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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