Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932152AbWIPRfB (ORCPT ); Sat, 16 Sep 2006 13:35:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932444AbWIPRfB (ORCPT ); Sat, 16 Sep 2006 13:35:01 -0400 Received: from opersys.com ([64.40.108.71]:60178 "EHLO www.opersys.com") by vger.kernel.org with ESMTP id S932152AbWIPRfA (ORCPT ); Sat, 16 Sep 2006 13:35:00 -0400 Message-ID: <450C3A98.4060704@opersys.com> Date: Sat, 16 Sep 2006 13:55:36 -0400 From: Karim Yaghmour Reply-To: karim@opersys.com Organization: Opersys inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.6) Gecko/20060804 Fedora/1.0.4-0.5.1.fc5 SeaMonkey/1.0.4 MIME-Version: 1.0 To: Mathieu Desnoyers CC: Jes Sorensen , Ingo Molnar , Roman Zippel , Andrew Morton , tglx@linutronix.de, Paul Mundt , linux-kernel@vger.kernel.org, Christoph Hellwig , Ingo Molnar , Greg Kroah-Hartman , Tom Zanussi , ltt-dev@shafik.org, Michel Dagenais Subject: Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 References: <450AB957.2050206@opersys.com> <20060915142836.GA9288@localhost.usen.ad.jp> <450ABE08.2060107@opersys.com> <1158332447.5724.423.camel@localhost.localdomain> <20060915111644.c857b2cf.akpm@osdl.org> <20060915181907.GB17581@elte.hu> <20060915200559.GB30459@elte.hu> <20060915202233.GA23318@Krystal> <450BCAF1.2030205@sgi.com> <20060916172419.GA15427@Krystal> In-Reply-To: <20060916172419.GA15427@Krystal> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 716 Lines: 23 Mathieu Desnoyers wrote: > The bottom line is : > > LTTng impact on the studied phenomenon : 35% slower > > LTTng+kprobes impact on the studied phenomenon : 73% slower > > Therefore, I conclude that on this type of high event rate workload, kprobes > doubles the tracer impact on the system. Amen to that. Hopefully this puts to rest the myth of Mr. Scrub. Karim -- President / Opersys Inc. Embedded Linux Training and Expertise www.opersys.com / 1.866.677.4546 - 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/