tools/testing/selftests/powerpc/benchmarks/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
  11 static 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
  30 int main(void)
  31 {
  32         return test_harness(test_gettimeofday, "gettimeofday");
  33 }