From owner-freebsd-amd64@FreeBSD.ORG Sat Jan 22 00:09:28 2005 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B0A3116A4CE for ; Sat, 22 Jan 2005 00:09:28 +0000 (GMT) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1FE2843D54 for ; Sat, 22 Jan 2005 00:09:28 +0000 (GMT) (envelope-from scottl@freebsd.org) Received: from [192.168.254.12] (g4.samsco.home [192.168.254.12]) (authenticated bits=0) by pooker.samsco.org (8.12.11/8.12.10) with ESMTP id j0M0DxCk042080; Fri, 21 Jan 2005 17:13:59 -0700 (MST) (envelope-from scottl@freebsd.org) Message-ID: <41F199B3.1030809@freebsd.org> Date: Fri, 21 Jan 2005 17:09:23 -0700 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Steve Kargl References: <41F1903D.3060508@celeritystorm.com> <20050121235550.GA85260@troutmask.apl.washington.edu> In-Reply-To: <20050121235550.GA85260@troutmask.apl.washington.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=0.0 required=3.8 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on pooker.samsco.org cc: freebsd-amd64@freebsd.org Subject: Re: Would this system work correctly with FreeBSD 5.3 ? X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Jan 2005 00:09:28 -0000 Steve Kargl wrote: > On Fri, Jan 21, 2005 at 11:29:01PM +0000, Hugo Silva wrote: > >>I'm buying a Quad AMD Opteron 64 bits, with 4GB memory. I'd like to know >>if FreeBSD 5.3 will support a quad-cpu system (with HTT, 8) correctly, >>without performance losses and consistent operation, no crashes etc. Is >>the 4GB memory still a problem in amd64 ? > > > You're asking a possibly bad question. > > First, FreeBSD 5.3 will run on a quad opteron system. The tyan > quad motherboard supports upto 32 GB on memory, and FreeBSD 5.3 > should/will use all 32 GB. So, your 4 GB is no problem. > 4GB+ is a problem on 5.3-RELEASE due to DMA issues. Only a small handful of storage drivers will actually work. > Second, HTT may or may not cause a small impact on performance. > It depends on what applications you run. Of course, my opteron > processes don't support HTT > Of course there is no such a thing as an HTT Opteron system. In any case, there have been fixes recently that help with a potential lockup on systems with lots of CPU's. It's not yet ideal, but even more fixes are in the pipeline. Scott