Newsgroups: comp.parallel.mpi From: Lars Rzymianowicz Subject: Re: Several ISENDs on the same buffer? Organization: Dept. of Computer Science, University of Mannheim, Germany Date: Wed, 27 May 1998 08:25:32 +0200 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <356BB1DC.5D85DF1C@mufasa.informatik.uni-mannheim.de> Jonathan Eckstein wrote: > My question: does posting another ISEND of the exact same buffer to a > different processor count as "access"? I would like to send the same > buffer asynchronously to several other processors. I know I could either > (1) Make multiple copies of the buffer > (2) Wait for the completion of one ISEND to start the next. The natural solution would be a new group communicator and a broadcast to all group members, i think... Of course, this will be not asynchronous. Otherwise, i would prefer (2) above (1), since the asynch Send will return almost immediately, so you can do them quick in a loop. Lars -- email: lr@mufasa.informatik.uni-mannheim.de Homepage: http://mufasa.informatik.uni-mannheim.de/lsra/persons/lars/