* [LTP] [PATCH v4 1/3] mm/thp: new case thp04.c
2013-04-16 14:30 [LTP] [PATCH v5 0/3] mm/thp: add two new case Zhouping Liu
@ 2013-04-16 14:30 ` Zhouping Liu
2013-04-16 14:30 ` [LTP] [PATCH v4 2/3] lib/mem: introduce a new function set_global_mempolicy() Zhouping Liu
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: Zhouping Liu @ 2013-04-16 14:30 UTC (permalink / raw)
To: LTP List
The case is desinged to test THP functionality.
when one process allocate hugepage aligned anonymous pages,
kernel thread 'khugepaged' controlled by sysfs knobs
/sys/kernel/mm/transparent_hugepage/* will scan them, and make
them as transparent hugepage if they are suited, you can find out
how many transparent hugepages are there in one process from
/proc/<pid>/smaps, among the file contents, 'AnonHugePages' entry
stand for transparent hugepage.
Tested-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Zhouping Liu <zliu@redhat.com>
---
runtest/mm | 3 +
testcases/kernel/mem/include/mem.h | 11 +++
testcases/kernel/mem/lib/mem.c | 188 +++++++++++++++++++++++++++++++++++++
testcases/kernel/mem/thp/thp04.c | 142 ++++++++++++++++++++++++++++
4 files changed, 344 insertions(+)
create mode 100644 testcases/kernel/mem/thp/thp04.c
diff --git a/runtest/mm b/runtest/mm
index 56b83f8..3fbb20f 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -84,6 +84,9 @@ swapping01 swapping01 -i 5
thp01 thp01 -I 120
thp02 thp02
thp03 thp03
+thp04_1 thp04
+thp04_2 thp04 -n 10 -N 20
+thp04_3 thp04 -n 1 -N 300
vma01 vma01
vma02 vma02
diff --git a/testcases/kernel/mem/include/mem.h b/testcases/kernel/mem/include/mem.h
index fdf558e..cc8b86c 100644
--- a/testcases/kernel/mem/include/mem.h
+++ b/testcases/kernel/mem/include/mem.h
@@ -32,6 +32,17 @@ void testoom(int mempolicy, int lite);
#define PATH_KSM "/sys/kernel/mm/ksm/"
+/* THP */
+
+#define PATH_THP "/sys/kernel/mm/transparent_hugepage/"
+#define PATH_KHPD PATH_THP "khugepaged/"
+
+int opt_nr_children, opt_nr_thps;
+char *opt_nr_children_str, *opt_nr_thps_str;
+void test_transparent_hugepage(int nr_children, int nr_thps, int hg_aligned);
+void check_thp_options(int *nr_children, int *nr_thps);
+void thp_usage(void);
+
/* HUGETLB */
#define PATH_SHMMAX "/proc/sys/kernel/shmmax"
diff --git a/testcases/kernel/mem/lib/mem.c b/testcases/kernel/mem/lib/mem.c
index c9525e5..fa5694a 100644
--- a/testcases/kernel/mem/lib/mem.c
+++ b/testcases/kernel/mem/lib/mem.c
@@ -501,6 +501,194 @@ void ksm_usage(void)
printf(" -u Memory allocation unit in MB\n");
}
+/* THP */
+
+static int alloc_transparent_hugepages(int nr_thps, int hg_aligned)
+{
+ unsigned long hugepagesize, size;
+ void *addr;
+ int ret;
+
+ hugepagesize = read_meminfo("Hugepagesize:") * KB;
+ size = nr_thps * hugepagesize;
+
+ if (hg_aligned) {
+ ret = posix_memalign(&addr, hugepagesize, size);
+ if (ret != 0) {
+ printf("posix_memalign failed\n");
+ return -1;
+ }
+ } else {
+ addr = mmap(NULL, size, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANON, -1, 0);
+ if (addr == MAP_FAILED) {
+ perror("mmap");
+ return -1;
+ }
+ }
+
+ memset(addr, 10, size);
+
+ tst_resm(TINFO, "child[%d] stop here", getpid());
+ /*
+ * stop here, until the father finish to calculate
+ * all the transparent hugepages.
