[Beowulf] SCore MPI on quad core

Dave Love d.love at liverpool.ac.uk
Tue Sep 23 12:48:28 EDT 2008


Has anyone tried -- or, better, succeeded with -- SCore MPI on quad core
systems, specifically Barcelonas?  It worked fine before they were
upgraded from 2×2 Opteron cores to 2×4, but now it's performing much
worse than other MPIs (with gig ethernet).  I'm not sure exactly what
the measurements involved until someone comes back from holiday or I
find the notes, but it's bad enough that we're only running 4-core jobs
currently.  (We have commercial support, but...)

Thanks for any info or ideas.

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