->ref = strdup(p);
- alias++;
- break;
- case DT_DIR:
- if (chdir(de->d_name))
- fatal("Unable to access slab %s\n", slab->name);
- slab->name = strdup(de->d_name);
- slab->alias = 0;
- slab->refs = 0;
- slab->aliases = get_obj("aliases");
- slab->align = get_obj("align");
- slab->cache_dma = get_obj("cache_dma");
- slab->cpu_slabs = get_obj("cpu_slabs");
- slab->destroy_by_rcu = get_obj("destroy_by_rcu");
- slab->hwcache_align = get_obj("hwcache_align");
- slab->object_size = get_obj("object_size");
- slab->objects = get_obj("objects");
- slab->objects_partial = get_obj("objects_partial");
- slab->objects_total = get_obj("objects_total");
- slab->objs_per_slab = get_obj("objs_per_slab");
- slab->order = get_obj("order");
- slab->partial = get_obj("partial");
- slab->partial = get_obj_and_str("partial", &t);
- decode_numa_list(slab->numa_partial, t);
- free(t);
- slab->poison = get_obj("poison");
- slab->reclaim_account = get_obj("reclaim_account");
- slab->red_zone = get_obj("red_zone");
- slab->sanity_checks = get_obj("sanity_checks");
- slab->slab_size = get_obj("slab_size");
- slab->slabs = get_obj_and_str("slabs", &t);
- decode_numa_list(slab->numa, t);
- free(t);
- slab->store_user = get_obj("store_user");
- slab->trace = get_obj("trace");
- slab->alloc_fastpath = get_obj("alloc_fastpath");
- slab->alloc_slowpath = get_obj("alloc_slowpath");
- slab->free_fastpath = get_obj("free_fastpath");
- slab->free_slowpath = get_obj("free_slowpath");
- slab->free_frozen= get_obj("free_frozen");
- slab->free_add_partial = get_obj("free_add_partial");
- slab->free_remove_partial = get_obj("free_remove_partial");
- slab->alloc_from_partial = get_obj("alloc_from_partial");
- slab->alloc_slab = get_obj("alloc_slab");
- slab->alloc_refill = get_obj("alloc_refill");
- slab->free_slab = get_obj("free_slab");
- slab->cpuslab_flush = get_obj("cpuslab_flush");
- slab->deactivate_full = get_obj("deactivate_full");
- slab->deactivate_empty = get_obj("deactivate_empty");
- slab->deactivate_to_head = get_obj("deactivate_to_head");
- slab->deactivate_to_tail = get_obj("deactivate_to_tail");
- slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
- slab->order_fallback = get_obj("order_fallback");
- chdir("..");
- if (slab->name[0] == ':')
- alias_targets++;
- slab++;
- break;
- default :
- fatal("Unknown file type %lx\n", de->d_type);
- }
- }
- closedir(dir);
- slabs = slab - slabinfo;
- actual_slabs = slabs;
- aliases = alias - aliasinfo;
- if (slabs > MAX_SLABS)
- fatal("Too many slabs\n");
- if (aliases > MAX_ALIASES)
- fatal("Too many aliases\n");
-}
-
-static void output_slabs(void)
-{
- struct slabinfo *slab;
-
- for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
-
- if (slab->alias)
- continue;
-
-
- if (show_numa)
- slab_numa(slab, 0);
- else if (show_track)
- show_tracking(slab);
- else if (validate)
- slab_validate(slab);
- else if (shrink)
- slab_shrink(slab);
- else if (set_debug)
- slab_debug(slab);
- else if (show_ops)
- ops(slab);
- else if (show_slab)
- slabcache(slab);
- else if (show_report)
- report(slab);
- }
-}
-
-struct option opts[] = {
- { "aliases", 0, NULL, 'a' },
- { "activity", 0, NULL, 'A' },
- { "debug", 2, NULL, 'd' },
- { "display-activity", 0, NULL, 'D' },
- { "empty", 0, NULL, 'e' },
- { "first-alias", 0, NULL, 'f' },
- { "help", 0, NULL, 'h' },
- { "inverted", 0, NULL, 'i'},
- { "numa", 0, NULL, 'n' },
- { "ops", 0, NULL, 'o' },
- { "report", 0, NULL, 'r' },
- { "shrink", 0, NULL, 's' },
- { "slabs", 0, NULL, 'l' },
- { "track", 0, NULL, 't'},
- { "validate", 0, NULL, 'v' },
- { "zero", 0, NULL, 'z' },
- { "1ref", 0, NULL, '1'},
- { NULL, 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- int c;
- int err;
- char *pattern_source;
-
- page_size = getpagesize();
-
- while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
- opts, NULL)) != -1)
- switch (c) {
- case '1':
- show_single_ref = 1;
- break;
- case 'a':
- show_alias = 1;
- break;
- case 'A':
- sort_active = 1;
- break;
- case 'd':
- set_debug = 1;
- if (!debug_opt_scan(optarg))
- fatal("Invalid debug option '%s'\n", optarg);
- break;
- case 'D':
- show_activity = 1;
- break;
- case 'e':
- show_empty = 1;
- break;
- case 'f':
- show_first_alias = 1;
- break;
- case 'h':
- usage();
- return 0;
- case 'i':
- show_inverted = 1;
- break;
- case 'n':
- show_numa = 1;
- break;
- case 'o':
- show_ops = 1;
- break;
- case 'r':
- show_report = 1;
- break;
- case 's':
- shrink = 1;
- break;
- case 'l':
- show_slab = 1;
- break;
- case 't':
- show_track = 1;
- break;
- case 'v':
- validate = 1;
- break;
- case 'z':
- skip_zero = 0;
- break;
- case 'T':
- show_totals = 1;
- break;
- case 'S':
- sort_size = 1;
- break;
-
- default:
- fatal("%s: Invalid option '%c'\n", argv[0], optopt);
-
- }
-
- if (!show_slab && !show_alias && !show_track && !show_report
- && !validate && !shrink && !set_debug && !show_ops)
- show_slab = 1;
-
- if (argc > optind)
- pattern_source = argv[optind];
- else
- pattern_source = ".*";
-
- err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
- if (err)
- fatal("%s: Invalid pattern '%s' code %d\n",
- argv[0], pattern_source, err);
- read_slab_dir();
- if (show_alias)
- alias();
- else
- if (show_totals)
- totals();
- else {
- link_slabs();
- rename_slabs();
- sort_slabs();
- output_slabs();
- }
- return 0;
-}
--- linux-mm.orig/Documentation/vm/slqbinfo.c 2009-09-02 12:14:09.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,1047 +0,0 @@
-/*
- * Slabinfo: Tool to get reports about slabs
- *
- * (C) 2007 sgi, Christoph Lameter
- *
- * Reworked by Lin Ming <ming.m.lin@intel.com> for SLQB
- *
- * Compile by:
- *
- * gcc -o slabinfo slabinfo.c
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <getopt.h>
-#include <regex.h>
-#include <errno.h>
-
-#define MAX_SLABS 500
-#define MAX_ALIASES 500
-#define MAX_NODES 1024
-
-struct slabinfo {
- char *name;
- int align, cache_dma, destroy_by_rcu;
- int hwcache_align, object_size, objs_per_slab;
- int slab_size, store_user;
- int order, poison, reclaim_account, red_zone;
- int batch;
- unsigned long objects, slabs, total_objects;
- unsigned long alloc, alloc_slab_fill, alloc_slab_new;
- unsigned long free, free_remote;
- unsigned long claim_remote_list, claim_remote_list_objects;
- unsigned long flush_free_list, flush_free_list_objects, flush_free_list_remote;
- unsigned long flush_rfree_list, flush_rfree_list_objects;
- unsigned long flush_slab_free, flush_slab_partial;
- int numa[MAX_NODES];
- int numa_partial[MAX_NODES];
-} slabinfo[MAX_SLABS];
-
-int slabs = 0;
-int actual_slabs = 0;
-int highest_node = 0;
-
-char buffer[4096];
-
-int show_empty = 0;
-int show_report = 0;
-int show_slab = 0;
-int skip_zero = 1;
-int show_numa = 0;
-int show_track = 0;
-int validate = 0;
-int shrink = 0;
-int show_inverted = 0;
-int show_totals = 0;
-int sort_size = 0;
-int sort_active = 0;
-int set_debug = 0;
-int show_ops = 0;
-int show_activity = 0;
-
-/* Debug options */
-int sanity = 0;
-int redzone = 0;
-int poison = 0;
-int tracking = 0;
-int tracing = 0;
-
-int page_size;
-
-regex_t pattern;
-
-void fatal(const char *x, ...)
