From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751020AbXAPLgR (ORCPT ); Tue, 16 Jan 2007 06:36:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751019AbXAPLgR (ORCPT ); Tue, 16 Jan 2007 06:36:17 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:55461 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751013AbXAPLgQ (ORCPT ); Tue, 16 Jan 2007 06:36:16 -0500 Date: Tue, 16 Jan 2007 12:35:05 +0100 From: Ingo Molnar To: "Siddha, Suresh B" Cc: vatsa@in.ibm.com, clameter@sgi.com, tglx@linutronix.de, arjan@linux.intel.com, linux-kernel@vger.kernel.org Subject: Re: [RFC] Patch: dynticks: idle load balancing Message-ID: <20070116113505.GA6294@elte.hu> References: <20061211155304.A31760@unix-os.sc.intel.com> <20061213224317.GA2986@elte.hu> <20061213231316.GA13849@elte.hu> <20061213150314.B12795@unix-os.sc.intel.com> <20061213233157.GA20470@elte.hu> <20061213151926.C12795@unix-os.sc.intel.com> <20061219201247.GA12648@elte.hu> <20061219131223.E23105@unix-os.sc.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061219131223.E23105@unix-os.sc.intel.com> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.6 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.6 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0007] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Suresh, on the latest -rt kernel, when the dynticks load-balancer is enabled, then a dual-core Core2 Duo test-system increases its irq rate from the normal 15/17 per second to 300-400/sec - on a completely idle system(!). Any idea what's going on? I'll disable the load balancer for now. Ingo