From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935492AbYBNBOD (ORCPT ); Wed, 13 Feb 2008 20:14:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935217AbYBNBMf (ORCPT ); Wed, 13 Feb 2008 20:12:35 -0500 Received: from simmts12-qfe0.srvr.bell.ca ([206.47.199.141]:63543 "EHLO simmts12-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935173AbYBNBMc (ORCPT ); Wed, 13 Feb 2008 20:12:32 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAALYjs0eOonh+/2dsb2JhbAAIihKHeZwn Message-ID: <47B39577.3020603@gmail.com> Date: Wed, 13 Feb 2008 21:12:23 -0400 From: Kevin Winchester User-Agent: Thunderbird 2.0.0.9 (X11/20071229) MIME-Version: 1.0 To: Ingo Molnar CC: Linux Kernel Mailing List Subject: Latency issues with x86.git X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ingo, I have encountered (a handful of times in the past few months) some real interactivity problems on my system. Moving the mouse or typing a key on the keyboard takes around a second to show any response. Once I perform a reboot, the problem is gone again. I am currently running x86.git mm branch, but I switch between that branch, mainline git, and mm kernels, so I cannot guarantee on which trees I have or have not seen the problem. It seems to have started around the time that CFS came into being, but it might be something completely unrelated. When it happened this evening, I ran the cfs-debug-info.sh script to which you had referred me in another thread. I'm not sure if this helps to debug the problem, but it was all I could think to try. I have LatencyTOP in my kernel, so I guess I could try the userspace tool as well the next time. The output of the script is at: http://personal.nbnet.nb.ca/kwin/cfs-debug-info-2008.02.13-20.56.38 Unfortunately, I cannot reproduce the problem intentionally - it only happens once a month or so. If there is any other info you need, please let me know, or any suggestions for what to try the next time. Thanks, -- Kevin Winchester