From owner-sc22wg5@open-std.org  Thu Jun 25 20:39:33 2009
Return-Path: <owner-sc22wg5@open-std.org>
X-Original-To: sc22wg5-dom7
Delivered-To: sc22wg5-dom7@www2.open-std.org
Received: by www2.open-std.org (Postfix, from userid 521)
	id 98728C76BCE; Thu, 25 Jun 2009 20:39:33 +0200 (CET DST)
X-Original-To: sc22wg5@open-std.org
Delivered-To: sc22wg5@open-std.org
Received: from mail.jpl.nasa.gov (sentrion2.jpl.nasa.gov [128.149.139.106])
	by www2.open-std.org (Postfix) with ESMTP id 27D28C76BC8
	for <sc22wg5@open-std.org>; Thu, 25 Jun 2009 20:39:07 +0200 (CET DST)
Received: from mprox1.jpl.nasa.gov (mprox1.jpl.nasa.gov [137.78.160.140])
	by mail.jpl.nasa.gov (Switch-3.3.3mp/Switch-3.3.2mp) with ESMTP id n5PId6Q5020166
	for <sc22wg5@open-std.org>; Thu, 25 Jun 2009 18:39:06 GMT
Received: from [137.79.7.57] (math.jpl.nasa.gov [137.79.7.57])
	(authenticated bits=0)
	by mprox1.jpl.nasa.gov (Switch-3.2.6/Switch-3.2.6) with ESMTP id n5PId4D7012034
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT)
	for <sc22wg5@open-std.org>; Thu, 25 Jun 2009 11:39:05 -0700
Subject: Re: (j3.2006) (SC22WG5.4037) [ukfortran]      LOCK/UNLOCK question
From: Van Snyder <Van.Snyder@jpl.nasa.gov>
Reply-To: Van.Snyder@jpl.nasa.gov
To: sc22wg5 <sc22wg5@open-std.org>
In-Reply-To: <20090625090959.D761CC4596C@www2.open-std.org>
References: <4A38A3BB.9090208@nag-j.co.jp><4A38B917.8080202@llnl.gov>
	 <4A391682.8060208@cray.com>
	 <061720091627.18164.4A39196C000C05A4000046F422230703729B0A02D29B9B0EBF02019C050C079D0B020A08D2050C070B@att.net>
	 <4A3930E3.8070505@cray.com>
	 <061720091851.25112.4A393B4100015BA20000621822228869349B0A02D29B9B0EBF02019C050C079D0B020A08D2050C070B@att.net>
	 <4A397E50.9010406@nag-j.co.jp>
	 <Prayer.1.3.1.0906221229130.26720@hermes-2.csi.cam.ac.uk>
	 <4A3F9897.8010103@llnl.gov>	<4A3FA25D.1050507@cray.com>
	 <4A3FF921.9070703@llnl.gov>	<20090622221248.1FEF4C178E5@www2.open-std.org>
	 <20090623084602.88A3EC178E5@www2.open-std.org>
	 <20090624020300.8EE77C178E5@www2.open-std.org>
	 <20090625033421.31AAEC3BB09@www2.open-std.org>
	 <20090625051920.8B235C3BB09@www2.open-std.org>
	 <20090625090959.D761CC4596C@www2.open-std.org>
Content-Type: text/plain
Organization: Yes
Date: Thu, 25 Jun 2009 11:39:04 -0700
Message-Id: <1245955144.5080.1098.camel@math.jpl.nasa.gov>
Mime-Version: 1.0
X-Mailer: Evolution 2.12.3 (2.12.3-8.el5_2.3) 
Content-Transfer-Encoding: 7bit
X-Source-IP: math.jpl.nasa.gov [137.79.7.57]
X-Source-Sender: Van.Snyder@jpl.nasa.gov
X-AUTH: Authorized
Sender: owner-sc22wg5@open-std.org
Precedence: bulk


On Thu, 2009-06-25 at 02:09 -0700, Malcolm Cohen wrote:
> 
> > Certainly no one is requiring them to reprogram basic parallelism
> from 
> > scratch.  Indeed, most of them will want to migrate their current
> MPI 
> > programs to use coarrays incrementally.
> That's far easier than the task of writing a parallel program from
> scratch.
> > Maybe they are all "experts".
> If they have a working parallel program with MPI, probably pretty
> close.

A pretty big "if."  More likely, instead of a "working parallel program"
they have a program that almost always gets believable answers, and
hardly ever goes into deadlock.