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From: Greg Lindahl (greg.lindahl_at_[hidden])
Date: 2006-11-08 13:48:59


On Wed, Nov 08, 2006 at 09:57:18AM -0500, Hugh Merz wrote:

> The conventional wisdom of pure MPI being as good as hybrid models
> is primarily driven by the fact that people haven't had much incentive
> to re-write their algorithms to support both models.

Actually, I was thinking of apps where people spent lots of money to
add hybrid models to their code, and found it didn't win much. But
it's hard for reality to catch up with a bad religion.

> If current HPC trends continue into the future there is going to be
> increased motivation to implement fine-grained parallelism in
> addition to MPI.

And to make MPI do finger grain parallelism, too... which is why
InfiniPath IB HCAs do so well on small messages.

-- greg