-{
- va_list ap;
-
- va_start(ap, x);
- vfprintf(stderr, x, ap);
- va_end(ap);
- exit(EXIT_FAILURE);
-}
-
-void usage(void)
-{
- printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
- "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
- "-A|--activity Most active slabs first\n"
- "-d<options>|--debug=<options> Set/Clear Debug options\n"
- "-D|--display-active Switch line format to activity\n"
- "-e|--empty Show empty slabs\n"
- "-h|--help Show usage information\n"
- "-i|--inverted Inverted list\n"
- "-l|--slabs Show slabs\n"
- "-n|--numa Show NUMA information\n"
- "-o|--ops Show kmem_cache_ops\n"
- "-s|--shrink Shrink slabs\n"
- "-r|--report Detailed report on single slabs\n"
- "-S|--Size Sort by size\n"
- "-t|--tracking Show alloc/free information\n"
- "-T|--Totals Show summary information\n"
- "-v|--validate Validate slabs\n"
- "-z|--zero Include empty slabs\n"
- "\nValid debug options (FZPUT may be combined)\n"
- "a / A Switch on all debug options (=FZUP)\n"
- "- Switch off all debug options\n"
- "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
- "z / Z Redzoning\n"
- "p / P Poisoning\n"
- "u / U Tracking\n"
- "t / T Tracing\n"
- );
-}
-
-unsigned long read_obj(const char *name)
-{
- FILE *f = fopen(name, "r");
-
- if (!f)
- buffer[0] = 0;
- else {
- if (!fgets(buffer, sizeof(buffer), f))
- buffer[0] = 0;
- fclose(f);
- if (buffer[strlen(buffer)] == '\n')
- buffer[strlen(buffer)] = 0;
- }
- return strlen(buffer);
-}
-
-
-/*
- * Get the contents of an attribute
- */
-unsigned long get_obj(const char *name)
-{
- if (!read_obj(name))
- return 0;
-
- return atol(buffer);
-}
-
-unsigned long get_obj_and_str(const char *name, char **x)
-{
- unsigned long result = 0;
- char *p;
-
- *x = NULL;
-
- if (!read_obj(name)) {
- x = NULL;
- return 0;
- }
- result = strtoul(buffer, &p, 10);
- while (*p == ' ')
- p++;
- if (*p)
- *x = strdup(p);
- return result;
-}
-
-void set_obj(struct slabinfo *s, const char *name, int n)
-{
- char x[100];
- FILE *f;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "w");
- if (!f)
- fatal("Cannot write to %s\n", x);
-
- fprintf(f, "%d\n", n);
- fclose(f);
-}
-
-unsigned long read_slab_obj(struct slabinfo *s, const char *name)
-{
- char x[100];
- FILE *f;
- size_t l;
-
- snprintf(x, 100, "%s/%s", s->name, name);
- f = fopen(x, "r");
- if (!f) {
- buffer[0] = 0;
- l = 0;
- } else {
- l = fread(buffer, 1, sizeof(buffer), f);
- buffer[l] = 0;
- fclose(f);
- }
- return l;
-}
-
-
-/*
- * Put a size string together
- */
-int store_size(char *buffer, unsigned long value)
-{
- unsigned long divisor = 1;
- char trailer = 0;
- int n;
-
- if (value > 1000000000UL) {
- divisor = 100000000UL;
- trailer = 'G';
- } else if (value > 1000000UL) {
- divisor = 100000UL;
- trailer = 'M';
- } else if (value > 1000UL) {
- divisor = 100;
- trailer = 'K';
- }
-
- value /= divisor;
- n = sprintf(buffer, "%ld",value);
- if (trailer) {
- buffer[n] = trailer;
- n++;
- buffer[n] = 0;
- }
- if (divisor != 1) {
- memmove(buffer + n - 2, buffer + n - 3, 4);
- buffer[n-2] = '.';
- n++;
- }
- return n;
-}
-
-void decode_numa_list(int *numa, char *t)
-{
- int node;
- int nr;
-
- memset(numa, 0, MAX_NODES * sizeof(int));
-
- if (!t)
- return;
-
- while (*t == 'N') {
- t++;
- node = strtoul(t, &t, 10);
- if (*t == '=') {
- t++;
- nr = strtoul(t, &t, 10);
- numa[node] = nr;
- if (node > highest_node)
- highest_node = node;
- }
- while (*t == ' ')
- t++;
- }
-}
-
-void slab_validate(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "validate", 1);
-}
-
-void slab_shrink(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- set_obj(s, "shrink", 1);
-}
-
-int line = 0;
-
-void first_line(void)
-{
- if (show_activity)
- printf("Name Objects Alloc Free %%Fill %%New "
- "FlushR %%FlushR FlushR_Objs O\n");
- else
- printf("Name Objects Objsize Space "
- " O/S O %%Ef Batch Flg\n");
-}
-
-unsigned long slab_size(struct slabinfo *s)
-{
- return s->slabs * (page_size << s->order);
-}
-
-unsigned long slab_activity(struct slabinfo *s)
-{
- return s->alloc + s->free;
-}
-
-void slab_numa(struct slabinfo *s, int mode)
-{
- int node;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (!highest_node) {
- printf("\n%s: No NUMA information available.\n", s->name);
- return;
- }
-
- if (skip_zero && !s->slabs)
- return;
-
- if (!line) {
- printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
- for(node = 0; node <= highest_node; node++)
- printf(" %4d", node);
- printf("\n----------------------");
- for(node = 0; node <= highest_node; node++)
- printf("-----");
- printf("\n");
- }
- printf("%-21s ", mode ? "All slabs" : s->name);
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa[node]);
- printf(" %4s", b);
- }
- printf("\n");
- if (mode) {
- printf("%-21s ", "Partial slabs");
- for(node = 0; node <= highest_node; node++) {
- char b[20];
-
- store_size(b, s->numa_partial[node]);
- printf(" %4s", b);
- }
- printf("\n");
- }
- line++;
-}
-
-void show_tracking(struct slabinfo *s)
-{
- printf("\n%s: Kernel object allocation\n", s->name);
- printf("-----------------------------------------------------------------------\n");
- if (read_slab_obj(s, "alloc_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
- printf("\n%s: Kernel object freeing\n", s->name);
- printf("------------------------------------------------------------------------\n");
- if (read_slab_obj(s, "free_calls"))
- printf(buffer);
- else
- printf("No Data\n");
-
-}
-
-void ops(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (read_slab_obj(s, "ops")) {
- printf("\n%s: kmem_cache operations\n", s->name);
- printf("--------------------------------------------\n");
- printf(buffer);
- } else
- printf("\n%s has no kmem_cache operations\n", s->name);
-}
-
-const char *onoff(int x)
-{
- if (x)
- return "On ";
- return "Off";
-}
-
-void slab_stats(struct slabinfo *s)
-{
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc;
- total_free = s->free;
-
- if (!total_alloc)
- return;
-
- printf("\n");
- printf("Slab Perf Counter\n");
- printf("------------------------------------------------------------------------\n");
- printf("Alloc: %8lu, partial %8lu, page allocator %8lu\n",
- total_alloc,
- s->alloc_slab_fill, s->alloc_slab_new);
- printf("Free: %8lu, partial %8lu, page allocator %8lu, remote %5lu\n",
- total_free,
- s->flush_slab_partial,
- s->flush_slab_free,
- s->free_remote);
- printf("Claim: %8lu, objects %8lu\n",
- s->claim_remote_list,
- s->claim_remote_list_objects);
- printf("Flush: %8lu, objects %8lu, remote: %8lu\n",
- s->flush_free_list,
- s->flush_free_list_objects,
- s->flush_free_list_remote);
- printf("FlushR:%8lu, objects %8lu\n",
- s->flush_rfree_list,
- s->flush_rfree_list_objects);
-}
-
-void report(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- printf("\nSlabcache: %-20s Order : %2d Objects: %lu\n",
- s->name, s->order, s->objects);
- if (s->hwcache_align)
- printf("** Hardware cacheline aligned\n");
- if (s->cache_dma)
- printf("** Memory is allocated in a special DMA zone\n");
- if (s->destroy_by_rcu)
- printf("** Slabs are destroyed via RCU\n");
- if (s->reclaim_account)
- printf("** Reclaim accounting active\n");
-
- printf("\nSizes (bytes) Slabs Debug Memory\n");
- printf("------------------------------------------------------------------------\n");
- printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
- s->object_size, s->slabs, "N/A",
- s->slabs * (page_size << s->order));
- printf("SlabObj: %7d Full : %7s Redzoning : %s Used : %7ld\n",
- s->slab_size, "N/A",
- onoff(s->red_zone), s->objects * s->object_size);
- printf("SlabSiz: %7d Partial: %7s Poisoning : %s Loss : %7ld\n",
- page_size << s->order, "N/A", onoff(s->poison),
- s->slabs * (page_size << s->order) - s->objects * s->object_size);
- printf("Loss : %7d CpuSlab: %7s Tracking : %s Lalig: %7ld\n",
- s->slab_size - s->object_size, "N/A", onoff(s->store_user),
- (s->slab_size - s->object_size) * s->objects);
- printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
- s->align, s->objs_per_slab, "N/A",
- ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
- s->slabs);
-
- ops(s);
- show_tracking(s);
- slab_numa(s, 1);
- slab_stats(s);
-}
-
-void slabcache(struct slabinfo *s)
-{
- char size_str[20];
- char flags[20];
- char *p = flags;
-
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (actual_slabs == 1) {
- report(s);
- return;
- }
-
- if (skip_zero && !show_empty && !s->slabs)
- return;
-
- if (show_empty && s->slabs)
- return;
-
- store_size(size_str, slab_size(s));
-
- if (!line++)
- first_line();
-
- if (s->cache_dma)
- *p++ = 'd';
- if (s->hwcache_align)
- *p++ = 'A';
- if (s->poison)
- *p++ = 'P';
- if (s->reclaim_account)
- *p++ = 'a';
- if (s->red_zone)
- *p++ = 'Z';
- if (s->store_user)
- *p++ = 'U';
-
- *p = 0;
- if (show_activity) {
- unsigned long total_alloc;
- unsigned long total_free;
-
- total_alloc = s->alloc;
- total_free = s->free;
-
- printf("%-21s %8ld %10ld %10ld %5ld %5ld %7ld %5ld %7ld %8d\n",
- s->name, s->objects,
- total_alloc, total_free,
- total_alloc ? (s->alloc_slab_fill * 100 / total_alloc) : 0,
- total_alloc ? (s->alloc_slab_new * 100 / total_alloc) : 0,
- s->flush_rfree_list,
- s->flush_rfree_list * 100 / (total_alloc + total_free),
- s->flush_rfree_list_objects,
- s->order);
- }
- else
- printf("%-21s %8ld %7d %8s %4d %1d %3ld %4d %s\n",
- s->name, s->objects, s->object_size, size_str,
- s->objs_per_slab, s->order,
- s->slabs ? (s->objects * s->object_size * 100) /
- (s->slabs * (page_size << s->order)) : 100,
- s->batch, flags);
-}
-
-/*
- * Analyze debug options. Return false if something is amiss.
- */
-int debug_opt_scan(char *opt)
-{
- if (!opt || !opt[0] || strcmp(opt, "-") == 0)
- return 1;
-
- if (strcasecmp(opt, "a") == 0) {
- sanity = 1;
- poison = 1;
- redzone = 1;
- tracking = 1;
- return 1;
- }
-
- for ( ; *opt; opt++)
- switch (*opt) {
- case 'F' : case 'f':
- if (sanity)
- return 0;
- sanity = 1;
- break;
- case 'P' : case 'p':
- if (poison)
- return 0;
- poison = 1;
- break;
-
- case 'Z' : case 'z':
- if (redzone)
- return 0;
- redzone = 1;
- break;
-
- case 'U' : case 'u':
- if (tracking)
- return 0;
- tracking = 1;
- break;
-
- case 'T' : case 't':
- if (tracing)
- return 0;
- tracing = 1;
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-int slab_empty(struct slabinfo *s)
-{
- if (s->objects > 0)
- return 0;
-
- /*
- * We may still have slabs even if there are no objects. Shrinking will
- * remove them.
- */
- if (s->slabs != 0)
- set_obj(s, "shrink", 1);
-
- return 1;
-}
-
-void slab_debug(struct slabinfo *s)
-{
- if (strcmp(s->name, "*") == 0)
- return;
-
- if (redzone && !s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 1);
- else
- fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
- }
- if (!redzone && s->red_zone) {
- if (slab_empty(s))
- set_obj(s, "red_zone", 0);
- else
- fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
- }
- if (poison && !s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 1);
- else
- fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
