[mpich-discuss] Mixing different CPU architectures

[Pavan Balaji]

MPICH2 has a restriction on mixing different ISA's. Otherwise, different 
processor speeds, etc., should not matter much (apart from one of them 
being idle for longer during synchronization, as you pointed out). Of 
course, this is not a tested configuration, though.

  -- Pavan

On 11/17/2010 10:49 AM, Saurav Pathak wrote:
> Hi All,
>
> This is not specifically a MPICH question, but related.
>
> Is it OK to mix different CPU architectures in a set of nodes?  For
> instance, I have dual quad code (Intel E5530, 2.4 MHz, 8MB L3) system.
> Can I add a dual six core (Intel X5650, 2.66MHz, 12M L3) node to the mix
> and still use MPICH?  Would I have to compile MPICH separately for
> different architectures?  For tasks that are equally divided, the faster
> system will obviously be idle for longer.
>
> I would like to hear your experience and comments.
>
> Thanks,
> Saurav
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji