[alsa-devel] Testing/forcing XRUN

Eliot Blennerhassett linux at audioscience.com
Fri Jun 8 07:59:05 CEST 2007


I want to test my driver behaviour when an xrun happens.

I have tried using aplay/arecord, and suspending (ctrl-Z) them while 
playing/recording but this doesn't have the desired effect. (I don't see my 
driver code detecting an xrun).  Instead I see a trigger-stop command to the 

The apps do report an overrun when they are restarted though.

Can anyone answer these:

1) Is this a valid way to simulate an xrun due to application not keeping up?

1.1) If not, what is? Do I have to write an app that deliberately starves the 

2) Where is the xrun being detected if my driver doesnt see it?  Where does 
the trigger-stop command come from when I suspend the app?


Eliot Blennerhassett
AudioScience Inc.

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