starpu-max/tests/main/multithreaded_init.c

/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2010  Institut National de Recherche en Informatique et Automatique
 * Copyright (C) 2010-2011  Université de Bordeaux 1
 *
 * StarPU is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * StarPU 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 Lesser General Public License in COPYING.LGPL for more details.
 */
#include <sys/time.h>
#include <stdio.h>
#include <pthread.h>
#include <starpu.h>
#include "../helper.h"

#define NUM_THREADS 5

void *launch_starpu(void *unused)
{
	int ret;
	(void) unused;
	ret = starpu_init(NULL);
	if (ret == -ENODEV)
		exit(STARPU_TEST_SKIPPED);
	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
	return NULL;
}

void *shutdown_starpu(void *unused)
{
	(void) unused;
	starpu_shutdown();
	return NULL;
}

int main(int argc, char **argv)
{
	unsigned i;
	double timing;
	struct timeval start;
	struct timeval end;

	pthread_t threads[NUM_THREADS];

	gettimeofday(&start, NULL);

	for (i = 0; i < NUM_THREADS; ++i)
	{
		int ret = pthread_create(&threads[i], NULL, launch_starpu, NULL);
		STARPU_ASSERT(ret == 0);
	}

	for (i = 0; i < NUM_THREADS; ++i)
	{
		int ret = pthread_join(threads[i], NULL);
		STARPU_ASSERT(ret == 0);
	}

	gettimeofday(&end, NULL);

	timing = (double)((end.tv_sec - start.tv_sec)*1000000 + (end.tv_usec - start.tv_usec));

	FPRINTF(stderr, "Success : %d threads launching simultaneously starpu_init\n", NUM_THREADS);
	FPRINTF(stderr, "Total: %f secs\n", timing/1000000);
	FPRINTF(stderr, "Per task: %f usecs\n", timing/NUM_THREADS);

	for (i = 0; i < NUM_THREADS; i++)
	{
		int ret = pthread_create(&threads[i], NULL, shutdown_starpu, NULL);
		STARPU_ASSERT(ret == 0);
	}

	for (i = 0; i < NUM_THREADS; i++)
	{
		int ret = pthread_join(threads[i], NULL);
		STARPU_ASSERT(ret == 0);
	}

	return EXIT_SUCCESS;
}