- }
- if (!poison && s->poison) {
- if (slab_empty(s))
- set_obj(s, "poison", 0);
- else
- fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
- }
- if (tracking && !s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 1);
- else
- fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
- }
- if (!tracking && s->store_user) {
- if (slab_empty(s))
- set_obj(s, "store_user", 0);
- else
- fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
- }
-}
-
-void totals(void)
-{
- struct slabinfo *s;
-
- int used_slabs = 0;
- char b1[20], b2[20], b3[20], b4[20];
- unsigned long long max = 1ULL << 63;
-
- /* Object size */
- unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
-
- /* Number of slabs in a slab cache */
- unsigned long long min_slabs = max, max_slabs = 0,
- avg_slabs, total_slabs = 0;
-
- /* Size of the whole slab */
- unsigned long long min_size = max, max_size = 0,
- avg_size, total_size = 0;
-
- /* Bytes used for object storage in a slab */
- unsigned long long min_used = max, max_used = 0,
- avg_used, total_used = 0;
-
- /* Waste: Bytes used for alignment and padding */
- unsigned long long min_waste = max, max_waste = 0,
- avg_waste, total_waste = 0;
- /* Number of objects in a slab */
- unsigned long long min_objects = max, max_objects = 0,
- avg_objects, total_objects = 0;
- /* Waste per object */
- unsigned long long min_objwaste = max,
- max_objwaste = 0, avg_objwaste,
- total_objwaste = 0;
-
- /* Memory per object */
- unsigned long long min_memobj = max,
- max_memobj = 0, avg_memobj,
- total_objsize = 0;
-
- for (s = slabinfo; s < slabinfo + slabs; s++) {
- unsigned long long size;
- unsigned long used;
- unsigned long long wasted;
- unsigned long long objwaste;
-
- if (!s->slabs || !s->objects)
- continue;
-
- used_slabs++;
-
- size = slab_size(s);
- used = s->objects * s->object_size;
- wasted = size - used;
- objwaste = s->slab_size - s->object_size;
-
- if (s->object_size < min_objsize)
- min_objsize = s->object_size;
- if (s->slabs < min_slabs)
- min_slabs = s->slabs;
- if (size < min_size)
- min_size = size;
- if (wasted < min_waste)
- min_waste = wasted;
- if (objwaste < min_objwaste)
- min_objwaste = objwaste;
- if (s->objects < min_objects)
- min_objects = s->objects;
- if (used < min_used)
- min_used = used;
- if (s->slab_size < min_memobj)
- min_memobj = s->slab_size;
-
- if (s->object_size > max_objsize)
- max_objsize = s->object_size;
- if (s->slabs > max_slabs)
- max_slabs = s->slabs;
- if (size > max_size)
- max_size = size;
- if (wasted > max_waste)
- max_waste = wasted;
- if (objwaste > max_objwaste)
- max_objwaste = objwaste;
- if (s->objects > max_objects)
- max_objects = s->objects;
- if (used > max_used)
- max_used = used;
- if (s->slab_size > max_memobj)
- max_memobj = s->slab_size;
-
- total_slabs += s->slabs;
- total_size += size;
- total_waste += wasted;
-
- total_objects += s->objects;
- total_used += used;
-
- total_objwaste += s->objects * objwaste;
- total_objsize += s->objects * s->slab_size;
- }
-
- if (!total_objects) {
- printf("No objects\n");
- return;
- }
- if (!used_slabs) {
- printf("No slabs\n");
- return;
- }
-
- /* Per slab averages */
- avg_slabs = total_slabs / used_slabs;
- avg_size = total_size / used_slabs;
- avg_waste = total_waste / used_slabs;
-
- avg_objects = total_objects / used_slabs;
- avg_used = total_used / used_slabs;
-
- /* Per object object sizes */
- avg_objsize = total_used / total_objects;
- avg_objwaste = total_objwaste / total_objects;
- avg_memobj = total_objsize / total_objects;
-
- printf("Slabcache Totals\n");
- printf("----------------\n");
- printf("Slabcaches : %3d Active: %3d\n",
- slabs, used_slabs);
-
- store_size(b1, total_size);store_size(b2, total_waste);
- store_size(b3, total_waste * 100 / total_used);
- printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
-
- store_size(b1, total_objects);
- printf("# Objects : %6s\n", b1);
-
- printf("\n");
- printf("Per Cache Average Min Max Total\n");
- printf("---------------------------------------------------------\n");
-
- store_size(b1, avg_objects);store_size(b2, min_objects);
- store_size(b3, max_objects);store_size(b4, total_objects);
- printf("#Objects %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_slabs);store_size(b2, min_slabs);
- store_size(b3, max_slabs);store_size(b4, total_slabs);
- printf("#Slabs %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_size);store_size(b2, min_size);
- store_size(b3, max_size);store_size(b4, total_size);
- printf("Memory %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_used);store_size(b2, min_used);
- store_size(b3, max_used);store_size(b4, total_used);
- printf("Used %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- store_size(b1, avg_waste);store_size(b2, min_waste);
- store_size(b3, max_waste);store_size(b4, total_waste);
- printf("Loss %10s %10s %10s %10s\n",
- b1, b2, b3, b4);
-
- printf("\n");
- printf("Per Object Average Min Max\n");
- printf("---------------------------------------------\n");
-
- store_size(b1, avg_memobj);store_size(b2, min_memobj);
- store_size(b3, max_memobj);
- printf("Memory %10s %10s %10s\n",
- b1, b2, b3);
- store_size(b1, avg_objsize);store_size(b2, min_objsize);
- store_size(b3, max_objsize);
- printf("User %10s %10s %10s\n",
- b1, b2, b3);
-
- store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
- store_size(b3, max_objwaste);
- printf("Loss %10s %10s %10s\n",
- b1, b2, b3);
-}
-
-void sort_slabs(void)
-{
- struct slabinfo *s1,*s2;
-
- for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
- for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
- int result;
-
- if (sort_size)
- result = slab_size(s1) < slab_size(s2);
- else if (sort_active)
- result = slab_activity(s1) < slab_activity(s2);
- else
- result = strcasecmp(s1->name, s2->name);
-
- if (show_inverted)
- result = -result;
-
- if (result > 0) {
- struct slabinfo t;
-
- memcpy(&t, s1, sizeof(struct slabinfo));
- memcpy(s1, s2, sizeof(struct slabinfo));
- memcpy(s2, &t, sizeof(struct slabinfo));
- }
- }
- }
-}
-
-int slab_mismatch(char *slab)
-{
- return regexec(&pattern, slab, 0, NULL, 0);
-}
-
-void read_slab_dir(void)
-{
- DIR *dir;
- struct dirent *de;
- struct slabinfo *slab = slabinfo;
- char *t;
-
- if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
- fatal("SYSFS support for SLUB not active\n");
-
- dir = opendir(".");
- while ((de = readdir(dir))) {
- if (de->d_name[0] == '.' ||
- (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
- continue;
- switch (de->d_type) {
- case DT_DIR:
- if (chdir(de->d_name))
- fatal("Unable to access slab %s\n", slab->name);
- slab->name = strdup(de->d_name);
- slab->align = get_obj("align");
- slab->cache_dma = get_obj("cache_dma");
- slab->destroy_by_rcu = get_obj("destroy_by_rcu");
- slab->hwcache_align = get_obj("hwcache_align");
- slab->object_size = get_obj("object_size");
- slab->objects = get_obj("objects");
- slab->total_objects = get_obj("total_objects");
- slab->objs_per_slab = get_obj("objs_per_slab");
- slab->order = get_obj("order");
- slab->poison = get_obj("poison");
- slab->reclaim_account = get_obj("reclaim_account");
- slab->red_zone = get_obj("red_zone");
- slab->slab_size = get_obj("slab_size");
- slab->slabs = get_obj_and_str("slabs", &t);
- decode_numa_list(slab->numa, t);
- free(t);
- slab->store_user = get_obj("store_user");
- slab->batch = get_obj("batch");
- slab->alloc = get_obj("alloc");
- slab->alloc_slab_fill = get_obj("alloc_slab_fill");
- slab->alloc_slab_new = get_obj("alloc_slab_new");
- slab->free = get_obj("free");
- slab->free_remote = get_obj("free_remote");
- slab->claim_remote_list = get_obj("claim_remote_list");
- slab->claim_remote_list_objects = get_obj("claim_remote_list_objects");
- slab->flush_free_list = get_obj("flush_free_list");
- slab->flush_free_list_objects = get_obj("flush_free_list_objects");
- slab->flush_free_list_remote = get_obj("flush_free_list_remote");
- slab->flush_rfree_list = get_obj("flush_rfree_list");
- slab->flush_rfree_list_objects = get_obj("flush_rfree_list_objects");
- slab->flush_slab_free = get_obj("flush_slab_free");
- slab->flush_slab_partial = get_obj("flush_slab_partial");
-
- chdir("..");
- slab++;
- break;
- default :
- fatal("Unknown file type %lx\n", de->d_type);
- }
- }
- closedir(dir);
- slabs = slab - slabinfo;
- actual_slabs = slabs;
- if (slabs > MAX_SLABS)
- fatal("Too many slabs\n");
-}
-
-void output_slabs(void)
-{
- struct slabinfo *slab;
-
- for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
-
- if (show_numa)
- slab_numa(slab, 0);
- else if (show_track)
- show_tracking(slab);
- else if (validate)
- slab_validate(slab);
- else if (shrink)
- slab_shrink(slab);
- else if (set_debug)
- slab_debug(slab);
- else if (show_ops)
- ops(slab);
- else if (show_slab)
- slabcache(slab);
- else if (show_report)
- report(slab);
- }
-}
-
-struct option opts[] = {
- { "activity", 0, NULL, 'A' },
- { "debug", 2, NULL, 'd' },
- { "display-activity", 0, NULL, 'D' },
- { "empty", 0, NULL, 'e' },
- { "help", 0, NULL, 'h' },
- { "inverted", 0, NULL, 'i'},
- { "numa", 0, NULL, 'n' },
- { "ops", 0, NULL, 'o' },
- { "report", 0, NULL, 'r' },
- { "shrink", 0, NULL, 's' },
- { "slabs", 0, NULL, 'l' },
- { "track", 0, NULL, 't'},
- { "validate", 0, NULL, 'v' },
- { "zero", 0, NULL, 'z' },
- { "1ref", 0, NULL, '1'},
- { NULL, 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- int c;
- int err;
- char *pattern_source;
-
- page_size = getpagesize();
-
- while ((c = getopt_long(argc, argv, "Ad::Dehil1noprstvzTS",
- opts, NULL)) != -1)
- switch (c) {
- case 'A':
- sort_active = 1;
- break;
- case 'd':
- set_debug = 1;
- if (!debug_opt_scan(optarg))
- fatal("Invalid debug option '%s'\n", optarg);
- break;
- case 'D':
- show_activity = 1;
- break;
- case 'e':
- show_empty = 1;
- break;
- case 'h':
- usage();
- return 0;
- case 'i':
- show_inverted = 1;
- break;
- case 'n':
- show_numa = 1;
- break;
- case 'o':
- show_ops = 1;
- break;
- case 'r':
- show_report = 1;
- break;
- case 's':
- shrink = 1;
- break;
- case 'l':
- show_slab = 1;
- break;
- case 't':
- show_track = 1;
- break;
- case 'v':
- validate = 1;
- break;
- case 'z':
- skip_zero = 0;
- break;
- case 'T':
- show_totals = 1;
- break;
- case 'S':
- sort_size = 1;
- break;
-
- default:
- fatal("%s: Invalid option '%c'\n", argv[0], optopt);
-
- }
-
- if (!show_slab && !show_track && !show_report
- && !validate && !shrink && !set_debug && !show_ops)
- show_slab = 1;
-
- if (argc > optind)
- pattern_source = argv[optind];
- else
- pattern_source = ".*";
-
- err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
- if (err)
- fatal("%s: Invalid pattern '%s' code %d\n",
- argv[0], pattern_source, err);
- read_slab_dir();
- if (show_totals)
- totals();
- else {
- sort_slabs();
- output_slabs();
- }
- return 0;
-}
--- linux-mm.orig/Documentation/vm/slub.txt 2009-09-02 12:14:09.000000000 +0800
+++ linux-mm/Documentation/vm/slub.txt 2009-09-02 12:14:10.000000000 +0800
@@ -17,7 +17,7 @@ data and perform operation on the slabs.
