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Subject: Re: [OMPI users] open mpi on smp
From: Mark Kosmowski (mark.kosmowski_at_[hidden])
Date: 2008-04-16 12:34:13


Cally:

In the hostfile you add a "slots" line. For example on my dual
opteron (single core) system, I have slots=2. This can be read about
in more detail in the FAQ - I provide a link for this section below -
you may need to scroll down to see the example hostfile at the end of
the section.

http://www.open-mpi.org/faq/?category=running#mpirun-scheduling

Happy computing,

Mark Kosmowski

> Message: 1
> Date: Wed, 16 Apr 2008 14:32:58 +0200
> From: " Jozef K??er " <quickparser_at_[hidden]>
> Subject: Re: [OMPI users] open mpi on smp
> To: "Open MPI Users" <users_at_[hidden]>
> Message-ID:
> <8803b3d0804160532t60d9e82embeb01b83894163f3_at_[hidden]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I think that in pure OpenMPI environment (without any resorce manager) you
> should be able to run applications like this:
>
> mpirun -np 2 mpi_executable
> or
> mpirun -np 4 -machinefile machines.list mpi_executable
>
> where machines.list contains a list of your computers identified by their
> host names.
> The former command should run the program locally on 2 processors/cores, the
> latter
> one on those specified in the list.
>
> Regards,
> Jozef
>
> On Tue, Apr 15, 2008 at 6:38 PM, Cally K <kalpana0611_at_[hidden]> wrote:
>
> > hi, am beginner in openmpi
> >
> >
> > could anyone tell me how do i run programs in open mpi on smp.. as in do I
> > have to do any changes in hostfile ... like in mpich -- I write
> >
> > server:2
> >
> > how do I do it openmpi
> >
> >
> > _______________________________________________
> > users mailing list
> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
> >