From owner-freebsd-hackers@FreeBSD.ORG Fri May 5 13:10:50 2006 Return-Path: X-Original-To: freebsd-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 8DED216A402 for ; Fri, 5 May 2006 13:10:50 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh2.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2BE6943D46 for ; Fri, 5 May 2006 13:10:49 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh2.centtech.com (8.13.1/8.13.1) with ESMTP id k45DAmag092548; Fri, 5 May 2006 08:10:48 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <445B4ED9.6020607@centtech.com> Date: Fri, 05 May 2006 08:10:49 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5 (X11/20060402) MIME-Version: 1.0 To: Attila Nagy References: <445AB56F.8090907@centtech.com> <445AC174.5050102@pacific.net.sg> <445AC46F.30702@centtech.com> <445AD048.80305@pacific.net.sg> <445AD1AC.1070902@centtech.com> <445AD300.1020808@pacific.net.sg> <445AD50B.2060107@centtech.com> <445AD6B4.7050407@pacific.net.sg> <445AD83A.7090607@samsco.org> <445B4D2D.8070502@fsn.hu> In-Reply-To: <445B4D2D.8070502@fsn.hu> Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1445/Fri May 5 03:30:03 2006 on mh2.centtech.com X-Virus-Status: Clean Cc: freebsd-hackers@freebsd.org, Scott Long Subject: Re: Core Duo - only one cpu being used 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, 05 May 2006 13:10:50 -0000 Attila Nagy wrote: > Hello, > > On 05/05/06 06:44, Scott Long wrote: >> CPU1 is being treated as a hyperthreading core instead of a real core, >> and is being disabled per our policy on Intel hyperthreading. By >> 'disabled' I mean that it is started, but it is being excluded from >> scheduling decisions, and thus is only running its idle proc. It's >> also handling any interrupts that come to it, such as timer and IPI >> interrupts, so it's at 99% instead of 100% for the idle proc. There >> is nothing broken about the number you are seeing, your system is >> just running under a scheduling policy that it should not be. >> >> This should have been fixed a week or so ago by a commit to HEAD, >> RELENG_6, and RELENG_6_1 by Colin Percival. How old is kernel? > Isn't this fixed by jkim's commit? > > I don't have any Core Duos here, but on a Xeon LV (Sossaman) with > CURRENT, everything is OK: > http://www.freebsd.org/cgi/query-pr.cgi?pr=96203 > > BTW, just set machdep.hyperthreading_allowed=1 until the fix arrives. > I can confirm now that it is fixed in todays 6-STABLE. Thanks everyone! Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------