slabs that have data in them. See "slabinfo -h" for more options when
running the command. slabinfo can be compiled with
-gcc -o slabinfo Documentation/vm/slabinfo.c
+gcc -o slabinfo tools/vm/slabinfo.c
Some of the modes of operation of slabinfo require that slub debugging
be enabled on the command line. F.e. no tracking information will be
--- linux-mm.orig/tools/vm/.gitignore 2009-09-02 12:14:09.000000000 +0800
+++ linux-mm/tools/vm/.gitignore 2009-09-02 12:14:10.000000000 +0800
@@ -1 +1,3 @@
page-types
+slabinfo
+slqbinfo
--- linux-mm.orig/tools/vm/Makefile 2009-09-02 12:14:09.000000000 +0800
+++ linux-mm/tools/vm/Makefile 2009-09-02 12:14:10.000000000 +0800
@@ -1,5 +1,5 @@
# List of programs to build
-hostprogs-y := page-types
+hostprogs-y := page-types slabinfo slqbinfo
# Tell kbuild to always build the programs
always := $(hostprogs-y)
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/slabinfo.c 2009-09-02 12:14:10.000000000 +0800
@@ -0,0 +1,1364 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ *
+ * Compile by:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+ char *name;
+ int alias;
+ int refs;
+ int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+ int hwcache_align, object_size, objs_per_slab;
+ int sanity_checks, slab_size, store_user, trace;
+ int order, poison, reclaim_account, red_zone;
+ unsigned long partial, objects, slabs, objects_partial, objects_total;
+ unsigned long alloc_fastpath, alloc_slowpath;
+ unsigned long free_fastpath, free_slowpath;
+ unsigned long free_frozen, free_add_partial, free_remove_partial;
+ unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
+ unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+ unsigned long deactivate_to_head, deactivate_to_tail;
+ unsigned long deactivate_remote_frees, order_fallback;
+ int numa[MAX_NODES];
+ int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+struct aliasinfo {
+ char *name;
+ char *ref;
+ struct slabinfo *slab;
+} aliasinfo[MAX_ALIASES];
+
+int slabs = 0;
+int actual_slabs = 0;
+int aliases = 0;
+int alias_targets = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_alias = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int show_first_alias = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_single_ref = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+static void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+static void usage(void)
+{
+ printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
+ "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+ "-a|--aliases Show aliases\n"
+ "-A|--activity Most active slabs first\n"
+ "-d<options>|--debug=<options> Set/Clear Debug options\n"
+ "-D|--display-active Switch line format to activity\n"
+ "-e|--empty Show empty slabs\n"
+ "-f|--first-alias Show first alias\n"
+ "-h|--help Show usage information\n"
+ "-i|--inverted Inverted list\n"
+ "-l|--slabs Show slabs\n"
+ "-n|--numa Show NUMA information\n"
+ "-o|--ops Show kmem_cache_ops\n"
+ "-s|--shrink Shrink slabs\n"
+ "-r|--report Detailed report on single slabs\n"
+ "-S|--Size Sort by size\n"
+ "-t|--tracking Show alloc/free information\n"
+ "-T|--Totals Show summary information\n"
+ "-v|--validate Validate slabs\n"
+ "-z|--zero Include empty slabs\n"
+ "-1|--1ref Single reference\n"
+ "\nValid debug options (FZPUT may be combined)\n"
+ "a / A Switch on all debug options (=FZUP)\n"
+ "- Switch off all debug options\n"
+ "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
+ "z / Z Redzoning\n"
+ "p / P Poisoning\n"
+ "u / U Tracking\n"
+ "t / T Tracing\n"
+ );
+}
+
+static unsigned long read_obj(const char *name)
+{
+ FILE *f = fopen(name, "r");
+
+ if (!f)
+ buffer[0] = 0;
+ else {
+ if (!fgets(buffer, sizeof(buffer), f))
+ buffer[0] = 0;
+ fclose(f);
+ if (buffer[strlen(buffer)] == '\n')
+ buffer[strlen(buffer)] = 0;
+ }
+ return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+static unsigned long get_obj(const char *name)
+{
+ if (!read_obj(name))
+ return 0;
+
+ return atol(buffer);
+}
+
+static unsigned long get_obj_and_str(const char *name, char **x)
+{
+ unsigned long result = 0;
+ char *p;
+
+ *x = NULL;
+
+ if (!read_obj(name)) {
+ x = NULL;
+ return 0;
+ }
+ result = strtoul(buffer, &p, 10);
+ while (*p == ' ')
+ p++;
+ if (*p)
+ *x = strdup(p);
+ return result;
+}
+
+static void set_obj(struct slabinfo *s, const char *name, int n)
+{
+ char x[100];
+ FILE *f;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "w");
+ if (!f)
+ fatal("Cannot write to %s\n", x);
+
+ fprintf(f, "%d\n", n);
+ fclose(f);
+}
+
+static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+ char x[100];
+ FILE *f;
+ size_t l;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "r");
+ if (!f) {
+ buffer[0] = 0;
+ l = 0;
+ } else {
+ l = fread(buffer, 1, sizeof(buffer), f);
+ buffer[l] = 0;
+ fclose(f);
+ }
+ return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+static int store_size(char *buffer, unsigned long value)
+{
+ unsigned long divisor = 1;
+ char trailer = 0;
+ int n;
+
+ if (value > 1000000000UL) {
+ divisor = 100000000UL;
+ trailer = 'G';
+ } else if (value > 1000000UL) {
+ divisor = 100000UL;
+ trailer = 'M';
+ } else if (value > 1000UL) {
+ divisor = 100;
+ trailer = 'K';
+ }
+
+ value /= divisor;
+ n = sprintf(buffer, "%ld",value);
+ if (trailer) {
+ buffer[n] = trailer;
+ n++;
+ buffer[n] = 0;
+ }
+ if (divisor != 1) {
+ memmove(buffer + n - 2, buffer + n - 3, 4);
+ buffer[n-2] = '.';
+ n++;
+ }
+ return n;
+}
+
+static void decode_numa_list(int *numa, char *t)
+{
+ int node;
+ int nr;
+
+ memset(numa, 0, MAX_NODES * sizeof(int));
+
+ if (!t)
+ return;
+
+ while (*t == 'N') {
+ t++;
+ node = strtoul(t, &t, 10);
+ if (*t == '=') {
+ t++;
+ nr = strtoul(t, &t, 10);
+ numa[node] = nr;
+ if (node > highest_node)
+ highest_node = node;
+ }
+ while (*t == ' ')
+ t++;
+ }
+}
+
+static void slab_validate(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "validate", 1);
+}
+
+static void slab_shrink(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+static void first_line(void)
+{
+ if (show_activity)
+ printf("Name Objects Alloc Free %%Fast Fallb O\n");
+ else
+ printf("Name Objects Objsize Space "
+ "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
+}
+
+/*
+ * Find the shortest alias of a slab
+ */
+static struct aliasinfo *find_one_alias(struct slabinfo *find)
+{
+ struct aliasinfo *a;
+ struct aliasinfo *best = NULL;
+
+ for(a = aliasinfo;a < aliasinfo + aliases; a++) {
+ if (a->slab == find &&
+ (!best || strlen(best->name) < strlen(a->name))) {
+ best = a;
+ if (strncmp(a->name,"kmall", 5) == 0)
+ return best;
+ }
+ }
+ return best;
+}
+
+static unsigned long slab_size(struct slabinfo *s)
+{
+ return s->slabs * (page_size << s->order);
+}
+
+static unsigned long slab_activity(struct slabinfo *s)
+{
+ return s->alloc_fastpath + s->free_fastpath +
+ s->alloc_slowpath + s->free_slowpath;
+}
+
+static void slab_numa(struct slabinfo *s, int mode)
+{
+ int node;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (!highest_node) {
+ printf("\n%s: No NUMA information available.\n", s->name);
+ return;
+ }
+
+ if (skip_zero && !s->slabs)
+ return;
+
+ if (!line) {
+ printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+ for(node = 0; node <= highest_node; node++)
+ printf(" %4d", node);
+ printf("\n----------------------");
+ for(node = 0; node <= highest_node; node++)
+ printf("-----");
+ printf("\n");
+ }
+ printf("%-21s ", mode ? "All slabs" : s->name);
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ if (mode) {
+ printf("%-21s ", "Partial slabs");
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa_partial[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ }
+ line++;
+}
+
+static void show_tracking(struct slabinfo *s)
+{
+ printf("\n%s: Kernel object allocation\n", s->name);
+ printf("-----------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "alloc_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+ printf("\n%s: Kernel object freeing\n", s->name);
+ printf("------------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "free_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+}
+
+static void ops(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (read_slab_obj(s, "ops")) {
+ printf("\n%s: kmem_cache operations\n", s->name);
+ printf("--------------------------------------------\n");
+ printf(buffer);
+ } else
+ printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+static const char *onoff(int x)
+{
+ if (x)
+ return "On ";
+ return "Off";
+}
+
+static void slab_stats(struct slabinfo *s)
+{
+ unsigned long total_alloc;
+ unsigned long total_free;
+ unsigned long total;
+
+ if (!s->alloc_slab)
+ return;
+
+ total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+ total_free = s->free_fastpath + s->free_slowpath;
+
+ if (!total_alloc)
+ return;
+
+ printf("\n");
+ printf("Slab Perf Counter Alloc Free %%Al %%Fr\n");
+ printf("--------------------------------------------------\n");
+ printf("Fastpath %8lu %8lu %3lu %3lu\n",
+ s->alloc_fastpath, s->free_fastpath,
+ s->alloc_fastpath * 100 / total_alloc,
+ s->free_fastpath * 100 / total_free);
+ printf("Slowpath %8lu %8lu %3lu %3lu\n",
+ total_alloc - s->alloc_fastpath, s->free_slowpath,
+ (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
+ s->free_slowpath * 100 / total_free);
+ printf("Page Alloc %8lu %8lu %3lu %3lu\n",
+ s->alloc_slab, s->free_slab,
+ s->alloc_slab * 100 / total_alloc,
+ s->free_slab * 100 / total_free);
+ printf("Add partial %8lu %8lu %3lu %3lu\n",
+ s->deactivate_to_head + s->deactivate_to_tail,
+ s->free_add_partial,
+ (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
+ s->free_add_partial * 100 / total_free);
+ printf("Remove partial %8lu %8lu %3lu %3lu\n",
+ s->alloc_from_partial, s->free_remove_partial,
+ s->alloc_from_partial * 100 / total_alloc,
+ s->free_remove_partial * 100 / total_free);
+
+ printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
+ s->deactivate_remote_frees, s->free_frozen,
+ s->deactivate_remote_frees * 100 / total_alloc,
+ s->free_frozen * 100 / total_free);
+
+ printf("Total %8lu %8lu\n\n", total_alloc, total_free);
+
+ if (s->cpuslab_flush)
+ printf("Flushes %8lu\n", s->cpuslab_flush);
+
+ if (s->alloc_refill)
+ printf("Refill %8lu\n", s->alloc_refill);
+
+ total = s->deactivate_full + s->deactivate_empty +
+ s->deactivate_to_head + s->deactivate_to_tail;
+
+ if (total)
+ printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
+ "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
+ s->deactivate_full, (s->deactivate_full * 100) / total,
+ s->deactivate_empty, (s->deactivate_empty * 100) / total,
+ s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
+ s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
+}
+
+static void report(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ printf("\nSlabcache: %-20s Aliases: %2d Order : %2d Objects: %lu\n",
+ s->name, s->aliases, s->order, s->objects);
+ if (s->hwcache_align)
+ printf("** Hardware cacheline aligned\n");
+ if (s->cache_dma)
+ printf("** Memory is allocated in a special DMA zone\n");
+ if (s->destroy_by_rcu)
+ printf("** Slabs are destroyed via RCU\n");
+ if (s->reclaim_account)
+ printf("** Reclaim accounting active\n");
+
+ printf("\nSizes (bytes) Slabs Debug Memory\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
+ s->object_size, s->slabs, onoff(s->sanity_checks),
+ s->slabs * (page_size << s->order));
+ printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
+ s->slab_size, s->slabs - s->partial - s->cpu_slabs,
+ onoff(s->red_zone), s->objects * s->object_size);
+ printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
+ page_size << s->order, s->partial, onoff(s->poison),
+ s->slabs * (page_size << s->order) - s->objects * s->object_size);
+ printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
+ s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
+ (s->slab_size - s->object_size) * s->objects);
+ printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
+ s->align, s->objs_per_slab, onoff(s->trace),
+ ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+ s->slabs);
+
+ ops(s);
+ show_tracking(s);
+ slab_numa(s, 1);
+ slab_stats(s);
+}
+
+static void slabcache(struct slabinfo *s)
+{
+ char size_str[20];
+ char dist_str[40];
+ char flags[20];
+ char *p = flags;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (actual_slabs == 1) {
+ report(s);
+ return;
+ }
+
+ if (skip_zero && !show_empty && !s->slabs)
+ return;
+
+ if (show_empty && s->slabs)
+ return;
+
+ store_size(size_str, slab_size(s));
+ snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
+ s->partial, s->cpu_slabs);
+
+ if (!line++)
+ first_line();
+
+ if (s->aliases)
+ *p++ = '*';
+ if (s->cache_dma)
+ *p++ = 'd';
+ if (s->hwcache_align)
+ *p++ = 'A';
+ if (s->poison)
+ *p++ = 'P';
+ if (s->reclaim_account)
+ *p++ = 'a';
+ if (s->red_zone)
+ *p++ = 'Z';
+ if (s->sanity_checks)
+ *p++ = 'F';
+ if (s->store_user)
+ *p++ = 'U';
+ if (s->trace)
+ *p++ = 'T';
+
+ *p = 0;
+ if (show_activity) {
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+ total_free = s->free_fastpath + s->free_slowpath;
+
+ printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
+ s->name, s->objects,
+ total_alloc, total_free,
+ total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
+ total_free ? (s->free_fastpath * 100 / total_free) : 0,
+ s->order_fallback, s->order);
+ }
+ else
+ printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
+ s->name, s->objects, s->object_size, size_str, dist_str,
+ s->objs_per_slab, s->order,
+ s->slabs ? (s->partial * 100) / s->slabs : 100,
+ s->slabs ? (s->objects * s->object_size * 100) /
+ (s->slabs * (page_size << s->order)) : 100,
+ flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+static int debug_opt_scan(char *opt)
+{
+ if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+ return 1;
+
+ if (strcasecmp(opt, "a") == 0) {
+ sanity = 1;
+ poison = 1;
+ redzone = 1;
+ tracking = 1;
+ return 1;
+ }
+
+ for ( ; *opt; opt++)
+ switch (*opt) {
+ case 'F' : case 'f':
+ if (sanity)
+ return 0;
+ sanity = 1;
+ break;
+ case 'P' : case 'p':
+ if (poison)
+ return 0;
+ poison = 1;
+ break;
+
+ case 'Z' : case 'z':
+ if (redzone)
+ return 0;
+ redzone = 1;
+ break;
+
+ case 'U' : case 'u':
+ if (tracking)
+ return 0;
+ tracking = 1;
+ break;
+
+ case 'T' : case 't':
+ if (tracing)
+ return 0;
+ tracing = 1;
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static int slab_empty(struct slabinfo *s)
+{
+ if (s->objects > 0)
+ return 0;
+
+ /*
+ * We may still have slabs even if there are no objects. Shrinking will
+ * remove them.
