1*e3723e1fSApple OSS Distributions #include <stdio.h> 2*e3723e1fSApple OSS Distributions #include <stdlib.h> 3*e3723e1fSApple OSS Distributions #include <unistd.h> 4*e3723e1fSApple OSS Distributions #include <sys/stat.h> 5*e3723e1fSApple OSS Distributions #include <mach/mach_time.h> 6*e3723e1fSApple OSS Distributions #include <sys/time.h> 7*e3723e1fSApple OSS Distributions 8*e3723e1fSApple OSS Distributions #include <darwintest.h> 9*e3723e1fSApple OSS Distributions #include <darwintest_perf.h> 10*e3723e1fSApple OSS Distributions 11*e3723e1fSApple OSS Distributions T_GLOBAL_META(T_META_TAG_PERF); 12*e3723e1fSApple OSS Distributions 13*e3723e1fSApple OSS Distributions T_DECL(gettimeofday_tl, "gettimeofday performance in tight loop", T_META_TAG_VM_NOT_ELIGIBLE) { 14*e3723e1fSApple OSS Distributions { 15*e3723e1fSApple OSS Distributions struct timeval time; 16*e3723e1fSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("gettimeofday tight loop"); T_STAT_MEASURE_LOOP(s)17*e3723e1fSApple OSS Distributions T_STAT_MEASURE_LOOP(s){ 18*e3723e1fSApple OSS Distributions gettimeofday(&time, NULL); 19*e3723e1fSApple OSS Distributions } 20*e3723e1fSApple OSS Distributions dt_stat_finalize(s); 21*e3723e1fSApple OSS Distributions } 22*e3723e1fSApple OSS Distributions } 23*e3723e1fSApple OSS Distributions 24*e3723e1fSApple OSS Distributions extern int __gettimeofday(struct timeval *, struct timezone *); 25*e3723e1fSApple OSS Distributions T_DECL(__gettimeofday_tl, "__gettimeofday performance in tight loop", T_META_TAG_VM_NOT_ELIGIBLE) { 26*e3723e1fSApple OSS Distributions { 27*e3723e1fSApple OSS Distributions struct timeval time; 28*e3723e1fSApple OSS Distributions 29*e3723e1fSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("__gettimeofday tight loop"); T_STAT_MEASURE_LOOP(s)30*e3723e1fSApple OSS Distributions T_STAT_MEASURE_LOOP(s){ 31*e3723e1fSApple OSS Distributions __gettimeofday(&time, NULL); 32*e3723e1fSApple OSS Distributions } 33*e3723e1fSApple OSS Distributions dt_stat_finalize(s); 34*e3723e1fSApple OSS Distributions } 35*e3723e1fSApple OSS Distributions } 36*e3723e1fSApple OSS Distributions 37*e3723e1fSApple OSS Distributions T_DECL(gettimeofday_sl, "gettimeofday performance in loop with sleep", T_META_TAG_VM_NOT_ELIGIBLE) { 38*e3723e1fSApple OSS Distributions { 39*e3723e1fSApple OSS Distributions struct timeval time; 40*e3723e1fSApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("gettimeofday loop with sleep"); 41*e3723e1fSApple OSS Distributions while (!dt_stat_stable(s)) { T_STAT_MEASURE_BATCH(s)42*e3723e1fSApple OSS Distributions T_STAT_MEASURE_BATCH(s){ 43*e3723e1fSApple OSS Distributions gettimeofday(&time, NULL); 44*e3723e1fSApple OSS Distributions } 45*e3723e1fSApple OSS Distributions sleep(1); 46*e3723e1fSApple OSS Distributions } 47*e3723e1fSApple OSS Distributions dt_stat_finalize(s); 48*e3723e1fSApple OSS Distributions } 49*e3723e1fSApple OSS Distributions } 50