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Subject: Re: [OMPI users] mpirun takes only single processor instead of multiple processors
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-02-13 08:07:08


Can you send all the information listed here:

     http://www.open-mpi.org/community/help/

On Feb 12, 2009, at 8:48 PM, Ramya Narasimhan wrote:

> Hi,
> I have entered the IP address of the system in the hosts
> file (twice the IP for two CPU's) .I don't know about this mca
> parameter. Can you please tell me about this or any reference
> material for this parameter? Actually the input file is to perform
> minimization of the protein using CHARMM program. It is not giving
> any error message as which rank stopped. The output shows that the
> first charmm stops and the job runs on the other which is fully
> completed.
> When I tried to check for the CPU's it actually encounts, I gave the
> command in charmm and it replied only one CPU. Is there anything
> wrong in the way of adding CPU's?
> Thanks for help
> Varsha.
>
> On Fri, Feb 13, 2009 at 9:49 AM, Ralph Castain <rhc_at_[hidden]> wrote:
> Could you pass along what is in your hosts file? Did you set any mca
> params in the default mca parameter file, or in your environ?
>
> I note that you redirected stdin. Which rank is running and which is
> stopped? How big is your input file? I am not familiar with your
> program - are both ranks expecting to get stdin, or only rank=0?
>
> Thanks
> Ralph
>
>
>
> On Feb 12, 2009, at 9:12 PM, Ramya Narasimhan wrote:
>
> Hi All,
> I am a new user of Open MPI. I have installed open mpi-1.3
> on a RedHat Linux-5 ver system with F77 set as gfortran compiler. I
> tested the programs in examples and all ran. When I tried the CHARMM
> program with mpirun (2 CPU's) the job runs on single processor and
> it is stopped in the other. Actually I clarified that the error is
> not with CHARMM. Is there any error in my MPI procedure? I gave the
> job run as
>
> mpirun -hostfile hosts -np 2 charmm < *.inp
> Thanks for any help.
> Varsha.
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-- 
Jeff Squyres
Cisco Systems