1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2019 Dell EMC Isilon 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# No problems seen. 31 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34. ../default.cfg 35 36dir=/tmp 37odir=`pwd` 38cd $dir 39sed '1,/^EOF/d' < $odir/$0 > $dir/shm2.c 40mycc -o shm2 -Wall -Wextra -O0 -g shm2.c || exit 1 41rm -f shm2.c 42 43(cd $odir/../testcases/swap; ./swap -t 2m -i 20 -h -l 100) & 44/tmp/shm2 45while pkill swap; do sleep 1; done 46wait 47 48rm -rf /tmp/shm2 49exit $s 50 51EOF 52#include <sys/types.h> 53#include <sys/resource.h> 54#include <sys/shm.h> 55#include <sys/sysctl.h> 56#include <sys/time.h> 57#include <sys/wait.h> 58 59#include <vm/vm_param.h> 60 61#include <err.h> 62#include <errno.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <unistd.h> 66 67#define INCARNATIONS 32 68 69static unsigned long size, original; 70static int runtime, utime; 71 72static void 73setup(void) 74{ 75 struct rlimit rlp; 76 77 size = size / INCARNATIONS; 78 original = size; 79 if (size == 0) 80 errx(1, "Argument too small"); 81 82 if (getrlimit(RLIMIT_DATA, &rlp) < 0) 83 err(1,"getrlimit"); 84 rlp.rlim_cur -= 1024 * 1024; 85 86 if (size > (unsigned long)rlp.rlim_cur) 87 size = rlp.rlim_cur; 88 89#if 0 90 printf("setup: pid %d. Total %luMb\n", 91 getpid(), size / 1024 / 1024 * INCARNATIONS); 92#endif 93 94 if (size == 0) 95 errx(1, "Argument too small"); 96 97 return; 98} 99 100static int 101test(void) 102{ 103 key_t shmkey; 104 volatile char *c; 105 int page, shmid; 106 unsigned long i, j; 107 time_t start; 108 109 shmkey = ftok("/tmp", getpid()); 110 shmid = -1; 111 while (shmid == -1) { 112 if ((shmid = shmget(shmkey, size, IPC_CREAT | IPC_EXCL | 0640)) == -1) { 113 if (errno != ENOSPC && errno != EEXIST) 114 err(1, "shmget (%s:%d)", __FILE__, __LINE__); 115 } else 116 break; 117 size -= 1024; 118 } 119 if ((c = shmat(shmid, NULL, 0)) == (void *) -1) 120 err(1, "shmat"); 121 if (size != original) 122 printf("shm size changed from %ld kb to %ld kb\n", 123 original / 1024, size / 1024); 124 page = getpagesize(); 125 start = time(NULL); 126 while ((time(NULL) - start) < runtime) { 127 i = j = 0; 128 while (i < size) { 129 c[i] = 1; 130 i += page; 131 if ((time(NULL) - start) >= runtime) 132 break; 133// usleep(utime); 134 } 135 } 136 if (shmdt((void *)c) == -1) { 137 if (errno != EINVAL) 138 warn("shmdt(%p)", c); 139 } 140 if (shmctl(shmid, IPC_RMID, NULL) == -1) 141 warn("shmctl IPC_RMID"); 142 143 _exit(0); 144} 145 146int 147main(void) 148{ 149 pid_t pids[INCARNATIONS]; 150 int i; 151 152 runtime = 120; /* 2 minutes */ 153 utime = 1000; /* 0.001 sec */ 154 size = 512 * 1024 * 1024; 155 setup(); 156 157 for (i = 0; i < INCARNATIONS; i++) 158 if ((pids[i] = fork()) == 0) 159 test(); 160 161 for (i = 0; i < INCARNATIONS; i++) 162 if (waitpid(pids[i], NULL, 0) != pids[i]) 163 err(1, "waitpid(%d)", pids[i]); 164 165 return (0); 166} 167