Sorry, I'm sure making a silly mistake, but did not work out.
I'm compiling a simple mpi hello world:
#include <stdio.h>
#include <mpi.h>
int main (argc, argv)
int argc;
char *argv[];
{
int rank, size;
MPI_Init (&argc, &argv); /* starts MPI */
MPI_Comm_rank (MPI_COMM_WORLD, &rank); /* get current process id */
MPI_Comm_size (MPI_COMM_WORLD, &size); /* get number of processes */
printf( "Hello world from process %d of %d\n", rank, size );
MPI_Finalize();
return 0;
}
And:
> mpicc -o hello_world_c hello_world.c
> mpirun -np 4 hello_world_c
But returns:
Hello world from process 0 of 1
Hello world from process 0 of 1
Hello world from process 0 of 1
Hello world from process 0 of 1
But my computer is a core i7 with 4 cores. And everything seems to be ok, ie. cat /proc/cpuinfo shows the 4 processors
what's happening??? Thanks in advance!!!!
There is nothing wrong with your code. The only problem that can be is with your mpi installation.
Notice:
There is a differences between processor to core. its not the same thing.