+ */
+ if (raise(SIGSTOP) == -1) {
+ perror("kill");
+ return -1;
+ }
+
+ return 0;
+}
+
+static void khugepaged_scan_done(void)
+{
+ int changing = 1, count = 0, interval;
+ long old_pages_collapsed, old_max_ptes_none, old_pages_to_scan;
+ long pages_collapsed = 0, max_ptes_none = 0, pages_to_scan = 0;
+
+ /*
+ * as 'khugepaged' run 100% during testing, so 5s is an
+ * enough interval for us to recognize if 'khugepaged'
+ * finish scanning proceses' anonymous hugepages or not.
+ */
+ interval = 5;
+
+ while (changing) {
+ sleep(interval);
+ count++;
+
+ SAFE_FILE_SCANF(cleanup, PATH_KHPD "pages_collapsed",
+ "%ld", &pages_collapsed);
+ SAFE_FILE_SCANF(cleanup, PATH_KHPD "max_ptes_none",
+ "%ld", &max_ptes_none);
+ SAFE_FILE_SCANF(cleanup, PATH_KHPD "pages_to_scan",
+ "%ld", &pages_to_scan);
+
+ if (pages_collapsed != old_pages_collapsed ||
+ max_ptes_none != old_max_ptes_none ||
+ pages_to_scan != old_pages_to_scan) {
+ old_pages_collapsed = pages_collapsed;
+ old_max_ptes_none = max_ptes_none;
+ old_pages_to_scan = pages_to_scan;
+ } else {
+ changing = 0;
+ }
+ }
+
+ tst_resm(TINFO, "khugepaged daemon takes %ds to scan all thp pages",
+ count * interval);
+}
+
+static void verify_thp_size(int *children, int nr_children, int nr_thps)
+{
+ FILE *fp;
+ char path[BUFSIZ], buf[BUFSIZ], line[BUFSIZ];
+ int i, ret;
+ long expect_thps; /* the amount of per child's transparent hugepages */
+ long val, actual_thps;
+ long hugepagesize;
+
+ hugepagesize = read_meminfo("Hugepagesize:");
+ expect_thps = nr_thps * hugepagesize;
+
+ for (i = 0; i < nr_children; i++) {
+ actual_thps = 0;
+
+ snprintf(path, BUFSIZ, "/proc/%d/smaps", children[i]);
+ fp = fopen(path, "r");
+ while (fgets(line, BUFSIZ, fp) != NULL) {
+ ret = sscanf(line, "%64s %ld", buf, &val);
+ if (ret == 2 && val != 0) {
+ if (strcmp(buf, "AnonHugePages:") == 0)
+ actual_thps += val;
+ }
+ }
+
+ if (actual_thps != expect_thps)
+ tst_resm(TFAIL, "child[%d] got %ldKB thps - expect %ld"
+ "KB thps", getpid(), actual_thps, expect_thps);
+ fclose(fp);
+ }
+}
+
+void test_transparent_hugepage(int nr_children, int nr_thps, int hg_aligned)
+{
+ unsigned long hugepagesize, memfree;
+ int i, *pids, ret, status;
+ char path[BUFSIZ];
+
+ memfree = read_meminfo("MemFree:");
+ tst_resm(TINFO, "The current MemFree is %luMB", memfree / KB);
+ if (memfree < MB)
+ tst_resm(TCONF, "Not enough memory for testing");
+
+ hugepagesize = read_meminfo("Hugepagesize:");
+
+ pids = malloc(nr_children * sizeof(int));
+ if (pids == NULL)
+ tst_brkm(TBROK | TERRNO, cleanup, "malloc");
+
+ for (i = 0; i < nr_children; i++) {
+ switch (pids[i] = fork()) {
+ case -1:
+ tst_brkm(TBROK | TERRNO, cleanup, "fork");
+
+ case 0:
+ ret = alloc_transparent_hugepages(nr_thps, hg_aligned);
+ exit(ret);
+ }
+ }
+
+ tst_resm(TINFO, "Stop all children...");
+ for (i = 0; i < nr_children; i++) {
+ if (waitpid(pids[i], &status, WUNTRACED) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid");
+ if (!WIFSTOPPED(status))
+ tst_brkm(TBROK, cleanup,
+ "child[%d] was not stoppted", pids[i]);
+ }
+
+ tst_resm(TINFO, "Start to scan all transparent hugepages...");
+ khugepaged_scan_done();
+
+ tst_resm(TINFO, "Start to verify transparent hugepage size...");
+ verify_thp_size(pids, nr_children, nr_thps);
+
+ tst_resm(TINFO, "Wake up all children...");
+ for (i = 0; i < nr_children; i++) {
+ if (kill(pids[i], SIGCONT) == -1)
+ tst_brkm(TBROK | TERRNO, cleanup,
