Newsgroups: comp.parallel.mpi
From: paullu@sys.toronto.edu (Paul Lu)
Subject: Q:  Performance of collective communications?
Organization: Computer Science, University of Toronto
Date: 24 Sep 96 17:52:27 GMT
Message-ID: <1996Sep24.135226.27112@jarvis.cs.toronto.edu>


Hello:

I'm wondering if there are any (recent?) papers discussing
the performance for collective communications in different
MPI implementations.  Currently, I'm using MPICH and I'm
particularly interested in functions for, say, broadcast
(exploiting broadcast mediums, say), gather, scatter, etc.

These functions exist in the interface with the hope that they can be
optimized in implementations, so I'm wondering how much of that hope
has been realized.

A look at the MPI web pages at MS State and ANL and David Walker's
bibliography of papers didn't turn up much.

Any pointers would be appreciated.  Thanks in advance.

	...Paul

