Newsgroups: comp.parallel.mpi From: Martin Schuster Subject: blocking nonblocking Organization: Lehrstuhl fuer Hydraulische Maschinen und Anlagen Date: Wed, 10 Jun 1998 06:24:24 +0100 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <357E1888.41C6@lhm.mw.tu-muenchen.de> Hello there, just recently switched from PVM to MPI getting a little bit confused... Here's my problem: For the exchange of boudary conditions performing parallel CFD computations, n processes should communicate without data loss or gridlocking in the follwing way 1 Perform computation send computed bounaries to m desiganted processes do check, if there's a message if yes receive it and update boundary if no continue loop until m boundaries are exchanged goto 1 <-> oooo <-> i/O <-> o o <-> <-> oooo <-> Sounds like non blocking communication, ha? Did work quite properly using PVM. Unfortunalty I don't get it implementing MPI. Any hints on this toppic, like demo programms or literature sources ? Thanx Martin -- ----------------------------------------------------------------------- Martin F. Schuster, Dipl.-Ing. Technische Universitaet Muenchen Lehrstuhl fuer Hydraulische Maschinen und Anlagen phone: (49) 089 289 16306 fax: (49) 089 289 16297 email: schuster@lhm.mw.tu-muenchen.de www: http://www.lhm.mw.tu-muenchen.de/~martin -------------------------------------------- "earth is a beta site" ---