The patch is also attached.
From a3f8cf44e5d15e5271fe226f20c33b137a6ecd3b Mon Sep 17 00:00:00 2001
From: CAI Qian <[email protected]>
Date: Mon, 27 Dec 2010 12:28:28 +0800
Subject: [PATCH v3 1/5] oom01: test OOM
The previous version of this can be dropped.
Signed-off-by: CAI Qian <[email protected]>
---
v3: use common functions.
v2: code cleanup and skip 32-bit since there is no guarantee of running out of
virtual memory address space there.
testcases/kernel/mem/oom/Makefile | 42 +++++++
testcases/kernel/mem/oom/lib/Makefile | 25 ++++
testcases/kernel/mem/oom/lib/oom.c | 205 +++++++++++++++++++++++++++++++++
testcases/kernel/mem/oom/lib/oom.h | 30 +++++
testcases/kernel/mem/oom/oom01.c | 126 ++++++++++++++++++++
5 files changed, 428 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/oom/Makefile
create mode 100644 testcases/kernel/mem/oom/lib/Makefile
create mode 100644 testcases/kernel/mem/oom/lib/oom.c
create mode 100644 testcases/kernel/mem/oom/lib/oom.h
create mode 100644 testcases/kernel/mem/oom/oom01.c
diff --git a/testcases/kernel/mem/oom/Makefile b/testcases/kernel/mem/oom/Makefile
new file mode 100644
index 0000000..cfce410
--- /dev/null
+++ b/testcases/kernel/mem/oom/Makefile
@@ -0,0 +1,42 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+# the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+LDLIBS += $(NUMA_LIBS) -loom
+LIBDIR := lib
+LIB := $(LIBDIR)/liboom.a
+FILTER_OUT_DIRS := $(LIBDIR)
+
+$(LIBDIR):
+ mkdir -p "$@"
+
+$(LIB): $(LIBDIR)
+ $(MAKE) -C $^ -f "$(abs_srcdir)/$^/Makefile" all
+
+MAKE_DEPS := $(LIB)
+
+trunk-clean:: | lib-clean
+
+lib-clean:: $(LIBDIR)
+ $(MAKE) -C $^ -f "$(abs_srcdir)/$^/Makefile" clean
+
+include $(top_srcdir)/include/mk/generic_trunk_target.mk
+include $(top_srcdir)/include/mk/testcases.mk
diff --git a/testcases/kernel/mem/oom/lib/Makefile b/testcases/kernel/mem/oom/lib/Makefile
new file mode 100644
index 0000000..6e2f83e
--- /dev/null
+++ b/testcases/kernel/mem/oom/lib/Makefile
@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+# the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+
+top_srcdir ?= ../../../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+LIB := liboom.a
+
+include $(top_srcdir)/include/mk/lib.mk
\ No newline at end of file
diff --git a/testcases/kernel/mem/oom/lib/oom.c b/testcases/kernel/mem/oom/lib/oom.c
new file mode 100644
index 0000000..0c44959
--- /dev/null
+++ b/testcases/kernel/mem/oom/lib/oom.c
@@ -0,0 +1,205 @@
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <numaif.h>
+#include <stdarg.h>
+#include "test.h"
+#include "usctest.h"
+#include "oom.h"
+
+void oom(int testcase, int mempolicy, int lite)
+{
+ pid_t pid;
+ int status;
+ unsigned long nmask = 2;
+
+ switch(pid = fork()) {
+ case -1:
+ tst_brkm(TBROK|TERRNO, cleanup, "fork");
+ case 0:
+ if (mempolicy)
+ if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup,
+ "set_mempolicy");
+ test_alloc(testcase, lite);
+ exit(0);
+ default:
+ break;
+ }
+ tst_resm(TINFO, "expected victim is %d.", pid);
+ if (waitpid(-1, &status, 0) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid");
+
+ if (testcase == OVERCOMMIT) {
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ tst_resm(TFAIL, "the victim unexpectedly failed: %d",
+ status);
+ } else {
+ if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGKILL)
+ tst_resm(TFAIL, "the victim unexpectedly failed: %d",
+ status);
+ }
+}
+
+void testoom(int mempolicy, int lite)
+{
+ int fd;
+ char buf[BUFSIZ] = "";
+ char cpus[BUFSIZ] = "";
+
+ if (!mempolicy) {
+ gather_cpus(cpus);
+ tst_resm(TINFO, "CPU list for 2nd node is %s.", cpus);
+
+ fd = open(CPATH_NEW "/cpuset.mems", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s", buf);
