1*43a90889SApple OSS Distributions #ifdef T_NAMESPACE 2*43a90889SApple OSS Distributions #undef T_NAMESPACE 3*43a90889SApple OSS Distributions #endif 4*43a90889SApple OSS Distributions #include <darwintest.h> 5*43a90889SApple OSS Distributions 6*43a90889SApple OSS Distributions #include <spawn.h> 7*43a90889SApple OSS Distributions #include <stdlib.h> 8*43a90889SApple OSS Distributions #include <unistd.h> 9*43a90889SApple OSS Distributions 10*43a90889SApple OSS Distributions T_GLOBAL_META( 11*43a90889SApple OSS Distributions T_META_NAMESPACE("xnu.perf"), 12*43a90889SApple OSS Distributions T_META_CHECK_LEAKS(false), 13*43a90889SApple OSS Distributions T_META_TAG_PERF 14*43a90889SApple OSS Distributions ); 15*43a90889SApple OSS Distributions 16*43a90889SApple OSS Distributions #define SPAWN_MEASURE_LOOP(s) \ 17*43a90889SApple OSS Distributions char *args[] = {"/usr/bin/true", NULL}; \ 18*43a90889SApple OSS Distributions int err; \ 19*43a90889SApple OSS Distributions pid_t pid; \ 20*43a90889SApple OSS Distributions int status; \ 21*43a90889SApple OSS Distributions while (!dt_stat_stable(s)) { \ 22*43a90889SApple OSS Distributions T_STAT_MEASURE(s) { \ 23*43a90889SApple OSS Distributions err = posix_spawn(&pid, args[0], NULL, NULL, args, NULL); \ 24*43a90889SApple OSS Distributions } \ 25*43a90889SApple OSS Distributions if (err) { \ 26*43a90889SApple OSS Distributions T_FAIL("posix_spawn returned %d", err); \ 27*43a90889SApple OSS Distributions } \ 28*43a90889SApple OSS Distributions waitpid(pid, &status, 0); \ 29*43a90889SApple OSS Distributions if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { \ 30*43a90889SApple OSS Distributions T_FAIL("Child process of posix_spawn failed to run"); \ 31*43a90889SApple OSS Distributions } \ 32*43a90889SApple OSS Distributions } 33*43a90889SApple OSS Distributions 34*43a90889SApple OSS Distributions T_DECL(posix_spawn_platform_binary_latency, "posix_spawn platform binary latency", T_META_TAG_VM_NOT_ELIGIBLE) { 35*43a90889SApple OSS Distributions { 36*43a90889SApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("time"); 37*43a90889SApple OSS Distributions SPAWN_MEASURE_LOOP(s); 38*43a90889SApple OSS Distributions dt_stat_finalize(s); 39*43a90889SApple OSS Distributions } 40*43a90889SApple OSS Distributions 41*43a90889SApple OSS Distributions { 42*43a90889SApple OSS Distributions dt_stat_thread_cpu_time_t s = dt_stat_thread_cpu_time_create("on_cpu_time"); 43*43a90889SApple OSS Distributions SPAWN_MEASURE_LOOP(s); 44*43a90889SApple OSS Distributions dt_stat_finalize(s); 45*43a90889SApple OSS Distributions } 46*43a90889SApple OSS Distributions } 47*43a90889SApple OSS Distributions 48*43a90889SApple OSS Distributions #define FORK_MEASURE_LOOP(s) \ 49*43a90889SApple OSS Distributions pid_t pid; \ 50*43a90889SApple OSS Distributions int status; \ 51*43a90889SApple OSS Distributions while (!dt_stat_stable(s)) { \ 52*43a90889SApple OSS Distributions T_STAT_MEASURE(s) { \ 53*43a90889SApple OSS Distributions pid = fork(); \ 54*43a90889SApple OSS Distributions if (pid == 0) \ 55*43a90889SApple OSS Distributions exit(0); \ 56*43a90889SApple OSS Distributions else if (pid == -1) \ 57*43a90889SApple OSS Distributions T_FAIL("fork returned -1"); \ 58*43a90889SApple OSS Distributions } \ 59*43a90889SApple OSS Distributions waitpid(pid, &status, 0); \ 60*43a90889SApple OSS Distributions if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { \ 61*43a90889SApple OSS Distributions T_FAIL("forked process failed to exit properly"); \ 62*43a90889SApple OSS Distributions } \ 63*43a90889SApple OSS Distributions } 64*43a90889SApple OSS Distributions 65*43a90889SApple OSS Distributions T_DECL(fork, "fork latency", T_META_TAG_VM_NOT_ELIGIBLE) { 66*43a90889SApple OSS Distributions { 67*43a90889SApple OSS Distributions dt_stat_time_t s = dt_stat_time_create("time"); 68*43a90889SApple OSS Distributions FORK_MEASURE_LOOP(s); 69*43a90889SApple OSS Distributions dt_stat_finalize(s); 70*43a90889SApple OSS Distributions } 71*43a90889SApple OSS Distributions { 72*43a90889SApple OSS Distributions dt_stat_thread_cpu_time_t s = dt_stat_thread_cpu_time_create("on_cpu_time"); 73*43a90889SApple OSS Distributions FORK_MEASURE_LOOP(s); 74*43a90889SApple OSS Distributions dt_stat_finalize(s); 75*43a90889SApple OSS Distributions } 76*43a90889SApple OSS Distributions } 77