gettimeofday.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2015, Anton Blanchard, IBM Corp.
 4 */
 5
 6#include <sys/time.h>
 7#include <stdio.h>
 8
 9#include "utils.h"
10
11static int test_gettimeofday(void)
12{
13	int i;
14
15	struct timeval tv_start, tv_end, tv_diff;
16
17	gettimeofday(&tv_start, NULL);
18
19	for(i = 0; i < 100000000; i++) {
20		gettimeofday(&tv_end, NULL);
21	}
22
23	timersub(&tv_end, &tv_start, &tv_diff);
24
25	printf("time = %.6f\n", tv_diff.tv_sec + (tv_diff.tv_usec) * 1e-6);
26
27	return 0;
28}
29
30int main(void)
31{
32	return test_harness(test_gettimeofday, "gettimeofday");
33}