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write %s", buf);
+ close(fd);
+
+ fd = open(CPATH_NEW "/cpuset.cpus", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s", buf);
+ if (write(fd, cpus, strlen(cpus)) != strlen(cpus))
+ tst_brkm(TBROK|TERRNO, cleanup, "write %s", buf);
+ close(fd);
+
+ fd = open(CPATH_NEW "/tasks", O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open %s", buf);
+ snprintf(buf, BUFSIZ, "%d", getpid());
+ if (write(fd, buf, strlen(buf)) != strlen(buf))
+ tst_brkm(TBROK|TERRNO, cleanup, "write %s", buf);
+ close(fd);
+ }
+ tst_resm(TINFO, "start normal OOM testing.");
+ oom(NORMAL, mempolicy, lite);
+
+ tst_resm(TINFO, "start OOM testing for mlocked pages.");
+ oom(MLOCK, mempolicy, lite);
+
+ tst_resm(TINFO, "start OOM testing for KSM pages.");
+ oom(KSM, mempolicy, lite);
+}
+
+long count_numa(void)
+{
+ int nnodes = 0;
+
+ while(path_exist(PATH_SYS_SYSTEM "/node/node%d", nnodes))
+ nnodes++;
+
+ return nnodes;
+}
+
+int path_exist(const char *path, ...)
+{
+ va_list ap;
+ char pathbuf[PATH_MAX];
+
+ va_start(ap, path);
+ vsnprintf(pathbuf, sizeof(pathbuf), path, ap);
+ va_end(ap);
+
+ return access(pathbuf, F_OK) == 0;
+}
+
+void gather_cpus(char *cpus)
+{
+ int ncpus = 0;
+ int i;
+ char buf[BUFSIZ];
+
+ while(path_exist(PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
+ ncpus++;
+
+ for (i = 0; i < ncpus; i++)
+ if (path_exist(PATH_SYS_SYSTEM "/node/node1/cpu%d", i)) {
+ sprintf(buf, "%d,", i);
+ strcat(cpus, buf);
+ }
+ /* Remove the trailing comma. */
+ cpus[strlen(cpus) - 1] = '\0';
+}
+
+void alloc_mem(long int length, int testcase)
+{
+ void *s;
+
+ tst_resm(TINFO, "allocating %ld bytes.", length);
+ s = mmap(NULL, length, PROT_READ|PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
+ if (s == MAP_FAILED) {
+ if (testcase == OVERCOMMIT && errno == ENOMEM)
+ return;
+ else
+ tst_brkm(TBROK|TERRNO, cleanup, "mmap");
+ }
+ if (testcase == MLOCK && mlock(s, length) == -1)
+ tst_brkm(TINFO|TERRNO, cleanup, "mlock");
+ if (testcase == KSM
+ && madvise(s, length, MADV_MERGEABLE) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "madvise");
+ memset(s, '\a', length);
+}
+
+void test_alloc(int testcase, int lite)
+{
+ if (lite)
+ alloc_mem(TESTMEM + MB, testcase);
+ else
+ while(1)
+ alloc_mem(LENGTH, testcase);
+}
+
+void umount_mem(char *path, char *path_new)
+{
+ FILE *fp;
+ int fd;
+ char s_new[BUFSIZ], s[BUFSIZ], value[BUFSIZ];
+
+ /* Move all processes in task to its parent node. */
+ sprintf(s, "%s/tasks", path);
+ fd = open(s, O_WRONLY);
+ if (fd == -1)
+ tst_resm(TWARN|TERRNO, "open %s", s);
+
+ snprintf(s_new, BUFSIZ, "%s/tasks", path_new);
+ fp = fopen(s_new, "r");
+ if (fp == NULL)
+ tst_resm(TWARN|TERRNO, "fopen %s", s_new);
+ if ((fd != -1) && (fp != NULL)) {
+ while (fgets(value, BUFSIZ, fp) != NULL)
+ if (write(fd, value, strlen(value) - 1)
+ != strlen(value) - 1)
+ tst_resm(TWARN|TERRNO, "write %s", s);
+ }
+ if (fd != -1)
+ close(fd);
+ if (fp != NULL)
+ fclose(fp);
+ if (rmdir(path_new) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir %s", path_new);
+ if (umount(path) == -1)
+ tst_resm(TWARN|TERRNO, "umount %s", path);
+ if (rmdir(path) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir %s", path);
+}
+
+void mount_mem(char *name, char *fs, char *options, char *path, char *path_new)
+{
+ if (mkdir(path, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir %s", path);
+ if (mount(name, path, fs, 0, options) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mount %s", path);
+ if (mkdir(path_new, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir %s", path_new);
+}
diff --git a/testcases/kernel/mem/oom/lib/oom.h b/testcases/kernel/mem/oom/lib/oom.h
new file mode 100644
