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Subject: Re: [OMPI users] How do I run OpenMPI safely on a Nehalem standalone machine?
From: Gus Correa (gus_at_[hidden])
Date: 2010-05-06 14:10:40


Hi Jeff

Thank you for your testimony.

So now I have two important data points (you and Douglas Guptill)
to support the argument here that installing Fedora
on machines meant to do scientific and parallel computation
is to ask for trouble.

I use CentOS in our cluster, but this is a standalone machine
I don't have control of.

Anybody out there using Open MPI + Fedora Core + Nehalem ?
Happy?

Regards,
Gus Correa

Jeff Squyres wrote:
> On May 6, 2010, at 1:11 PM, Gus Correa wrote:
>
>> Just for the record, I am using:
>> Open MPI 1.4.2 (released 2 days ago), gcc 4.4.3 (g++, gfortran).
>> All on Fedora Core 12, kernel 2.6.32.11-99.fc12.x86_64 #1 SMP.
>
> Someone asked earlier in this thread -- I've used RHEL4.4 and RHEL5.4 on my Nehalem EP boxen. I used the default gcc on those RHELs for compiling everything (OMPI + apps). I don't remember what it was on RHEL 4.4, but on RHEL 5.4, it's GCC 4.1.2.
>
>> You and Jeff reported that your
>> Nehalems get along with Open MPI.
>> I would guess other people have functional Open MPI + Nehalem systems.
>> All I can think of is that some mess with the OS/gcc is causing
>> the trouble here.
>
> I don't have much experience with kernels outside
of the RHEL kernels,
so I don't know if 2.6.32 is problematic or not. :-(
>