From owner-freebsd-questions@FreeBSD.ORG Fri Jul 14 01:06:22 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DA90C16A4DD for ; Fri, 14 Jul 2006 01:06:22 +0000 (UTC) (envelope-from freebsd@hub.org) Received: from hub.org (hub.org [200.46.204.220]) by mx1.FreeBSD.org (Postfix) with ESMTP id 67FFF43D45 for ; Fri, 14 Jul 2006 01:06:22 +0000 (GMT) (envelope-from freebsd@hub.org) Received: from localhost (wm.hub.org [200.46.204.128]) by hub.org (Postfix) with ESMTP id 3EDED290C31; Thu, 13 Jul 2006 22:06:16 -0300 (ADT) Received: from hub.org ([200.46.204.220]) by localhost (mx1.hub.org [200.46.204.128]) (amavisd-new, port 10024) with ESMTP id 80304-06; Fri, 14 Jul 2006 01:06:21 +0000 (UTC) Received: from ganymede.hub.org (blk-224-179-167.eastlink.ca [24.224.179.167]) by hub.org (Postfix) with ESMTP id 982DA290C29; Thu, 13 Jul 2006 22:06:15 -0300 (ADT) Received: by ganymede.hub.org (Postfix, from userid 1027) id 4FA405C2A9; Thu, 13 Jul 2006 22:06:25 -0300 (ADT) Received: from localhost (localhost [127.0.0.1]) by ganymede.hub.org (Postfix) with ESMTP id 4E9943769F; Thu, 13 Jul 2006 22:06:25 -0300 (ADT) Date: Thu, 13 Jul 2006 22:06:25 -0300 (ADT) From: User Freebsd To: Jerry McAllister In-Reply-To: <200607131927.k6DJRkEj018727@clunix.cl.msu.edu> Message-ID: <20060713220454.T1799@ganymede.hub.org> References: <200607131927.k6DJRkEj018727@clunix.cl.msu.edu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: danial_thom@yahoo.com, FreeBSD Questions , "Chad Leigh -- Shire.Net LLC" Subject: SMP Performance (Was: Re: Are hardware vendors starting to bail ... ) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Jul 2006 01:06:22 -0000 On Thu, 13 Jul 2006, Jerry McAllister wrote: >> >> >> On Jul 13, 2006, at 9:22 AM, Danial Thom wrote: >> >>> Simply enabling SMP on a single processor system >>> adds 20-25% overhead in freebsd 6.1. Again, >>> readily admitted/accepted by the developers. >>> There is no way to recover that in efficiency, at >>> least not for a long time. >> >> So don't enable SMP on a single cpu system. Easy enough to avoid. >> Chad > > Why would anyone want to enable SMP on a single CPU system anyway. Actually, I believe all the new boot disks / ISOs are all SMP-enabled, so unless you build a custom kernel (some ppl do just run GENERIC ... I'm not one, mind you), you could be running an SMP-enabled kernel on a UP system without even knowing it ... ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email . scrappy@hub.org MSN . scrappy@hub.org Yahoo . yscrappy Skype: hub.org ICQ . 7615664