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/*
* pthreadtest.c: a stupid nop loop with pthreads
*
* Copyright (c) 2003-2006 Hewlett-Packard Development Company, L.P.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
#include <sys/types.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/wait.h>
void
noploop(void *data)
{
uint64_t loop = *(uint64_t *)data;
unsigned int ret = 0;
int retval = 0;
while ( loop-- ) ret +=getpid();
pthread_exit((void *)&retval);
}
int
main(int argc, char **argv)
{
pthread_t *thread_list;
uint64_t loop;
int nt, nthreads = 0, ret;
loop = argc > 1 ? strtoull(argv[1], NULL, 0) : 1000;
nt = argc > 2 ? atoi(argv[2]) : 0;
printf("creating %d thread(s)\n", nt);
printf("%"PRIu64" iterations\n", loop);
thread_list = malloc(nt*sizeof(pthread_t));
if (thread_list == NULL) {
fprintf(stderr, "cannot malloc thread table for %d threads\n", nthreads);
exit(1);
}
while (nt--) {
ret = pthread_create(&thread_list[nt], NULL, (void *(*)(void *))noploop, &loop);
if (ret == -1) goto cleanup;
nthreads++;
}
noploop(&loop);
cleanup:
while(nthreads--) {
pthread_join(thread_list[nthreads], NULL);
}
exit(0);
}
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