NetBSD Problem Report #53028

From www@NetBSD.org  Wed Feb 14 14:12:56 2018
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Date: Wed, 14 Feb 2018 14:12:55 +0000 (UTC)
From: coypu@sdf.org
Reply-To: coypu@sdf.org
To: gnats-bugs@NetBSD.org
Subject: hdaudio default latency too high, mpv spins at 100% CPU playing audio
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>Number:         53028
>Category:       kern
>Synopsis:       hdaudio default latency too high, mpv spins at 100% CPU playing audio
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    isaki
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 14 14:15:00 +0000 2018
>Closed-Date:    Thu Jun 20 12:52:21 +0000 2019
>Last-Modified:  Thu Jun 20 12:52:21 +0000 2019
>Originator:     coypu
>Release:        NetBSD 8.99.12
>Organization:
>Environment:
NetBSD planets 8.99.12 NetBSD 8.99.12 (GENERIC) #0: Thu Feb  8 00:38:03 IST 2018  fly@planets:/usr/src/sys/arch/amd64/compile/GENERIC amd64

>Description:
playing s32 audio on mpv, it spins the CPU at 100%.

hdaudio0 at pci0 dev 27 function 0: HD Audio Controller
hdaudio0: interrupting at msi0 vec 0
hdafg0 at hdaudio0: vendor 111d product 7605
hdafg0: DAC00 2ch: Speaker [Built-In], HP Out [Jack]
hdafg0: ADC01 2ch: Mic In [Jack]
hdafg0: ADC02 2ch: Mic In [Built-In]
hdafg0: 2ch/2ch 44100Hz 48000Hz 88200Hz 96000Hz 192000Hz PCM16 PCM20 PCM24 AC3
audio0 at hdafg0: full duplex, playback, capture, mmap, independent
hdafg0: Virtual format configured - Format SLINEAR, precision 16, channels 2, frequency 48000
hdafg0: Latency: 128 milliseconds

>How-To-Repeat:

>Fix:
from nat@:

using:
- lowering hw.hdafg0.latency a lot

or,
- mpv --audio-format=s16

fixes the problem.

>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: kern-bug-people->isaki
Responsible-Changed-By: isaki@NetBSD.org
Responsible-Changed-When: Thu, 31 Jan 2019 14:03:39 +0000
Responsible-Changed-Why:
I take it.


From: Tetsuya Isaki <isaki@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc: kern-bug-people@netbsd.org,
	gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/53028: hdaudio default latency too high, mpv spins at 100% CPU playing audio
Date: Thu, 31 Jan 2019 23:03:06 +0900

 mpv issue is fixed at src/lib/libossaudio/ossaudio.c,v 1.35
 and submitter confirmed it.

 I also take the latency issue.
 ---
 Tetsuya Isaki <isaki@pastel-flower.jp / isaki@NetBSD.org>

From: matthew green <mrg@eterna.com.au>
To: Tetsuya Isaki <isaki@NetBSD.org>
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
    netbsd-bugs@netbsd.org, gnats-bugs@NetBSD.org
Subject: re: kern/53028: hdaudio default latency too high, mpv spins at 100% CPU playing audio
Date: Fri, 01 Feb 2019 20:48:03 +1100

 Tetsuya Isaki writes:
 > mpv issue is fixed at src/lib/libossaudio/ossaudio.c,v 1.35
 > and submitter confirmed it.
 > 
 > I also take the latency issue.

 thanks!  i've also confirmed it helps my setup.  actually, i've
 applied the fix to netbsd-8 and tested there.


 .mrg.

From: Tetsuya Isaki <isaki@pastel-flower.jp>
To: matthew green <mrg@eterna.com.au>
Cc: kern-bug-people@netbsd.org,
	gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org,
	gnats-bugs@NetBSD.org
Subject: Re: kern/53028: hdaudio default latency too high, mpv spins at 100% CPU playing audio
Date: Sat, 09 Feb 2019 14:17:17 +0900

 At Fri, 01 Feb 2019 20:48:03 +1100,
 matthew green wrote:
 > > mpv issue is fixed at src/lib/libossaudio/ossaudio.c,v 1.35
 > > and submitter confirmed it.
 >
 > thanks!  i've also confirmed it helps my setup.  actually, i've
 > applied the fix to netbsd-8 and tested there.

 Thank you.  I sent pullup request.
 ---
 Tetsuya Isaki <isaki@pastel-flower.jp / isaki@NetBSD.org>

State-Changed-From-To: open->closed
State-Changed-By: isaki@NetBSD.org
State-Changed-When: Thu, 20 Jun 2019 12:52:21 +0000
State-Changed-Why:
The audio implementation was completely changed.
Previous latency issue is gone.


>Unformatted:

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