1#!/bin/sh 2 3# 4# Copyright (c) 2017 Dell EMC Isilon 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# vm.stats.vm.v_laundry_count test. WiP. No problems seen. 30 31. ../default.cfg 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/laundry.c 38mycc -o laundry -Wall -Wextra -O0 -g laundry.c || exit 1 39rm -f laundry.c 40cd $odir 41 42size=`sysctl -n hw.usermem` 43swaptotal=`sysctl -n vm.swap_total` 44[ $swaptotal -eq 0 ] && exit 0 45[ $size -gt $swaptotal ] && size=$swaptotal 46size=$((size / 10 * 8)) 47set -e 48mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 49[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 50mdconfig -a -t swap -s 1g -u $mdstart 51newfs $newfs_flags md$mdstart > /dev/null 52mount /dev/md$mdstart $mntpoint 53set +e 54 55cd $mntpoint 56$dir/laundry $size 57s=$? 58[ -f laundry.core -a $s -eq 0 ] && 59 { ls -l laundry.core; s=1; } 60cd $odir 61 62for i in `jot 6`; do 63 mount | grep -q "on $mntpoint " || break 64 umount $mntpoint && break || sleep 10 65done 66[ $i -eq 6 ] && exit 1 67mdconfig -d -u $mdstart 68rm -rf $dir/laundry 69exit $s 70 71EOF 72#include <sys/param.h> 73#include <sys/mman.h> 74#include <sys/stat.h> 75#include <sys/wait.h> 76 77#include <machine/atomic.h> 78 79#include <err.h> 80#include <errno.h> 81#include <fcntl.h> 82#include <stdio.h> 83#include <stdlib.h> 84#include <time.h> 85#include <unistd.h> 86 87static volatile u_int *share; 88size_t size; 89 90#define PARALLEL 4 91#define RUNTIME (5 * 60) 92#define SYNC 0 93 94static void 95test(void) 96{ 97 size_t i, sz; 98 time_t start; 99 int n; 100 char *cp; 101 102 atomic_add_int(&share[SYNC], 1); 103 while (share[SYNC] != PARALLEL) 104 ; 105 106 sz = size; 107 if ((cp = mmap(0, sz, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0)) == 108 (caddr_t) - 1) 109 err(1, "mmap size %zd", sz); 110 111 n = 0; 112 start = time(NULL); 113 while ((time(NULL) - start) < RUNTIME) { 114 n++; 115 n = n & 0xff; 116 for (i = 0; i < sz; i += PAGE_SIZE) 117 cp[i] = n; 118 usleep(100); 119 } 120 munmap(cp, sz); 121 122 _exit(0); 123} 124 125int 126main(int argc __unused, char *argv[]) 127{ 128 pid_t pids[PARALLEL]; 129 size_t len; 130 time_t start; 131 int e, status; 132 u_int i; 133 134 sscanf(argv[1], "%zd", &size); 135 size /= PARALLEL; 136 e = 0; 137 len = PAGE_SIZE; 138 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 139 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 140 err(1, "mmap"); 141 142 start = time(NULL); 143 while ((time(NULL) - start) < RUNTIME && e == 0) { 144 share[SYNC] = 0; 145 for (i = 0; i < PARALLEL; i++) { 146 if ((pids[i] = fork()) == 0) 147 test(); 148 if (pids[i] == -1) 149 err(1, "fork()"); 150 } 151 for (i = 0; i < PARALLEL; i++) { 152 if (waitpid(pids[i], &status, 0) == -1) 153 err(1, "waitpid(%d)", pids[i]); 154 if (status != 0) { 155 if (WIFEXITED(status)) { 156 printf("exited, status=%d\n", 157 WEXITSTATUS(status)); 158 } else if (WIFSIGNALED(status)) { 159 printf("killed by signal %d\n", 160 WTERMSIG(status)); 161 } else if (WIFSTOPPED(status)) { 162 printf("stopped by signal %d\n", 163 WSTOPSIG(status)); 164 } else if (WIFCONTINUED(status)) { 165 printf("continued\n"); 166 } 167 fprintf(stderr, "pid %d exit code %d\n", 168 pids[i], status); 169 } 170 e += status == 0 ? 0 : 1; 171 } 172 } 173 174 return (e); 175} 176 177