Newsgroups: comp.parallel.mpi
From: phmsl@zeus.bris.ac.uk ()
Subject: Non-blocking sends
Organization: University of Bristol, England
Date: Mon, 14 Jul 1997 15:12:01 GMT
Message-ID: <EDBE82.JDp@fsa.bris.ac.uk>

I am currently trying to port some fortran 90 code onto a Cray T3D using MPI
for my message passing.  My question is about MPI itself, as I find the
standard to be vague.

When is it safe to alter a variable that has been sent using either a
non-blocking synchronous send, or a non-blocking buffered send?  For the
buffered send, can the variable be modified right away, and then sent again
(as a second and slightly different message)?

Thanks,

Marc Lavine
marc.lavine@bris.ac.uk