From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755451AbZBOTSS (ORCPT ); Sun, 15 Feb 2009 14:18:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752890AbZBOTSE (ORCPT ); Sun, 15 Feb 2009 14:18:04 -0500 Received: from smtp-114-sunday.nerim.net ([62.4.16.114]:60168 "EHLO maiev.nerim.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752755AbZBOTSD (ORCPT ); Sun, 15 Feb 2009 14:18:03 -0500 Date: Sun, 15 Feb 2009 20:18:00 +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: <20090215191800.GA2350@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090215180355.GA2273@localhost.localdomain> 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 > > Also, my guess is that if you boot via idle=poll, the symptoms go away. > > This would strengthen the suspicion that it's scheduler-clock troubles. > In fact, with idle=poll, the symptoms do not go away, they are much > stronger: without it, ksotirqd have a few % of CPU in top output; with > it, they have 20 or 30% and the global average is not far from 1. Not true each time, in fact. Another try with this option gave same symptoms as without it, not stronger. In any case, they never go away. -- Damien