From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: Re: Underrun on Jade controller... Date: Fri, 23 Nov 2012 11:09:02 +0100 Message-ID: <50AF4B3E.9050003@gmail.com> References: <1353665116.15462.YahooMailNeo@web120405.mail.ne1.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bk0-f51.google.com (mail-bk0-f51.google.com [209.85.214.51]) by alsa0.perex.cz (Postfix) with ESMTP id 559C82616F3 for ; Fri, 23 Nov 2012 11:09:05 +0100 (CET) Received: by mail-bk0-f51.google.com with SMTP id ik5so3565049bkc.38 for ; Fri, 23 Nov 2012 02:09:05 -0800 (PST) In-Reply-To: <1353665116.15462.YahooMailNeo@web120405.mail.ne1.yahoo.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Sandulescu Bogdan Cc: "alsa-devel@alsa-project.org" List-Id: alsa-devel@alsa-project.org On 23.11.2012 11:05, Sandulescu Bogdan wrote: > I'm an User-Space application developer, using the ALSA library to > play mixed sounds. My application (and for that matter also aplay) > are having one underrun problem, and I need help on how to interpret > the following debug information and receive some possible > workarounds/solutions. > > The underrun occurs only: once after writei() was performed with > get_buffer_size bytes written, and try to do another writei(). > > Target: Fujitsu Jade microcontroller > > ALSA: 1.0.25 > > ALSA PCM interface for Jade-xxsvideo: > /kernel/linux-2.6.31.4/sound/soc/xxsvideo/jade-pcm.c > > DMA driver: /kernel/linux-2.6.31.4/arch/arm/mach-xxsvideo/dma.c Neither the ARM platform code nor the ASoC parts are present in mainline. > Here are the traces I managed to do, if there is any other > information needed, please ask me for it. Without providing any code, I guess nobody on this list will be able to help you. Daniel