#include <iostream>

inline unsigned long getTimestamp(){
    unsigned hi,lo;
    asm ("rdtsc": "=a" (lo), "=d" (hi) );
    return ((unsigned long) lo ) | ((unsigned long) hi << 32);
}

inline unsigned long getTimestampVolatile(){
    unsigned hi,lo;
    asm volatile("rdtsc": "=a" (lo), "=d" (hi) );
    return ((unsigned long) lo )| ((unsigned long) hi << 32);
}

int main(void){
    unsigned long t1=getTimestamp();
    unsigned long t2=getTimestamp();
    std::cout << "Hello 1 -- " << t1 <<std::endl;
    std::cout << "Hello 2 -- " << t2 <<std::endl;
    std::cout << "Hello 3 -- " << getTimestamp() <<std::endl;
    std::cout << "Hello 4 -- " << getTimestamp() <<std::endl;
}