From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0001538]: Latency was better on earlier version Date: Thu, 10 Nov 2005 21:55:17 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [85.132.177.35]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id 7D4BF1D9 for ; Thu, 10 Nov 2005 21:55:17 +0100 (MET) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: pesalomo Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1538 Category: PCI - intel8x0 Reproducibility: always Severity: major Priority: normal Status: new Distribution: Gentoo Linux Kernel Version: 2.6.14 ====================================================================== Date Submitted: 11-09-2005 21:01 CET Last Modified: 11-10-2005 21:55 CET ====================================================================== Summary: Latency was better on earlier version Description: I don't know what category which is best for this - but I'm comparing Linux kernel 2.6.10 and 2.6.14. Using I82801DBICH4, version 1.0.10rc1, which is bundled with Linux 2.6.14 - the performance is much weaker than when using kernel 2.6.10 (don't remember the driver version there). On 2.6.10 I was able to use a buffer size down to 128 bytes, but now the lowest I can go is 512. And the sound is still crispy. ====================================================================== ---------------------------------------------------------------------- Clemens Ladisch - 11-10-05 21:11 ---------------------------------------------------------------------- I wanted to see the beginning of the output. But the "avail" values show that the buffer has a size of 64 frames. ---------------------------------------------------------------------- pesalomo - 11-10-05 21:55 ---------------------------------------------------------------------- aplay -D hw:0 -v --period-size=32 --buffer-size=64 -t raw -f dat /dev/zero Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo Hardware PCM card 0 'Intel 82801DB-ICH4' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 64 period_size : 32 period_time : 666 tick_time : 4000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 32 xfer_align : 32 start_threshold : 64 stop_threshold : 64 silence_threshold: 0 silence_size : 0 boundary : 1073741824 underrun!!! (at least 8.179 ms long) Status: state : XRUN trigger_time: 1131656091.89497000 tstamp : 1131656091.97657000 delay : 0 avail : 64 avail_max : 64 underrun!!! (at least 18.193 ms long) Status: state : XRUN trigger_time: 1131656091.113515000 tstamp : 1131656091.131707000 delay : 0 avail : 64 avail_max : 64 underrun!!! (at least 0.243 ms long) Issue History Date Modified Username Field Change ====================================================================== 11-09-05 21:01 pesalomo New Issue 11-09-05 21:01 pesalomo Distribution => Gentoo Linux 11-09-05 21:01 pesalomo Kernel Version => 2.6.14 11-09-05 21:02 pesalomo Issue Monitored: pesalomo 11-10-05 08:57 Clemens LadischNote Added: 0006660 11-10-05 19:11 pesalomo Note Added: 0006668 11-10-05 21:11 Clemens LadischNote Added: 0006671 11-10-05 21:55 pesalomo Note Added: 0006673 ====================================================================== ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php