From owner-freebsd-amd64@FreeBSD.ORG Tue Aug 2 17:59:39 2005 Return-Path: X-Original-To: freebsd-amd64@freebsd.org 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 8290316A41F for ; Tue, 2 Aug 2005 17:59:39 +0000 (GMT) (envelope-from ray@redshift.com) Received: from outgoing.redshift.com (outgoing.redshift.com [207.177.231.8]) by mx1.FreeBSD.org (Postfix) with ESMTP id A80D343D46 for ; Tue, 2 Aug 2005 17:59:38 +0000 (GMT) (envelope-from ray@redshift.com) Received: from workstation (216-228-19-21.dsl.redshift.com [216.228.19.21]) by outgoing.redshift.com (Postfix) with SMTP id 57E1E9791D; Tue, 2 Aug 2005 10:59:38 -0700 (PDT) Message-Id: <3.0.1.32.20050802105941.00a547c8@pop.redshift.com> X-Mailer: na X-Sender: redshift.com Date: Tue, 02 Aug 2005 10:59:41 -0700 To: freebsd-amd64@freebsd.org From: ray@redshift.com In-Reply-To: <20050802174922.GI71672@dragon.NUXI.org> References: <3.0.1.32.20050729020609.00a6a240@pop.redshift.com> <3.0.1.32.20050728013152.00a4d188@pop.redshift.com> <3.0.1.32.20050728013152.00a4d188@pop.redshift.com> <3.0.1.32.20050729020609.00a6a240@pop.redshift.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Martin Cracauer , freebsd-amd64@freebsd.org Subject: Re: Benchmarks: AMD64 vs i386 on Dual 246 Opteron X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Aug 2005 17:59:39 -0000 At 10:49 AM 8/2/2005 -0700, David O'Brien wrote: | On Fri, Jul 29, 2005 at 02:06:09AM -0700, ray@redshift.com wrote: | > In going over my notes, the only thing I | > can see that might have been a mistake was if I left out 'options SMP' | > from the AMD64 kernel config file. But I seem to recall you do not | > have to include that on AMD64 like you do with i386 - can anyone | > confirm this? | | Totally false! A kernel w/o 'options SMP' is a UP kernel and only uses a | single CPU. I suspect is what you are mis-remembering is that an AMD64 | SMP kernel will boot and work just fine on a UP AMD64 machine. (which | hasn't been the case on i386 in the past) | | -- | -- David (obrien@FreeBSD.org) Thanks David - needless to say, I'm going to be re-running all my benchmarks :-D I can't remember if I left out the SMP line on the AMD kernel config or if I was thinking about the "device apic" line that is not needed. I was operating on about 2 hours of sleep and rushing to finish my benchmarks before the evaluation server had to be picked up by UPS. I'll post my results when I have another machine in here and re-run the exact same benchmarks. This time I will be certain to confirm the situation on the SMP kernel with regard to the AMD64 branch. Ray