Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261252AbVCKTNk (ORCPT ); Fri, 11 Mar 2005 14:13:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261344AbVCKTMo (ORCPT ); Fri, 11 Mar 2005 14:12:44 -0500 Received: from ns1.lanforge.com ([66.165.47.210]:13227 "EHLO www.lanforge.com") by vger.kernel.org with ESMTP id S261434AbVCKTKV (ORCPT ); Fri, 11 Mar 2005 14:10:21 -0500 Message-ID: <4231ED18.2050804@candelatech.com> Date: Fri, 11 Mar 2005 11:10:16 -0800 From: Ben Greear Organization: Candela Technologies User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.7.3) Gecko/20041020 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Christian Schmid CC: Andrew Morton , nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org Subject: Re: BUG: Slowdown on 3000 socket-machines tracked down References: <4229E805.3050105@rapidforum.com> <422BAAC6.6040705@candelatech.com> <422BB548.1020906@rapidforum.com> <422BC303.9060907@candelatech.com> <422BE33D.5080904@yahoo.com.au> <422C1D57.9040708@candelatech.com> <422C1EC0.8050106@yahoo.com.au> <422D468C.7060900@candelatech.com> <422DD5A3.7060202@rapidforum.com> <422F8A8A.8010606@candelatech.com> <422F8C58.4000809@rapidforum.com> <422F9259.2010003@candelatech.com> <422F93CE.3060403@rapidforum.com> <20050309211730.24b4fc93.akpm@osdl.org> <4231B95B.6020209@rapidforum.com> In-Reply-To: <4231B95B.6020209@rapidforum.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1085 Lines: 29 Christian Schmid wrote: > OHGAWD I GOT IT!!!!!!!! > > I admit, totally coincidentially but its really FIXED. Today I went to > the puter scanning the servers by routine and wondered why the bandwidth > is at 100% without any holes. > > The only thing I have done is I switched off hyper-threading because the > server is at only 20% CPU anyway so I just disabled it. > > So its something with linux dealing with hyper-threading. YAY :) For what it's worth, I was running dual-xeon systems with HT turned on. But, I have a single process, single-threaded application, so there is not much scheduling to be done. If you have a large number of threads or processes, then it would make more sense for turning off HT to have an affect. Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/