index 0000000..d40bc89
--- /dev/null
+++ b/testcases/kernel/mem/oom/lib/oom.h
@@ -0,0 +1,30 @@
+#include "test.h"
+#include "usctest.h"
+
+#define LENGTH (3UL<<30)
+#define SYSFS_OVER "/proc/sys/vm/overcommit_memory"
+#define OVERCOMMIT 1
+#define NORMAL 2
+#define MLOCK 3
+#define KSM 4
+#define CPATH "/dev/cpuset"
+#define CPATH_NEW CPATH "/1"
+#define MAXNODES 512
+#define MEMCG_PATH "/dev/cgroup"
+#define MEMCG_PATH_NEW MEMCG_PATH "/1"
+#define TESTMEM (1UL<<30)
+#define MB (1UL<<20)
+#define PATH_SYS_SYSTEM "/sys/devices/system"
+
+char overcommit[BUFSIZ];
+
+void oom(int testcase, int mempolicy, int lite);
+void testoom(int mempolicy, int lite);
+long count_numa(void);
+int path_exist(const char *path, ...);
+void alloc_mem(long int length, int testcase);
+void test_alloc(int testcase, int lite);
+void gather_cpus(char *cpus);
+void umount_mem(char *path, char *path_new);
+void mount_mem(char *name, char *fs, char *options, char *path, char *path_new);
+void cleanup(void) LTP_ATTRIBUTE_NORETURN;
diff --git a/testcases/kernel/mem/oom/oom01.c b/testcases/kernel/mem/oom/oom01.c
new file mode 100644
index 0000000..0076ada
--- /dev/null
+++ b/testcases/kernel/mem/oom/oom01.c
@@ -0,0 +1,126 @@
+/*
+ * Out Of Memory (OOM)
+ *
+ * The program is designed to cope with unpredictable like amount and
+ * system physical memory, swap size and other VMM technology like KSM,
+ * memcg, memory hotplug and so on which may affect the OOM
+ * behaviours. It simply increase the memory consumption 3G each time
+ * until all the available memory is consumed and OOM is triggered.
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ * 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.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <asm/types.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "test.h"
+#include "usctest.h"
+#include "lib/oom.h"
+
+char *TCID = "oom01";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+static void setup(void);
+
+int main(int argc, char *argv[])
+{
+ char *msg;
+ int lc, fd;
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
+
+#ifdef __i386__
+ tst_brkm(TCONF, tst_exit,
+ "this test is not designed for 32-bit system.");
+#endif /* __i386__ */
+
+ setup();
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ Tst_count = 0;
+ tst_resm(TINFO, "start testing overcommit_memory=2.");
+ fd = open(SYSFS_OVER, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, "2", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ oom(OVERCOMMIT, 0, 0);
+
+ tst_resm(TINFO, "start testing overcommit_memory=0.");
+ if (lseek(fd, SEEK_SET, 0) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "lseek");
+ if (write(fd, "0", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ oom(OVERCOMMIT, 0, 0);
+
+ tst_resm(TINFO, "start normal OOM testing.");
+ if (lseek(fd, SEEK_SET, 0) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "lseek");
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ oom(NORMAL, 0, 0);
+
+ tst_resm(TINFO, "start OOM testing for mlocked pages.");
+ oom(MLOCK, 0, 0);
+
+ tst_resm(TINFO, "start OOM testing for KSM pages.");
+ oom(KSM, 0, 0);
+ }
+ cleanup();
+}
+
+void setup(void)
+{
+ int fd;
+
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+
+ fd = open(SYSFS_OVER, O_RDONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (read(fd, &overcommit, 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "read");
+ close(fd);
+}
+
+void cleanup(void)
+{
+ int fd;
+
+ fd = open(SYSFS_OVER, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, &overcommit, 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ TEST_CLEANUP;
+ tst_exit();
+}
--
1.7.3.2
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