From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rodrigo Amestica Subject: Re: real-time priority Date: Thu, 19 Mar 2009 19:11:19 -0400 Message-ID: <49C2D117.9070501@lavabit.com> References: <49C2CAFB.5030702@lavabit.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: linux-rt-users@vger.kernel.org Return-path: Received: from karen.lavabit.com ([72.249.41.33]:59975 "EHLO karen.lavabit.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753744AbZCSXLV (ORCPT ); Thu, 19 Mar 2009 19:11:21 -0400 Received: from d.earth.lavabit.com (d.earth.lavabit.com [192.168.111.13]) by karen.lavabit.com (Postfix) with ESMTP id C382811B7E6 for ; Thu, 19 Mar 2009 18:11:19 -0500 (CDT) Received: from 192.168.1.110 (c-76-104-20-168.hsd1.va.comcast.net [76.104.20.168]) by lavabit.com with ESMTP id WDQNBDMY8ST3 for ; Thu, 19 Mar 2009 18:11:19 -0500 In-Reply-To: <49C2CAFB.5030702@lavabit.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: yes, i forgot to include the link. now it goes. http://www.ddj.com/linux-open-source/200900827 Rodrigo Amestica wrote: > Hi, > > general questions from somebody who's just starting to look into the > preempt patch. > > the article linked below makes direct reference to the behavior of the > preempt rt patch. The article was written in 2007. How much of that > still holds true in the current version of the patch? > > I'm basically wondering about the first sentences in the abstract of > that article. The big picture seems to be rather simple: calls to > specific linux services could break the performance of a real time > task by depending on lower priority tasks to complete that service. > > Does this mean that one must always be alert to which system services > are invoked during the execution of a real time task? Does the vanilla > kernel or the preempt-rt patch tries to somehow detect this condition > and alert somehow? > > thanks, > Rodrigo > > -- > To unsubscribe from this list: send the line "unsubscribe > linux-rt-users" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > ____________________________________________________________________________________ > > Click here to find the perfect banking opportunity! > http://ads.lavabit.com/fc/BLSrjwrz8JR8QtO2thrVR65MkKPO7Tm4zsO0sj7xJYVXikFfIocXosXcLFO/ > > ____________________________________________________________________________________ >