Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267312AbUJITY7 (ORCPT ); Sat, 9 Oct 2004 15:24:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267314AbUJITY7 (ORCPT ); Sat, 9 Oct 2004 15:24:59 -0400 Received: from gonzo.webpack.hosteurope.de ([217.115.142.69]:12466 "EHLO gonzo.webpack.hosteurope.de") by vger.kernel.org with ESMTP id S267312AbUJITY5 (ORCPT ); Sat, 9 Oct 2004 15:24:57 -0400 Date: Sat, 9 Oct 2004 21:26:14 +0000 From: stefan.eletzhofer@eletztrick.de To: linux-kernel Subject: Re: [ANNOUNCE] Linux 2.6 Real Time Kernel Message-ID: <20041009212614.GA25441@tier.local> Reply-To: stefan.eletzhofer@eletztrick.de Mail-Followup-To: stefan.eletzhofer@eletztrick.de, linux-kernel References: <41677E4D.1030403@mvista.com> <416822B7.5050206@opersys.com> <1097346628.1428.11.camel@krustophenia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1097346628.1428.11.camel@krustophenia.net> Organization: Eletztrick Computing User-Agent: Mutt/1.5.6i X-HE-MXrcvd: no Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1621 Lines: 42 On Sat, Oct 09, 2004 at 02:30:28PM -0400, Lee Revell wrote: > On Sat, 2004-10-09 at 13:41, Karim Yaghmour wrote: > > Sven-Thorsten Dietrich wrote: > > > - Voluntary Preemption by Ingo Molnar > > > - IRQ thread patches by Scott Wood and Ingo Molnar > > > - BKL mutex patch by Ingo Molnar (with MV extensions) > > > - PMutex from Germany's Universitaet der Bundeswehr, Munich > > > - MontaVista mutex abstraction layer replacing spinlocks with mutexes > > > > To the best of my understanding, this still doesn't provide deterministic > > hard-real-time performance in Linux. > > Using only the VP+IRQ thread patch, I ran my RT app for 11 million > cycles yesterday, with a maximum delay of 190 usecs. How would this not > satisfy a 200 usec hard RT constraint? I think the keyword here is "deterministic", isn't it? > > PHB: "I've looked at your proposal and decided it can't be done" > Dilbert: "I just did it. It's working perfectly" > > Lee > > - > 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/ -- Stefan Eletzhofer InQuant Data GBR http://www.inquant.de +49 (0) 751 35 44 112 +49 (0) 171 23 24 529 (Mobil) +49 (0) 751 35 44 115 (FAX) - 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/