+ "signal continue child[%d]", pids[i]);
+ }
+
+ /* wait all children finish their task */
+ for (i = 0; i < nr_children; i++) {
+ if (waitpid(pids[i], &status, 0) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid %d", pids[i]);
+
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ tst_resm(TFAIL, "the child[%d] unexpectedly failed:"
+ " %d", pids[i], status);
+ }
+}
+
+void check_thp_options(int *nr_children, int *nr_thps)
+{
+ if (opt_nr_children)
+ *nr_children = SAFE_STRTOL(NULL, opt_nr_children_str,
+ 0, LONG_MAX);
+ if (opt_nr_thps)
+ *nr_thps = SAFE_STRTOL(NULL, opt_nr_thps_str, 0, LONG_MAX);
+}
+
+void thp_usage(void)
+{
+ printf(" -n Number of processes\n");
+ printf(" -N Number of transparent hugepages\n");
+}
+
/* cpuset/memcg */
static void gather_node_cpus(char *cpus, long nd)
diff --git a/testcases/kernel/mem/thp/thp04.c b/testcases/kernel/mem/thp/thp04.c
new file mode 100644
index 0000000..0c70634
--- /dev/null
+++ b/testcases/kernel/mem/thp/thp04.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2013 Linux Test Project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like. Any license provided herein, whether
+ * implied or otherwise, applies only to this software file. Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/*
+ * The case is designed to test the functionality of transparent
+ * hugepage - THP
+ *
+ * when one process allocate hugepage aligned anonymous pages,
+ * kernel thread 'khugepaged' controlled by sysfs knobs
+ * /sys/kernel/mm/transparent_hugepage/ will scan them, and make
+ * them as transparent hugepage if they are suited, you can find out
+ * how many transparent hugepages are there in one process from
+ * /proc/<pid>/smaps, among the file contents, 'AnonHugePages' entry
+ * stand for transparent hugepage.
+ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "test.h"
+#include "usctest.h"
+#include "mem.h"
+
+char *TCID = "thp04";
+int TST_TOTAL = 1;
+
+option_t thp_options[] = {
+ {"n:", &opt_nr_children, &opt_nr_children_str},
+ {"N:", &opt_nr_thps, &opt_nr_thps_str},
+ {NULL, NULL, NULL}
+};
+
+static int pre_thp_scan_sleep_millisecs;
+static int pre_thp_alloc_sleep_millisecs;
+static char pre_thp_enabled[BUFSIZ];
+
+int main(int argc, char *argv[])
+{
+ int lc;
+ char *msg;
+ int nr_children = 2, nr_thps = 64;
+
+ msg = parse_opts(argc, argv, thp_options, thp_usage);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+ check_thp_options(&nr_children, &nr_thps);
+
+ setup();
+
+ tst_resm(TINFO, "Start to test transparent hugepage...");
+ tst_resm(TINFO, "There are %d children allocating %d "
+ "transparent hugepages", nr_children, nr_thps);
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ tst_count = 0;
+
+ test_transparent_hugepage(nr_children, nr_thps, 1);
+ }
+
+ cleanup();
+ tst_exit();
+}
+
+void setup(void)
+{
+ tst_require_root(NULL);
+
+ if (access(PATH_THP, F_OK) == -1)
+ tst_brkm(TCONF, NULL, "THP is not enabled");
+
+ SAFE_FILE_SCANF(NULL, PATH_KHPD "scan_sleep_millisecs",
+ "%d", &pre_thp_scan_sleep_millisecs);
+ /* set 0 to khugepaged/scan_sleep_millisecs to run khugepaged 100% */
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "scan_sleep_millisecs", "0");
+
+ SAFE_FILE_SCANF(NULL, PATH_KHPD "alloc_sleep_millisecs",
+ "%d", &pre_thp_alloc_sleep_millisecs);
+ /*
+ * set 0 to khugepaged/alloc_sleep_millisecs to make sure khugepaged
+ * don't stop if there's a hugepage allcation failure.
