step1.c

#include <stdio.h>
#include <stdint.h>

union ticks
{
    uint64_t t64;
    struct s32
    {
        uint32_t th,tl;
    } t32;
};


void step1(int LSpy) {
    union ticks start, end;

    int long unsigned i;
    int a = 1;
    int long unsigned liter = 10000;
    uint64_t max_result = 0;

    for (i = 0; i < liter * 10; ++i) {
        if ((i % LSpy) == 0) {
            a = 0;
        }
    }

    uint64_t result = 0;
    for (i = 0; i < liter; ++i) {
        asm("rdtsc\n\t":"=a"(start.t32.th),"=d"(start.t32.tl));

        if ((i % LSpy) == 0) {
            a = 0;
            asm("rdtsc\n\t":"=a"(end.t32.th),"=d"(end.t32.tl));
            result = end.t64-start.t64;
        }
        else a=1;
    }
    printf("%d %lu\n", LSpy, result);

}

int main() {
    int testsAmount = 512;
    for (int i = 1; i <= testsAmount; ++i) {
        step1(i);
    }
    return 0;
}