+ */
+ if (s->slabs != 0)
+ set_obj(s, "shrink", 1);
+
+ return 1;
+}
+
+static void slab_debug(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (sanity && !s->sanity_checks) {
+ set_obj(s, "sanity", 1);
+ }
+ if (!sanity && s->sanity_checks) {
+ if (slab_empty(s))
+ set_obj(s, "sanity", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
+ }
+ if (redzone && !s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+ }
+ if (!redzone && s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+ }
+ if (poison && !s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+ }
+ if (!poison && s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+ }
+ if (tracking && !s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+ }
+ if (!tracking && s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+ }
+ if (tracing && !s->trace) {
+ if (slabs == 1)
+ set_obj(s, "trace", 1);
+ else
+ fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
+ }
+ if (!tracing && s->trace)
+ set_obj(s, "trace", 1);
+}
+
+static void totals(void)
+{
+ struct slabinfo *s;
+
+ int used_slabs = 0;
+ char b1[20], b2[20], b3[20], b4[20];
+ unsigned long long max = 1ULL << 63;
+
+ /* Object size */
+ unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+ /* Number of partial slabs in a slabcache */
+ unsigned long long min_partial = max, max_partial = 0,
+ avg_partial, total_partial = 0;
+
+ /* Number of slabs in a slab cache */
+ unsigned long long min_slabs = max, max_slabs = 0,
+ avg_slabs, total_slabs = 0;
+
+ /* Size of the whole slab */
+ unsigned long long min_size = max, max_size = 0,
+ avg_size, total_size = 0;
+
+ /* Bytes used for object storage in a slab */
+ unsigned long long min_used = max, max_used = 0,
+ avg_used, total_used = 0;
+
+ /* Waste: Bytes used for alignment and padding */
+ unsigned long long min_waste = max, max_waste = 0,
+ avg_waste, total_waste = 0;
+ /* Number of objects in a slab */
+ unsigned long long min_objects = max, max_objects = 0,
+ avg_objects, total_objects = 0;
+ /* Waste per object */
+ unsigned long long min_objwaste = max,
+ max_objwaste = 0, avg_objwaste,
+ total_objwaste = 0;
+
+ /* Memory per object */
+ unsigned long long min_memobj = max,
+ max_memobj = 0, avg_memobj,
+ total_objsize = 0;
+
+ /* Percentage of partial slabs per slab */
+ unsigned long min_ppart = 100, max_ppart = 0,
+ avg_ppart, total_ppart = 0;
+
+ /* Number of objects in partial slabs */
+ unsigned long min_partobj = max, max_partobj = 0,
+ avg_partobj, total_partobj = 0;
+
+ /* Percentage of partial objects of all objects in a slab */
+ unsigned long min_ppartobj = 100, max_ppartobj = 0,
+ avg_ppartobj, total_ppartobj = 0;
+
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ unsigned long long size;
+ unsigned long used;
+ unsigned long long wasted;
+ unsigned long long objwaste;
+ unsigned long percentage_partial_slabs;
+ unsigned long percentage_partial_objs;
+
+ if (!s->slabs || !s->objects)
+ continue;
+
+ used_slabs++;
+
+ size = slab_size(s);
+ used = s->objects * s->object_size;
+ wasted = size - used;
+ objwaste = s->slab_size - s->object_size;
+
+ percentage_partial_slabs = s->partial * 100 / s->slabs;
+ if (percentage_partial_slabs > 100)
+ percentage_partial_slabs = 100;
+
+ percentage_partial_objs = s->objects_partial * 100
+ / s->objects;
+
+ if (percentage_partial_objs > 100)
+ percentage_partial_objs = 100;
+
+ if (s->object_size < min_objsize)
+ min_objsize = s->object_size;
+ if (s->partial < min_partial)
+ min_partial = s->partial;
+ if (s->slabs < min_slabs)
+ min_slabs = s->slabs;
+ if (size < min_size)
+ min_size = size;
+ if (wasted < min_waste)
+ min_waste = wasted;
+ if (objwaste < min_objwaste)
+ min_objwaste = objwaste;
+ if (s->objects < min_objects)
+ min_objects = s->objects;
+ if (used < min_used)
+ min_used = used;
+ if (s->objects_partial < min_partobj)
+ min_partobj = s->objects_partial;
+ if (percentage_partial_slabs < min_ppart)
+ min_ppart = percentage_partial_slabs;
+ if (percentage_partial_objs < min_ppartobj)
+ min_ppartobj = percentage_partial_objs;
+ if (s->slab_size < min_memobj)
+ min_memobj = s->slab_size;
+
+ if (s->object_size > max_objsize)
+ max_objsize = s->object_size;
+ if (s->partial > max_partial)
+ max_partial = s->partial;
+ if (s->slabs > max_slabs)
+ max_slabs = s->slabs;
+ if (size > max_size)
+ max_size = size;
+ if (wasted > max_waste)
+ max_waste = wasted;
+ if (objwaste > max_objwaste)
+ max_objwaste = objwaste;
+ if (s->objects > max_objects)
+ max_objects = s->objects;
+ if (used > max_used)
+ max_used = used;
+ if (s->objects_partial > max_partobj)
+ max_partobj = s->objects_partial;
+ if (percentage_partial_slabs > max_ppart)
+ max_ppart = percentage_partial_slabs;
+ if (percentage_partial_objs > max_ppartobj)
+ max_ppartobj = percentage_partial_objs;
+ if (s->slab_size > max_memobj)
+ max_memobj = s->slab_size;
+
+ total_partial += s->partial;
+ total_slabs += s->slabs;
+ total_size += size;
+ total_waste += wasted;
+
+ total_objects += s->objects;
+ total_used += used;
+ total_partobj += s->objects_partial;
+ total_ppart += percentage_partial_slabs;
+ total_ppartobj += percentage_partial_objs;
+
+ total_objwaste += s->objects * objwaste;
+ total_objsize += s->objects * s->slab_size;
+ }
+
+ if (!total_objects) {
+ printf("No objects\n");
+ return;
+ }
+ if (!used_slabs) {
+ printf("No slabs\n");
+ return;
+ }
+
+ /* Per slab averages */
+ avg_partial = total_partial / used_slabs;
+ avg_slabs = total_slabs / used_slabs;
+ avg_size = total_size / used_slabs;
+ avg_waste = total_waste / used_slabs;
+
+ avg_objects = total_objects / used_slabs;
+ avg_used = total_used / used_slabs;
+ avg_partobj = total_partobj / used_slabs;
+ avg_ppart = total_ppart / used_slabs;
+ avg_ppartobj = total_ppartobj / used_slabs;
+
+ /* Per object object sizes */
+ avg_objsize = total_used / total_objects;
+ avg_objwaste = total_objwaste / total_objects;
+ avg_partobj = total_partobj * 100 / total_objects;
+ avg_memobj = total_objsize / total_objects;
+
+ printf("Slabcache Totals\n");
+ printf("----------------\n");
+ printf("Slabcaches : %3d Aliases : %3d->%-3d Active: %3d\n",
+ slabs, aliases, alias_targets, used_slabs);
+
+ store_size(b1, total_size);store_size(b2, total_waste);
+ store_size(b3, total_waste * 100 / total_used);
+ printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
+
+ store_size(b1, total_objects);store_size(b2, total_partobj);
+ store_size(b3, total_partobj * 100 / total_objects);
+ printf("# Objects : %6s # PartObj: %6s ORatio:%6s%%\n", b1, b2, b3);
+
+ printf("\n");
+ printf("Per Cache Average Min Max Total\n");
+ printf("---------------------------------------------------------\n");
+
+ store_size(b1, avg_objects);store_size(b2, min_objects);
+ store_size(b3, max_objects);store_size(b4, total_objects);
+ printf("#Objects %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_slabs);store_size(b2, min_slabs);
+ store_size(b3, max_slabs);store_size(b4, total_slabs);
+ printf("#Slabs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_partial);store_size(b2, min_partial);
+ store_size(b3, max_partial);store_size(b4, total_partial);
+ printf("#PartSlab %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+ store_size(b1, avg_ppart);store_size(b2, min_ppart);
+ store_size(b3, max_ppart);
+ store_size(b4, total_partial * 100 / total_slabs);
+ printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_partobj);store_size(b2, min_partobj);
+ store_size(b3, max_partobj);
+ store_size(b4, total_partobj);
+ printf("PartObjs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
+ store_size(b3, max_ppartobj);
+ store_size(b4, total_partobj * 100 / total_objects);
+ printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_size);store_size(b2, min_size);
+ store_size(b3, max_size);store_size(b4, total_size);
+ printf("Memory %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_used);store_size(b2, min_used);
+ store_size(b3, max_used);store_size(b4, total_used);
+ printf("Used %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_waste);store_size(b2, min_waste);
+ store_size(b3, max_waste);store_size(b4, total_waste);
+ printf("Loss %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ printf("\n");
+ printf("Per Object Average Min Max\n");
+ printf("---------------------------------------------\n");
+
+ store_size(b1, avg_memobj);store_size(b2, min_memobj);
+ store_size(b3, max_memobj);
+ printf("Memory %10s %10s %10s\n",
+ b1, b2, b3);
+ store_size(b1, avg_objsize);store_size(b2, min_objsize);
+ store_size(b3, max_objsize);
+ printf("User %10s %10s %10s\n",
+ b1, b2, b3);
+
+ store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+ store_size(b3, max_objwaste);
+ printf("Loss %10s %10s %10s\n",
+ b1, b2, b3);
+}
+
+static void sort_slabs(void)
+{
+ struct slabinfo *s1,*s2;
+
+ for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+ for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+ int result;
+
+ if (sort_size)
+ result = slab_size(s1) < slab_size(s2);
+ else if (sort_active)
+ result = slab_activity(s1) < slab_activity(s2);
+ else
+ result = strcasecmp(s1->name, s2->name);
+
+ if (show_inverted)
+ result = -result;
+
+ if (result > 0) {
+ struct slabinfo t;
+
+ memcpy(&t, s1, sizeof(struct slabinfo));
+ memcpy(s1, s2, sizeof(struct slabinfo));
+ memcpy(s2, &t, sizeof(struct slabinfo));
+ }
+ }
+ }
+}
+
+static void sort_aliases(void)
+{
+ struct aliasinfo *a1,*a2;
+
+ for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