+ */
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "alloc_sleep_millisecs", "0");
+
+ SAFE_FILE_SCANF(NULL, PATH_THP "enabled", "%[^\n]", pre_thp_enabled);
+ /* open khugepaged as 'always' mode */
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "always");
+
+ tst_sig(FORK, DEF_HANDLER, NULL);
+ TEST_PAUSE;
+}
+
+void cleanup(void)
+{
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "scan_sleep_millisecs",
+ "%d", pre_thp_scan_sleep_millisecs);
+
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "alloc_sleep_millisecs",
+ "%d", pre_thp_alloc_sleep_millisecs);
+
+ /*
+ * The value of transparent_hugepage/enabled is speical,
+ * we need to recover the previous value one by one for
+ * the three mode: always, madvise, never.
+ */
+ if (strcmp(pre_thp_enabled, "[always] madvise never") == 0)
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "always");
+ else if (strcmp(pre_thp_enabled, "always [madvise] never") == 0)
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "madvise");
+ else
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "never");
+
+ TEST_CLEANUP;
+}
--
1.7.11.7
------------------------------------------------------------------------------
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
_______________________________________________
Ltp-list mailing list
Ltp-list@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ltp-list
^ permalink raw reply related [flat|nested] 7+ messages in thread* [LTP] [PATCH v4 2/3] lib/mem: introduce a new function set_global_mempolicy()
2013-04-16 14:30 [LTP] [PATCH v5 0/3] mm/thp: add two new case Zhouping Liu
2013-04-16 14:30 ` [LTP] [PATCH v4 1/3] mm/thp: new case thp04.c Zhouping Liu
@ 2013-04-16 14:30 ` Zhouping Liu
2013-04-16 14:30 ` [LTP] [PATCH v4 3/3] mm/thp: add new case thp05 Zhouping Liu
2013-04-17 3:26 ` [LTP] [PATCH v5 0/3] mm/thp: add two new case Wanlong Gao
3 siblings, 0 replies; 7+ messages in thread
From: Zhouping Liu @ 2013-04-16 14:30 UTC (permalink / raw)
To: LTP List
Fork out a new function set_global_mempolicy() from the
previous testoom() func, which will be useful for other func.
Tested-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Zhouping Liu <zliu@redhat.com>
---
testcases/kernel/mem/include/mem.h | 3 ++-
testcases/kernel/mem/lib/mem.c | 13 +++++++++++--
testcases/kernel/mem/thp/thp04.c | 2 +-
3 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/testcases/kernel/mem/include/mem.h b/testcases/kernel/mem/include/mem.h
index cc8b86c..c9e0540 100644
--- a/testcases/kernel/mem/include/mem.h
+++ b/testcases/kernel/mem/include/mem.h
@@ -39,7 +39,8 @@ void testoom(int mempolicy, int lite);
int opt_nr_children, opt_nr_thps;
char *opt_nr_children_str, *opt_nr_thps_str;
-void test_transparent_hugepage(int nr_children, int nr_thps, int hg_aligned);
+void test_transparent_hugepage(int nr_children, int nr_thps,
+ int hg_aligned, int mempolicy);
void check_thp_options(int *nr_children, int *nr_thps);
void thp_usage(void);
diff --git a/testcases/kernel/mem/lib/mem.c b/testcases/kernel/mem/lib/mem.c
index fa5694a..f6aa351 100644
--- a/testcases/kernel/mem/lib/mem.c
+++ b/testcases/kernel/mem/lib/mem.c
@@ -91,7 +91,7 @@ void oom(int testcase, int lite)
}
}
-void testoom(int mempolicy, int lite)
+static void set_global_mempolicy(int mempolicy)
{
#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
&& HAVE_MPOL_CONSTANTS
@@ -133,6 +133,11 @@ void testoom(int mempolicy, int lite)
tst_brkm(TBROK|TERRNO, cleanup, "set_mempolicy");
}
#endif
+}
+
+void testoom(int mempolicy, int lite)
+{
+ set_global_mempolicy(mempolicy);
