137 lines
3.5 KiB
Bash
Executable File
137 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2015 EMC Corp.
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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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# Out of VM deadlock seen. Introduced by r285808. Variation of oovm.sh
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# https://people.freebsd.org/~pho/stress/log/oovm2.txt
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# Fixed by r290047 and <alc's PQ_LAUNDRY patch>
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# Test scenario suggestion by alc@
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. ../default.cfg
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[ `swapinfo | wc -l` -eq 1 ] && exit 0
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maxsize=$((2 * 1024)) # Limit size due to runtime reasons
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size=$((`sysctl -n hw.physmem` / 1024 / 1024))
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[ $size -gt $maxsize ] && size=$maxsize
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d1=$diskimage.1
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d2=$diskimage.2
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d3=$diskimage.3
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d4=$diskimage.4
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rm -f $d1 $d2 $d3 $d4
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[ `df -k $(dirname $diskimage) | tail -1 | awk '{print int($4 / 1024)}'` -lt \
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$size ] && printf "Need %d MB on %s.\n" $size `dirname $diskimage` && exit
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dd if=/dev/zero of=$d1 bs=1m count=$((size / 4)) status=none
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cp $d1 $d2 || exit
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cp $d1 $d3 || exit
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cp $d1 $d4 || exit
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trap "rm -f $d1 $d2 $d3 $d4" EXIT INT
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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/oovm2.c
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mycc -o oovm2 -Wall -Wextra -g oovm2.c || exit 1
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rm -f oovm2.c
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cd $odir
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(cd /tmp; /tmp/oovm2 $d1) &
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(cd /tmp; /tmp/oovm2 $d2) &
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(cd /tmp; /tmp/oovm2 $d3) &
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(cd /tmp; /tmp/oovm2 $d4) &
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wait
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rm -f /tmp/oovm2 /tmp/oovm2.core
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exit
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EOF
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#include <sys/param.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.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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const char *file;
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#define RUNTIME 600
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void
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test(void)
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{
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struct stat st;
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size_t i, olen, len;
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time_t start;
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int error, fd, ps;
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char *p;
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ps = getpagesize();
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if ((fd = open(file, O_RDWR)) == -1)
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err(1, "open(%s)", file);
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if ((error = fstat(fd, &st)) == -1)
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err(1, "stat(%s)", file);
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len = olen = round_page(st.st_size);
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do {
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if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED,
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fd, 0)) == MAP_FAILED) {
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if (errno == ENOMEM)
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len -= ps;
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else
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err(1, "mmap");
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}
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} while (p == MAP_FAILED);
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start = time(NULL);
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/* Touch all pages of the file. */
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for (i = 0; i < len; i += ps)
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p[i] = 1;
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while (time(NULL) - start < RUNTIME)
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p[arc4random() % len] = 1;
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if (munmap(p, len) == -1)
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err(1, "unmap()");
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close(fd);
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}
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int
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main(int argc, char *argv[])
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{
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if (argc != 2)
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errx(1, "Usage: %s <file>", argv[0]);
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file = argv[1];
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test();
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return (0);
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}
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