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# Test scenario for 2MB page promotions. 30# No problems seen. 31 32. ../default.cfg 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34[ "`uname -p`" = "amd64" ] || exit 0 35 36dir=/tmp 37odir=`pwd` 38cd $dir 39sed '1,/^EOF/d' < $odir/$0 > $dir/mmap31.c 40mycc -o mmap31 -Wall -Wextra -O0 -g mmap31.c || exit 1 41rm -f mmap31.c 42cd $odir 43 44(cd ../testcases/swap; ./swap -t 10m -i 20) > /dev/null & 45 46/tmp/mmap31 47s=$? 48kill $! 2>/dev/null 49while pkill -9 swap; do :; done 50wait 51 52rm -rf /tmp/mmap31 53exit $s 54 55EOF 56#include <sys/param.h> 57#include <sys/mman.h> 58#include <sys/stat.h> 59#include <sys/wait.h> 60 61#include <machine/atomic.h> 62 63#include <err.h> 64#include <errno.h> 65#include <fcntl.h> 66#include <stdio.h> 67#include <stdlib.h> 68#include <signal.h> 69#include <time.h> 70#include <unistd.h> 71 72#define SEGS 512 73static size_t l[SEGS]; 74static char *c[SEGS]; 75static volatile char r; 76static volatile u_int *share; 77 78#define PARALLEL 8 79#define RUNTIME (2 * 60) 80#define SYNC 0 81 82static void 83handler(int s __unused) 84{ 85 _exit(0); 86} 87 88static void 89touch(void) 90{ 91 time_t t; 92 int idx; 93 char *c1; 94 95 t = time(NULL); 96 while (time(NULL) - t < 5) { 97 idx = arc4random() % SEGS; 98 c1 = c[idx]; 99 idx = arc4random() % l[idx]; 100 r += c1[idx]; 101 c1[idx] += 1; 102 } 103} 104 105static void 106test(void) 107{ 108 pid_t pid; 109 int i, mode, status; 110 111 r = 0; 112 for (i = 0; i < SEGS; i++) { 113 l[i] = (arc4random() % 512 + 1) * PAGE_SIZE; 114 mode = PROT_READ | PROT_WRITE; 115 if ((c[i] = (char *)mmap(NULL, l[i], mode, 116 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 117 err(1, "mmap"); 118 } 119 120 if ((pid = fork()) == 0) { 121 signal(SIGHUP, handler); 122 atomic_add_int(&share[SYNC], 1); 123 while (share[SYNC] != PARALLEL) 124 ; 125 touch(); 126 pause(); 127 _exit(0); 128 } 129 130 while (share[SYNC] != PARALLEL) 131 ; 132 touch(); 133 134 kill(pid, SIGHUP); 135 if (waitpid(pid, &status, 0) != pid) 136 err(1, "waitpid"); 137 if (status != 0) 138 errx(1, "child status = %d", status); 139 140 _exit(status); 141} 142 143int 144main(void) 145{ 146 pid_t pids[PARALLEL]; 147 size_t len; 148 time_t start; 149 int e, i, status; 150 151 e = 0; 152 len = PAGE_SIZE; 153 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 154 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 155 err(1, "mmap"); 156 157 start = time(NULL); 158 while ((time(NULL) - start) < RUNTIME && e == 0) { 159 share[SYNC] = 0; 160 for (i = 0; i < PARALLEL; i++) { 161 if ((pids[i] = fork()) == 0) 162 test(); 163 if (pids[i] == -1) 164 err(1, "fork()"); 165 } 166 for (i = 0; i < PARALLEL; i++) { 167 if (waitpid(pids[i], &status, 0) == -1) 168 err(1, "waitpid(%d)", pids[i]); 169 e += status == 0 ? 0 : 1; 170 } 171 } 172 173 return (e); 174} 175