From: treumann@XXXXXXXXXX
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To: mpi-core@XXXXXXXXXXX
cc: William Gropp <gropp@XXXXXXXXXXX>
Date: Fri, 18 Jun 1999 11:23:20 -0400
Subject: Re: MPI_PROC_NULL as target rank in RMA
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I agree MPI_PROC_NULL should be allowed.  I would identify the MPI-2 statement
that target rank is a non-negative integer as a trivial inconsistency with
MPI-1 saying integer for source/destination ranks.  That is, it does not intend
to rule out MPI_PROC_NULL.

Dick Treumann                IBM RS/6000 SP Development
Tele (914) 433-7846         Fax (914) 433-8363



William Gropp <gropp@XXXXXXXXXXX> on 06/17/99 02:04:44 PM
To:   mpi-core@XXXXXXXXXXX
cc:    (bcc: Richard Treumann/Poughkeepsie/IBM)
Subject:  MPI_PROC_NULL as target rank in RMA





Is it invalid to use MPI_PROC_NULL as the target rank in MPI_Put, MPI_Get,
and MPI_Accumulate?  I can make the case both for and against this, based
on the text in the standard.  It would match the spirit of the standard
(which says that MPI_PUT is like a send at the origin and a receive at the
target) to allow MPI_PROC_NULL.

Bill