#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>

#define ONESEC	1000
#define NUM_ITERATIONS	20
#define THREAD_NUM 10

static int64_t omrtime_current_time_millis()
{
	struct timeval tp;

	gettimeofday(&tp, NULL);
	return ((int64_t)tp.tv_sec) * 1000 + tp.tv_usec / 1000;
}

static void cpuLoad(void)
{
	int64_t end = 0;
	int64_t start = omrtime_current_time_millis();

	do {
		end = omrtime_current_time_millis();
		/* usleep(1); */
	} while ((end - start) < ONESEC);
}

static void *runTest(void *arg)
{
	for (int i = 0; i < NUM_ITERATIONS; i++) {
		cpuLoad();
	}
	return NULL;
}

int main()
{
	int i;
	int rc;
	pthread_t thr[THREAD_NUM];

	for (i = 0; i < THREAD_NUM; i++) {
		rc = pthread_create(&thr[i], NULL, runTest, NULL);
		if (rc != 0) {
			printf("pthread_create() failed: i=%d rc=%d\n", i, rc);
			return -1;
		}
	}

	for (i = 0; i < THREAD_NUM; i++) {
		pthread_join(thr[i], NULL);
	}

	puts("Finished");

	return 0;
}