Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 28 Feb 2002 07:51:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 28 Feb 2002 07:49:00 -0500 Received: from nixpbe.pdb.sbs.de ([192.109.2.33]:15757 "EHLO nixpbe.pdb.sbs.de") by vger.kernel.org with ESMTP id ; Thu, 28 Feb 2002 07:45:37 -0500 Date: Thu, 28 Feb 2002 13:48:23 +0100 (CET) From: Martin Wilck To: Linux Kernel mailing list cc: Martin Wilck Subject: PROBLEM: Timer interrupt lockup on HT machine Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, we have found another problem with our HT ("Jackson") prototype machines. In our reboot tests we found that sometimes the timer interrupts stop. This happens typically after ~30-50 seconds. >From that time on, no more timer interrupts are encountered. This happens only when the logical Jackson CPUs are enabled, i.e. with the "acpismp=force" command line parameter, and approximately at every 10th boot. Another observation is that on the HT machines (whether or not the above problem occurs) almost all interrupts seem to be handled by CPU 0. CPU 1 gets a few, but in a ratio of about 1:10000 wrt CPU 0. CPU 2 and 3 do not see any interrupts at all. Has anybody heard of these problems yet, and are workarounds available? I am currently investigating the problem and will be happy to supply more information if requested. Martin -- Martin Wilck Phone: +49 5251 8 15113 Fujitsu Siemens Computers Fax: +49 5251 8 20409 Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com D-33106 Paderborn http://www.fujitsu-siemens.com/primergy - 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/