131 lines
3.3 KiB
Bash
Executable File
131 lines
3.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2018 Dell EMC Isilon
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Free page shortage test scenario
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# No problems seen
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. ../default.cfg
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[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/freepages.c
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mycc -o freepages -Wall -Wextra -O0 -g freepages.c || exit 1
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rm -f freepages.c
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cd $odir
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$dir/freepages `sysctl -n hw.usermem`
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s=$?
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[ -f freepages.core -a $s -eq 0 ] &&
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{ ls -l freepages.core; mv freepages.core /tmp; s=1; }
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rm -rf $dir/freepages
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exit $s
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EOF
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <machine/atomic.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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static volatile u_int *share;
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#define PARALLEL 6
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#define RUNTIME (5 * 60)
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#define SYNC 0
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static void
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test(char *s)
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{
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time_t start;
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size_t i, len;
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char *cp;
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atomic_add_int(&share[SYNC], 1);
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while (share[SYNC] != PARALLEL)
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;
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start = time(NULL);
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while ((time(NULL) - start) < RUNTIME) {
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len = atol(s) / PARALLEL;
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len = len / 10 * 8;
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if ((cp = mmap(NULL, len, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
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err(1, "mmap(%zd)", len);
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for (i = 0; i < len; i += PAGE_SIZE)
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cp[i] = 1;
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if (munmap(cp, len) == -1)
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err(1, "unmap");
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}
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_exit(0);
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}
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int
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main(int argc __unused, char *argv[])
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{
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pid_t pids[PARALLEL];
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size_t len;
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int e, i, status;
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e = 0;
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len = PAGE_SIZE;
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if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
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err(1, "mmap");
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for (i = 0; i < PARALLEL; i++) {
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if ((pids[i] = fork()) == 0)
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test(argv[1]);
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if (pids[i] == -1)
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err(1, "fork()");
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}
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for (i = 0; i < PARALLEL; i++) {
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if (waitpid(pids[i], &status, 0) == -1)
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err(1, "waitpid(%d)", pids[i]);
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if (status != 0) {
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if (WIFSIGNALED(status))
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fprintf(stderr,
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"pid %d exit signal %d\n",
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pids[i], WTERMSIG(status));
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}
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e += status == 0 ? 0 : 1;
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}
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return (e);
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}
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