Write a C program to measure time spent in context switch in Linux OS

Question

Can we write a c program to find out time spent in context switch in Linux? Could you please share code if you have one? Thanks

Answer 1

Why not just this one as rough estimation?

#include 
#include 
#include 
#include 

int main(int argc, char **argv) {
        struct timeval tv, tvt;
        int diff;
        gettimeofday(&tv, 0);
        diff = tvt.tv_usec - tv.tv_usec;
        if (fork() != 0) {
                gettimeofday(&tvt, 0);
                diff = tvt.tv_usec - tv.tv_usec;
                printf("%d\n", diff);
        }
        return 0;
}

Note: Actually we shouldn't put null as the second argument, check man gettimeofday. Also, we should check if tvt.tv_usec > tv.tv_usec! Just a draft.