Subject: Re: [linux-audio-user] ALSA PCM OSS layer -> high latencies?
From: CLOTILDE (guy.clotilde_AT_wanadoo.fr)
Date: Mon Sep 24 2001 - 11:52:34 EEST
hi
wait a minute. I got a yamaha DS-XG too and have some latency problems. I'm using asla OSS-emulation . K Vehmanen says that there's not significant ltency differnce between OSS-emultation and native alsa.
But you say that the alsa driver is not better than the one in the kernel??? What kernel and what distro do you use?
On Sun, 23 Sep 2001 22:10:07 +1000
Andre Pang <ozone_AT_algorithm.com.au> wrote:
> Hi all,
>
> With some major help from some real kernel gurus, I finally
> tracked down why I was getting _huge_ latencies in (Benno
> Senoner's) latencytest.
>
> I was using ALSA's snd-card-ymfpci driver for my YMF744B chip and
> had latencytest running using ALSA's OSS PCM emulation. Since
> switching from that driver to the ymfpci driver that comes with
> the kernel, my latencies went down from an average of 15ms to 3ms.
> My latency spikes, which used to be over 30ms, are now around
> 8-10ms.
>
> Of course, I can't be sure whether the source of latency is from
> the snd-card-ymfpci driver or from snd-pcm-oss, but I'd guess it's
> the latter. Anyone want to do some benchmarking? I've done
> enough to last me the next two years, I think :).
>
> Whoever's maintaining the low-latency-mini-HOWTO might want to
> mention this ... it drove me nuts for weeks :). Hope this has
> been useful to somebody!
>
>
> --
> #ozone/algorithm <ozone_AT_algorithm.com.au> - trust.in.love.to.save
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