[OMPI users] MPI_Finalize() maintains load at 100%.

[Iván Cores González]

Hi all,
I have a performance problem with the next code. 

int main( int argc, char *argv[] )
{
        MPI_Init(&argc, &argv);

        int myid;
        MPI_Comm_rank(MPI_COMM_WORLD, &myid);

        //Imagine some important job here, but P0 ends first.
        if (myid != 0)
        {       
                sleep(20);
        }

        printf("Calling MPI_Finalize() ...\n");
        // Process 0 maintain core load at 100%.
        MPI_Finalize();
        printf("Ok\n");

        return 0;
}

If some MPI threads call MPI_Finalize() while others threads are still 
"working", the MPI_Finalize() function maintains the core load in 100% 
and not allows other threads or jobs in the processor to run faster.

Any idea to avoid the load or force the P0 to sleep?

Thanks,
Ivan Cores.