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117 lines
2.8 KiB
Bash
Executable file
117 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2019 Dell EMC Isilon
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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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# Test scenario based on alc@'s suggestion for D19826
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# No problems seen.
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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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 > $dir/vm_map.c
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mycc -o vm_map -Wall -Wextra -O2 vm_map.c || exit 1
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rm -f vm_map.c
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pages=$((`sysctl -n hw.usermem` / `sysctl -n hw.pagesize`))
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[ `sysctl -n vm.swap_total` -eq 0 ] &&
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pages=$((pages / 10 * 8))
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/tmp/vm_map $pages
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rm -f /tmp/vm_map
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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/time.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static long n;
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#define RUNTIME (2 * 60)
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#define INCARNATIONS 32
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int
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test(void)
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{
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size_t len;
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time_t start;
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void *a;
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char **c;
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int i;
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a = NULL;
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c = calloc(n, sizeof(char *));
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len = PAGE_SIZE;
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start = time(NULL);
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while ((time(NULL) - start) < RUNTIME) {
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for (i = 0; i < n; i++) {
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if ((a = mmap((void *)a, 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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c[i] = a;
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*c[i] = 1;
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a += PAGE_SIZE;
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}
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for (i = 0; i < n; i++) {
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if (munmap(c[i], PAGE_SIZE) == -1)
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err(1, "munmap(%p)", c[i]);
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}
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a = NULL;
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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, char *argv[])
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{
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int i;
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if (argc != 2) {
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fprintf(stderr, "Usage %s <pages>\n", argv[0]);
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exit(1);
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}
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n = atol(argv[1]) / INCARNATIONS;
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for (i = 0; i < INCARNATIONS; i++)
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if (fork() == 0)
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test();
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for (i = 0; i < INCARNATIONS; i++)
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wait(NULL);
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return (0);
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}
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