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165 lines
3.9 KiB
Bash
Executable file
165 lines
3.9 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org>
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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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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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# core dumps seen in watchdogd after mlockall() was added.
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# This scenario demonstrates the problem. Fixed in r242012.
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# "panic: freeing mapped page 0xfffff8181b38a5e8" seen:
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# https://people.freebsd.org/~pho/stress/log/mark030.txt
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mem=`sysctl -n hw.usermem`
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[ `sysctl -n vm.swap_total` -eq 0 ] && mem=$((mem / 100 * 60))
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > mlockall2.c
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mycc -o mlockall2 -Wall -Wextra -O2 -g mlockall2.c || exit 1
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rm -f mlockall2.c
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cd $here
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rm -f mlockall2.core
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/tmp/mlockall2 $mem &
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while kill -0 $! 2>/dev/null; do
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[ -r mlockall2.core ] && kill $! && break
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sleep 10
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done
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[ -r mlockall2.core ] && s=1 || s=0
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pkill mlockall2
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wait
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rm -f /tmp/mlockall2 mlockall2.core
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exit $s
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EOF
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/rtprio.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <signal.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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#define LOAD 40
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#define N 90000
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#define PARALLEL 5
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#define RUNTIME 600
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static long size;
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static void
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swap(void)
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{
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long i;
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int page;
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volatile char *c;
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setproctitle("swap");
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c = malloc(size);
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while (c == NULL) {
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size -= 1024 * 1024;
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c = malloc(size);
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}
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page = getpagesize();
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for (;;) {
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i = 0;
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while (i < size) {
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c[i] = 0;
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i += page;
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}
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}
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}
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static void
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test(void)
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{
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pid_t p;
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int i, status;
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setproctitle("test");
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for (i = 0; i < N; i++) {
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if ((p = fork()) == 0) {
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_exit(0);
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}
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if (p > 0)
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waitpid(p, &status, 0);
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if (status != 0)
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break;
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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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time_t start;
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struct rtprio rtp;
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pid_t pids[LOAD], pids2[PARALLEL];
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int i;
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size = atol(argv[1]) / LOAD * 1.5;
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for (i = 0; i < LOAD; i++)
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if ((pids[i] = fork()) == 0)
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swap();
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sleep(10);
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rtp.type = RTP_PRIO_REALTIME;
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rtp.prio = 0;
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if (rtprio(RTP_SET, 0, &rtp) == -1)
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err(1, "rtprio");
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if (madvise(0, 0, MADV_PROTECT) != 0)
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err(1, "madvise failed");
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if (mlockall(MCL_CURRENT | MCL_FUTURE) != 0)
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err(1, "mlockall failed");
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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for (i = 0; i < PARALLEL; i++) {
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if ((pids2[i] = fork()) == 0)
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test();
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}
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for (i = 0; i < PARALLEL; i++)
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if (waitpid(pids2[i], NULL, 0) != pids2[i])
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err(1, "waitpid(%d) (2)", pids2[i]);
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if (access("mlockall2.core", R_OK) == 0)
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break;
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}
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for (i = 0; i < LOAD; i++)
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kill(pids[i], SIGKILL);
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for (i = 0; i < LOAD; i++)
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if (waitpid(pids[i], NULL, 0) != pids[i])
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err(1, "waitpid(%d)", pids[i]);
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return (0);
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}
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