can any one help me about calculating the exact execution time of processor

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hi,

Can any one help me about clock problem..i need to calculate the exact execution time of algorithm using the processor clock speed not the wall clock time..i am getting zero by using the clock_t function in time.h.also how can i calculate the exact processor speed execution of program..reply me as soon as possible.

C Syntax (Toggle Plain Text)
for example
#include<stdio.h>
#include<time.h>
int main()
{
clock_t start,end;
start=clock();
bubblesort(array,arraysize);
end=clock();
printf("the clock speed: %f",start-end);
getch();
 
}
for example
#include<stdio.h>
#include<time.h>
int main()
{
clock_t start,end;
start=clock();
bubblesort(array,arraysize);
end=clock();
printf("the clock speed: %f",start-end);
getch();

}

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eswar.aspire

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Nov 15th, 2009

Re: can any one help me about calculating the exact execution time of processor

your code: " printf("the clock speed: %f",start-end); "

Hey dude, change to: end - start to obtain time in miliseconds
or (end - start) / 1000.0 for time in seconds.miliseconds

(and don't forget to declare double start, end; )

Last edited by AuSsIeStOnE; Nov 15th, 2009 at 8:36 pm.

AuSsIeStOnE

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