Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]

[Ingo Molnar]

* Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote:

>      (c) the audio interface doesn't interrupt independently for
>                capture and playback. Rui will need to get back
> 	       to me with details on what type of audio interface
> 	       he is using for me to comment on this. If its
> 	       a consumer device with poor support for full
> 	       duplex operation, then it can happen that
> 	       capture and playback streams are running out
> 	       of sync and this can cause some odd timing.

here's Rui's setup:

| Note: all tests were carried out running jackd -v -dalsa -dhw:0 
| -r44100 -p128 -n2 -S -P, loaded with 9 (nine) fluidsynth instances,
| on a P4@xxxxxxxx laptop, against the onboard sound device 
| (snd-ali5451).

i suspect this means there was playback only, no capture, and thus the 
capture/playback interrupt interaction cannot be the case, right?

	Ingo
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