Fork() system call time?


 
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# 1  
Old 03-26-2006
Fork() system call time?

One more question. How can i calculate the time that system needs to make fork() system call? I need to make it with times function but i really don't know how. Smilie
# 2  
Old 03-26-2006
use the gettimeofday function - before and after the fork call.

You need to realize in a multiprocessing environment that the observed elapsed time of a fork call (from the parent's persepctive) may also involve all of the time the subprocess uses before exiting and then returning to the parent.
# 3  
Old 03-26-2006
In case you meant from the command shell - just write a simple program that forks - based on a command argument, then compare. like this:
Code:
int main(int argc, char *argv[])
{
    pid_t pid=0;
    if (argc>1) pid=fork();
    if (pid!=0) wait(NULL);
    exit(0);
    return 0;
}

then compare times:
Code:
times myprog 1
times myprog

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