From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262629AbVFLPsv (ORCPT ); Sun, 12 Jun 2005 11:48:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262633AbVFLPsv (ORCPT ); Sun, 12 Jun 2005 11:48:51 -0400 Received: from soufre.accelance.net ([213.162.48.15]:19159 "EHLO soufre.accelance.net") by vger.kernel.org with ESMTP id S262629AbVFLPsa (ORCPT ); Sun, 12 Jun 2005 11:48:30 -0400 Message-ID: <42AC5949.8070703@xenomai.org> Date: Sun, 12 Jun 2005 17:48:25 +0200 From: Philippe Gerum Organization: Xenomai User-Agent: Debian Thunderbird 1.0.2 (X11/20050331) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kristian Benoit CC: linux-kernel@vger.kernel.org Subject: Re: PREEMPT_RT vs ADEOS: the numbers, part 1 References: <42AA6A6B.5040907@opersys.com> <42AA812D.2060701@yahoo.com.au> <1118481315.9519.39.camel@sdietrich-xp.vilm.net> <1118499356.5786.16.camel@localhost> In-Reply-To: <1118499356.5786.16.camel@localhost> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Kristian Benoit wrote: > On Sat, 2005-06-11 at 02:15 -0700, Sven-Thorsten Dietrich wrote: > >>Its a good start, and its excellent that its being looked at. Thank >>you >>guys very much for taking the time to compare these 2 very different >>systems. > > > Youre welcome ! > > >>I think the comparison should absolutely compare identical community >>kernels. The comparison between two different release candidates is >>questionable. rc2 to rc4 doesn't seem like much, after all, how much >>code could go into a release candidate. (diff | wc -l) > > > I agree with that, but as the results show, there does'nt seems to be > much difference impact the numbers in the tested field. > > >>Also, I question testing -rc code in the first place, except for >>regression purposes. > > > I tested the -rc code in orther to be able to compare the patched > kernels against theird own source. > > >>How does that effort compare for porting ADEOS code? If several weeks >>of >>work are invested in a comparison of rc2 to rc4, how much additional >>work is needed to bring Adeos up to the base for the current RT >>kernel? > It has already been done using 2.6.12-rc2/x86 + RT-V0.7.44-03 a few weeks ago. Since it was the first time such merge was attempted, it took me a week to get a functional patch which could run a complex "client" OS such as RTAI over it. Now that the infrastructure is in place, I guess that the task should be simpler, since hopefully, I now better understand the implications of having PREEMPT_RT into the kernel codebase. > > Philippe, I think that question is youre ! > -- Philippe.