+ for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
+ char *n1, *n2;
+
+ n1 = a1->name;
+ n2 = a2->name;
+ if (show_alias && !show_inverted) {
+ n1 = a1->ref;
+ n2 = a2->ref;
+ }
+ if (strcasecmp(n1, n2) > 0) {
+ struct aliasinfo t;
+
+ memcpy(&t, a1, sizeof(struct aliasinfo));
+ memcpy(a1, a2, sizeof(struct aliasinfo));
+ memcpy(a2, &t, sizeof(struct aliasinfo));
+ }
+ }
+ }
+}
+
+static void link_slabs(void)
+{
+ struct aliasinfo *a;
+ struct slabinfo *s;
+
+ for (a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+ for (s = slabinfo; s < slabinfo + slabs; s++)
+ if (strcmp(a->ref, s->name) == 0) {
+ a->slab = s;
+ s->refs++;
+ break;
+ }
+ if (s == slabinfo + slabs)
+ fatal("Unresolved alias %s\n", a->ref);
+ }
+}
+
+static void alias(void)
+{
+ struct aliasinfo *a;
+ char *active = NULL;
+
+ sort_aliases();
+ link_slabs();
+
+ for(a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+ if (!show_single_ref && a->slab->refs == 1)
+ continue;
+
+ if (!show_inverted) {
+ if (active) {
+ if (strcmp(a->slab->name, active) == 0) {
+ printf(" %s", a->name);
+ continue;
+ }
+ }
+ printf("\n%-12s <- %s", a->slab->name, a->name);
+ active = a->slab->name;
+ }
+ else
+ printf("%-20s -> %s\n", a->name, a->slab->name);
+ }
+ if (active)
+ printf("\n");
+}
+
+
+static void rename_slabs(void)
+{
+ struct slabinfo *s;
+ struct aliasinfo *a;
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ if (*s->name != ':')
+ continue;
+
+ if (s->refs > 1 && !show_first_alias)
+ continue;
+
+ a = find_one_alias(s);
+
+ if (a)
+ s->name = a->name;
+ else {
+ s->name = "*";
+ actual_slabs--;
+ }
+ }
+}
+
+static int slab_mismatch(char *slab)
+{
+ return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+static void read_slab_dir(void)
+{
+ DIR *dir;
+ struct dirent *de;
+ struct slabinfo *slab = slabinfo;
+ struct aliasinfo *alias = aliasinfo;
+ char *p;
+ char *t;
+ int count;
+
+ if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+ fatal("SYSFS support for SLUB not active\n");
+
+ dir = opendir(".");
+ while ((de = readdir(dir))) {
+ if (de->d_name[0] == '.' ||
+ (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+ continue;
+ switch (de->d_type) {
+ case DT_LNK:
+ alias->name = strdup(de->d_name);
+ count = readlink(de->d_name, buffer, sizeof(buffer));
+
+ if (count < 0)
+ fatal("Cannot read symlink %s\n", de->d_name);
+
+ buffer[count] = 0;
+ p = buffer + count;
+ while (p > buffer && p[-1] != '/')
+ p--;
+ alias->ref = strdup(p);
+ alias++;
+ break;
+ case DT_DIR:
+ if (chdir(de->d_name))
+ fatal("Unable to access slab %s\n", slab->name);
+ slab->name = strdup(de->d_name);
+ slab->alias = 0;
+ slab->refs = 0;
+ slab->aliases = get_obj("aliases");
+ slab->align = get_obj("align");
+ slab->cache_dma = get_obj("cache_dma");
+ slab->cpu_slabs = get_obj("cpu_slabs");
+ slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+ slab->hwcache_align = get_obj("hwcache_align");
+ slab->object_size = get_obj("object_size");
+ slab->objects = get_obj("objects");
+ slab->objects_partial = get_obj("objects_partial");
+ slab->objects_total = get_obj("objects_total");
+ slab->objs_per_slab = get_obj("objs_per_slab");
+ slab->order = get_obj("order");
+ slab->partial = get_obj("partial");
+ slab->partial = get_obj_and_str("partial", &t);
+ decode_numa_list(slab->numa_partial, t);
+ free(t);
+ slab->poison = get_obj("poison");
+ slab->reclaim_account = get_obj("reclaim_account");
+ slab->red_zone = get_obj("red_zone");
+ slab->sanity_checks = get_obj("sanity_checks");
+ slab->slab_size = get_obj("slab_size");
+ slab->slabs = get_obj_and_str("slabs", &t);
+ decode_numa_list(slab->numa, t);
+ free(t);
+ slab->store_user = get_obj("store_user");
+ slab->trace = get_obj("trace");
+ slab->alloc_fastpath = get_obj("alloc_fastpath");
+ slab->alloc_slowpath = get_obj("alloc_slowpath");
+ slab->free_fastpath = get_obj("free_fastpath");
+ slab->free_slowpath = get_obj("free_slowpath");
+ slab->free_frozen= get_obj("free_frozen");
+ slab->free_add_partial = get_obj("free_add_partial");
+ slab->free_remove_partial = get_obj("free_remove_partial");
+ slab->alloc_from_partial = get_obj("alloc_from_partial");
+ slab->alloc_slab = get_obj("alloc_slab");
+ slab->alloc_refill = get_obj("alloc_refill");
+ slab->free_slab = get_obj("free_slab");
+ slab->cpuslab_flush = get_obj("cpuslab_flush");
+ slab->deactivate_full = get_obj("deactivate_full");
+ slab->deactivate_empty = get_obj("deactivate_empty");
+ slab->deactivate_to_head = get_obj("deactivate_to_head");
+ slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+ slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+ slab->order_fallback = get_obj("order_fallback");
+ chdir("..");
+ if (slab->name[0] == ':')
+ alias_targets++;
+ slab++;
+ break;
+ default :
+ fatal("Unknown file type %lx\n", de->d_type);
+ }
+ }
+ closedir(dir);
+ slabs = slab - slabinfo;
+ actual_slabs = slabs;
+ aliases = alias - aliasinfo;
+ if (slabs > MAX_SLABS)
+ fatal("Too many slabs\n");
+ if (aliases > MAX_ALIASES)
+ fatal("Too many aliases\n");
+}
+
+static void output_slabs(void)
+{
+ struct slabinfo *slab;
+
+ for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+ if (slab->alias)
+ continue;
+
+
+ if (show_numa)
+ slab_numa(slab, 0);
+ else if (show_track)
+ show_tracking(slab);
+ else if (validate)
+ slab_validate(slab);
+ else if (shrink)
+ slab_shrink(slab);
+ else if (set_debug)
+ slab_debug(slab);
+ else if (show_ops)
+ ops(slab);
+ else if (show_slab)
+ slabcache(slab);
+ else if (show_report)
+ report(slab);
+ }
+}
+
+struct option opts[] = {
+ { "aliases", 0, NULL, 'a' },
+ { "activity", 0, NULL, 'A' },
+ { "debug", 2, NULL, 'd' },
+ { "display-activity", 0, NULL, 'D' },
+ { "empty", 0, NULL, 'e' },
+ { "first-alias", 0, NULL, 'f' },
+ { "help", 0, NULL, 'h' },
+ { "inverted", 0, NULL, 'i'},
+ { "numa", 0, NULL, 'n' },
+ { "ops", 0, NULL, 'o' },
+ { "report", 0, NULL, 'r' },
+ { "shrink", 0, NULL, 's' },
+ { "slabs", 0, NULL, 'l' },
+ { "track", 0, NULL, 't'},
+ { "validate", 0, NULL, 'v' },
+ { "zero", 0, NULL, 'z' },
+ { "1ref", 0, NULL, '1'},
+ { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int err;
+ char *pattern_source;
+
+ page_size = getpagesize();
+
+ while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
+ opts, NULL)) != -1)
+ switch (c) {
+ case '1':
+ show_single_ref = 1;
+ break;
+ case 'a':
+ show_alias = 1;
+ break;
+ case 'A':
+ sort_active = 1;
+ break;
+ case 'd':
+ set_debug = 1;
+ if (!debug_opt_scan(optarg))
+ fatal("Invalid debug option '%s'\n", optarg);
+ break;
+ case 'D':
+ show_activity = 1;
+ break;
+ case 'e':
+ show_empty = 1;
+ break;
+ case 'f':
+ show_first_alias = 1;
+ break;
+ case 'h':
+ usage();
+ return 0;
+ case 'i':
+ show_inverted = 1;
+ break;
+ case 'n':
+ show_numa = 1;
+ break;
+ case 'o':
+ show_ops = 1;
+ break;
+ case 'r':
+ show_report = 1;
+ break;
+ case 's':
+ shrink = 1;
+ break;
+ case 'l':
+ show_slab = 1;
+ break;
+ case 't':
+ show_track = 1;
+ break;
+ case 'v':
+ validate = 1;
+ break;
+ case 'z':
+ skip_zero = 0;
+ break;
+ case 'T':
+ show_totals = 1;
+ break;
+ case 'S':
+ sort_size = 1;
+ break;
+
+ default:
+ fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+ }
+
+ if (!show_slab && !show_alias && !show_track && !show_report
+ && !validate && !shrink && !set_debug && !show_ops)
+ show_slab = 1;
+
+ if (argc > optind)
+ pattern_source = argv[optind];
+ else
+ pattern_source = ".*";
+
+ err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+ if (err)
+ fatal("%s: Invalid pattern '%s' code %d\n",
+ argv[0], pattern_source, err);
+ read_slab_dir();
+ if (show_alias)
+ alias();
+ else
+ if (show_totals)
+ totals();
+ else {
+ link_slabs();
+ rename_slabs();
+ sort_slabs();
+ output_slabs();
+ }
+ return 0;
+}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-mm/tools/vm/slqbinfo.c 2009-09-02 12:14:10.000000000 +0800
@@ -0,0 +1,1047 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ *
+ * Reworked by Lin Ming <ming.m.lin@intel.com> for SLQB
+ *
+ * Compile by:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+ char *name;
+ int align, cache_dma, destroy_by_rcu;
+ int hwcache_align, object_size, objs_per_slab;
+ int slab_size, store_user;
+ int order, poison, reclaim_account, red_zone;
+ int batch;
+ unsigned long objects, slabs, total_objects;
+ unsigned long alloc, alloc_slab_fill, alloc_slab_new;
+ unsigned long free, free_remote;
+ unsigned long claim_remote_list, claim_remote_list_objects;
+ unsigned long flush_free_list, flush_free_list_objects, flush_free_list_remote;
+ unsigned long flush_rfree_list, flush_rfree_list_objects;
+ unsigned long flush_slab_free, flush_slab_partial;
+ int numa[MAX_NODES];
+ int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+int slabs = 0;
+int actual_slabs = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+void usage(void)
+{
+ printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
+ "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+ "-A|--activity Most active slabs first\n"
+ "-d<options>|--debug=<options> Set/Clear Debug options\n"
+ "-D|--display-active Switch line format to activity\n"
+ "-e|--empty Show empty slabs\n"
+ "-h|--help Show usage information\n"
+ "-i|--inverted Inverted list\n"
+ "-l|--slabs Show slabs\n"
+ "-n|--numa Show NUMA information\n"
+ "-o|--ops Show kmem_cache_ops\n"
+ "-s|--shrink Shrink slabs\n"
+ "-r|--report Detailed report on single slabs\n"
+ "-S|--Size Sort by size\n"
