From chemistry-request@ccl.net Thu Jun 10 14:28:04 2004 Received: from nyssa.bchs.uh.edu (Nyssa.BCHS.uh.edu [129.7.238.204]) by server.ccl.net (8.12.8/8.12.8) with ESMTP id i5AJS1Uc024903 for ; Thu, 10 Jun 2004 14:28:01 -0500 Received: by nyssa.bchs.uh.edu (Postfix, from userid 1000) id A4B059E800B; Thu, 10 Jun 2004 14:26:26 -0400 (EDT) From: Jerry Ebalunode Reply-To: jebalunode*at*adrik.bchs.uh.edu Organization: University of Houston To: jebalunode*at*nyssa.bchs.uh.edu Subject: Re: CCL:Experiences with 64 bits AMD processors Date: Thu, 10 Jun 2004 14:26:26 -0400 User-Agent: KMail/1.6.2 References: <3EE610AC.3030300*at*klingon.uab.es> In-Reply-To: <3EE610AC.3030300*at*klingon.uab.es> MIME-Version: 1.0 Content-Disposition: inline Cc: chemistry*at*ccl.net Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200406101426.26492.jebalunode*at*uh.edu> X-Spam-Status: No, hits=0.0 required=7.5 tests=none autolearn=no version=2.61 X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on servernd.ccl.net Yes, 32 bit binaries will run on these chips, assuming that you are using and running your linux OS in 64 bit mode. The catch is that you need the following 1. a. Your 64 bit kernel should be built to support 32 codes (This is done by enabling the 32 bit emulation flag when configuring your linux 2.6 kernel b. Note amd64 is deprecated on 2.4 linux kernels 2.a. You need to install base emulation libraries for running 32bit x86 on amd64. These include the gibc in 32 bits You need to install X11R6 emulation libraries for running 32bit x86 X-window applications on amd64. 3. If you want to compile 32 binaries you need to also enable multi lib version of gcc (i.e. supports building of both 32 and 64 bit codes Pleas note that emulation does not imply that the code is slower on amd64, infact that same binary running in amd64 architecture out performs the same binary running in a 2.8 Ghz Pentium 4 linux box. These information is based on what I had to do to enable 32 bit support in my Gentoo linux box (amd64 3200+) which I built to run in 64 bit mode If you are interested in gentoo linux and in running 32 and 64 bit codes simulataneously see http://www.gentoo.org/proj/en/base/amd64/technotes.xml inOn Tuesday 10 June 2003 01:09 pm, you wrote: > Hello, > we are interested in buying some more computational resources. In our > group we are interested in 64 bit AMD processors, but we do not know > about their compatibility. They are supposed, as AMD says, to be32 bit > compatible and therefore AMD 64 bit processor should be able to run any > 32 bit application. Is that true? Any experience about this will help us > a lot. > By the way, we are running mainly gaussian jobs, and have some other 32 > bit binaries like turbomole and jaguar. We have source code license for > gaussian 03. Has anyone tried to compile Gaussian 03 for a AMD 64 bit > machine? Do 32 bit pentium binaries run correctly on a 64 bit processor? > which is the increase on the performance? Do Turbomole and Jaguar > binaries run on 64 bit AMD processors? anyone tried? > Any information will be helpful. > Thanks a lot > Marc > > --------------------------- > Marc Noguera Julian > Thcnic Especialista de Suport a la Recerca > Qummica Fisica, Universitat Autrnoma de Barcelona. > Tlf: 00-34-935812173 > Fax: 00-34-935812920 > e-mail: marc*at*klingon.uab.es > --------------------------------------- > > > -= This is automatically added to each message by the mailing script =- > To send e-mail to subscribers of CCL put the string CCL: on your Subject: > line and send your message to: CHEMISTRY*at*ccl.net > > Send your subscription/unsubscription requests to: > CHEMISTRY-REQUEST*at*ccl.net HOME Page: http://www.ccl.net | Jobs Page: > http://www.ccl.net/jobs > > If your mail is bouncing from CCL.NET domain send it to the maintainer: > Jan Labanowski, jlabanow*at*nd.edu (read about it on CCL Home Page) > -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -- Jerry Ebalunode Ph.D. Candidate RM 402F Houston Science Center Phone: 713-743-8367 Dept. of Biology and Biochemistry University of Houston 4800 Calhoun Road Houston, TX 77204