Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752756AbZIVCn7 (ORCPT ); Mon, 21 Sep 2009 22:43:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752719AbZIVCn5 (ORCPT ); Mon, 21 Sep 2009 22:43:57 -0400 Received: from ozlabs.org ([203.10.76.45]:59269 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751982AbZIVCnq (ORCPT ); Mon, 21 Sep 2009 22:43:46 -0400 Date: Tue, 22 Sep 2009 12:39:20 +1000 From: Anton Blanchard To: Frederic Weisbecker , KOSAKI Motohiro , Li Zefan , Zhaolei , Lai Jiangshan , Ingo Molnar , Steven Rostedt Cc: linux-kernel@vger.kernel.org Subject: [PATCH 0/2] tracing/workqueue fixes Message-ID: <20090922023920.GA31801@kryten> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 847 Lines: 22 Hi, The workqueue tracepoint patchset looks to have stalled for a bit. While we discuss how much functionality we want in kernel, I think we have a solid case for tracing the latency caused by workqueue events. For an example we can look at the rt_worker_func work. As memory grew its duration would also grow, and I measured 14ms spikes on one box. Once found we placed a cap on it: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c9503e0fe052020e0294cd07d0ecd982eb7c9177 The following patches add entry and exit tracepoints so we can find these things easily. Anton -- 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/