Fork() system call time?

Applications Programming
1

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. :frowning:

2

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

In case you meant from the command shell - just write a simple program that forks - based on a command argument, then compare. like this:

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:

times myprog 1
times myprog