From: bugtrack@alsa-project.org
To: alsa-devel@alsa-project.org
Subject: [ALSA - driver 0001538]: Latency was better on earlier version
Date: Thu, 10 Nov 2005 21:55:17 +0100 [thread overview]
Message-ID: <e8465e32f8ac01bcc00cb2b1b9826858@bugtrack.alsa-project.org> (raw)
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1538>
======================================================================
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
======================================================================
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next reply other threads:[~2005-11-10 20:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-10 20:55 bugtrack [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-11-23 16:23 [ALSA - driver 0001538]: Latency was better on earlier version bugtrack
2005-11-22 15:18 bugtrack
2005-11-10 20:11 bugtrack
2005-11-10 18:11 bugtrack
2005-11-10 7:57 bugtrack
2005-11-09 20:01 bugtrack
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