From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756865AbZBPKuH (ORCPT ); Mon, 16 Feb 2009 05:50:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751270AbZBPKtz (ORCPT ); Mon, 16 Feb 2009 05:49:55 -0500 Received: from smtp-101-monday.noc.nerim.net ([62.4.17.101]:54540 "EHLO mallaury.nerim.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751170AbZBPKtz (ORCPT ); Mon, 16 Feb 2009 05:49:55 -0500 Date: Mon, 16 Feb 2009 11:49:49 +0100 From: Damien Wyart To: Ingo Molnar Cc: Peter Zijlstra , Mike Galbraith , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List Subject: Re: [Bug #12650] Strange load average and ksoftirqd behavior with 2.6.29-rc2-git1 Message-ID: <20090216104949.GA23976@localhost.localdomain> References: <20090215080941.GA2295@localhost.localdomain> <20090215090026.GA31147@elte.hu> <20090215095128.GA3234@localhost.localdomain> <20090215101351.GA23274@elte.hu> <20090215103445.GA2335@localhost.localdomain> <20090215110104.GB31351@elte.hu> <20090215180355.GA2273@localhost.localdomain> <20090215193102.GA16873@elte.hu> <20090216084223.GA2641@localhost.localdomain> <20090216092100.GH6182@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090216092100.GH6182@elte.hu> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > > Does it find any TSC time warps? > > Seems not. > ok, it's indeed pretty conclusive: > | 2 CPUs, running 2 parallel test-tasks. > | checking for time-warps via: > | - read time stamp counter (RDTSC) instruction (cycle resolution) > | > | | TSC: 0.32us, fail:0 | > i suspect you ran it for at least a couple of minutes, and the ksoftirqd > anomaly occured during it, right? Yes, that's right. I ran it for a few ten of minutes and the ksoftirqd anomaly was occuring. -- Damien