From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755640Ab0IPSsx (ORCPT ); Thu, 16 Sep 2010 14:48:53 -0400 Received: from hemera.binary-island.eu ([97.107.138.233]:33015 "EHLO hemera.binary-island.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754070Ab0IPSsw (ORCPT ); Thu, 16 Sep 2010 14:48:52 -0400 From: Matthias Dahl To: Linux Kernel Mailing List Subject: Re: [PATCH] sched: Improve latencies under load by decreasing minimum Date: Thu, 16 Sep 2010 20:48:50 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.35.4; KDE/4.5.1; x86_64; ; ) Cc: Ingo Molnar , Linus Torvalds , mathieu.desnoyers@efficios.com MIME-Version: 1.0 Message-Id: <201009162048.50941.ml_kernel@mortal-soul.de> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi. I don't know if this is relevant but I just tried this ontop 2.6.35.4 while investigating a different problem and it was quite easy to produce audio buffer underruns while doing some compile job in the background. To be exact: I had vlc (1.1 git) play back several flac files and was compiling qt 4.7 in the background as a test w/ -j5 on an i7 860 . The result was that w/ the decreased granularity it caused noticeable audio buffer underruns while it worked just fine w/ the default granularity (nothing else touched). Just wanted to report this early on and hope it helps. So long, matthias. PS. Please cc' as I am not subscribed. Thanks a lot.