Converting jiffies to milli seconds

Question

How do I manually convert jiffies to milliseconds and vice versa in Linux? I know kernel 2.6 has a function for this, but I\'m working on 2.4 (homework) and though I looked

Answer 1

I found this sample code on kernelnewbies. Make sure you link with -lrt

#include 
#include 
#include 

int main()
{
    struct timespec res;
    double resolution;

    printf("UserHZ   %ld\n", sysconf(_SC_CLK_TCK));

    clock_getres(CLOCK_REALTIME, &res);
    resolution = res.tv_sec + (((double)res.tv_nsec)/1.0e9);

    printf("SystemHZ %ld\n", (unsigned long)(1/resolution + 0.5));
    return 0;
 }