From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266539AbUGPMta (ORCPT ); Fri, 16 Jul 2004 08:49:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266541AbUGPMta (ORCPT ); Fri, 16 Jul 2004 08:49:30 -0400 Received: from cantor.suse.de ([195.135.220.2]:59049 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S266539AbUGPMt3 (ORCPT ); Fri, 16 Jul 2004 08:49:29 -0400 Date: Fri, 16 Jul 2004 14:49:28 +0200 Message-ID: From: Takashi Iwai To: Florin Andrei Cc: linux-audio-dev@music.columbia.edu, linux-kernel@vger.kernel.org Subject: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch In-Reply-To: <1089953429.2631.3.camel@rivendell.home.local> References: <20040709182638.GA11310@elte.hu> <20040710222510.0593f4a4.akpm@osdl.org> <1089953429.2631.3.camel@rivendell.home.local> User-Agent: Wanderlust/2.10.1 (Watching The Wheels) SEMI/1.14.5 (Awara-Onsen) FLIM/1.14.5 (Demachiyanagi) APEL/10.6 MULE XEmacs/21.4 (patch 15) (Security Through Obscurity) (i386-suse-linux) MIME-Version: 1.0 (generated by SEMI 1.14.5 - "Awara-Onsen") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org At Thu, 15 Jul 2004 21:50:29 -0700, Florin Andrei wrote: > > On Sat, 2004-07-10 at 22:25, Andrew Morton wrote: > > > What we need to do is to encourage audio testers to use ALSA drivers, to > > enable CONFIG_SND_DEBUG in the kernel build and to set > > /proc/asound/*/*/xrun_debug and to send us the traces which result from > > underruns. > > Just out of curiosity: > If i enable CONFIG_SND_DEBUG when compiling the kernel, but do not set > /proc/*/xrun_debug, will that kernel be slower than without > CONFIG_SND_DEBUG turned on? XRUN is checked regardless with or without CONFIG_SND_DEBUG, so there is no difference in the performance. It will just print out messages at each XRUN. With debug option, some debug checks will be compiled in, but the impact to perfomance must be ignorable. Takashi