#include #include #include #include #include #include static double cpufrequency = 0; static void init(void) { long result = 0; size_t resultlen = sizeof(long); sysctlbyname("machdep.tsc_freq",&result,&resultlen,0,0); cpufrequency = result; } long long cpucycles_clockmonotonic(void) { double result; struct timespec t; if (!cpufrequency) init(); clock_gettime(CLOCK_MONOTONIC,&t); result = t.tv_nsec; result *= 0.000000001; result += (double) t.tv_sec; result *= cpufrequency; return result; } long long cpucycles_clockmonotonic_persecond(void) { if (!cpufrequency) init(); return cpufrequency; }