tools/tests/darwintests/gettimeofday_29192647.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <sys/stat.h>
   5 #include <mach/mach_time.h>
   6 #include <sys/time.h>
   7
   8 #include <darwintest.h>
   9 #include <darwintest_perf.h>
  10
  11 T_DECL(gettimeofday_tl, "gettimeofday performance in tight loop") {
  12         {
  13                 struct timeval time;
  14                 dt_stat_time_t s = dt_stat_time_create("gettimeofday tight loop");
  15                 T_STAT_MEASURE_LOOP(s){
  16                         gettimeofday(&time, NULL);
  17                 }
  18                 dt_stat_finalize(s);
  19         }
  20 }
  21
  22 extern int __gettimeofday(struct timeval *, struct timezone *);
  23 T_DECL(__gettimeofday_tl, "__gettimeofday performance in tight loop") {
  24         {
  25                 struct timeval time;
  26
  27                 dt_stat_time_t s = dt_stat_time_create("__gettimeofday tight loop");
  28                 T_STAT_MEASURE_LOOP(s){
  29                         __gettimeofday(&time, NULL);
  30                 }
  31                 dt_stat_finalize(s);
  32         }
  33 }
  34
  35 T_DECL(gettimeofday_sl, "gettimeofday performance in loop with sleep") {
  36         {
  37                 struct timeval time;
  38                 dt_stat_time_t s = dt_stat_time_create("gettimeofday loop with sleep");
  39                 while (!dt_stat_stable(s)) {
  40                         T_STAT_MEASURE_BATCH(s){
  41                                 gettimeofday(&time, NULL);
  42                         }
  43                         sleep(1);
  44                 }
  45                 dt_stat_finalize(s);
  46         }
  47 }