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Subject: [OMPI users] Multicast?
From: Brock Palen (brockp_at_[hidden])
Date: 2008-12-09 21:49:13


Is OpenMPI using Multicast for things like MPI_Bcast() ?

Some simple tests of really old versions (1.0.2) showed binary tree
type performance, while latter versions gave me the same run time no
matter how many CPU's I used.

Thus this lead me to believe that something like multicast is in
use. Is it?

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985