From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262400AbVHDPH0 (ORCPT ); Thu, 4 Aug 2005 11:07:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261958AbVHDPEs (ORCPT ); Thu, 4 Aug 2005 11:04:48 -0400 Received: from styx.suse.cz ([82.119.242.94]:14482 "EHLO mail.suse.cz") by vger.kernel.org with ESMTP id S262561AbVHDPDr (ORCPT ); Thu, 4 Aug 2005 11:03:47 -0400 Date: Thu, 4 Aug 2005 17:03:41 +0200 From: Vojtech Pavlik To: Jan De Luyck Cc: linux-kernel@vger.kernel.org, Con Kolivas , ck@vds.kolivas.org, tony@atomide.com, tuukka.tikkanen@elektrobit.com Subject: Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3 Message-ID: <20050804150341.GA10282@ucw.cz> References: <200508031559.24704.kernel@kolivas.org> <200508031354.52972.lkml@kcore.org> <200508032214.45451.kernel@kolivas.org> <200508031624.00319.lkml@kcore.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200508031624.00319.lkml@kcore.org> User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 03, 2005 at 04:23:59PM +0200, Jan De Luyck wrote: > On Wednesday 03 August 2005 14:14, Con Kolivas wrote: > > On Wed, 3 Aug 2005 21:54, Jan De Luyck wrote: > > > On Wednesday 03 August 2005 07:59, Con Kolivas wrote: > > > > This is the dynamic ticks patch for i386 as written by Tony Lindgen > > > > and Tuukka Tikkanen > > > > . Patch for 2.6.13-rc5 > > > > > > Compiles and runs ok here. > > > > > > Is there actually any timer frequency that's advisable to set as maximum? > > > (in the kernel config) > > > > I'd recommend 1000. > > Thanks. Currently the system - under X, KDE, no artsd, bottoms at around > 300HZ. In total single mode with every module unloaded that I can unload it > stops around 22HZ. > > I guess I'll have to go hunting whatever thing is causing the pollings. no > timertop yet, I guess? :P i8042 runs a steady periodic 20Hz timer. You can make it slower to get even the total low lower, and it will not affect performance under normal (sane hardware) circumstances. -- Vojtech Pavlik SuSE Labs, SuSE CR