Subject: Re: [linux-audio-dev] OSS driver for rtlinux
From: Benno Senoner (sbenno_AT_gardena.net)
Date: Mon Jul 09 2001 - 17:12:49 EEST
David Olofson has done some testing on that field some tima ago
(the driver works only with ES1370 (AudioPCI) )
http://www.linuxdj.com/maia/audiality/download.html
But the key question is: do you really need 0.5msec latency for your app ?
What kind of apps are you working on ?
Josh Green has posted some latencytest graphs and his box seems able to
deliver 1.4msec latency under high load using (ALSA + lowlatency patches,
without the need of RTLinux).
PS: keep in mind that the PCI bus has some latency too (because transfers
always do occur in blocks and you cannot go below the PCI transfer size) so
probably the best you can achieve lies in the 0.x msec range. (Not sure if
you can achieve <0.5msec)
If you need more infos about how to setup a low latency machine, look at the
LinuxAudioDev site.
cheers,
Benno.
http://www.linuxaudiodev.org The Home of Linux Audio Development
On Monday 09 July 2001 12:11, Claire Troussier wrote:
> Hi,
>
> I would like to know if there is a simple way to port an OSS driver to
> rtlinux.
> In fact what I need is only to be sure that the interrupt latency is
> less than 500 µs, so may be it is possible to keep my OSS driver as it
> is and to only adapt the interrupt service routine ?
>
> Thanks for your help
>
>
> Claire
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