From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261497AbVFKA7V (ORCPT ); Fri, 10 Jun 2005 20:59:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261498AbVFKA7V (ORCPT ); Fri, 10 Jun 2005 20:59:21 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:28645 "EHLO e1.ny.us.ibm.com") by vger.kernel.org with ESMTP id S261497AbVFKA7M (ORCPT ); Fri, 10 Jun 2005 20:59:12 -0400 Date: Fri, 10 Jun 2005 17:59:35 -0700 From: "Paul E. McKenney" To: Eric Piel Cc: Chris Friesen , linux-kernel@vger.kernel.org, bhuey@lnxw.com, andrea@suse.de, tglx@linutronix.de, karim@opersys.com, mingo@elte.hu, pmarques@grupopie.com, bruce@andrew.cmu.edu, nickpiggin@yahoo.com.au, ak@muc.de, sdietrich@mvista.com, dwalker@mvista.com, hch@infradead.org, akpm@osdl.org Subject: Re: Attempted summary of "RT patch acceptance" thread Message-ID: <20050611005934.GM1300@us.ibm.com> Reply-To: paulmck@us.ibm.com References: <20050608022646.GA3158@us.ibm.com> <42A73D15.6080201@nortel.com> <20050608192853.GE1295@us.ibm.com> <42AA133D.1050102@lifl.fr> <20050610230433.GI1300@us.ibm.com> <42AA20F6.9030606@lifl.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <42AA20F6.9030606@lifl.fr> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jun 11, 2005 at 01:23:34AM +0200, Eric Piel wrote: > 06/11/2005 01:04 AM, Paul E. McKenney wrote/a écrit: > >>Just a small change to "1 - QoS": > >> > >> > >>>b. For each service: > >>> > >>> i. Probability of missing a deadline due to software, > >>> ranging from 0 to 1, with the value of 1 corresponding > >>> to the hardest possible hard realtime. > >> > >>I think it should be (by reference to how you define probability at the > >>beginning of the section): > >>Probability of not missing any deadline due to software > > > > > >Good catch! How about the following? > > > > i. Probability of meeting a deadline due to software, > > ranging from 0 to 1, with the value of 1 corresponding > > to the hardest possible hard realtime. > > > >Changing "missing" in the original to "meeting". > > It sounds strange to me (but english is not my mother tongue), it's like > hardware was not so good but software helped to recover the situation > and, eventually, the deadline was met ;-) Hmmm... It would appear that English's being my mother tongue is not helping me as much as one might hope. ;-) > What about using the way you wrote it at the beginning of the section: > "Probability of missing a deadline only because of a hardware failure" Good point, I may just need to invert the whole thing, so that it becomes something like: i. Probability of missing a deadline due to software, ranging from 0 to 1, with the value of 0 corresponding to the hardest possible hard realtime. But then the "p^n" becomes "1-(1-p)^n". Bleah. OK, how about the following? i. Probability of meeting a deadline in absence of hardware failure, ranging from 0 to 1, with the value of 1 corresponding to the hardest possible hard realtime. Thanx, Paul