Newsgroups: comp.parallel.pvm From: Alan Thompson Subject: Re: Non-blocking send in PVM ? Organization: Schlumberger Date: Wed, 11 Jun 1997 08:36:17 +0100 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <339E5571.41C6@abingdon.geoquest.slb.com> vruiz@filabres.ualm.es wrote: > > Hi, > > is possible to make a non blocking pvm_send(), like in MPI ? > Is this possible on a workstation network ? As far as I was aware all pvm_send commands are non-blocking i.e. they can complete the send before a matching receive has been posted. This is possible because as I understand it Pvm first receives messages into a some kind of system buffer on the receiveing machine before it receives it into user space. Its very easy to prove this for your self. create an application with two processes have each send a message to the other then each receive from the other. If the send is blocking the application will dead lock if not the applicayion will complete. Also I belive that Pvm-send is more or less analogous to MPI_ISEND regards alan -- Alan Thompson Schlumberger GeoQuest Telephone: +44 1235 559595 ext 2113 FAX : +44 1235 535565 email athompson@abingdon.geoquest.slb.com