beowulf performance with MPI

Greg Lindahl glindahl at
Sat Jun 24 14:36:38 PDT 2000

> I compared the profiling of the two simulations and it appears that
> much of the time savings came from a significantly faster MPI_ALLGATHERV,

... which is one of the small number of functions in mpich that could use a
rewrite. For a fairly small mount of effort, collective operations can be
much faster.

-- g

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