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160 lines
4 KiB
Bash
Executable file
160 lines
4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2014 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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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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# Show scheduler fairness for ULE vs. 4BSD.
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > sched.c
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mycc -o sched -Wall -Wextra -O0 sched.c || exit 1
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rm -f sched.c
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cd $here
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mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
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mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart
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mdconfig -a -t swap -s 1g -u $mdstart || exit 1
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newfs $newfs_flags md$mdstart > /dev/null
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mount /dev/md$mdstart $mntpoint
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chmod 777 $mntpoint
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cpus=`sysctl hw.ncpu | sed 's/.*: //'`
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uname -v
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(cd $mntpoint; /tmp/sched $((cpus + 1))) > /dev/null 2>&1 &
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sleep 30
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export LANG=C
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top -U nobody -d 1 | grep nobody | awk '{print $11}' | sed 's/%//' |
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ministat -A -w 73 | tail -1 | awk '{if ($NF > 1.0) exit 1}' ||
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{ echo Broken; top -U nobody -d 1 | grep nobody; }
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killall sched
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wait
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for i in `jot 3`; do
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echo "run #$i"
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(cd $mntpoint; /tmp/sched $((cpus + 1)))
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done
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while mount | grep $mntpoint | grep -q /dev/md; do
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umount $mntpoint || sleep 1
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done
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rm -f /tmp/sched
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mdconfig -d -u $mdstart
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exit
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EOF
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#include <sys/param.h>
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#include <sys/stat.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 <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <libutil.h>
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#include <pwd.h>
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#include <sched.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define N 100 * 1024 * 1024
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double r;
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int parallel;
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void
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work(void)
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{
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struct passwd *pw;
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struct timespec start, finish;
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double d1, d2;
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int i, j;
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volatile char *cp;
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while (access("rendezvous", R_OK) != 0)
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usleep(1);
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if ((pw = getpwnam("nobody")) == NULL)
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err(1, "no such user: nobody");
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if (setgroups(1, &pw->pw_gid) ||
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setegid(pw->pw_gid) || setgid(pw->pw_gid) ||
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seteuid(pw->pw_uid) || setuid(pw->pw_uid))
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err(1, "Can't drop privileges to \"nobody\"");
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endpwent();
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d1 = d2 = 0;
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cp = malloc(N);
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clock_gettime(CLOCK_REALTIME_PRECISE, &start);
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for (i = 0; i < 1; i++) {
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for (j = 0; j < INT_MAX; j++) {
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d1 = d1 + 1.0 / j;
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d2 = d1 + 0.8 / j;
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if (j % 1000 == 0) {
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cp[arc4random() % N] = j % 255;
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}
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}
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}
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r = d1 + d2;
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clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
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timespecsub(&finish, &start, &finish);
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#if defined(DEBUG)
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fprintf(stderr, "Elapsed time for pid %d: %.4f\n", getpid(),
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finish.tv_sec + (double)finish.tv_nsec / 1e9);
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#endif
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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 fd, i;
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if (argc == 2)
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parallel = atoi(argv[1]);
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else
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errx(1, "Usage: %s <cpus>", argv[0]);
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for (i = 0; i < parallel; i++) {
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if (fork() == 0)
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work();
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}
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if ((fd = open("rendezvous", O_CREAT, 0644)) == -1)
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err(1, "open()");
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close(fd);
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for (i = 0; i < parallel; i++)
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wait(NULL);
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return (0);
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}
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