1 /*
2 * Out Of Memory (OOM) for Memory Resource Controller
3 *
4 * The program is designed to cope with unpredictable like amount and
5 * system physical memory, swap size and other VMM technology like KSM,
6 * memcg, memory hotplug and so on which may affect the OOM
7 * behaviours. It simply increase the memory consumption 3G each time
8 * until all the available memory is consumed and OOM is triggered.
9 *
10 * Copyright (C) 2010 Red Hat, Inc.
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it would be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * Further, this software is distributed without any warranty that it
20 * is free of the rightful claim of any third person regarding
21 * infringement or the like. Any license provided herein, whether
22 * implied or otherwise, applies only to this software file. Patent
23 * licenses, if any, provided herein do not apply to combinations of
24 * this program with other software, or any other product whatsoever.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write the Free Software
28 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
29 * 02110-1301, USA.
30 */
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <stdio.h>
36 #include "numa_helper.h"
37 #include "test.h"
38 #include "mem.h"
39
40 char *TCID = "oom03";
41 int TST_TOTAL = 1;
42
43 #if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
44 && HAVE_MPOL_CONSTANTS
45
main(int argc,char * argv[])46 int main(int argc, char *argv[])
47 {
48 int lc;
49
50 tst_parse_opts(argc, argv, NULL, NULL);
51
52 #if __WORDSIZE == 32
53 tst_brkm(TCONF, NULL, "test is not designed for 32-bit system.");
54 #endif
55
56 setup();
57
58 for (lc = 0; TEST_LOOPING(lc); lc++) {
59 tst_count = 0;
60
61 SAFE_FILE_PRINTF(cleanup, MEMCG_PATH_NEW "/tasks",
62 "%d", getpid());
63 SAFE_FILE_PRINTF(cleanup, MEMCG_LIMIT, "%ld", TESTMEM);
64
65 testoom(0, 0, ENOMEM, 1);
66
67 if (access(MEMCG_SW_LIMIT, F_OK) == -1) {
68 if (errno == ENOENT)
69 tst_resm(TCONF,
70 "memcg swap accounting is disabled");
71 else
72 tst_brkm(TBROK | TERRNO, cleanup, "access");
73 } else {
74 SAFE_FILE_PRINTF(cleanup, MEMCG_SW_LIMIT,
75 "%ld", TESTMEM);
76 testoom(0, 1, ENOMEM, 1);
77 }
78
79 /* OOM for MEMCG with mempolicy */
80 if (is_numa(cleanup, NH_MEMS, 2)) {
81 tst_resm(TINFO, "OOM on MEMCG & mempolicy...");
82 testoom(MPOL_BIND, 0, ENOMEM, 1);
83 testoom(MPOL_INTERLEAVE, 0, ENOMEM, 1);
84 testoom(MPOL_PREFERRED, 0, ENOMEM, 1);
85 }
86 }
87 cleanup();
88 tst_exit();
89 }
90
setup(void)91 void setup(void)
92 {
93 tst_require_root();
94 tst_sig(FORK, DEF_HANDLER, cleanup);
95 TEST_PAUSE;
96
97 overcommit = get_sys_tune("overcommit_memory");
98 set_sys_tune("overcommit_memory", 1, 1);
99 mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
100 }
101
cleanup(void)102 void cleanup(void)
103 {
104 set_sys_tune("overcommit_memory", overcommit, 0);
105 umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
106 }
107
108 #else
main(void)109 int main(void)
110 {
111 tst_brkm(TCONF, NULL, "no NUMA development packages installed.");
112 }
113 #endif
114