1 /* 2 * Out Of Memory (OOM) for MEMCG and CPUSET 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) 2013 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 32 #include "config.h" 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <errno.h> 36 #include <fcntl.h> 37 #include <stdio.h> 38 #include "numa_helper.h" 39 #include "test.h" 40 #include "mem.h" 41 42 char *TCID = "oom05"; 43 int TST_TOTAL = 1; 44 45 #if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \ 46 && HAVE_MPOL_CONSTANTS 47 48 int main(int argc, char *argv[]) 49 { 50 int lc; 51 int swap_acc_on = 1; 52 53 tst_parse_opts(argc, argv, NULL, NULL); 54 55 #if __WORDSIZE == 32 56 tst_brkm(TCONF, NULL, "test is not designed for 32-bit system."); 57 #endif 58 59 setup(); 60 61 for (lc = 0; TEST_LOOPING(lc); lc++) { 62 tst_count = 0; 63 64 tst_resm(TINFO, "OOM on CPUSET & MEMCG..."); 65 testoom(0, 0, ENOMEM, 1); 66 67 /* 68 * Under NUMA system, the migration of cpuset's memory 69 * is in charge of cpuset.memory_migrate, we can write 70 * 1 to cpuset.memory_migrate to enable the migration. 71 */ 72 if (is_numa(cleanup, NH_MEMS, 2)) { 73 write_cpuset_files(CPATH_NEW, "memory_migrate", "1"); 74 tst_resm(TINFO, "OOM on CPUSET & MEMCG with " 75 "cpuset.memory_migrate=1"); 76 testoom(0, 0, ENOMEM, 1); 77 } 78 79 if (access(MEMCG_SW_LIMIT, F_OK) == -1) { 80 if (errno == ENOENT) { 81 tst_resm(TCONF, 82 "memcg swap accounting is disabled"); 83 swap_acc_on = 0; 84 } else 85 tst_brkm(TBROK|TERRNO, cleanup, "access"); 86 } 87 88 if (swap_acc_on) { 89 tst_resm(TINFO, "OOM on CPUSET & MEMCG with " 90 "special memswap limitation:"); 91 SAFE_FILE_PRINTF(cleanup, MEMCG_SW_LIMIT, "%ld", TESTMEM); 92 testoom(0, 0, ENOMEM, 1); 93 94 tst_resm(TINFO, "OOM on CPUSET & MEMCG with " 95 "disabled memswap limitation:"); 96 SAFE_FILE_PRINTF(cleanup, MEMCG_SW_LIMIT, "-1"); 97 testoom(0, 0, ENOMEM, 1); 98 } 99 } 100 101 cleanup(); 102 tst_exit(); 103 } 104 105 void setup(void) 106 { 107 int ret, memnode; 108 109 tst_require_root(); 110 tst_sig(FORK, DEF_HANDLER, cleanup); 111 TEST_PAUSE; 112 113 if (!is_numa(NULL, NH_MEMS, 1)) 114 tst_brkm(TCONF, NULL, "requires NUMA with at least 1 node"); 115 116 overcommit = get_sys_tune("overcommit_memory"); 117 set_sys_tune("overcommit_memory", 1, 1); 118 119 mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW); 120 mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW); 121 write_memcg(); 122 123 /* 124 * Some nodes do not contain memory, so use 125 * get_allowed_nodes(NH_MEMS) to get a memory 126 * node. This operation also applies to Non-NUMA 127 * systems. 128 */ 129 ret = get_allowed_nodes(NH_MEMS, 1, &memnode); 130 if (ret < 0) 131 tst_brkm(TBROK, cleanup, "Failed to get a memory node " 132 "using get_allowed_nodes()"); 133 write_cpusets(memnode); 134 } 135 136 void cleanup(void) 137 { 138 set_sys_tune("overcommit_memory", overcommit, 0); 139 umount_mem(CPATH, CPATH_NEW); 140 umount_mem(MEMCG_PATH, MEMCG_PATH_NEW); 141 } 142 143 #else /* no NUMA */ 144 int main(void) 145 { 146 tst_brkm(TCONF, NULL, "no NUMA development packages installed."); 147 } 148 #endif 149
