138 lines
3.5 KiB
Bash
Executable File
138 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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# PTHREAD_PRIO_INHERIT test scenario
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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 > pthread8.c
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mycc -o pthread8 -Wall -Wextra -O0 -g pthread8.c -lpthread || exit 1
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rm -f pthread8.c /tmp/pthread8.core
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/tmp/pthread8
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rm -f /tmp/pthread8
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exit 0
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EOF
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/* $Id: pi.c,v 1.2 2015/01/31 11:36:07 kostik Exp kostik $ */
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <pthread.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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struct runner_arg {
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pthread_mutex_t *locks;
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u_int lock_cnt;
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};
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int stop;
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void *
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runner(void *arg)
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{
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struct runner_arg *ra;
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pthread_mutex_t *l;
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u_int i;
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int error;
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ra = arg;
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while (stop == 0) {
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for (i = 0; i < ra->lock_cnt; i++) {
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l = &ra->locks[i];
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error = pthread_mutex_lock(l);
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if (error != 0)
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errc(1, error, "pthread_mutex_lock");
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pthread_yield();
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}
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for (i = 0; i < ra->lock_cnt; i++) {
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l = &ra->locks[i];
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error = pthread_mutex_unlock(l);
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if (error != 0)
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errc(1, error, "pthread_mutex_lock");
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pthread_yield();
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}
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}
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return (NULL);
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}
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int
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main(void)
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{
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struct runner_arg ra;
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time_t start;
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pthread_t *threads;
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pthread_mutexattr_t mattr;
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u_int i, ncpus;
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int error;
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size_t ncpus_len;
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ncpus_len = sizeof(ncpus);
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error = sysctlbyname("hw.ncpu", &ncpus, &ncpus_len, NULL, 0);
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if (error != 0)
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err(1, "sysctl hw.ncpus");
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threads = calloc(ncpus, sizeof(pthread_t));
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if (threads == NULL)
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err(1, "calloc threads");
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ra.lock_cnt = 100;
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ra.locks = calloc(ra.lock_cnt, sizeof(pthread_mutex_t));
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if (ra.locks == NULL)
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err(1, "calloc locks");
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error = pthread_mutexattr_init(&mattr);
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if (error != 0)
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errc(1, error, "pthread_mutexattr_init");
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error = pthread_mutexattr_setprotocol(&mattr, PTHREAD_PRIO_INHERIT);
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if (error != 0)
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errc(1, error, "pthread_mutexattr_setprotocol PRIO_INHERIT");
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for (i = 0; i < ra.lock_cnt; i++) {
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error = pthread_mutex_init(&ra.locks[i], &mattr);
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if (error != 0)
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errc(1, error, "pthread_mutex_init");
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}
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for (i = 0; i < ncpus; i++) {
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error = pthread_create(&threads[i], NULL, runner, &ra);
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if (error != 0)
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errc(1, error, "pthread_create");
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}
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start = time(NULL);
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while (time(NULL) - start < 180)
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sleep(1);
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stop = 1;
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for (i = 0; i < ncpus; i++)
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pthread_join(threads[i], NULL);
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return (0);
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}
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