Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751913AbWAEG4s (ORCPT ); Thu, 5 Jan 2006 01:56:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752070AbWAEG4s (ORCPT ); Thu, 5 Jan 2006 01:56:48 -0500 Received: from mail24.syd.optusnet.com.au ([211.29.133.165]:22745 "EHLO mail24.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S1751913AbWAEG4r (ORCPT ); Thu, 5 Jan 2006 01:56:47 -0500 From: Con Kolivas To: ck@vds.kolivas.org Subject: Re: [ck] Re: 2.6.15-ck1 Date: Thu, 5 Jan 2006 17:55:53 +1100 User-Agent: KMail/1.9 Cc: Vojtech Pavlik , Andi Kleen , linux kernel mailing list , Arjan van de Ven References: <200601041200.03593.kernel@kolivas.org> <20060105064227.GA6120@corona.suse.cz> In-Reply-To: <20060105064227.GA6120@corona.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200601051755.54577.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1509 Lines: 35 On Thursday 05 January 2006 17:42, Vojtech Pavlik wrote: > On Thu, Jan 05, 2006 at 02:22:37AM +0100, Andi Kleen wrote: > > Arjan van de Ven writes: > > > sounds like we need some sort of profiler or benchmarker or at least a > > > tool that helps finding out which timers are regularly firing, with the > > > aim at either grouping them or trying to reduce their disturbance in > > > some form. > > > > I did one some time ago for my own noidletick patch. Can probably dig > > it out again. It just profiled which timers interrupted idle. > > > > Executive summary for my laptop: worst was the keyboard driver (it ran > > some polling driver to work around some hardware bug, but fired very > > often) , followed by the KDE desktop (should be mostly > > fixed now, I complained) and the X server and some random kernel > > drivers. > > > > I haven't checked recently if keyboard has been fixed by now. > > It's not. At this moment it's impossible to remove without significant > surgery to the driver, because it'd prevent hotplugging and many KVMs > from working. > > I can rather easily make the timer frequency variable. Would be 1 second > idle ticks OK? Sure. The lower the better, and HZ with dynticks bottoms out at 14HZ. Cheers, Con - 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/