From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261180AbVFLTay (ORCPT ); Sun, 12 Jun 2005 15:30:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261282AbVFLTaP (ORCPT ); Sun, 12 Jun 2005 15:30:15 -0400 Received: from opersys.com ([64.40.108.71]:39436 "EHLO www.opersys.com") by vger.kernel.org with ESMTP id S261180AbVFLTSc (ORCPT ); Sun, 12 Jun 2005 15:18:32 -0400 Message-ID: <42AC8D00.4030809@opersys.com> Date: Sun, 12 Jun 2005 15:29:04 -0400 From: Karim Yaghmour Reply-To: karim@opersys.com Organization: Opersys inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040805 Netscape/7.2 X-Accept-Language: en-us, en, fr, fr-be, fr-ca, fr-fr MIME-Version: 1.0 To: Ingo Molnar CC: Kristian Benoit , linux-kernel@vger.kernel.org, paulmck@us.ibm.com, bhuey@lnxw.com, andrea@suse.de, tglx@linutronix.de, 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, rpm@xenomai.org Subject: Re: PREEMPT_RT vs ADEOS: the numbers, part 1 References: <42AA6A6B.5040907@opersys.com> <20050611191448.GA24152@elte.hu> <42AB662B.4010104@opersys.com> <20050612061108.GA4554@elte.hu> In-Reply-To: <20050612061108.GA4554@elte.hu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > ok, this method should work fine. I suspect you increased the parport > IRQ's priority to the maximum on the PREEMPT_RT kernel, correct? Was > there any userspace thread on the target system (receiving the parport > request and sending the reply), or was it all done in a kernelspace > parport driver? This is all done in kernelspace. I'll check with Kristian for the rest. In the mean time, let me know if you have any recommendations based on the fact that it's indeed in the kernel. Karim -- Author, Speaker, Developer, Consultant Pushing Embedded and Real-Time Linux Systems Beyond the Limits http://www.opersys.com || karim@opersys.com || 1-866-677-4546