Newsgroups: comp.parallel.mpi
From: stoclet@ccr.jussieu.fr (Patrick STOCLET)
Subject: barrier problem within a  routine
Organization: CCR - Universites Paris VI/VII - Paris - France
Date: 5 Nov 1997 18:53:32 +0100
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Message-ID: <63qbqs$3sh4@moka.ccr.jussieu.fr>


hello,this must be an easy one 

i call a routine with only a restricted number of nodes 

i must use barriers inside the routine 

do i have to create inside my routine  a new group, a new  communicator and 
do my barrier only with my new communicator 
or is there some simple elegant way to do it 

the number of nodes calling the routine can change 


thanks for hints 

patrick stoclet