+ "-t|--tracking Show alloc/free information\n"
+ "-T|--Totals Show summary information\n"
+ "-v|--validate Validate slabs\n"
+ "-z|--zero Include empty slabs\n"
+ "\nValid debug options (FZPUT may be combined)\n"
+ "a / A Switch on all debug options (=FZUP)\n"
+ "- Switch off all debug options\n"
+ "f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
+ "z / Z Redzoning\n"
+ "p / P Poisoning\n"
+ "u / U Tracking\n"
+ "t / T Tracing\n"
+ );
+}
+
+unsigned long read_obj(const char *name)
+{
+ FILE *f = fopen(name, "r");
+
+ if (!f)
+ buffer[0] = 0;
+ else {
+ if (!fgets(buffer, sizeof(buffer), f))
+ buffer[0] = 0;
+ fclose(f);
+ if (buffer[strlen(buffer)] == '\n')
+ buffer[strlen(buffer)] = 0;
+ }
+ return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+unsigned long get_obj(const char *name)
+{
+ if (!read_obj(name))
+ return 0;
+
+ return atol(buffer);
+}
+
+unsigned long get_obj_and_str(const char *name, char **x)
+{
+ unsigned long result = 0;
+ char *p;
+
+ *x = NULL;
+
+ if (!read_obj(name)) {
+ x = NULL;
+ return 0;
+ }
+ result = strtoul(buffer, &p, 10);
+ while (*p == ' ')
+ p++;
+ if (*p)
+ *x = strdup(p);
+ return result;
+}
+
+void set_obj(struct slabinfo *s, const char *name, int n)
+{
+ char x[100];
+ FILE *f;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "w");
+ if (!f)
+ fatal("Cannot write to %s\n", x);
+
+ fprintf(f, "%d\n", n);
+ fclose(f);
+}
+
+unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+ char x[100];
+ FILE *f;
+ size_t l;
+
+ snprintf(x, 100, "%s/%s", s->name, name);
+ f = fopen(x, "r");
+ if (!f) {
+ buffer[0] = 0;
+ l = 0;
+ } else {
+ l = fread(buffer, 1, sizeof(buffer), f);
+ buffer[l] = 0;
+ fclose(f);
+ }
+ return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+int store_size(char *buffer, unsigned long value)
+{
+ unsigned long divisor = 1;
+ char trailer = 0;
+ int n;
+
+ if (value > 1000000000UL) {
+ divisor = 100000000UL;
+ trailer = 'G';
+ } else if (value > 1000000UL) {
+ divisor = 100000UL;
+ trailer = 'M';
+ } else if (value > 1000UL) {
+ divisor = 100;
+ trailer = 'K';
+ }
+
+ value /= divisor;
+ n = sprintf(buffer, "%ld",value);
+ if (trailer) {
+ buffer[n] = trailer;
+ n++;
+ buffer[n] = 0;
+ }
+ if (divisor != 1) {
+ memmove(buffer + n - 2, buffer + n - 3, 4);
+ buffer[n-2] = '.';
+ n++;
+ }
+ return n;
+}
+
+void decode_numa_list(int *numa, char *t)
+{
+ int node;
+ int nr;
+
+ memset(numa, 0, MAX_NODES * sizeof(int));
+
+ if (!t)
+ return;
+
+ while (*t == 'N') {
+ t++;
+ node = strtoul(t, &t, 10);
+ if (*t == '=') {
+ t++;
+ nr = strtoul(t, &t, 10);
+ numa[node] = nr;
+ if (node > highest_node)
+ highest_node = node;
+ }
+ while (*t == ' ')
+ t++;
+ }
+}
+
+void slab_validate(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "validate", 1);
+}
+
+void slab_shrink(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+void first_line(void)
+{
+ if (show_activity)
+ printf("Name Objects Alloc Free %%Fill %%New "
+ "FlushR %%FlushR FlushR_Objs O\n");
+ else
+ printf("Name Objects Objsize Space "
+ " O/S O %%Ef Batch Flg\n");
+}
+
+unsigned long slab_size(struct slabinfo *s)
+{
+ return s->slabs * (page_size << s->order);
+}
+
+unsigned long slab_activity(struct slabinfo *s)
+{
+ return s->alloc + s->free;
+}
+
+void slab_numa(struct slabinfo *s, int mode)
+{
+ int node;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (!highest_node) {
+ printf("\n%s: No NUMA information available.\n", s->name);
+ return;
+ }
+
+ if (skip_zero && !s->slabs)
+ return;
+
+ if (!line) {
+ printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+ for(node = 0; node <= highest_node; node++)
+ printf(" %4d", node);
+ printf("\n----------------------");
+ for(node = 0; node <= highest_node; node++)
+ printf("-----");
+ printf("\n");
+ }
+ printf("%-21s ", mode ? "All slabs" : s->name);
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ if (mode) {
+ printf("%-21s ", "Partial slabs");
+ for(node = 0; node <= highest_node; node++) {
+ char b[20];
+
+ store_size(b, s->numa_partial[node]);
+ printf(" %4s", b);
+ }
+ printf("\n");
+ }
+ line++;
+}
+
+void show_tracking(struct slabinfo *s)
+{
+ printf("\n%s: Kernel object allocation\n", s->name);
+ printf("-----------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "alloc_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+ printf("\n%s: Kernel object freeing\n", s->name);
+ printf("------------------------------------------------------------------------\n");
+ if (read_slab_obj(s, "free_calls"))
+ printf(buffer);
+ else
+ printf("No Data\n");
+
+}
+
+void ops(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (read_slab_obj(s, "ops")) {
+ printf("\n%s: kmem_cache operations\n", s->name);
+ printf("--------------------------------------------\n");
+ printf(buffer);
+ } else
+ printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+const char *onoff(int x)
+{
+ if (x)
+ return "On ";
+ return "Off";
+}
+
+void slab_stats(struct slabinfo *s)
+{
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc;
+ total_free = s->free;
+
+ if (!total_alloc)
+ return;
+
+ printf("\n");
+ printf("Slab Perf Counter\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Alloc: %8lu, partial %8lu, page allocator %8lu\n",
+ total_alloc,
+ s->alloc_slab_fill, s->alloc_slab_new);
+ printf("Free: %8lu, partial %8lu, page allocator %8lu, remote %5lu\n",
+ total_free,
+ s->flush_slab_partial,
+ s->flush_slab_free,
+ s->free_remote);
+ printf("Claim: %8lu, objects %8lu\n",
+ s->claim_remote_list,
+ s->claim_remote_list_objects);
+ printf("Flush: %8lu, objects %8lu, remote: %8lu\n",
+ s->flush_free_list,
+ s->flush_free_list_objects,
+ s->flush_free_list_remote);
+ printf("FlushR:%8lu, objects %8lu\n",
+ s->flush_rfree_list,
+ s->flush_rfree_list_objects);
+}
+
+void report(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ printf("\nSlabcache: %-20s Order : %2d Objects: %lu\n",
+ s->name, s->order, s->objects);
+ if (s->hwcache_align)
+ printf("** Hardware cacheline aligned\n");
+ if (s->cache_dma)
+ printf("** Memory is allocated in a special DMA zone\n");
+ if (s->destroy_by_rcu)
+ printf("** Slabs are destroyed via RCU\n");
+ if (s->reclaim_account)
+ printf("** Reclaim accounting active\n");
+
+ printf("\nSizes (bytes) Slabs Debug Memory\n");
+ printf("------------------------------------------------------------------------\n");
+ printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
+ s->object_size, s->slabs, "N/A",
+ s->slabs * (page_size << s->order));
+ printf("SlabObj: %7d Full : %7s Redzoning : %s Used : %7ld\n",
+ s->slab_size, "N/A",
+ onoff(s->red_zone), s->objects * s->object_size);
+ printf("SlabSiz: %7d Partial: %7s Poisoning : %s Loss : %7ld\n",
+ page_size << s->order, "N/A", onoff(s->poison),
+ s->slabs * (page_size << s->order) - s->objects * s->object_size);
+ printf("Loss : %7d CpuSlab: %7s Tracking : %s Lalig: %7ld\n",
+ s->slab_size - s->object_size, "N/A", onoff(s->store_user),
+ (s->slab_size - s->object_size) * s->objects);
+ printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
+ s->align, s->objs_per_slab, "N/A",
+ ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+ s->slabs);
+
+ ops(s);
+ show_tracking(s);
+ slab_numa(s, 1);
+ slab_stats(s);
+}
+
+void slabcache(struct slabinfo *s)
+{
+ char size_str[20];
+ char flags[20];
+ char *p = flags;
+
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (actual_slabs == 1) {
+ report(s);
+ return;
+ }
+
+ if (skip_zero && !show_empty && !s->slabs)
+ return;
+
+ if (show_empty && s->slabs)
+ return;
+
+ store_size(size_str, slab_size(s));
+
+ if (!line++)
+ first_line();
+
+ if (s->cache_dma)
+ *p++ = 'd';
+ if (s->hwcache_align)
+ *p++ = 'A';
+ if (s->poison)
+ *p++ = 'P';
+ if (s->reclaim_account)
+ *p++ = 'a';
+ if (s->red_zone)
+ *p++ = 'Z';
+ if (s->store_user)
+ *p++ = 'U';
+
+ *p = 0;
+ if (show_activity) {
+ unsigned long total_alloc;
+ unsigned long total_free;
+
+ total_alloc = s->alloc;
+ total_free = s->free;
+
+ printf("%-21s %8ld %10ld %10ld %5ld %5ld %7ld %5ld %7ld %8d\n",
+ s->name, s->objects,
+ total_alloc, total_free,
+ total_alloc ? (s->alloc_slab_fill * 100 / total_alloc) : 0,
+ total_alloc ? (s->alloc_slab_new * 100 / total_alloc) : 0,
+ s->flush_rfree_list,
+ s->flush_rfree_list * 100 / (total_alloc + total_free),
+ s->flush_rfree_list_objects,
+ s->order);
+ }
+ else
+ printf("%-21s %8ld %7d %8s %4d %1d %3ld %4d %s\n",
+ s->name, s->objects, s->object_size, size_str,
+ s->objs_per_slab, s->order,
+ s->slabs ? (s->objects * s->object_size * 100) /
+ (s->slabs * (page_size << s->order)) : 100,
+ s->batch, flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+int debug_opt_scan(char *opt)
+{
+ if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+ return 1;
+
+ if (strcasecmp(opt, "a") == 0) {
+ sanity = 1;
+ poison = 1;
+ redzone = 1;
+ tracking = 1;
+ return 1;
+ }
+
+ for ( ; *opt; opt++)
+ switch (*opt) {
+ case 'F' : case 'f':
+ if (sanity)
+ return 0;
+ sanity = 1;
+ break;
+ case 'P' : case 'p':
+ if (poison)
+ return 0;
+ poison = 1;
+ break;
+
+ case 'Z' : case 'z':
+ if (redzone)
+ return 0;
+ redzone = 1;
+ break;
+
+ case 'U' : case 'u':
+ if (tracking)
+ return 0;
+ tracking = 1;
+ break;
+
+ case 'T' : case 't':
+ if (tracing)
+ return 0;
+ tracing = 1;
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+int slab_empty(struct slabinfo *s)
+{
+ if (s->objects > 0)
+ return 0;
+
+ /*
+ * We may still have slabs even if there are no objects. Shrinking will
+ * remove them.
