Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Linux Test Project |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it |
| 13 | * is free of the rightful claim of any third person regarding |
| 14 | * infringement or the like. Any license provided herein, whether |
| 15 | * implied or otherwise, applies only to this software file. Patent |
| 16 | * licenses, if any, provided herein do not apply to combinations of |
| 17 | * this program with other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 22 | * 02110-1301, USA. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * The case is designed to test new sysfs boolean knob |
| 27 | * /sys/kernel/mm/ksm/merge_across_nodes, which was introduced by |
| 28 | * commit 90bd6fd31c8097ee (ksm: allow trees per NUMA node). |
| 29 | * when merge_across_nodes is set to zero only pages from the same |
| 30 | * node are merged, otherwise pages from all nodes can be merged |
| 31 | * together. |
| 32 | */ |
| 33 | |
| 34 | #include "config.h" |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/stat.h> |
| 37 | #include <sys/mman.h> |
| 38 | #include <errno.h> |
| 39 | #include <fcntl.h> |
| 40 | #if HAVE_NUMAIF_H |
| 41 | #include <numaif.h> |
| 42 | #endif |
| 43 | #include <signal.h> |
| 44 | #include <stdio.h> |
| 45 | #include <unistd.h> |
| 46 | #include "numa_helper.h" |
| 47 | #include "test.h" |
| 48 | #include "safe_macros.h" |
Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 49 | #include "mem.h" |
| 50 | |
| 51 | char *TCID = "ksm06"; |
| 52 | int TST_TOTAL = 1; |
| 53 | |
| 54 | #if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \ |
| 55 | && HAVE_MPOL_CONSTANTS |
| 56 | |
| 57 | static int run; |
| 58 | static int sleep_millisecs; |
| 59 | static int merge_across_nodes; |
| 60 | static int n_flag; |
| 61 | static unsigned long nr_pages; |
| 62 | |
| 63 | static char *n_opt; |
| 64 | option_t options[] = { |
| 65 | { "n:", &n_flag, &n_opt }, |
| 66 | { NULL, NULL, NULL } |
| 67 | }; |
| 68 | static void usage(void); |
| 69 | |
| 70 | int main(int argc, char *argv[]) |
| 71 | { |
| 72 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 73 | const char *msg; |
Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 74 | |
| 75 | msg = parse_opts(argc, argv, options, &usage); |
| 76 | if (msg != NULL) |
| 77 | tst_brkm(TBROK, NULL, "OPTION PASING ERROR - %s", msg); |
| 78 | if (n_flag) |
| 79 | nr_pages = SAFE_STRTOUL(NULL, n_opt, 0, ULONG_MAX); |
| 80 | else |
| 81 | nr_pages = 100; |
| 82 | |
| 83 | setup(); |
| 84 | |
| 85 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 86 | tst_count = 0; |
| 87 | |
| 88 | test_ksm_merge_across_nodes(nr_pages); |
| 89 | } |
| 90 | |
| 91 | cleanup(); |
| 92 | tst_exit(); |
| 93 | } |
| 94 | |
| 95 | void setup(void) |
| 96 | { |
| 97 | if (access(PATH_KSM "merge_across_nodes", F_OK) == -1) |
| 98 | tst_brkm(TCONF, NULL, "no merge_across_nodes sysfs knob"); |
| 99 | |
| 100 | if (!is_numa(NULL)) |
| 101 | tst_brkm(TCONF, NULL, "The case need a NUMA system."); |
| 102 | |
| 103 | /* save the current value */ |
| 104 | SAFE_FILE_SCANF(NULL, PATH_KSM "run", "%d", &run); |
| 105 | SAFE_FILE_SCANF(NULL, PATH_KSM "merge_across_nodes", |
| 106 | "%d", &merge_across_nodes); |
| 107 | SAFE_FILE_SCANF(NULL, PATH_KSM "sleep_millisecs", |
| 108 | "%d", &sleep_millisecs); |
| 109 | |
| 110 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 111 | TEST_PAUSE; |
| 112 | } |
| 113 | |
| 114 | void cleanup(void) |
| 115 | { |
Li Wang | 8bfd7c1 | 2014-12-03 08:11:36 -0500 | [diff] [blame] | 116 | FILE_PRINTF(PATH_KSM "merge_across_nodes", |
Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 117 | "%d", merge_across_nodes); |
Li Wang | 8bfd7c1 | 2014-12-03 08:11:36 -0500 | [diff] [blame] | 118 | FILE_PRINTF(PATH_KSM "sleep_millisecs", |
Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 119 | "%d", sleep_millisecs); |
Li Wang | 8bfd7c1 | 2014-12-03 08:11:36 -0500 | [diff] [blame] | 120 | FILE_PRINTF(PATH_KSM "run", "%d", run); |
Zhouping Liu | 65ca1bd | 2013-05-13 16:43:28 +0800 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static void usage(void) |
| 124 | { |
| 125 | printf(" -n x Allocate x pages memory per node\n"); |
| 126 | } |
| 127 | |
| 128 | #else /* no NUMA */ |
| 129 | int main(void) |
| 130 | { |
| 131 | tst_brkm(TCONF, NULL, "no NUMA development packages installed."); |
| 132 | } |
| 133 | #endif |