1 #include <stdint.h>
2 #include <stdio.h>
3
4 uint64_t rdtsc(){
5     uint32_t lo,hi;
6     __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
7     return ((uint64_t)hi << 32) | lo;
8 }
9
10 int main() {
11     for (int i = 0; i < 100; i++) {
12         uint64_t a = rdtsc();
13         printf("%lu ticks\n", rdtsc() - a);
14     }
15     return 0;
16 }
17
1	#include <stdint.h>
2	#include <stdio.h>
3
4	uint64_t rdtsc(){
5	uint32_t lo,hi;
6	__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
7	return ((uint64_t)hi << 32) \| lo;
8	}
9
10	int main() {
11	for (int i = 0; i < 100; i++) {
12	uint64_t a = rdtsc();
13	printf("%lu ticks\n", rdtsc() - a);
14	}
15	return 0;
16	}
17