From owner-freebsd-smp@FreeBSD.ORG Fri Mar 28 00:42:06 2008 Return-Path: Delivered-To: freebsd-smp@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8007A1065670 for ; Fri, 28 Mar 2008 00:42:06 +0000 (UTC) (envelope-from julian@elischer.org) Received: from outJ.internet-mail-service.net (outj.internet-mail-service.net [216.240.47.233]) by mx1.freebsd.org (Postfix) with ESMTP id 677F98FC1E for ; Fri, 28 Mar 2008 00:42:06 +0000 (UTC) (envelope-from julian@elischer.org) Received: from mx0.idiom.com (HELO idiom.com) (216.240.32.160) by out.internet-mail-service.net (qpsmtpd/0.40) with ESMTP; Thu, 27 Mar 2008 22:51:13 -0700 Received: from julian-mac.elischer.org (localhost [127.0.0.1]) by idiom.com (Postfix) with ESMTP id 98D362D6500; Thu, 27 Mar 2008 17:28:17 -0700 (PDT) Message-ID: <47EC3BA1.6070808@elischer.org> Date: Thu, 27 Mar 2008 17:28:17 -0700 From: Julian Elischer User-Agent: Thunderbird 2.0.0.12 (Macintosh/20080213) MIME-Version: 1.0 To: Kris Kennaway References: <11970534.342511206657117969.JavaMail.root@dcifs4> <47EC2744.6010405@FreeBSD.org> In-Reply-To: <47EC2744.6010405@FreeBSD.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-smp@freebsd.org, Michael Stogsdill Subject: Re: SMP/HTT and Beowulf cluster on FreeBSD 7.0-RELEASE X-BeenThere: freebsd-smp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD SMP implementation group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Mar 2008 00:42:06 -0000 Kris Kennaway wrote: > Michael Stogsdill wrote: >> Hey, I have a question that I can't seem to find a decent answer to. >> The mailing lists have had some similar topics, but they were mostly >> for the 6.x-RELEASE and other minor differences. >> Heres my situation; I'm trying to create a beowulf cluster running >> FreeBSD 7.0-RELEASE consisting of 8 systems all running on Dual Xeon >> w/HTT both running at 2.8Gz. What exactly this system will be doing I >> can't say, so lets just think about the performance of the cluster >> running a benchmarking tool similar to sysbench. Because they are dual >> processor systems, I will be using the SMP kernel already, so I'm >> wondering if turning on HTT will help or hinder my Beowulf' >> performance. The cluster is not yet operational, otherwise I would do >> some tests myself! > > The answer is always "HTT performance depends on your workload. Try it > and see if it helps". new processors are not quite as bad as the original HTT processors. also, if the workload includes a mix of FP and integer work it will be worth having them on. > > Kris > _______________________________________________ > freebsd-smp@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-smp > To unsubscribe, send any mail to "freebsd-smp-unsubscribe@freebsd.org"