Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753174AbXHBG1K (ORCPT ); Thu, 2 Aug 2007 02:27:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751889AbXHBG0z (ORCPT ); Thu, 2 Aug 2007 02:26:55 -0400 Received: from [202.78.101.198] ([202.78.101.198]:37006 "EHLO mx1.hq.astra.ph" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751883AbXHBG0y (ORCPT ); Thu, 2 Aug 2007 02:26:54 -0400 Message-ID: <46B17937.1050401@gmail.com> Date: Thu, 02 Aug 2007 14:27:03 +0800 From: Carlo Florendo User-Agent: Thunderbird 1.5.0.12 (Windows/20070509) MIME-Version: 1.0 To: =?UTF-8?B?TGVuYXIgTMO1aG11cw==?= Cc: Klaus Schulz , ck@vds.kolivas.org, linux-kernel@vger.kernel.org, mingo@elte.hu Subject: Re: ck vs. cfs : realtime audio performance References: <1185870355.7933.55.camel@klaus-laptop> <1185886161.7397.11.camel@klaus-laptop> <46AF3111.7090206@city.ee> In-Reply-To: <46AF3111.7090206@city.ee> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2233 Lines: 68 Lenar Lõhmus wrote: > Klaus Schulz wrote: >>> I am currently testing the 2.6.22.1 cfs-rt9 vs. ck1 on my rather pure >>> realtime high-end-audio setup. (NO X, just a terminal, streaming >>> .wav. I am using my own written player and brutefir as the audio >>> engine.) >>> Comment: This is not a standard (amarok or xmms setup), all buffers in >>> the chain are very small. Any problem will immidetialy end up in xruns. >>> The sounddriver, HW (pci-bus etc.) are tweaked accordingly >>> Until now ck1 on 2.6.22 is giving me better results (less audible >>> distortions) and runs extremely stable compared to cfs. Under ck I >>> ran my player with schedtool -R -p 98, which was better than >>> running it e.g. with nice -20 Both setups under cfs were giving me >>> worse results than ck. >>> With CFS I also experienced XRUNS from time to time, what never happened >>> with ck. See, this is exactly the problem of the SD ranters. A ranter posts a problem, doesn't give reproducability hints, and neither provides technical detail, not even the slightest relevant stats. And the most irritating part is that the code that the OP wrote (or at least its relevant parts) is not even available for download. I was wondering why the OP need timers for audio playback. What type of audio? PCM, MIDI? Once does not need timers for PCM playback but for MIDI. SD ranters. Pure rants. Thank you very much. Best Regards, Carlo -- Carlo Florendo Softare Engineer/Network Co-Administrator Astra Philippines Inc. UP-Ayala Technopark, UP Campus Diliman 1101 Quezon City, Philippines http://www.astra.ph -- The Astra Group of Companies 5-3-11 Sekido, Tama City Tokyo 206-0011, Japan http://www.astra.co.jp -- Carlo Florendo Softare Engineer/Network Co-Administrator Astra Philippines Inc. UP-Ayala Technopark, UP Campus Diliman 1101 Quezon City, Philippines http://www.astra.ph -- The Astra Group of Companies 5-3-11 Sekido, Tama City Tokyo 206-0011, Japan http://www.astra.co.jp - 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/