From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266353AbUHTLVz (ORCPT ); Fri, 20 Aug 2004 07:21:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266449AbUHTLVz (ORCPT ); Fri, 20 Aug 2004 07:21:55 -0400 Received: from amalthea.dnx.de ([193.108.181.146]:32397 "EHLO amalthea.dnx.de") by vger.kernel.org with ESMTP id S266353AbUHTLVx (ORCPT ); Fri, 20 Aug 2004 07:21:53 -0400 Date: Fri, 20 Aug 2004 13:21:46 +0200 From: Robert Schwebel To: Linux Kernel Mailing List Subject: Re: DTrace-like analysis possible with future Linux kernels? Message-ID: <20040820112146.GK29410@pengutronix.de> References: <200408191822.48297.miles.lane@comcast.net> <87hdqyogp4.fsf@killer.ninja.frodoid.org> <1092954824.28931.9.camel@localhost.localdomain> <1092996500.29012.88.camel@cambridge.braddahead.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1092996500.29012.88.camel@cambridge.braddahead.com> User-Agent: Mutt/1.4i X-Scan-Signature: 5f06452935e2f83c8f27be9c3ae2dd7b Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 20, 2004 at 11:08:21AM +0100, Alex Bennee wrote: > Well profiling for user space developers. Certainly for embedded "soft > realtime" work I've found LTT really useful in understanding where the > contentions where in my user-space code. And also why the old pthread > mutex didn't work well with SCHED_RT priorities :-( > > If it was my choice I'd like to see LTT merged, but of course its not > all about me much as I wish it was ;-) Same here - LTT turned out to be a useful tool for debugging performance issues in several USB gadget drivers. Sure, it would have been possible to instrument the boxes with the scope and trace things in hardware, but with LTT it was much easier to handle. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Hornemannstraße 12, 31137 Hildesheim, Germany Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4