tests/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_GLOBAL_META(T_META_TAG_PERF);
  12
  13 T_DECL(gettimeofday_tl, "gettimeofday performance in tight loop") {
  14         {
  15                 struct timeval time;
  16                 dt_stat_time_t s = dt_stat_time_create("gettimeofday tight loop");
  17                 T_STAT_MEASURE_LOOP(s){
  18                         gettimeofday(&time, NULL);
  19                 }
  20                 dt_stat_finalize(s);
  21         }
  22 }
  23
  24 extern int __gettimeofday(struct timeval *, struct timezone *);
  25 T_DECL(__gettimeofday_tl, "__gettimeofday performance in tight loop") {
  26         {
  27                 struct timeval time;
  28
  29                 dt_stat_time_t s = dt_stat_time_create("__gettimeofday tight loop");
  30                 T_STAT_MEASURE_LOOP(s){
  31                         __gettimeofday(&time, NULL);
  32                 }
  33                 dt_stat_finalize(s);
  34         }
  35 }
  36
  37 T_DECL(gettimeofday_sl, "gettimeofday performance in loop with sleep") {
  38         {
  39                 struct timeval time;
  40                 dt_stat_time_t s = dt_stat_time_create("gettimeofday loop with sleep");
  41                 while (!dt_stat_stable(s)) {
  42                         T_STAT_MEASURE_BATCH(s){
  43                                 gettimeofday(&time, NULL);
  44                         }
  45                         sleep(1);
  46                 }
  47                 dt_stat_finalize(s);
  48         }
  49 }