From owner-chemistry {*at*} ccl.net Thu May 18 05:43:00 2006 From: "Marcel Drabbels Marcel.Drabbels-*-epfl.ch" To: CCL Subject: CCL:G: Running Two jobs on a shared memory computer Message-Id: <-31773-060518052851-30189-bp19kU4CXFImbhAxlK1Mmw*|*server.ccl.net> X-Original-From: Marcel Drabbels Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="iso-8859-1"; format=flowed Date: Thu, 18 May 2006 10:28:41 +0200 Mime-Version: 1.0 Sent to CCL by: Marcel Drabbels [Marcel.Drabbels###epfl.ch] Dear Roger, This sounds very much like the problem we recently encountered with Gaussian when we tried to run it on our dual opteron system running SUSE 9.3. Most of the time jobs making use of two processors crashed. The people at Gaussian suggested that this might be caused by a bug in the older LINUX kernels that caused a race condition. We recently updated our kernel to version 2.6.16. And indeed the problems have disappeared. Marcel, At 17-05-06 13:09, you wrote: >Sent to CCL by: Roger Kevin Robinson [r.robinson|,|imperial.ac.uk] >Hi, > > I have several shared processor opterons. At the moment I can not >run guassian on two shared memory processors with out it crashing. > >If I try to run two jobs separately the both end up running on the same >processor. > >Is there any way to get both jobs to run on separate processors. > >Thanks Roger==================================================================== Dr. Marcel Drabbels Laboratoire de Chimie Physique Moléculaire (LCPM) École Polytechnique Fédérale de Lausanne (EPFL) Station 6 CH-1015 Lausanne Switzerland Tel: +41-21-693 3022/6131 Fax: +41-21-693 5170 http://lcpm.epfl.ch/ ====================================================================