xref: /OK3568_Linux_fs/kernel/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * Copyright 2015, Anton Blanchard, IBM Corp.
4*4882a593Smuzhiyun  */
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #include <sys/time.h>
7*4882a593Smuzhiyun #include <stdio.h>
8*4882a593Smuzhiyun 
9*4882a593Smuzhiyun #include "utils.h"
10*4882a593Smuzhiyun 
test_gettimeofday(void)11*4882a593Smuzhiyun static int test_gettimeofday(void)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun 	int i;
14*4882a593Smuzhiyun 
15*4882a593Smuzhiyun 	struct timeval tv_start, tv_end;
16*4882a593Smuzhiyun 
17*4882a593Smuzhiyun 	gettimeofday(&tv_start, NULL);
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun 	for(i = 0; i < 100000000; i++) {
20*4882a593Smuzhiyun 		gettimeofday(&tv_end, NULL);
21*4882a593Smuzhiyun 	}
22*4882a593Smuzhiyun 
23*4882a593Smuzhiyun 	printf("time = %.6f\n", tv_end.tv_sec - tv_start.tv_sec + (tv_end.tv_usec - tv_start.tv_usec) * 1e-6);
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun 	return 0;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun 
main(void)28*4882a593Smuzhiyun int main(void)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun 	return test_harness(test_gettimeofday, "gettimeofday");
31*4882a593Smuzhiyun }
32