1*4d495c6eSApple OSS Distributions #include <stdio.h> 2*4d495c6eSApple OSS Distributions #include <stdlib.h> 3*4d495c6eSApple OSS Distributions #include <unistd.h> 4*4d495c6eSApple OSS Distributions #include <sys/stat.h> 5*4d495c6eSApple OSS Distributions #include <mach/mach_time.h> 6*4d495c6eSApple OSS Distributions #include <sys/time.h> 7*4d495c6eSApple OSS Distributions 8*4d495c6eSApple OSS Distributions #include <darwintest.h> 9*4d495c6eSApple OSS Distributions #include <darwintest_perf.h> 10*4d495c6eSApple OSS Distributions 11*4d495c6eSApple OSS Distributions T_GLOBAL_META(T_META_TAG_PERF); 12*4d495c6eSApple OSS Distributions 13*4d495c6eSApple OSS Distributions T_DECL(gettimeofday_tl, "gettimeofday performance in tight loop", T_META_TAG_VM_NOT_ELIGIBLE) { 14*4d495c6eSApple OSS Distributions { 15*4d495c6eSApple OSS Distributions struct timeval time; 16*4d495c6eSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("gettimeofday tight loop"); T_STAT_MEASURE_LOOP(s)17*4d495c6eSApple OSS Distributions T_STAT_MEASURE_LOOP(s){ 18*4d495c6eSApple OSS Distributions gettimeofday(&time, NULL); 19*4d495c6eSApple OSS Distributions } 20*4d495c6eSApple OSS Distributions dt_stat_finalize(s); 21*4d495c6eSApple OSS Distributions } 22*4d495c6eSApple OSS Distributions } 23*4d495c6eSApple OSS Distributions 24*4d495c6eSApple OSS Distributions extern int __gettimeofday(struct timeval *, struct timezone *); 25*4d495c6eSApple OSS Distributions T_DECL(__gettimeofday_tl, "__gettimeofday performance in tight loop", T_META_TAG_VM_NOT_ELIGIBLE) { 26*4d495c6eSApple OSS Distributions { 27*4d495c6eSApple OSS Distributions struct timeval time; 28*4d495c6eSApple OSS Distributions 29*4d495c6eSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("__gettimeofday tight loop"); T_STAT_MEASURE_LOOP(s)30*4d495c6eSApple OSS Distributions T_STAT_MEASURE_LOOP(s){ 31*4d495c6eSApple OSS Distributions __gettimeofday(&time, NULL); 32*4d495c6eSApple OSS Distributions } 33*4d495c6eSApple OSS Distributions dt_stat_finalize(s); 34*4d495c6eSApple OSS Distributions } 35*4d495c6eSApple OSS Distributions } 36*4d495c6eSApple OSS Distributions 37*4d495c6eSApple OSS Distributions T_DECL(gettimeofday_sl, "gettimeofday performance in loop with sleep", T_META_TAG_VM_NOT_ELIGIBLE) { 38*4d495c6eSApple OSS Distributions { 39*4d495c6eSApple OSS Distributions struct timeval time; 40*4d495c6eSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("gettimeofday loop with sleep"); 41*4d495c6eSApple OSS Distributions while (!dt_stat_stable(s)) { T_STAT_MEASURE_BATCH(s)42*4d495c6eSApple OSS Distributions T_STAT_MEASURE_BATCH(s){ 43*4d495c6eSApple OSS Distributions gettimeofday(&time, NULL); 44*4d495c6eSApple OSS Distributions } 45*4d495c6eSApple OSS Distributions sleep(1); 46*4d495c6eSApple OSS Distributions } 47*4d495c6eSApple OSS Distributions dt_stat_finalize(s); 48*4d495c6eSApple OSS Distributions } 49*4d495c6eSApple OSS Distributions } 50