rdtsc.c

#include <stdio.h>
#include <stdint.h>
 
 
uint64_t rdtsc(void)
{
	uint64_t ret;
	__asm__ volatile("rdtsc" : "=A"(ret));
	return ret;
}
 
int main(void)
{
	printf("clock conut = 0x%llx\n", rdtsc());
	return 0;
}