[pulseaudio-discuss] Why tsched disabled when I use module-alsa-sink with 'mmap=0 tsched=1' parameters?

[Raymond Yau]

2014-12-22 上午8:04 於 "김정연" <see2002 at gmail.com> 寫道：
>
> > > It seems tsched is allowed only mmap supported ALSA devices. Why
tsched
> > disabled while use non-mmap driven ALSA?
> Yes.
>
> >
> > Do you meam irq mode not working well ?
> >
> My card working well in irq mode too. It is no problem. But I couldn't
use tsched mode actually due to rejecting by pulseaudio. But I just
couldn't understand why rejected on non-mmap mode.

http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/tests/alsa-time-test.c

Do your sound card work with fillrate less than period size ?

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa-util.c?id=045c1d602dcba57868845ba3270510593c39480f

+   if (!_use_mmap)
+        _use_tsched = FALSE;
+

You need to ask the author since it was there since gitch free mode
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