Newsgroups: comp.parallel.mpi
From: salo@mrjones.engr.sgi.com (Eric Salo)
Subject: Re: Performance problems using mpi on the SGI Power Challenge
Organization: Silicon Graphics, Inc.  Mountain View, CA
Date: 13 Oct 1996 00:43:58 GMT
Message-ID: <53pe0e$629@murrow.corp.sgi.com>

> I am working on my own implementation of MPI on the SGI Power
> Challenge.  My approach is to continue to use gang scheduling, but to
> allow processes to cooperate in data transfer.  Our initial tests show
> that this works well in most circumstances.  Any data transfers over a
> constant (MY_MPI_WORK_UNIT :)) are split up into chunks (size of
> chunks dependes on the number of available spinning processors) and
> placed in the work queues of any spinning processors.

I don't see how this could work unless your implementation was multi-
threaded. Is it? And are you ready to publish any hard numbers yet? It
sounds interesting...

Eric Salo         Silicon Graphics Inc.             "Do you know what the
(415)933-2998     2011 N. Shoreline Blvd, 8U-802     last Xon said, just
salo@sgi.com      Mountain View, CA   94043-1389     before he died?"

