Wednesday, 20 February 2008

CPU Timing in a C code

Examine this simple example :



#include < stdio.h >
#include < stdlib.h >
#include < time.h >
#include < math.h >

int main();

int main() {
long int i,a;
clock_t cputime,cputime1;
double timing,timing0;
cputime= clock();
for(i=0;i<10000000;i++){
a=pow(4,2);
a=pow(4,2);
a=pow(4,2);
a=pow(4,2);
a=pow(4,2);
}

cputime1= clock();
timing0=((double) cputime1-cputime);
timing=((double) cputime1-cputime) / CLOCKS_PER_SEC;
printf("timing =%12.9f clock per sec=%d timing0=%12.9f\n",
timing,CLOCKS_PER_SEC,timing0);
exit(0);
}

No comments:

(c) Copyright 2008-2015 Mehmet Suzen (suzen at acm dot org)

Creative Commons Licence
This work is licensed under a Creative Commons Attribution 3.0 Unported License.