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Subject: Re: [OMPI users] A simple mpi code hangs at MPI_Init?
From: Sang Chul Choi (goshng_at_[hidden])
Date: 2008-05-12 13:51:27


Hi,

I think that ubuntu's package version might have some problem. I just
downloaded source code from open mpi and it just worked after source
installation.

Thank you,

Sang Chul

P.S. The code was as follows. I ran it with $ mpirun -n 2 hello

===============================================================================
#include <stdio.h>
#include <mpi.h>

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

  int myrank, size;

  fprintf (stderr, "Before MPI_Init\n");
  MPI_Init (&argc, &argv); /* Initialize MPI */
  MPI_Comm_rank (MPI_COMM_WORLD, &myrank); /* Get my rank */
  MPI_Comm_size (MPI_COMM_WORLD, &size); /* Get the total
                                                   number of processors */
  fprintf (stderr, "MPI_Comm_size\n");
  printf ("Processor %d of %d: Hello World!\n", myrank, size);

  MPI_Finalize (); /* Terminate MPI */

  return 0;
}
===============================================================================

On Wed, May 7, 2008 at 5:48 PM, Barry Rountree <rountree_at_[hidden]> wrote:
> On Wed, May 07, 2008 at 03:47:24PM -0400, Sang Chul Choi wrote:
> > Hi,
> >
> > I tried to run a hello world example of mpi code. It just hangs at
> > MPI_Init. My machine is installed with Ubuntu linux and I install some
> > package of open mpi. Compiling was okay, but running the code hangs at
> > MPI_Init. Is there any specific things that I should do before running
> > mpi code such as "mpd" setup?
> >
> > I will appreciate any help.
>
> Could you post the code and how you're executing it?
>
>
> >
> > Thank you,
> >
> > Sang Chul
> >
> > --
> > ===============================
> > Live, Learn, and Love!
> > Sang Chul is at Piscataway.
> > Work: +1-732-445-2681
> > ===============================
>
>
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> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
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