From owner-freebsd-stable@FreeBSD.ORG Wed Dec 28 20:25:44 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E1D8916A41F; Wed, 28 Dec 2005 20:25:44 +0000 (GMT) (envelope-from petefrench@ticketswitch.com) Received: from mail.ticketswitch.com (mail.ticketswitch.com [194.200.93.188]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5CD7143D53; Wed, 28 Dec 2005 20:25:44 +0000 (GMT) (envelope-from petefrench@ticketswitch.com) Received: from [172.16.1.6] (helo=dilbert.firstcallgroup.co.uk) by mail.ticketswitch.com with esmtp (Exim 4.52 (FreeBSD)) id 1Erhri-000FM0-UN; Wed, 28 Dec 2005 20:25:42 +0000 Received: from petefrench by dilbert.firstcallgroup.co.uk with local (Exim 4.52 (FreeBSD)) id 1Erhri-000Bgg-P9; Wed, 28 Dec 2005 20:25:42 +0000 To: freebsd-stable@freebsd.org, marko@freebsd.org In-Reply-To: <43B2F0A8.2030609@freebsd.org> Message-Id: From: Pete French Date: Wed, 28 Dec 2005 20:25:42 +0000 Cc: Subject: Re: RELENG_6: Which scheduler for SMP? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Dec 2005 20:25:45 -0000 > What I am trying to decide is whether there any point in making the jump > from a very stable RELENG_5 system to RELENG_6. AIUI the ULE scheduler > and it's associated options optimize the use of multiple CPUs and by > staying with 4BSD I'm not getting the best performance from my system. I'm not using ULE either - but I got a 15 percent speedup out of our SMP systems when moving from RELENG_5 to 6.0-RELEASE. Definitely worth doing in my opinion and am now upgrading all the production systems to 6.0 > Can anyone offer any advice on this please? Yes, do it. Its a definite improvement. -pcf.