From owner-freebsd-hackers@FreeBSD.ORG Fri Dec 16 15:40:24 2005 Return-Path: X-Original-To: hackers@FreeBSD.ORG Delivered-To: freebsd-hackers@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 68C2E16A41F for ; Fri, 16 Dec 2005 15:40:24 +0000 (GMT) (envelope-from cracauer@schlepper.zs64.net) Received: from schlepper.zs64.net (schlepper.zs64.net [212.12.50.230]) by mx1.FreeBSD.org (Postfix) with ESMTP id C88FF43D55 for ; Fri, 16 Dec 2005 15:40:23 +0000 (GMT) (envelope-from cracauer@schlepper.zs64.net) Received: from schlepper.zs64.net (schlepper [212.12.50.230]) by schlepper.zs64.net (8.13.3/8.12.9) with ESMTP id jBGFeMC4021135; Fri, 16 Dec 2005 16:40:22 +0100 (CET) (envelope-from cracauer@schlepper.zs64.net) Received: (from cracauer@localhost) by schlepper.zs64.net (8.13.3/8.12.9/Submit) id jBGFeMdb021134; Fri, 16 Dec 2005 10:40:22 -0500 (EST) (envelope-from cracauer) Date: Fri, 16 Dec 2005 10:40:22 -0500 From: Martin Cracauer To: Scott Long Message-ID: <20051216104022.A20877@cons.org> References: <43A26FFB.9080405@samsco.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <43A26FFB.9080405@samsco.org>; from scottl@samsco.org on Fri, Dec 16, 2005 at 12:42:51AM -0700 Cc: hackers@FreeBSD.ORG Subject: Re: My wish list for 6.1 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Dec 2005 15:40:24 -0000 Scott Long wrote on Fri, Dec 16, 2005 at 12:42:51AM -0700: > > 2. SMP kernels for install. Right now we only install a UP kernel, for > performance reasons. We should be able to package both a UP and SMP > kernel into the release bits, and have sysinstall install both. It > should also select the correct one for the target system and make that > the default on boot. If people are concerned about performance, I benchmarked a 6-beta kernel SMP versus UP on a socket 939 Opteron. The performance characteristic for the parallel tests with CPU-eaters and plain http streams in the background is different. But there certainly is no slowdown that would make us look bad when people use a SMP kernel on a one-processor machine. CPU time results: http://www.cons.org/cracauer/crabench/smpkernel.user.html Wall clock time results: http://www.cons.org/cracauer/crabench/smpkernel.wall.html General benchmark homepage (lots of AMD64 and memory benchmarking there): http://cracauer-forum.cons.org/forum/crabench.html Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer http://www.cons.org/cracauer/ FreeBSD - where you want to go, today. http://www.freebsd.org/