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October 2010

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Subject:
Re: AMD Magny-Cours
From:
Steven Timm <[log in to unmask]>
Reply To:
Steven Timm <[log in to unmask]>
Date:
Thu, 21 Oct 2010 14:54:06 -0500
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When Fermilab did our HW evaluation earlier this year we had
Magny-Cours based machines, 12 core processors, available.  It did
work but I don't know what if any tunes were done.

Steve


On Thu, 21 Oct 2010, Esztermann, Ansgar wrote:

> Hi everyone,
>
> can someone tell me what the support status of Magny-Cours is?
> In upstream's release notes and knowledgebase, I have found some obscure (to me) notes stating that there is some support with 5.4, 2.6.18-164.9, some more with 5.5, and still more with 6.
> Currently, we have a bunch of 6168-based 4-core machines here, and while they are quite stable with 5.4 and kernel 2.6.18-164.11.1, performance of our main hpc application is abysmal. It is 48-way multithreaded and yields hardly even half the expected performance; what is more, performance is varying from run to run by something like +/- 30%.
>
>
> Thanks,
>
> A.
>

-- 
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
[log in to unmask]  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Assistant Group Leader.

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