tst_resm(TINFO, "start normal OOM testing.");
oom(NORMAL, lite);
@@ -613,12 +618,16 @@ static void verify_thp_size(int *children, int nr_children, int nr_thps)
}
}
-void test_transparent_hugepage(int nr_children, int nr_thps, int hg_aligned)
+void test_transparent_hugepage(int nr_children, int nr_thps,
+ int hg_aligned, int mempolicy)
{
unsigned long hugepagesize, memfree;
int i, *pids, ret, status;
char path[BUFSIZ];
+ if (mempolicy)
+ set_global_mempolicy(mempolicy);
+
memfree = read_meminfo("MemFree:");
tst_resm(TINFO, "The current MemFree is %luMB", memfree / KB);
if (memfree < MB)
diff --git a/testcases/kernel/mem/thp/thp04.c b/testcases/kernel/mem/thp/thp04.c
index 0c70634..d84a3f5 100644
--- a/testcases/kernel/mem/thp/thp04.c
+++ b/testcases/kernel/mem/thp/thp04.c
@@ -83,7 +83,7 @@ int main(int argc, char *argv[])
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
- test_transparent_hugepage(nr_children, nr_thps, 1);
+ test_transparent_hugepage(nr_children, nr_thps, 1, 0);
}
cleanup();
--
1.7.11.7
------------------------------------------------------------------------------
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
_______________________________________________
Ltp-list mailing list
Ltp-list@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ltp-list
^ permalink raw reply related [flat|nested] 7+ messages in thread* [LTP] [PATCH v4 3/3] mm/thp: add new case thp05
2013-04-16 14:30 [LTP] [PATCH v5 0/3] mm/thp: add two new case Zhouping Liu
2013-04-16 14:30 ` [LTP] [PATCH v4 1/3] mm/thp: new case thp04.c Zhouping Liu
2013-04-16 14:30 ` [LTP] [PATCH v4 2/3] lib/mem: introduce a new function set_global_mempolicy() Zhouping Liu
@ 2013-04-16 14:30 ` Zhouping Liu
2013-04-17 3:26 ` [LTP] [PATCH v5 0/3] mm/thp: add two new case Wanlong Gao
3 siblings, 0 replies; 7+ messages in thread
From: Zhouping Liu @ 2013-04-16 14:30 UTC (permalink / raw)
To: LTP List
added new case thp05, which is used to test transparent hugepage
under mempolicy - NUMA.
Tested-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Zhouping Liu <zliu@redhat.com>
---
runtest/mm | 3 +
testcases/kernel/mem/thp/thp05.c | 153 +++++++++++++++++++++++++++++++++++++++
2 files changed, 156 insertions(+)
create mode 100644 testcases/kernel/mem/thp/thp05.c
diff --git a/runtest/mm b/runtest/mm
index 3fbb20f..7c7abf1 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -87,6 +87,9 @@ thp03 thp03
thp04_1 thp04
thp04_2 thp04 -n 10 -N 20
thp04_3 thp04 -n 1 -N 300
+thp05_1 thp05
+thp05_2 thp05 -n 10 -N 20
+thp05_3 thp05 -n 1 -N 300
vma01 vma01
vma02 vma02
diff --git a/testcases/kernel/mem/thp/thp05.c b/testcases/kernel/mem/thp/thp05.c
new file mode 100644
index 0000000..8b595ca
--- /dev/null
+++ b/testcases/kernel/mem/thp/thp05.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2013 Linux Test Project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like. Any license provided herein, whether
+ * implied or otherwise, applies only to this software file. Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/*
+ * The case is designed to test the functionality of transparent
+ * hugepage - THP under mempolicy (NUMA)
+ *
+ * when one process allocate hugepage aligned anonymous pages,
+ * kernel thread 'khugepaged' controlled by sysfs knobs
+ * /sys/kernel/mm/transparent_hugepage/ will scan them, and make
+ * them as transparent hugepage if they are suited, you can find out
+ * how many transparent hugepages are there in one process from
+ * /proc/<pid>/smaps, among the file contents, 'AnonHugePages' entry
+ * stand for transparent hugepage.
+ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "numa_helper.h"
+#include "test.h"
+#include "usctest.h"
+#include "mem.h"
+
+char *TCID = "thp05";
+int TST_TOTAL = 1;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+ && HAVE_MPOL_CONSTANTS
+
+option_t thp_options[] = {
+ {"n:", &opt_nr_children, &opt_nr_children_str},
+ {"N:", &opt_nr_thps, &opt_nr_thps_str},
+ {NULL, NULL, NULL}
+};
+
+static int pre_thp_scan_sleep_millisecs;
+static int pre_thp_alloc_sleep_millisecs;
+static char pre_thp_enabled[BUFSIZ];
+
+int main(int argc, char *argv[])
+{
+ int lc;
+ char *msg;
+ int nr_children = 2, nr_thps = 64;
+
+ msg = parse_opts(argc, argv, thp_options, thp_usage);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+ check_thp_options(&nr_children, &nr_thps);
+
+ setup();
+
+ tst_resm(TINFO, "Start to test transparent hugepage...");
+ tst_resm(TINFO, "There are %d children allocating %d "
+ "transparent hugepages", nr_children, nr_thps);
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ tst_count = 0;
+
+ tst_resm(TINFO, "THP on MPOL_BIND mempolicy...");
+ test_transparent_hugepage(nr_children, nr_thps, 1, MPOL_BIND);
+
+ tst_resm(TINFO, "THP on MPOL_INTERLEAVE mempolicy...");
+ test_transparent_hugepage(nr_children, nr_thps, 1,
+ MPOL_INTERLEAVE);
+
+ tst_resm(TINFO, "THP on MPOL_PREFERRED mempolicy...");
+ test_transparent_hugepage(nr_children, nr_thps, 1,
+ MPOL_PREFERRED);
+ }
+
+ cleanup();
+ tst_exit();
+}
+
+void setup(void)
+{
+ tst_require_root(NULL);
+
+ if (access(PATH_THP, F_OK) == -1)
+ tst_brkm(TCONF, NULL, "THP is not enabled");
+
+ if (!is_numa(NULL))
+ tst_brkm(TCONF, NULL, "The case need a NUMA system.");
+
+ SAFE_FILE_SCANF(NULL, PATH_KHPD "scan_sleep_millisecs",
+ "%d", &pre_thp_scan_sleep_millisecs);
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "scan_sleep_millisecs", "0");
+
+ SAFE_FILE_SCANF(NULL, PATH_KHPD "alloc_sleep_millisecs",
+ "%d", &pre_thp_alloc_sleep_millisecs);
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "alloc_sleep_millisecs", "0");
+
+ SAFE_FILE_SCANF(NULL, PATH_THP "enabled", "%[^\n]", pre_thp_enabled);
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "always");
+
+ tst_sig(FORK, DEF_HANDLER, NULL);
+ TEST_PAUSE;
+}
+
+void cleanup(void)
+{
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "scan_sleep_millisecs",
+ "%d", pre_thp_scan_sleep_millisecs);
+
+ SAFE_FILE_PRINTF(NULL, PATH_KHPD "alloc_sleep_millisecs",
+ "%d", pre_thp_alloc_sleep_millisecs);
+
+ if (strcmp(pre_thp_enabled, "[always] madvise never") == 0)
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "always");
+ else if (strcmp(pre_thp_enabled, "always [madvise] never") == 0)
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "madvise");
+ else
+ SAFE_FILE_PRINTF(NULL, PATH_THP "enabled", "never");
+
+ TEST_CLEANUP;
+}
+
+#else /* no NUMA */
+int main(void)
+{
+ tst_brkm(TCONF, NULL, "no NUMA development packages installed.");
+}
+#endif
--
1.7.11.7
------------------------------------------------------------------------------
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
_______________________________________________
Ltp-list mailing list
Ltp-list@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ltp-list
^ permalink raw reply related [flat|nested] 7+ messages in thread