+ */
+ if (s->slabs != 0)
+ set_obj(s, "shrink", 1);
+
+ return 1;
+}
+
+void slab_debug(struct slabinfo *s)
+{
+ if (strcmp(s->name, "*") == 0)
+ return;
+
+ if (redzone && !s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+ }
+ if (!redzone && s->red_zone) {
+ if (slab_empty(s))
+ set_obj(s, "red_zone", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+ }
+ if (poison && !s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+ }
+ if (!poison && s->poison) {
+ if (slab_empty(s))
+ set_obj(s, "poison", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+ }
+ if (tracking && !s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 1);
+ else
+ fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+ }
+ if (!tracking && s->store_user) {
+ if (slab_empty(s))
+ set_obj(s, "store_user", 0);
+ else
+ fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+ }
+}
+
+void totals(void)
+{
+ struct slabinfo *s;
+
+ int used_slabs = 0;
+ char b1[20], b2[20], b3[20], b4[20];
+ unsigned long long max = 1ULL << 63;
+
+ /* Object size */
+ unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+ /* Number of slabs in a slab cache */
+ unsigned long long min_slabs = max, max_slabs = 0,
+ avg_slabs, total_slabs = 0;
+
+ /* Size of the whole slab */
+ unsigned long long min_size = max, max_size = 0,
+ avg_size, total_size = 0;
+
+ /* Bytes used for object storage in a slab */
+ unsigned long long min_used = max, max_used = 0,
+ avg_used, total_used = 0;
+
+ /* Waste: Bytes used for alignment and padding */
+ unsigned long long min_waste = max, max_waste = 0,
+ avg_waste, total_waste = 0;
+ /* Number of objects in a slab */
+ unsigned long long min_objects = max, max_objects = 0,
+ avg_objects, total_objects = 0;
+ /* Waste per object */
+ unsigned long long min_objwaste = max,
+ max_objwaste = 0, avg_objwaste,
+ total_objwaste = 0;
+
+ /* Memory per object */
+ unsigned long long min_memobj = max,
+ max_memobj = 0, avg_memobj,
+ total_objsize = 0;
+
+ for (s = slabinfo; s < slabinfo + slabs; s++) {
+ unsigned long long size;
+ unsigned long used;
+ unsigned long long wasted;
+ unsigned long long objwaste;
+
+ if (!s->slabs || !s->objects)
+ continue;
+
+ used_slabs++;
+
+ size = slab_size(s);
+ used = s->objects * s->object_size;
+ wasted = size - used;
+ objwaste = s->slab_size - s->object_size;
+
+ if (s->object_size < min_objsize)
+ min_objsize = s->object_size;
+ if (s->slabs < min_slabs)
+ min_slabs = s->slabs;
+ if (size < min_size)
+ min_size = size;
+ if (wasted < min_waste)
+ min_waste = wasted;
+ if (objwaste < min_objwaste)
+ min_objwaste = objwaste;
+ if (s->objects < min_objects)
+ min_objects = s->objects;
+ if (used < min_used)
+ min_used = used;
+ if (s->slab_size < min_memobj)
+ min_memobj = s->slab_size;
+
+ if (s->object_size > max_objsize)
+ max_objsize = s->object_size;
+ if (s->slabs > max_slabs)
+ max_slabs = s->slabs;
+ if (size > max_size)
+ max_size = size;
+ if (wasted > max_waste)
+ max_waste = wasted;
+ if (objwaste > max_objwaste)
+ max_objwaste = objwaste;
+ if (s->objects > max_objects)
+ max_objects = s->objects;
+ if (used > max_used)
+ max_used = used;
+ if (s->slab_size > max_memobj)
+ max_memobj = s->slab_size;
+
+ total_slabs += s->slabs;
+ total_size += size;
+ total_waste += wasted;
+
+ total_objects += s->objects;
+ total_used += used;
+
+ total_objwaste += s->objects * objwaste;
+ total_objsize += s->objects * s->slab_size;
+ }
+
+ if (!total_objects) {
+ printf("No objects\n");
+ return;
+ }
+ if (!used_slabs) {
+ printf("No slabs\n");
+ return;
+ }
+
+ /* Per slab averages */
+ avg_slabs = total_slabs / used_slabs;
+ avg_size = total_size / used_slabs;
+ avg_waste = total_waste / used_slabs;
+
+ avg_objects = total_objects / used_slabs;
+ avg_used = total_used / used_slabs;
+
+ /* Per object object sizes */
+ avg_objsize = total_used / total_objects;
+ avg_objwaste = total_objwaste / total_objects;
+ avg_memobj = total_objsize / total_objects;
+
+ printf("Slabcache Totals\n");
+ printf("----------------\n");
+ printf("Slabcaches : %3d Active: %3d\n",
+ slabs, used_slabs);
+
+ store_size(b1, total_size);store_size(b2, total_waste);
+ store_size(b3, total_waste * 100 / total_used);
+ printf("Memory used: %6s # Loss : %6s MRatio:%6s%%\n", b1, b2, b3);
+
+ store_size(b1, total_objects);
+ printf("# Objects : %6s\n", b1);
+
+ printf("\n");
+ printf("Per Cache Average Min Max Total\n");
+ printf("---------------------------------------------------------\n");
+
+ store_size(b1, avg_objects);store_size(b2, min_objects);
+ store_size(b3, max_objects);store_size(b4, total_objects);
+ printf("#Objects %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_slabs);store_size(b2, min_slabs);
+ store_size(b3, max_slabs);store_size(b4, total_slabs);
+ printf("#Slabs %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_size);store_size(b2, min_size);
+ store_size(b3, max_size);store_size(b4, total_size);
+ printf("Memory %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_used);store_size(b2, min_used);
+ store_size(b3, max_used);store_size(b4, total_used);
+ printf("Used %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ store_size(b1, avg_waste);store_size(b2, min_waste);
+ store_size(b3, max_waste);store_size(b4, total_waste);
+ printf("Loss %10s %10s %10s %10s\n",
+ b1, b2, b3, b4);
+
+ printf("\n");
+ printf("Per Object Average Min Max\n");
+ printf("---------------------------------------------\n");
+
+ store_size(b1, avg_memobj);store_size(b2, min_memobj);
+ store_size(b3, max_memobj);
+ printf("Memory %10s %10s %10s\n",
+ b1, b2, b3);
+ store_size(b1, avg_objsize);store_size(b2, min_objsize);
+ store_size(b3, max_objsize);
+ printf("User %10s %10s %10s\n",
+ b1, b2, b3);
+
+ store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+ store_size(b3, max_objwaste);
+ printf("Loss %10s %10s %10s\n",
+ b1, b2, b3);
+}
+
+void sort_slabs(void)
+{
+ struct slabinfo *s1,*s2;
+
+ for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+ for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+ int result;
+
+ if (sort_size)
+ result = slab_size(s1) < slab_size(s2);
+ else if (sort_active)
+ result = slab_activity(s1) < slab_activity(s2);
+ else
+ result = strcasecmp(s1->name, s2->name);
+
+ if (show_inverted)
+ result = -result;
+
+ if (result > 0) {
+ struct slabinfo t;
+
+ memcpy(&t, s1, sizeof(struct slabinfo));
+ memcpy(s1, s2, sizeof(struct slabinfo));
+ memcpy(s2, &t, sizeof(struct slabinfo));
+ }
+ }
+ }
+}
+
+int slab_mismatch(char *slab)
+{
+ return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+void read_slab_dir(void)
+{
+ DIR *dir;
+ struct dirent *de;
+ struct slabinfo *slab = slabinfo;
+ char *t;
+
+ if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+ fatal("SYSFS support for SLUB not active\n");
+
+ dir = opendir(".");
+ while ((de = readdir(dir))) {
+ if (de->d_name[0] == '.' ||
+ (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+ continue;
+ switch (de->d_type) {
+ case DT_DIR:
+ if (chdir(de->d_name))
+ fatal("Unable to access slab %s\n", slab->name);
+ slab->name = strdup(de->d_name);
+ slab->align = get_obj("align");
+ slab->cache_dma = get_obj("cache_dma");
+ slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+ slab->hwcache_align = get_obj("hwcache_align");
+ slab->object_size = get_obj("object_size");
+ slab->objects = get_obj("objects");
+ slab->total_objects = get_obj("total_objects");
+ slab->objs_per_slab = get_obj("objs_per_slab");
+ slab->order = get_obj("order");
+ slab->poison = get_obj("poison");
+ slab->reclaim_account = get_obj("reclaim_account");
+ slab->red_zone = get_obj("red_zone");
+ slab->slab_size = get_obj("slab_size");
+ slab->slabs = get_obj_and_str("slabs", &t);
+ decode_numa_list(slab->numa, t);
+ free(t);
+ slab->store_user = get_obj("store_user");
+ slab->batch = get_obj("batch");
+ slab->alloc = get_obj("alloc");
+ slab->alloc_slab_fill = get_obj("alloc_slab_fill");
+ slab->alloc_slab_new = get_obj("alloc_slab_new");
+ slab->free = get_obj("free");
+ slab->free_remote = get_obj("free_remote");
+ slab->claim_remote_list = get_obj("claim_remote_list");
+ slab->claim_remote_list_objects = get_obj("claim_remote_list_objects");
+ slab->flush_free_list = get_obj("flush_free_list");
+ slab->flush_free_list_objects = get_obj("flush_free_list_objects");
+ slab->flush_free_list_remote = get_obj("flush_free_list_remote");
+ slab->flush_rfree_list = get_obj("flush_rfree_list");
+ slab->flush_rfree_list_objects = get_obj("flush_rfree_list_objects");
+ slab->flush_slab_free = get_obj("flush_slab_free");
+ slab->flush_slab_partial = get_obj("flush_slab_partial");
+
+ chdir("..");
+ slab++;
+ break;
+ default :
+ fatal("Unknown file type %lx\n", de->d_type);
+ }
+ }
+ closedir(dir);
+ slabs = slab - slabinfo;
+ actual_slabs = slabs;
+ if (slabs > MAX_SLABS)
+ fatal("Too many slabs\n");
+}
+
+void output_slabs(void)
+{
+ struct slabinfo *slab;
+
+ for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+ if (show_numa)
+ slab_numa(slab, 0);
+ else if (show_track)
+ show_tracking(slab);
+ else if (validate)
+ slab_validate(slab);
+ else if (shrink)
+ slab_shrink(slab);
+ else if (set_debug)
+ slab_debug(slab);
+ else if (show_ops)
+ ops(slab);
+ else if (show_slab)
+ slabcache(slab);
+ else if (show_report)
+ report(slab);
+ }
+}
+
+struct option opts[] = {
+ { "activity", 0, NULL, 'A' },
+ { "debug", 2, NULL, 'd' },
+ { "display-activity", 0, NULL, 'D' },
+ { "empty", 0, NULL, 'e' },
+ { "help", 0, NULL, 'h' },
+ { "inverted", 0, NULL, 'i'},
+ { "numa", 0, NULL, 'n' },
+ { "ops", 0, NULL, 'o' },
+ { "report", 0, NULL, 'r' },
+ { "shrink", 0, NULL, 's' },
+ { "slabs", 0, NULL, 'l' },
+ { "track", 0, NULL, 't'},
+ { "validate", 0, NULL, 'v' },
+ { "zero", 0, NULL, 'z' },
+ { "1ref", 0, NULL, '1'},
+ { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int err;
+ char *pattern_source;
+
+ page_size = getpagesize();
+
+ while ((c = getopt_long(argc, argv, "Ad::Dehil1noprstvzTS",
+ opts, NULL)) != -1)
+ switch (c) {
+ case 'A':
+ sort_active = 1;
+ break;
+ case 'd':
+ set_debug = 1;
+ if (!debug_opt_scan(optarg))
+ fatal("Invalid debug option '%s'\n", optarg);
+ break;
+ case 'D':
+ show_activity = 1;
+ break;
+ case 'e':
+ show_empty = 1;
+ break;
+ case 'h':
+ usage();
+ return 0;
+ case 'i':
+ show_inverted = 1;
+ break;
+ case 'n':
+ show_numa = 1;
+ break;
+ case 'o':
+ show_ops = 1;
+ break;
+ case 'r':
+ show_report = 1;
+ break;
+ case 's':
+ shrink = 1;
+ break;
+ case 'l':
+ show_slab = 1;
+ break;
+ case 't':
+ show_track = 1;
+ break;
+ case 'v':
+ validate = 1;
+ break;
+ case 'z':
+ skip_zero = 0;
+ break;
+ case 'T':
+ show_totals = 1;
+ break;
+ case 'S':
+ sort_size = 1;
+ break;
+
+ default:
+ fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+ }
+
+ if (!show_slab && !show_track && !show_report
+ && !validate && !shrink && !set_debug && !show_ops)
+ show_slab = 1;
+
+ if (argc > optind)
+ pattern_source = argv[optind];
+ else
+ pattern_source = ".*";
+
+ err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+ if (err)
+ fatal("%s: Invalid pattern '%s' code %d\n",
+ argv[0], pattern_source, err);
+ read_slab_dir();
+ if (show_totals)
+ totals();
+ else {
+ sort_slabs();
+ output_slabs();
+ }
+ return 0;
+}
--- linux-mm.orig/Documentation/vm/Makefile 2009-09-02 12:14:09.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1,8 +0,0 @@
-# kbuild trick to avoid linker error. Can be omitted if a module is built.
-obj- := dummy.o
-
-# List of programs to build
-hostprogs-y := slabinfo
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
--- linux-mm.orig/Documentation/vm/.gitignore 2009-09-02 12:14:09.000000000 +0800
+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-slabinfo
--- linux-mm.orig/Documentation/vm/00-INDEX 2009-09-02 12:13:54.000000000 +0800
+++ linux-mm/Documentation/vm/00-INDEX 2009-09-02 12:14:10.000000000 +0800
@@ -18,7 +18,5 @@ overcommit-accounting
- description of the Linux kernels overcommit handling modes.
page_migration
- description of page migration in NUMA systems.
-slabinfo.c
- - source code for a tool to get reports about slabs.
slub.txt
- a short users guide for SLUB.
--
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC][PATCH 2/4 v2] slabinfo: move from Documentation/vm/ to tools/vm/
2009-09-02 4:17 ` [RFC][PATCH 2/4 v2] " Wu Fengguang
@ 2009-09-02 18:04 ` Christoph Lameter
0 siblings, 0 replies; 7+ messages in thread
From: Christoph Lameter @ 2009-09-02 18:04 UTC (permalink / raw)
To: Wu Fengguang
Cc: Andrew Morton, LKML, Lin, Ming M, Nick Piggin, KOSAKI Motohiro,
Randy Dunlap, Chris Wright, Huang, Ying, Josh Triplett,
Andi Kleen, linux-mm@kvack.org
Acked-by: Christoph Lameter <cl@linux-foundation.org>
--
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Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2009-09-02 14:11 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-09-02 3:41 [RFC][PATCH 0/4] move tools in Documentation/vm/ to tools/vm/ Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 1/4] page-types: move from " Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 2/4] slabinfo: " Wu Fengguang
2009-09-02 4:17 ` [RFC][PATCH 2/4 v2] " Wu Fengguang
2009-09-02 18:04 ` Christoph Lameter
2009-09-02 3:41 ` [RFC][PATCH 3/4] pagemap: export KPF_HWPOISON Wu Fengguang
2009-09-02 3:41 ` [RFC][PATCH 4/4] pagemap: document KPF_KSM and show it in page-types Wu Fengguang
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