From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 13 Jan 2002 02:20:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 13 Jan 2002 02:19:53 -0500 Received: from flrtn-4-m1-156.vnnyca.adelphia.net ([24.55.69.156]:25984 "EHLO jyro.mirai.cx") by vger.kernel.org with ESMTP id ; Sun, 13 Jan 2002 02:19:43 -0500 Message-ID: <3C41350D.9070407@pobox.com> Date: Sat, 12 Jan 2002 23:19:41 -0800 From: J Sloan Organization: J S Concepts User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.7) Gecko/20011221 X-Accept-Language: en-us MIME-Version: 1.0 To: linux-kernel Subject: My end user testing of 2.4.8-ish kernels 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 I did some testing today on the mini-low-latency patch. I must admit that I was totally biased towards it from the start. While it certainly didn't hurt anything, the bottom line is that after hours of mp3/dbench tests, I was unable to quantify any real difference between 2.4.18-pre3 vanilla and with mini low latency. They exhibit pretty much the same behaviour in terms of how much dbench it takes to start hearing audio dropouts in xmms - they were both smooth up to dbench 40, but started exhibiting sporadic audio dropouts at dbench 64. Out of curiosity I booted up 2.4.18pre2-aa2 and found it a real gem. To my pleasant suprise I was able to run dbench 128 without hearing a _single_ audio dropout. (the dbench 128 result was 19.75 MB/sec) With dbench 192 I did start to hear some occasional dropouts, but they were generally short, e.g. 100ms or so. In any event, all the 2.4.18-pre-ish kernels I tested today are much better at this than e.g. 2.4.7 - at least on my hardware, I am now getting excellent interactive performance under load without preempt or low-latency patches, and that's a good thing. IMHO the -aa kernel seems to the clear winner here - Good for server use, good for desktop use... Regards jjs