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131 lines
3.4 KiB
Bash
Executable file
131 lines
3.4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2016 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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# This problem was seen with WiP kernel code:
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# https://people.freebsd.org/~pho/stress/log/kostik1210.txt
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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 > context2.c
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mycc -o context2 -Wall -Wextra -O2 context2.c -lpthread || exit 1
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rm -f context2.c
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[ -d $RUNDIR ] || mkdir -p $RUNDIR
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cd $RUNDIR
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daemon sh -c "(cd $here/../testcases/swap; ./swap -t 10m -i 20)" > \
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/dev/null 2>&1
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for i in `jot 4`; do
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/tmp/context2 &
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done
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wait
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while pgrep -q swap; do
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pkill -9 swap
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done
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rm -f /tmp/context2
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exit 0
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EOF
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/*
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* Inspired by lmbench-3.0-a9/src/lat_ctx.c
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* Pass a token thru pipes to NTHREADS+1 threads in a circular list.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <pthread.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 <time.h>
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#include <unistd.h>
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#define NTHREADS 64
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#define RUNTIME 300
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pid_t pid[NTHREADS];
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int fds[NTHREADS+1][2];
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void *
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thr_routine(void *arg)
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{
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int i;
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int token;
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i = (long)arg;
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for (;;) {
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if (read(fds[i][0], &token, sizeof(token)) != sizeof(token))
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err(1, "read pipe 2");
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token++;
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if (write(fds[i+1][1], &token, sizeof(token)) != sizeof(token))
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err(1, "write pipe 1");
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}
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return (0);
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}
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int
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main(void)
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{
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pthread_t threads[NTHREADS];
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time_t start;
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long arg;
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int i, r, token;
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for (i = 0; i < NTHREADS + 1; i++) {
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if (pipe(fds[i]) == -1)
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err(1, "pipe");
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}
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for (i = 0; i < NTHREADS; i++) {
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arg = i;
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if ((r = pthread_create(&threads[i], NULL, thr_routine,
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(void *)arg)) != 0)
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errc(1, r, "pthread_create(): %s\n", strerror(r));
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}
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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token = 0;
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if (write(fds[0][1], &token, sizeof(token)) != sizeof(token))
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err(1, "write pipe 2");
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if (read(fds[NTHREADS][0], &token, sizeof(token)) !=
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sizeof(token))
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err(1, "read pipe 1");
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}
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for (i = 0; i < NTHREADS; i++)
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if ((r = pthread_cancel(threads[i])) != 0)
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errc(1, r, "pthread_cancel(%d)", i);
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for (i = 0; i < NTHREADS; i++)
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if ((r = pthread_join(threads[i], NULL)) != 0)
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errc(1, r, "pthread_join(%d)", i);
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return (0);
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}
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