From owner-sc22wg5@open-std.org Mon Jan 26 23:28:49 2009 Return-Path: X-Original-To: sc22wg5-dom7 Delivered-To: sc22wg5-dom7@www2.open-std.org Received: by www2.open-std.org (Postfix, from userid 521) id 24A67C178E0; Mon, 26 Jan 2009 23:28:49 +0100 (CET) X-Original-To: sc22wg5@open-std.org Delivered-To: sc22wg5@open-std.org Received: from mail1.cray.com (mail1.cray.com [136.162.0.111]) by www2.open-std.org (Postfix) with ESMTP id 001FFC178D9 for ; Mon, 26 Jan 2009 23:28:46 +0100 (CET) Received: from beaver.us.cray.com (beaver.us.cray.com [172.30.74.51]) by mail1.cray.com (8.13.6/8.13.3/gw-5323) with ESMTP id n0QMSeEB019104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 26 Jan 2009 16:28:40 -0600 (CST) Received: from CFEXFE01.us.cray.com (cfexfe01.us.cray.com [172.30.74.93]) by beaver.us.cray.com (8.13.8/8.13.3/hub-5273) with ESMTP id n0QMSWgD005098; Mon, 26 Jan 2009 16:28:32 -0600 Received: from mh-dhcp-172-31-16-180.us.cray.com ([172.31.16.180]) by CFEXFE01.us.cray.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Mon, 26 Jan 2009 16:28:32 -0600 Message-ID: <497E39C5.2030009@cray.com> Date: Mon, 26 Jan 2009 16:31:33 -0600 From: Bill Long Reply-To: longb@cray.com Organization: Cray Inc. User-Agent: Thunderbird 2.0.0.9 (Macintosh/20071031) MIME-Version: 1.0 To: fortran standards email list for J3 Cc: MPI-3 Fortran working group , WG5 Subject: Re: (j3.2006) (SC22WG5.3896) [MPI3 Fortran] [ukfortran] [MPI3 Fortran] MPI non-blocking transfers References: <49776DF7.1040900@cray.com> <20090121211748.130A5C178D9@www2.open-std.org> <20090121224014.6CB63C178D9@www2.open-std.org> <20090121234200.4F3BDCA3434@www2.open-std.org> <20090122000407.D5A8ECA3434@www2.open-std.org> <20090122100652.C31E9CA3434@www2.open-std.org> <4978A8A0.8090407@cray.com> <20090122192735.C6453CA5FE6@www2.open-std.org> In-Reply-To: <20090122192735.C6453CA5FE6@www2.open-std.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 26 Jan 2009 22:28:32.0753 (UTC) FILETIME=[6BBD4E10:01C98005] X-Cray-VirusStatus: clean Sender: owner-sc22wg5@open-std.org Precedence: bulk N.M. Maclaren wrote: > >> (The other is that it incorrectly suggests that MPI calls >> have something to do with I/O which is not the case (except for the >> actual MPI I/O calls).) >> > > As Aleks has told you, that is wrong. Stream I/O to a FIFO is a form > of I/O, and MPI point-to-point transfers and simply a form of that. > That has been accepted, and all forms of such message passing referred > to as I/O, since before any of us started computing. > > Yes, but this is a concept from the days when MPI-like transfers actually used the system's I/O hardware. Today that is increasing archaic and misleading. Times change, and we should be willing to change with them. A good place to start is getting rid of outdated terminology. It helps people think more clearly about what is going on. [BTW, when I started computing the only I/O was cards, line printers, paper tape, magnetic tape, and disks.] Cheers, Bill -- Bill Long longb@cray.com Fortran Technical Support & voice: 651-605-9024 Bioinformatics Software Development fax: 651-605-9142 Cray Inc., 1340 Mendota Heights Rd., Mendota Heights, MN, 55120