[LTP] [PATCH v4 6/7] mm/oom05: new testcase

Zhouping Liu
2013-03-19T03:43:16Z

added a new case to test OOM under the combination
of MEMCG and CPUSET.

Signed-off-by: Zhouping Liu <zliu@redhat.com>
---
runtest/mm | 1 +
testcases/kernel/mem/oom/oom05.c | 147 +++++++++++++++++++++++++++++++++++++++
2 files changed, 148 insertions(+)
create mode 100644 testcases/kernel/mem/oom/oom05.c

diff --git a/runtest/mm b/runtest/mm
index a8bd605..56b83f8 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -77,6 +77,7 @@ oom01 oom01
oom02 oom02
oom03 oom03
oom04 oom04
+oom05 oom05

swapping01 swapping01 -i 5

diff --git a/testcases/kernel/mem/oom/oom05.c b/testcases/kernel/mem/oom/oom05.c
new file mode 100644
index 0000000..cd45f08
--- /dev/null
+++ b/testcases/kernel/mem/oom/oom05.c
@@ -0,0 +1,147 @@
+/*
+ * Out Of Memory (OOM) for MEMCG and CPUSET
+ *
+ * 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) 2013 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 "config.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include "numa_helper.h"
+#include "test.h"
+#include "usctest.h"
+#include "mem.h"
+
+char *TCID = "oom05";
+int TST_TOTAL = 1;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+ && HAVE_MPOL_CONSTANTS
+
+int main(int argc, char *argv[])
+{
+ char *msg;
+ int lc;
+ int swap_acc_on = 1;
+ char mem[BUFSIZ];
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
+
+#if __WORDSIZE == 32
+ tst_brkm(TCONF, NULL, "test is not designed for 32-bit system.");
+#endif
+
+ setup();
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ tst_count = 0;
+
+ tst_resm(TINFO, "OOM on CPUSET & MEMCG...");
+ testoom(0, 0);
+
+ /*
+ * Under NUMA system, the migration of cpuset's memory
+ * is in charge of cpuset.memory_migrate, we can write
+ * 1 to cpuset.memory_migrate to enable the migration.
+ */
+ if (is_numa(cleanup)) {
+ write_cpuset_files(CPATH_NEW, "memory_migrate", "1");
+ tst_resm(TINFO, "OOM on CPUSET & MEMCG with "
+ "cpuset.memory_migrate=1");
+ testoom(0, 0);
+ }
+
+ if (access(MEMCG_SW_LIMIT, F_OK) == -1) {
+ if (errno == ENOENT) {
+ tst_resm(TCONF,
+ "memcg swap accounting is disabled");
+ swap_acc_on = 0;
+ } else
+ tst_brkm(TBROK|TERRNO, cleanup, "access");
+ }
+
+ if (swap_acc_on) {
+ tst_resm(TINFO, "OOM on CPUSET & MEMCG with "
+ "special memswap limitation:");
+ snprintf(mem, BUFSIZ, "%ld", TESTMEM);
+ write_file(MEMCG_SW_LIMIT, mem);
+ testoom(0, 0);
+
+ tst_resm(TINFO, "OOM on CPUSET & MEMCG with "
+ "disabled memswap limitation:");
+ write_file(MEMCG_SW_LIMIT, "-1");
+ testoom(0, 0);
+ }
+ }
+
+ cleanup();
+ tst_exit();
+}
+
+void setup(void)
+{
+ tst_require_root(NULL);
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+
+ mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
+ mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW);
+ write_memcg();
+
+ set_sys_tune("overcommit_memory", 1, 1);
+
+ if (is_numa(cleanup))
+ /* For NUMA system, using the first node for cpuset.mems */
+ write_cpusets(get_a_numa_node(cleanup));
+ else
+ /* For nonNUMA system, using node0 for cpuset.mems */
+ write_cpusets(0);
+
+ overcommit = get_sys_tune("overcommit_memory");
+}
+
+void cleanup(void)
+{
+ set_sys_tune("overcommit_memory", overcommit, 0);
+ umount_mem(CPATH, CPATH_NEW);
+ umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
+
+ TEST_CLEANUP;
+}
+
+#else /* no NUMA */
+int main(void)
+{
+ tst_brkm(TCONF, NULL, "no NUMA development packages installed.");
+}
+#endif