From owner-freebsd-smp@FreeBSD.ORG Tue Nov 8 17:47:50 2005 Return-Path: X-Original-To: freebsd-smp@freebsd.org Delivered-To: freebsd-smp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D752816A41F for ; Tue, 8 Nov 2005 17:47:50 +0000 (GMT) (envelope-from david@landgren.net) Received: from smtp9.wanadoo.fr (smtp9.wanadoo.fr [193.252.22.22]) by mx1.FreeBSD.org (Postfix) with ESMTP id 27B8943D4C for ; Tue, 8 Nov 2005 17:47:49 +0000 (GMT) (envelope-from david@landgren.net) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf0906.wanadoo.fr (SMTP Server) with ESMTP id 289941C001B4 for ; Tue, 8 Nov 2005 18:47:48 +0100 (CET) Received: from [10.11.12.1] (ASt-Lambert-151-1-63-52.w83-199.abo.wanadoo.fr [83.199.125.52]) by mwinf0906.wanadoo.fr (SMTP Server) with ESMTP id F1F731C001BA for ; Tue, 8 Nov 2005 18:47:47 +0100 (CET) X-ME-UUID: 20051108174747991.F1F731C001BA@mwinf0906.wanadoo.fr Message-ID: <4370E4C3.5000204@landgren.net> Date: Tue, 08 Nov 2005 18:47:47 +0100 From: David Landgren Organization: The Dusty Decadent Delights of Imperial Pompeii User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.7.8) Gecko/20050511 X-Accept-Language: en-us, en, fr-fr MIME-Version: 1.0 To: freebsd-smp@freebsd.org References: <01d301c5e3ae$b2461840$b3db87d4@multiplay.co.uk> <20051107152718.GA4743@tara.freenix.org> <10EFEEF4-D1D4-45FC-991C-60A4E60FB391@bnc.net> <20051108164520.GA81940@xor.obsecurity.org> In-Reply-To: <20051108164520.GA81940@xor.obsecurity.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Multi CPU support in 6.0 X-BeenThere: freebsd-smp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD SMP implementation group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Nov 2005 17:47:51 -0000 And Kris Kennaway did write: > On Mon, Nov 07, 2005 at 05:15:55PM +0100, Achim Patzner wrote: > >>Am 07.11.2005 um 16:27 schrieb Ollivier Robert: >> [...] >>I remember someone writing that the intermediate state of -CURRENT >>while removing the giant lock around the kernel wasn't viable with >>more than four CPUs as it would completely deadlock from time to >>time. I guess we're a bit further down the road... > > > That certainly seems to be the case. You want to use FreeBSD 6.0, > which has excellent performance and stability on SMP in my testing, > even with 14 CPUs. FreeBSD 5.4 is definitely not up to it, since VFS > is under Giant. Well I'm going to take the plunge and bring an HP Netserver LT 6000 with 6 CPUs up from 5.4-STABLE to 6. Are there any obvious additions or subtractions from a 5.x kernel configuration file? Is ADAPTIVE_GIANT now obsolete? Thanks for the tips, David