#include #include #include #include #include struct timespec t_start, t_end; #define start_timing() clock_gettime(CLOCK_MONOTONIC, &t_start) #define end_timing() clock_gettime(CLOCK_MONOTONIC, &t_end) double get_timing(void){ uint64_t diff = (t_end.tv_sec*1000000000 + t_end.tv_nsec) - (t_start.tv_sec*1000000000 + t_start.tv_nsec); return diff/1000000000.0; } uint64_t c_start, c_end; #define start_clock() c_start = __rdtsc() #define end_clock() c_end = __rdtsc() #define clock_cycles (c_end-c_start) int main(){ start_timing(); end_timing(); struct timespec res; clock_getres(CLOCK_MONOTONIC, &res); printf("%d.%08ld\n", res.tv_sec, res.tv_nsec); return 0; }