Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 27 Mar 2001 16:58:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 27 Mar 2001 16:58:17 -0500 Received: from [64.66.225.141] ([64.66.225.141]:15877 "EHLO hapablap.dyn.dhs.org") by vger.kernel.org with ESMTP id ; Tue, 27 Mar 2001 16:58:03 -0500 Date: Tue, 27 Mar 2001 15:36:01 -0600 From: Steven Walter To: Thomas Pfaff Cc: linux-kernel@vger.kernel.org Subject: Re: 2.4.2: System clock slows down under load Message-ID: <20010327153600.A6238@hapablap.dyn.dhs.org> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from tpfaff@gmx.net on Tue, Mar 27, 2001 at 01:42:39PM +0200 X-Uptime: 3:34pm up 5:12, 1 user, load average: 1.33, 1.33, 1.28 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 27, 2001 at 01:42:39PM +0200, Thomas Pfaff wrote: > Hi all, > > i decided to make a test for the 2.4 kernel on my old hardware (Gigabyte > EISA/VLB with an AMD 486 DX4 133). The kernel boots fine but there is one > strange thing: The system clock slows down under load, after a make > dep in the linux src directory it is about 2 minutes behind. This appears > both in 2.4.1 and in 2.4.2 (I have not tried 2.4.0 yet). > > I have attached a gzipped dmesg. > > Any ideas ? I notice that you're using fbcon from your dmesg. There was a discussion about this a while back, and it was determined that fbcon runs with interrupts disabled for unhealthily long period of time. This causes it to miss timer interrupts, and the system lock get behind. See if this slowdown occurs with vgacon. If it does, its probably just a cheap crystal on the motherboard. -- -Steven Freedom is the freedom to say that two plus two equals four. - 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/