From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751492AbVLGSGe (ORCPT ); Wed, 7 Dec 2005 13:06:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751569AbVLGSGd (ORCPT ); Wed, 7 Dec 2005 13:06:33 -0500 Received: from tim.rpsys.net ([194.106.48.114]:28115 "EHLO tim.rpsys.net") by vger.kernel.org with ESMTP id S1751492AbVLGSGd (ORCPT ); Wed, 7 Dec 2005 13:06:33 -0500 Subject: Sluggish machine under 2.6.14 and 2.6.15-rc5 From: Richard Purdie To: LKML Content-Type: text/plain Date: Wed, 07 Dec 2005 18:06:26 +0000 Message-Id: <1133978786.8096.52.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I've recently acquired some new hardware which I'd image to be fairly standard - 3.0Ghz P4 (630?) HT CPU (800Mhz FSB), Gigabyte 8I945P-G motherboard, 1GB memory. I installed ubuntu and their 2.6.12-smp based kernel was fine but didn't support all my hardware (this board has some ip8212 ide ports). I therefore installed 2.6.15-rc5 which ran badly and made the machine slow and sluggish. 2.6.14 shows the same speed issue. 2.6.13 runs just as well as 2.6.12 does. I'm using smp kernels to try and take advantage of hyperthreading. By slow and sluggish, I mean that the machine is generally lacking in processing power and is also unresponsive to user interaction. Under 2.6.12/2.6.13 compared to 2.6.14/15-rc5: * kernel compiles are at least twice as fast * desktop menus are much more responsive * bringing up dialogs e.g. to "Log Off" happens much faster * machine boots up much faster The .configs and config differences: http://www.rpsys.net/openzaurus/temp/desktop/config-2.6.13 http://www.rpsys.net/openzaurus/temp/desktop/config-2.6.14 http://www.rpsys.net/openzaurus/temp/desktop/config.diff dmesg and differences: http://www.rpsys.net/openzaurus/temp/desktop/dmesg-2.6.13 http://www.rpsys.net/openzaurus/temp/desktop/dmesg-2.6.14 http://www.rpsys.net/openzaurus/temp/desktop/dmesg.diff dmesg.diff is probably the most interesting. Is there a known reason I'd see so much speed difference between these kernels? Is there something simple I'm missing here? Sadly, the later kernels are basically unusable. I'd like to avoid a binary search but if that's the next step... Richard