[pulseaudio-discuss] alignment trap and pulseaudio being kiled

[Baek Chang]

It seems to be related to mono to stereo remapping, or the upsampling, I am
playing a mono 16kHz file repeatedly, and sometimes the error occurs.

I: client.c: Created 12 "Native client (UNIX socket client)"
D: protocol-native.c: Protocol version: remote 19, local 19
I: protocol-native.c: Got credentials: uid=0 gid=0 success=1
D: protocol-native.c: SHM possible: yes
D: protocol-native.c: Negotiated SHM: no
D: module-palm-policy.c: found virtual sink index on virtual sink 4, name
pmedia, index 4
D: module-suspend-on-idle.c: Sink pcm_output becomes busy.
D: resampler.c: Channel matrix:
D: resampler.c:        I00
D: resampler.c:     +------
D: resampler.c: O00 | 1.000
D: resampler.c: O01 | 1.000
I: remap.c: Using mono to stereo remapping
I: resampler.c: Using resampler 'ffmpeg'
I: resampler.c: Using s16le as working format.
D: memblockq.c: memblockq requested: maxlength=33554432, tlength=0, base=4,
prebuf=0, minreq=1 maxrewind=0
D: memblockq.c: memblockq sanitized: maxlength=33554432, tlength=33554432,
base=4, prebuf=0, minreq=4 maxrewind=0
I: sink-input.c: Created input 11 "GST Playback Stream" on pcm_output with
sample spec s16le 1ch 16000Hz and channel map mono
I: sink-input.c:     media.name = "GST Playback Stream"
I: sink-input.c:     application.name = "gst-launch-0.10"
I: sink-input.c:     native-protocol.peer = "UNIX socket client"
I: sink-input.c:     native-protocol.version = "19"
I: sink-input.c:     application.process.id = "10626"
I: sink-input.c:     application.process.user = "root"
I: sink-input.c:     application.process.host = "palm-webos"
I: sink-input.c:     application.process.binary = "gst-launch-0.10"
I: sink-input.c:     application.language = "C"
I: sink-input.c:     application.process.machine_id = "palm-webos"
I: protocol-native.c: Requested tlength=200.00 ms, minreq=10.00 ms
D: protocol-native.c: Adjust latency mode enabled, configuring sink latency
to half of overall latency.
D: memblockq.c: memblockq requested: maxlength=4194304, tlength=4660,
base=2, prebuf=0, minreq=320 maxrewind=0
D: memblockq.c: memblockq sanitized: maxlength=4194304, tlength=4660,
base=2, prebuf=0, minreq=320 maxrewind=0
I: protocol-native.c: Final latency 200.05 ms = 125.62 ms + 2*10.00 ms +
54.42 ms
D: sink-input.c: Requesting rewind due to uncorking
D: alsa-sink.c: Requested to rewind 9600 bytes.
D: alsa-sink.c: Limited to 9344 bytes.
D: alsa-sink.c: before: 2336
D: alsa-sink.c: after: 2336
D: alsa-sink.c: Rewound 9344 bytes.
D: sink.c: Processing rewind...
D: source.c: Processing rewind...


On Mon, Apr 4, 2011 at 11:45 AM, Baek Chang <baeksan at ccrma.stanford.edu>wrote:

> Hi,
>
> Trying to debug pulseaudio 0.9.22 and I am seeing some alignment trap
> warnings from kernel
>
> [ 1564.095562] Alignment trap: alsa-sink (5580) PC=0x2ab2ca3c
> Instr=0xe1ca00d0 Address=0x2af9302a FSR 0x011
> [ 1564.095597] Alignment trap: alsa-sink (5580) PC=0x2ab2ca68
> Instr=0xe0ca00f8 Address=0x2af9302a FSR 0x811
> [ 1564.113377] Alignment trap: alsa-sink (5580) PC=0x2ab2ca3c
> Instr=0xe1ca00d0 Address=0x2af93032 FSR 0x011
> [ 1564.122811] Alignment trap: alsa-sink (5580) PC=0x2ab2ca68
> Instr=0xe0ca00f8 Address=0x2af93032 FSR 0x811
> [ 1564.132240] Alignment trap: alsa-sink (5580) PC=0x2ab2ca3c
> Instr=0xe1ca00d0 Address=0x2af9303a FSR 0x011
> [ 1564.141703] Alignment trap: alsa-sink (5580) PC=0x2ab2ca68
> Instr=0xe0ca00f8 Address=0x2af9303a FSR 0x811
> [ 1564.151195] Alignment trap: alsa-sink (5580) PC=0x2ab2ca3c
> Instr=0xe1ca00d0 Address=0x2af93042 FSR 0x011
> [ 1564.160625] Alignment trap: alsa-sink (5580) PC=0x2ab2ca68
> Instr=0xe0ca00f8 Address=0x2af93042 FSR 0x811
> [ 1564.170065] Alignment trap: alsa-sink (5580) PC=0x2ab2ca3c
> Instr=0xe1ca00d0 Address=0x2af9304a FSR 0x011
>
> I tried connecting to gdb and reproducing the issue, the problem is that
> pulseaudio doesn't crash, but eventually terminates.
> Any ideas on how to debug this?
>
> Thanks
> Baek
>



-- 
-baeksanchang
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