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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#define OMPI_BUILDING 0
#include "opal_config.h"
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include "opal/sys/atomic.h"
#define TEST_REPS 500
int atomic_verbose = 0;
struct start_info {
int tid;
int count;
opal_atomic_lock_t *lock;
};
static int atomic_spinlock_test(opal_atomic_lock_t *lock, int count, int id);
static void* atomic_spinlock_start(void* arg)
{
struct start_info *data = (struct start_info*) arg;
return (void*) (unsigned long) atomic_spinlock_test(data->lock, data->count,
data->tid);
}
static int
atomic_spinlock_test_th(opal_atomic_lock_t *lock, int count, int id, int thr_count)
{
pthread_t *th;
int tid, ret = 0;
struct start_info *data;
th = (pthread_t *) malloc(thr_count * sizeof(pthread_t));
if (!th) { perror("malloc"); exit(EXIT_FAILURE); }
data = (struct start_info *) malloc(thr_count * sizeof(struct start_info));
if (!th) { perror("malloc"); exit(EXIT_FAILURE); }
for (tid = 0; tid < thr_count; tid++) {
data[tid].tid = tid;
data[tid].count = count;
data[tid].lock = lock;
if (pthread_create(&th[tid], NULL, atomic_spinlock_start, (void *) &(data[tid])) != 0) {
perror("pthread_create");
exit(EXIT_FAILURE);
}
}
/* -- wait for the thread set to finish -- */
for (tid = 0; tid < thr_count; tid++) {
void *thread_return;
if (pthread_join(th[tid], &thread_return) != 0) {
perror("pthread_join");
exit(EXIT_FAILURE);
}
ret += (int) (unsigned long) thread_return;
}
free(data);
free(th);
return ret;
}
static int
atomic_spinlock_test(opal_atomic_lock_t *lock, int count, int id)
{
int i;
for (i = 0 ; i < count ; ++i) {
opal_atomic_lock(lock);
if (atomic_verbose) { printf("id %03d has the lock (lock)\n", id); }
opal_atomic_unlock(lock);
while (opal_atomic_trylock(lock)) { ; }
if (atomic_verbose) { printf("id %03d has the lock (trylock)\n", id); }
opal_atomic_unlock(lock);
}
return 0;
}
int
main(int argc, char *argv[])
{
int ret = 77;
opal_atomic_lock_t lock;
int num_threads = 1;
if (argc != 2) {
printf("*** Incorrect number of arguments. Skipping test\n");
return 77;
}
num_threads = atoi(argv[1]);
opal_atomic_lock_init(&lock, OPAL_ATOMIC_LOCK_UNLOCKED);
ret = atomic_spinlock_test_th(&lock, TEST_REPS, 0, num_threads);
return ret;
}
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