From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932582AbVHTHVJ (ORCPT ); Sat, 20 Aug 2005 03:21:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932099AbVHTHVI (ORCPT ); Sat, 20 Aug 2005 03:21:08 -0400 Received: from gateway-1237.mvista.com ([12.44.186.158]:34811 "EHLO av.mvista.com") by vger.kernel.org with ESMTP id S932582AbVHTHVH (ORCPT ); Sat, 20 Aug 2005 03:21:07 -0400 Message-ID: <43067713.4040700@mvista.com> Date: Fri, 19 Aug 2005 17:19:31 -0700 From: George Anzinger Reply-To: george@mvista.com Organization: MontaVista Software User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050323 Fedora/1.7.6-1.3.2 X-Accept-Language: en-us, en MIME-Version: 1.0 To: tglx@linutronix.de CC: Ingo Molnar , Roland McGrath , Oleg Nesterov , linux-kernel@vger.kernel.org, Steven Rostedt , "Paul E. McKenney" Subject: Re: [PATCH 2.6.13-rc6-rt9] PI aware dynamic priority adjustment References: <20050818060126.GA13152@elte.hu> <1124495303.23647.579.camel@tglx.tec.linutronix.de> In-Reply-To: <1124495303.23647.579.camel@tglx.tec.linutronix.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Thomas Gleixner wrote: ~ > > 2. Drift of cyclic timers (armed by set_timer()): > > Due to rounding errors and the drift adjustment code, the fixed > increment which is precalculated when the timer is set up and added on > rearm, I see creeping deviation from the timeline. > > I have a patch lined up to base the rearm on human (nsac) units, so this > effect will go away. But this is waste of time until (1.) is not solved. > > George ??? Could I (we) see what you have in mind? > -- George Anzinger george@mvista.com HRT (High-res-timers): http://sourceforge.net/projects/high-res-timers/