[PATCH V6 11/16] perf mem: Support data page size

Kan Liang
2020-08-10T21:28:14Z

Add option --data-page-size in "perf mem" to record/report data page
size.

Here are some examples.
perf mem --phys-data --data-page-size report -D

# PID, TID, IP, ADDR, PHYS ADDR, DATA PAGE SIZE, LOCAL WEIGHT, DSRC,
# SYMBOL
20134 20134 0xffffffffb5bd2fd0 0x016ffff9a274e96a308 0x000000044e96a308
4K 1168 0x5080144
/lib/modules/4.18.0-rc7+/build/vmlinux:perf_ctx_unlock
20134 20134 0xffffffffb63f645c 0xffffffffb752b814 0xcfb52b814 2M 225
0x26a100142 /lib/modules/4.18.0-rc7+/build/vmlinux:_raw_spin_lock
20134 20134 0xffffffffb660300c 0xfffffe00016b8bb0 0x0 4K 0 0x5080144
/lib/modules/4.18.0-rc7+/build/vmlinux:__x86_indirect_thunk_rax

perf mem --phys-data --data-page-size report --stdio

# To display the perf.data header info, please use
# --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 5K of event 'cpu/mem-loads,ldlat=30/P'
# Total weight : 281234
# Sort order :
# mem,sym,dso,symbol_daddr,dso_daddr,tlb,locked,phys_daddr,data_page_size
#
# Overhead Samples Memory access Symbol
# Shared Object Data Symbol Data
# Object TLB access Locked Data Physical
# Address Data Page Size
# ........ ............ ........................
# ................................ ................
# ........................................... .......................
# ...................... ...... ......................
# ......................
#
28.54% 1826 L1 or L1 hit [k]
__x86_indirect_thunk_rax [kernel.vmlinux] [k] 0xffffb0df31b0ff28
[unknown] L1 or L2 hit No [k]
0000000000000000 4K
6.02% 256 L1 or L1 hit [.] touch_buffer
dtlb [.] 0x00007ffd50109da8 [stack]
L1 or L2 hit No [.] 0x000000042454ada8 4K
3.23% 5 L1 or L1 hit [k] clear_huge_page
[kernel.vmlinux] [k] 0xffff9a2753b8ce60 [unknown]
L1 or L2 hit No [k] 0x0000000453b8ce60 2M
2.98% 4 L1 or L1 hit [k] clear_page_erms
[kernel.vmlinux] [k] 0xffffb0df31b0fd00 [unknown]
L1 or L2 hit No [k] 0000000000000000 4K

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
tools/perf/Documentation/perf-mem.txt | 3 +++
tools/perf/builtin-mem.c | 20 +++++++++++++++++++-
2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
index 199ea0f0a6c0..66177511c5c4 100644
--- a/tools/perf/Documentation/perf-mem.txt
+++ b/tools/perf/Documentation/perf-mem.txt
@@ -63,6 +63,9 @@ OPTIONS
--phys-data::
Record/Report sample physical addresses

+--data-page-size::
+ Record/Report sample data address page size
+
RECORD OPTIONS
--------------
-e::
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 200ff7c9d7b7..433e02ab45eb 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -29,6 +29,7 @@ struct perf_mem {
bool dump_raw;
bool force;
bool phys_addr;
+ bool data_page_size;
int operation;
const char *cpu_list;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
@@ -100,6 +101,9 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
if (mem->phys_addr)
rec_argv[i++] = "--phys-data";

+ if (mem->data_page_size)
+ rec_argv[i++] = "--data-page-size";
+
for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
if (!perf_mem_events[j].record)
continue;
@@ -148,6 +152,7 @@ dump_raw_samples(struct perf_tool *tool,
struct perf_mem *mem = container_of(tool, struct perf_mem, tool);
struct addr_location al;
const char *fmt, *field_sep;
+ char str[PAGE_SIZE_NAME_LEN];

if (machine__resolve(machine, &al, sample) < 0) {
fprintf(stderr, "problem processing %d event, skipping it.\n",
@@ -184,6 +189,12 @@ dump_raw_samples(struct perf_tool *tool,
symbol_conf.field_sep);
}

+ if (mem->data_page_size) {
+ printf("%s%s",
+ get_page_size_name(sample->data_page_size, str),
+ symbol_conf.field_sep);
+ }
+
if (field_sep)
fmt = "%"PRIu64"%s0x%"PRIx64"%s%s:%s\n";
else
@@ -240,6 +251,9 @@ static int report_raw_events(struct perf_mem *mem)
if (mem->phys_addr)
printf("PHYS ADDR, ");

+ if (mem->data_page_size)
+ printf("DATA PAGE SIZE, ");
+
printf("LOCAL WEIGHT, DSRC, SYMBOL\n");

ret = perf_session__process_events(session);
@@ -250,7 +264,7 @@ static int report_raw_events(struct perf_mem *mem)
}
static char *get_sort_order(struct perf_mem *mem)
{
- bool has_extra_options = mem->phys_addr ? true : false;
+ bool has_extra_options = (mem->phys_addr | mem->data_page_size) ? true : false;
char sort[128];

/*
@@ -269,6 +283,9 @@ static char *get_sort_order(struct perf_mem *mem)
if (mem->phys_addr)
strcat(sort, ",phys_daddr");

+ if (mem->data_page_size)
+ strcat(sort, ",data_page_size");
+
return strdup(sort);
}

@@ -410,6 +427,7 @@ int cmd_mem(int argc, const char **argv)
" between columns '.' is reserved."),
OPT_BOOLEAN('f', "force", &mem.force, "don't complain, do it"),
OPT_BOOLEAN('p', "phys-data", &mem.phys_addr, "Record/Report sample physical addresses"),
+ OPT_BOOLEAN(0, "data-page-size", &mem.data_page_size, "Record/Report sample data address page size"),
OPT_END()
};
const char *const mem_subcommands[] = { "record", "report", NULL };
--
2.17.1