From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933004AbXK2T1G (ORCPT ); Thu, 29 Nov 2007 14:27:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756598AbXK2T0w (ORCPT ); Thu, 29 Nov 2007 14:26:52 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:37744 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756222AbXK2T0w (ORCPT ); Thu, 29 Nov 2007 14:26:52 -0500 Date: Thu, 29 Nov 2007 20:26:35 +0100 From: Ingo Molnar To: Miklos Szeredi Cc: jdike@addtoit.com, user-mode-linux-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: scheduling anomaly on uml (was: -rt doesn't compile for UML) Message-ID: <20071129192635.GE5238@elte.hu> References: <20071128150637.GA5518@c2.user-mode-linux.org> <20071128182935.GA8048@c2.user-mode-linux.org> <20071129105744.GI10577@elte.hu> <20071129162556.GA4268@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Miklos Szeredi wrote: > > heh :-) Scheduling isnt hard either - and looking at traces > > (especially with mcount_enabled=1) certainly helps. > > I still don't know what mcount_enabled=1 should do. I didn't see any > difference in the trace after enabling it. if you build with CONFIG_FUNCTION_TRACING then you should see a trace of *every* function call done within the kernel. Warning: reading it can be very addictive ;-) Ingo