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Subject: Re: [OMPI users] Duplicate independent processes
From: Ralph Castain (rhc_at_[hidden])
Date: 2011-01-05 20:09:02


I'm afraid I don't understand your example - are you saying you provide "-np 1" and get two processes instead of 1?

If so, would you please provide info on the type of system where this happens? I've never seen it with mpich or ompi

On Jan 5, 2011, at 4:57 PM, Kristian Medri wrote:

> Any hints on what to look for to get the second machine to behave without
> duplicate independent processes?
>
> "mpirun -np 2 ..."
>
> Provides as expected:
>
> "Using MPI version 2.1, 2 processes
> .1.
> .2."
>
> While on another similar machine:
>
> "Using MPI version 2.2, 1 processes
> .1.
> Using MPI version 2.2, 1 processes
> .1.
> .2.
> .2."
>
> On both:
>
> /usr/lib64/openmpi/1.4-gcc/bin/mpirun --version
>
> Returns:
>
> mpirun (Open MPI) 1.4
>
> I looked in the FAQ and searched the list but did not find it yet. When I
> worked with MPICH2 I also had this happen from time to time. I can provide
> additional information should it not be as common here.
>
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