Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751250AbWCVQKo (ORCPT ); Wed, 22 Mar 2006 11:10:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751314AbWCVQKo (ORCPT ); Wed, 22 Mar 2006 11:10:44 -0500 Received: from mxsf17.cluster1.charter.net ([209.225.28.217]:27528 "EHLO mxsf17.cluster1.charter.net") by vger.kernel.org with ESMTP id S1751250AbWCVQKn (ORCPT ); Wed, 22 Mar 2006 11:10:43 -0500 X-IronPort-AV: i="4.03,119,1141621200"; d="scan'208"; a="920045331:sNHT18553894" Message-ID: <442176EB.1050403@cybsft.com> Date: Wed, 22 Mar 2006 10:10:19 -0600 From: "K.R. Foley" Organization: Cybersoft Solutions, Inc. User-Agent: Thunderbird 1.5 (X11/20051201) MIME-Version: 1.0 To: "K.R. Foley" CC: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: 2.6.16-rt1 References: <20060320085137.GA29554@elte.hu> <441F8017.4040302@cybsft.com> <20060321211653.GA3090@elte.hu> <4420B5F0.6000201@cybsft.com> <20060322062932.GA17166@elte.hu> <44215CCB.1080005@cybsft.com> In-Reply-To: <44215CCB.1080005@cybsft.com> X-Enigmail-Version: 0.93.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1395 Lines: 34 K.R. Foley wrote: > Ingo Molnar wrote: >> * K.R. Foley wrote: >> >>> Sorry I have been onsite and completely buried today. Am running an >>> initial test on both UP and SMP now with 2.6.16-rt1. UP doesn't look >>> bad at all. SMP on the other hand doesn't look so good. I will give >>> -rt4 a spin when these are done. >> thanks for the testing - i'll check SMP too. >> >> Ingo >> > OK. On my dual 933 under heavy load I get the following with 2.6.16-rt4 > and I get tons of missed interrupts. Running 2.6.15-rc16 I get a max of > 88usec with most falling under 30usec. On my UP AthlonXP 1700 I get a > max of 19usec with 2.6.16-rt4 under load. What sort of results do you > see on SMP? > Found something interesting. Having Wakeup latency timing turned on makes a HUGE difference. I turned it off and recompiled and now I am seeing numbers back in line with what I expected from 2.6.16-rt4. Sorry, but I had no idea it would make that much difference. I don't have a complete run yet, but I have seen enough to know that I am not seeing tons of missed interrupts and the highest reported latency thus far is 61 usec. -- kr - 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/