[Pw_forum] Quad-processor

[Axel Kohlmeyer]

On Fri, 23 Nov 2007, Salvador Meza Aguilar wrote:

SMA> PW forum
SMA> 
SMA> Somebody knows if the PWscf works on Quad-Processor?

yes. why not? you have to use MPI and you can run 
as many MPI threads as you want per node.

SMA> I think it is possible to run on double processor quad-core, like a 8
SMA> processors.

yes. also this is possible. but you have to expect that the
total performance, may be severly limited by the memory bandwidth
unless you are running _very_ small calculations.

it may be faster to only use half of the cores, though 
and benefit from the larger cache per core. please see
the recent discussion on the topic in the mailing list 
archives.

cheers,
   axel.

SMA> 
SMA> Could you informe me about this.
SMA> 
SMA> Thank you
SMA> 
SMA> Salvador Meza Aguilar
SMA> _______________________________________________
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SMA> Pw_forum at pwscf.org
SMA> http://www.democritos.it/mailman/listinfo/pw_forum
SMA> 

-- 
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Axel Kohlmeyer   akohlmey at cmm.chem.upenn.edu   http://www.cmm.upenn.edu
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