[alsa-devel] Help debugging a sound problem

[Arnaud Mouiche]

Hmm, doesn't look like an audio related issue at all.

If I have to bet, I would say something like "time required to load 
application/library pages from the filesystem"
How is mounted you root filesystem ?
What is the memory pressure ?
You should look at /proc/PID/smaps and compare the content BEFORE and AFTER.

good luck :)
Arnaud

On 13/03/2017 07:43, Jorge Fernandez Monteagudo wrote:
> Hi all,
>
>
> This is my first email to the list. I've joined to it because I don't know where to look for help.
>
>
> We have a iMX6 (ARM) board with a STA559BW audio codec connected by the I2S interface.
>
> We are using a 3.14.52 kernel with a custom sta559 codec driver based on the TAS5709 codec
>
> driver. Our system has the alsa library 1.0.28. Our application uses SDL 1.2.15 to handle the sound
>
> system.
>
>
> When we run the application the sound system works ok, but when we leave the application running
>
> without playing any sound for one night then next morning we found the sound is delayed more or less
>
> one second from when the sound is played until the sound it's heard. Traces in the SDL audiocallback
>
> are ok, the same as when the sound is played ok.
>
>
> Another clue. An 'aplay' executed in another console is played ok with no delay.
>
>
> Another one. If the application process is attached with gdb and then deattached then the sounds works
>
> ok again!
>
>
> Any help is welcome in order to begin to debug this situation.
>
>
> Thanks!
>
> Jorge
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