From owner-freebsd-performance@FreeBSD.ORG Wed Apr 30 05:57:14 2003 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9649C37B401 for ; Wed, 30 Apr 2003 05:57:14 -0700 (PDT) Received: from otter3.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id B071B43FCB for ; Wed, 30 Apr 2003 05:57:13 -0700 (PDT) (envelope-from anderson@centtech.com) Received: from centtech.com (electron.centtech.com [204.177.173.173]) by otter3.centtech.com (8.12.3/8.12.3) with ESMTP id h3UCvB56078882; Wed, 30 Apr 2003 07:57:11 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <3EAFC81D.4070808@centtech.com> Date: Wed, 30 Apr 2003 07:57:01 -0500 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; Linux i386; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: agent dero References: <3045.172.178.229.216.1051706735.squirrel@bluhayz.homeunix.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-performance@freebsd.org Subject: Re: FBSD 5 & SMP X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Apr 2003 12:57:15 -0000 agent dero wrote: > I was reading the FBSD 5.0 release notes, and how the new version has > better support for multiple processors. I haven't been able to find any a > 4.x-STABLE SMP support docs. Does this mean that 4.7, my current release, > doesn't support the multiple processors well. I am rebuilding my small > business' server, and trying to decide if a dual processor will be the > better way to go, but not sure if the advantages are going to be huge with > the. I read the previous message about WITH_THREADS as a ports option, but > the ports maximizing the dual CPUs isn't my greatest, I need the kernel > itself to maximize the CPUs. Is this possible under any of the stable > releases, before 5.0 ?? Yes, FreeBSD versions prior to 5.0 have SMP support, however 5.0's support is more "finely tuned" and will give you better results. However, since this sounds like a production server, you may want to stick with 4.8-RELEASE, and built a new kernel with SMP support. Depending on what you are using the machine for, you may or may not see a performance benefit of a dual processor machine. What's the machine's primary function? Eric -- ------------------------------------------------------------------ Eric Anderson Systems Administrator Centaur Technology Attitudes are contagious, is yours worth catching? ------------------------------------------------------------------