Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262982AbUJ1MMj (ORCPT ); Thu, 28 Oct 2004 08:12:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262985AbUJ1MMh (ORCPT ); Thu, 28 Oct 2004 08:12:37 -0400 Received: from opersys.com ([64.40.108.71]:62724 "EHLO www.opersys.com") by vger.kernel.org with ESMTP id S262982AbUJ1MIP (ORCPT ); Thu, 28 Oct 2004 08:08:15 -0400 Message-ID: <4180DF18.5060808@opersys.com> Date: Thu, 28 Oct 2004 07:59:20 -0400 From: Karim Yaghmour Reply-To: karim@opersys.com Organization: Opersys inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 X-Accept-Language: en-us, en, fr, fr-be, fr-ca, fr-fr MIME-Version: 1.0 To: Ingo Molnar CC: linux-kernel@vger.kernel.org Subject: Re: [RFC][PATCH] Restricted hard realtime References: <20041023194721.GB1268@us.ibm.com> <417F12F1.5010804@opersys.com> <20041026212956.4729ce98.akpm@osdl.org> <20041027081044.GA14451@elte.hu> In-Reply-To: <20041027081044.GA14451@elte.hu> 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 Content-Length: 1037 Lines: 28 Ingo Molnar wrote: > with -RT-V0.3 i get lower than 20 usec _maximum_ latencies during > './hackbench 20'. (the average latency is 1 usec) So while i'm not yet > in the sub-femtosecond category, things are looking pretty good in > PREEMPT_REALTIME land :) Just curious: what's the setup here? (CPU speed, peripherals, distro, applications being run to load the system, etc.) You may have described this elsewhere on LKML and I may have missed it (sorry, I just can't read everything that comes through). I'm assuming that the timings are measured using the tracing functionality currently in the patches. Thanks, 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/