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Subject: Re: [OMPI users] run OpenMPI job on heterogeneous processor
From: Ralph Castain (rhc_at_[hidden])
Date: 2008-08-20 12:53:40

First, I trust that you built Open MPI to support heterogeneous
operations? I'm not sure what version you are using, but it may well
have done it by default.

Second, there is an error on your cmd line that is causing the
problem. It should read:

mpirun -np 1 -host b1 foo_x86 : -np 1 -host b2 foo_ppc

The way you wrote it, foo_x86 will run anywhere it wants (which would
default to whatever node you were on when you executed this), while
foo_ppc will run on both hosts b1 and b2 (which means the first rank
will always go on b1).

Hope that helps

On Aug 20, 2008, at 10:02 AM, Mi Yan wrote:

> I have one MPI job consisting of two parts. One is "foo_x86", the
> other is "foo_ppc", and there is MPI communication between "foo_x86"
> and "foo_ppc".
> "foo_x86" is built on X86 box "b1", "foo_pcc" is built on PPC box
> "b2". Anyone can tell me how to start this MPI job?
> I tried "mpirun -np 1 foo_x86 : -np 1 foo_ppc -H b1,b2"
> I tried the above command on "b1", the X86 box, and I got "foo_ppc:
> Exec Format error"
> I tired on "b2", the PPC box, and I got "foo_x86: Exec format error"
> Anybody has a clue? Thanks in advance.
> Mi Yan
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