Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756162AbYAWSLn (ORCPT ); Wed, 23 Jan 2008 13:11:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754037AbYAWSLe (ORCPT ); Wed, 23 Jan 2008 13:11:34 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:38683 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753953AbYAWSLd (ORCPT ); Wed, 23 Jan 2008 13:11:33 -0500 Subject: Re: [PATCH 19/20 -v5] Trace irq disabled critical timings From: Peter Zijlstra To: "Frank Ch. Eigler" Cc: Steven Rostedt , LKML , Ingo Molnar , Linus Torvalds , Andrew Morton , Christoph Hellwig , Mathieu Desnoyers , Gregory Haskins , Arnaldo Carvalho de Melo , Thomas Gleixner , Tim Bird , Sam Ravnborg , Jan Kiszka , John Stultz , Arjan van de Ven , Steven Rostedt In-Reply-To: <20080123172712.GE18698@redhat.com> References: <20080123160236.969334052@goodmis.org> <20080123160444.197366580@goodmis.org> <20080123165353.GA12598@goodmis.org> <20080123171107.GB12598@goodmis.org> <20080123172712.GE18698@redhat.com> Content-Type: text/plain Date: Wed, 23 Jan 2008 18:58:23 +0100 Message-Id: <1201111103.6341.73.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.21.5 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 925 Lines: 24 On Wed, 2008-01-23 at 12:27 -0500, Frank Ch. Eigler wrote: > Hi - > > On Wed, Jan 23, 2008 at 12:11:07PM -0500, Steven Rostedt wrote: > > This patch adds latency tracing for critical timings > > (how long interrupts are disabled for). > > [...] > > Is there an opportunity here to share effort with latencytop, and > ideally to use markers as much as possible for these event hooks? I'm still thinking latencytop should only record stack traces and do the rest in user-space. Also, the things the latency tracer and latecytop measure are quite different. the latency tracer measures how long a non-schedulable section is, latencytop measures how a task was scheduled away. -- 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/