From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750928AbVH3Nrr (ORCPT ); Tue, 30 Aug 2005 09:47:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751283AbVH3Nrr (ORCPT ); Tue, 30 Aug 2005 09:47:47 -0400 Received: from frankvm.xs4all.nl ([80.126.170.174]:55176 "EHLO janus.localdomain") by vger.kernel.org with ESMTP id S1750926AbVH3Nrq (ORCPT ); Tue, 30 Aug 2005 09:47:46 -0400 Date: Tue, 30 Aug 2005 15:47:43 +0200 From: Frank van Maarseveen To: Nathan Becker Cc: linux-kernel@vger.kernel.org Subject: Re: lost ticks and Hangcheck Message-ID: <20050830134743.GA26890@janus> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-Subliminal-Message: Use Linux! Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 19, 2005 at 12:41:07AM -0700, Nathan Becker wrote: > Hi, > > I'm running kernel 2.6.12.5 with x86_64 target on an AMD X2 4800+ and > Gigabyte GA-K8NXP-SLI motherboard (bios version F8). I'm having a problem > with lost clock ticks. The dmesg says > > warning: many lost ticks. > Your time source seems to be instable or some driver is hogging interupts > > Also if I enable hangcheck, then I get a huge number of Hangcheck messages > in dmesg. I get a lot of "kernel: Hangcheck: hangcheck value past margin!" messages from 2.6.13-rc7 on AMD64 X2 3800+ and Asus A8V deluxe motherboard. No lost ticks messages however. > > The main other symptom is that the system clock runs fast and > inaccurately. It seems to run more inaccurately when I'm using the CPU, > and be basically OK when idling. That seems to be the case here too: clock runs too fast under heavy load (burn-in tests involving kernel builds and large disk copies). -- Frank