From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262775AbVHDWOX (ORCPT ); Thu, 4 Aug 2005 18:14:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262722AbVHDWOK (ORCPT ); Thu, 4 Aug 2005 18:14:10 -0400 Received: from mail.gmx.net ([213.165.64.20]:64932 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262777AbVHDWNt (ORCPT ); Thu, 4 Aug 2005 18:13:49 -0400 X-Authenticated: #1725425 Date: Fri, 5 Aug 2005 00:12:44 +0200 From: Marc Ballarin To: Con Kolivas Cc: linux-kernel@vger.kernel.org, ck@vds.kolivas.org, tony@atomide.com, tuukka.tikkanen@elektrobit.com Subject: Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3 Message-Id: <20050805001244.65f41b4f.Ballarin.Marc@gmx.de> In-Reply-To: <200508031559.24704.kernel@kolivas.org> References: <200508031559.24704.kernel@kolivas.org> X-Mailer: Sylpheed version 2.0.0rc (GTK+ 2.6.7; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 3 Aug 2005 15:59:24 +1000 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 One issue (tested the -rc4 Version on -mm): - on interrupt flood (ping -f) HZ goes down to 0-4 HZ. This matches "ticks to skip" below. Coincidence? - ping -f complains: .Warning: time of day goes back (-304us), taking countermeasures. ... .Warning: time of day goes back (-33us), taking countermeasures. Yet, system time _seems_ to be kept correctly. CPU is Pentium M. dmesg: Using pmtmr for high-res timesource dyn-tick: Found suitable timer: pmtmr dyn-tick: Maximum ticks to skip limited to 54 dyn-tick: Timer not enabled during boot sysfs: suitable: 1 enabled: 1 using APIC: 0 Regards