From owner-freebsd-hackers@FreeBSD.ORG Sun Sep 26 00:53:26 2004 Return-Path: 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 DE4AD16A4CE for ; Sun, 26 Sep 2004 00:53:26 +0000 (GMT) Received: from santiago.pacific.net.sg (santiago.pacific.net.sg [203.120.90.135]) by mx1.FreeBSD.org (Postfix) with SMTP id DE99F43D53 for ; Sun, 26 Sep 2004 00:53:25 +0000 (GMT) (envelope-from oceanare@pacific.net.sg) Received: (qmail 7522 invoked from network); 26 Sep 2004 00:53:24 -0000 Received: from unknown (HELO maxwell2.pacific.net.sg) (203.120.90.192) by santiago with SMTP; 26 Sep 2004 00:53:24 -0000 Received: from [192.168.0.107] ([210.24.202.141]) by maxwell2.pacific.net.sg with ESMTP <20040926005324.FOFJ27058.maxwell2.pacific.net.sg@[192.168.0.107]>; Sun, 26 Sep 2004 08:53:24 +0800 Message-ID: <415612EC.9010805@pacific.net.sg> Date: Sun, 26 Sep 2004 08:53:00 +0800 From: Erich Dollansky User-Agent: Mozilla Thunderbird 0.7.3 (X11/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 To: jromero@save-ferris.com References: <18553.192.168.2.11.1096151640.squirrel@192.168.2.11> In-Reply-To: <18553.192.168.2.11.1096151640.squirrel@192.168.2.11> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-hackers@freebsd.org Subject: Re: SMP on quad xeons X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Sep 2004 00:53:27 -0000 Hi, jromero@save-ferris.com wrote: > Posted to freebsd-smp but didn't get too many replies, so I apologize for I am on that list too but I can't remember your posting. > cross posting ahead of time. Need to configure groupware server and > multiprotocol wireless proxy for aproximatly 2500 accounts. Application > is heavily multi threaded and willrequire alot of CPU power. The OS will > be FreeBSD 5.x Thinking of going with ServerWorks* Grand Champion HE quad > xeon server board. Has anyone had any SMP experience with quad xeon I read on the list several times that FreeBSD has problems when 6 or more CPUs are in a box. You could be affected by this if HTT is enabled. There is currently a lot of development around the new scheduler (ULE) which will be usable very soon. Check the mailing list to find out more. Another thing. Did you consider Opterons? Tyan has a board with four of them. You would not be affected by the 6-8 CPU 'problem'. > systems on freebsd 5.x??? I'm curious to know if anyone experienced > any major technical stumbling blocks. I guess I also want to know how > well Freebsd 5.x will scale on a 4 proc. Will freeBSD 5.x utilize > a quad xeon board as efficiently as linux2.6 system ?? > I cannot tell as I never used Linux. I run FreeBSD on a Dual-Athlon with the old scheduler (BSD). My experience is that this scheduler is not as good as the one you find on Solaris or HP-UX. This is also the reason why the new one was developed. Erich