Hello everyone,
I was dabbling with OpenMPI and decided to have a little fun by
modding a piece of sample code.
#include <stdio.h>
#include <mpi.h>
void main (int argc, char *argv[])
{
int myrank, size,x;
MPI_Init(&argc, &argv); /* Initialize MPI */
for(x = 0; x < 10; x++){
if(fork() > 0){
MPI_Comm_rank(MPI_COMM_WORLD, &myrank); /* Get my rank
*/
MPI_Comm_size(MPI_COMM_WORLD, &size); /* Get the total number
of
processors */
printf("Processor %d of %d: Running!\n", myrank, size);
}
}
MPI_Finalize(); /* Terminate MPI */
}
This code looks harmless at first glance, but turns out it is idiotic,
however it took me a full on hour to figure out why.
Anyone wanna guess whats wrong?
Oh and yeah, don't try to compile this one at home. :)
/*
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*/
