Hello,
I am trying to get low latency with alsa.
I have kernel 2.4.13 with the preemptive patch and the
alsa-driver/utils/patches/rtc-2.4.9.dif patch applied.
In the kernel configuration, I turned on RTC and
Preemptive.
I run the alsa-lib/test/latency.c test in poll mode,
but the problem is the
>I run the alsa-lib/test/latency.c test in poll mode,
>but the problem is the tick time, which is at 100 Hz:
>
>snd_pcm_hw_params_get_tick_time(params, NULL) = 1
>
>What am I doing wrong?
using poll mode and/or not making the RTC available as a timer via
Takashi's kernel patch.
--p
Hi Maarten,
At Tue, 6 Nov 2001 17:12:01 +0100,
Maarten de Boer wrote:
>
> Hello,
>
> I am trying to get low latency with alsa.
> I have kernel 2.4.13 with the preemptive patch and the
> alsa-driver/utils/patches/rtc-2.4.9.dif patch applied.
> In the kernel configuration, I turned on RTC and
> P
On Tue, 06 Nov 2001 11:40:30 -0500
Paul Davis <[EMAIL PROTECTED]> wrote:
> >I run the alsa-lib/test/latency.c test in poll mode,
> >but the problem is the tick time, which is at 100 Hz:
> >
> >snd_pcm_hw_params_get_tick_time(params, NULL) = 1
> >
> >What am I doing wrong?
>
> using poll mode
At Tue, 06 Nov 2001 19:10:20 +0100,
Abramo wrote:
>
> Takashi Iwai wrote:
> >
> > Hi Maarten,
> >
> > At Tue, 6 Nov 2001 17:12:01 +0100,
> > Maarten de Boer wrote:
> > >
> > > Hello,
> > >
> > > I am trying to get low latency with alsa.
> > > I have kernel 2.4.13 with the preemptive patch and t
Takashi Iwai wrote:
>
> Hi Maarten,
>
> At Tue, 6 Nov 2001 17:12:01 +0100,
> Maarten de Boer wrote:
> >
> > Hello,
> >
> > I am trying to get low latency with alsa.
> > I have kernel 2.4.13 with the preemptive patch and the
> > alsa-driver/utils/patches/rtc-2.4.9.dif patch applied.
> > In the ke
At Tue, 06 Nov 2001 19:34:05 +0100,
Abramo wrote:
>
> Takashi Iwai wrote:
> >
> > At Tue, 06 Nov 2001 19:10:20 +0100,
> > Abramo wrote:
> > >
> > > Takashi Iwai wrote:
> > > >
> > > > Hi Maarten,
> > > >
> > > > At Tue, 6 Nov 2001 17:12:01 +0100,
> > > > Maarten de Boer wrote:
> > > > >
> > > >
Takashi Iwai wrote:
>
> At Tue, 06 Nov 2001 19:10:20 +0100,
> Abramo wrote:
> >
> > Takashi Iwai wrote:
> > >
> > > Hi Maarten,
> > >
> > > At Tue, 6 Nov 2001 17:12:01 +0100,
> > > Maarten de Boer wrote:
> > > >
> > > > Hello,
> > > >
> > > > I am trying to get low latency with alsa.
> > > > I ha
Abramo Bagnara <[EMAIL PROTECTED]> wrote:
> This would not imply a "major" rewrite: the API and the kernel code has
> been thought for that.
> You need simply to have different snd_pcm_tick_set functions (see
> pcm_lib.c).
That's interesting. So you think that that would be the prefered way
to d
Takashi Iwai wrote:
>
> > I'm strongly against a module parameter for that.
> > We'd need an API call for tick source selection and a new ioctl, but I
> > don't like very much the sequencer API way, I'd prefer something like:
> >
> > timer_fd = open(timer);
> > pcm_fd = open(pcm);
> > ioctl(pcm_f
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