[Beowulf] Re: Performance degrading

Reuti reuti at staff.uni-marburg.de
Tue Dec 22 20:39:32 EST 2009


Hi,

Am 23.12.2009 um 01:35 schrieb Gus Correa:

> <snip>
> Likewise, browsing through the GA stuff I could find no direct  
> reference
> to OpenMPI, only to MPICH,
> although theoretically MPI is supposed to be a standard,
> and portable programs ans libraries should work right with any MPI  
> flavor (in practice I am not so sure this is true).

GA can be used with Open MPI. I just did this for Molpro. Side note:  
Molpro supports now also a pure MPI-2 compilation besides the former  
via TCGMSG over MPI. The TCGMSG-MPI version is faster than the plain  
MPI-2 compilation. Okay, one extra step, and you get the time back.

-- Reuti
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