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

Ingo Molnar
2004-10-29T14:38:20Z

* Paul Davis <paul@linuxaudiosystems.com> 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@2.533Ghz 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