1#!/bin/sh 2 3# 4# Copyright (c) 2018 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# Free page shortage test scenario 30# No problems seen 31 32. ../default.cfg 33[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1 34 35dir=/tmp 36odir=`pwd` 37cd $dir 38sed '1,/^EOF/d' < $odir/$0 > $dir/freepages.c 39mycc -o freepages -Wall -Wextra -O0 -g freepages.c || exit 1 40rm -f freepages.c 41cd $odir 42 43$dir/freepages `sysctl -n hw.usermem` 44s=$? 45[ -f freepages.core -a $s -eq 0 ] && 46 { ls -l freepages.core; mv freepages.core /tmp; s=1; } 47 48rm -rf $dir/freepages 49exit $s 50EOF 51#include <sys/param.h> 52#include <sys/mman.h> 53#include <sys/stat.h> 54#include <sys/wait.h> 55 56#include <machine/atomic.h> 57 58#include <err.h> 59#include <errno.h> 60#include <fcntl.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <time.h> 64#include <unistd.h> 65 66static volatile u_int *share; 67 68#define PARALLEL 6 69#define RUNTIME (5 * 60) 70#define SYNC 0 71 72static void 73test(char *s) 74{ 75 time_t start; 76 size_t i, len; 77 char *cp; 78 79 atomic_add_int(&share[SYNC], 1); 80 while (share[SYNC] != PARALLEL) 81 ; 82 start = time(NULL); 83 while ((time(NULL) - start) < RUNTIME) { 84 len = atol(s) / PARALLEL; 85 len = len / 10 * 8; 86 if ((cp = mmap(NULL, len, PROT_READ | PROT_WRITE, 87 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 88 err(1, "mmap(%zd)", len); 89 for (i = 0; i < len; i += PAGE_SIZE) 90 cp[i] = 1; 91 if (munmap(cp, len) == -1) 92 err(1, "unmap"); 93 } 94 95 _exit(0); 96} 97 98int 99main(int argc __unused, char *argv[]) 100{ 101 pid_t pids[PARALLEL]; 102 size_t len; 103 int e, i, status; 104 105 e = 0; 106 len = PAGE_SIZE; 107 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 108 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 109 err(1, "mmap"); 110 111 for (i = 0; i < PARALLEL; i++) { 112 if ((pids[i] = fork()) == 0) 113 test(argv[1]); 114 if (pids[i] == -1) 115 err(1, "fork()"); 116 } 117 for (i = 0; i < PARALLEL; i++) { 118 if (waitpid(pids[i], &status, 0) == -1) 119 err(1, "waitpid(%d)", pids[i]); 120 if (status != 0) { 121 if (WIFSIGNALED(status)) 122 fprintf(stderr, 123 "pid %d exit signal %d\n", 124 pids[i], WTERMSIG(status)); 125 } 126 e += status == 0 ? 0 : 1; 127 } 128 129 return (e); 130} 131