Re: [LAD] hard realtime performance synth

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From: <fons@...>
To: <linux-audio-dev@...>
Date: Tuesday, January 26, 2010 - 8:51 pm

On Tue, Jan 26, 2010 at 03:15:43PM -0500, David McClanahan wrote:

> 3. I'm a little worried about what some are calling realtime systems. The

That's not how Linux audio works. Processing is done in
blocks of typically between 64 and 1024 samples.

> The way things are now even with the "realtime kernel" on U. Studio. , xruns

With current kernels you don't even need any RT patches
to get good performance, unless you need very low latency
(i.e. very small block sizes). I've been working most of
the day on a 64-channel system with several quite complex
apps, and I haven't seen a single xrun. Standard unpatched
2.6.32 kernel.
If you get xruns on a correectly set-up system (and that
requires very little these days) it's probably because
the apps you use have not been written in the way required
to perform well in a realtime context. Unfortunately there
are many like that.

Ciao,

--
FA

O tu, che porte, correndo si ?
E guerra e morte !
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Messages in current thread:
[LAD] hard realtime performance synth, David McClanahan, (Sat Jan 23, 10:33 pm)
Re: [LAD] hard realtime performance synth, David McClanahan, (Tue Jan 26, 8:15 pm)
Re: [LAD] hard realtime performance synth, Jens M Andreasen, (Wed Jan 27, 8:40 am)
Re: [LAD] hard realtime performance synth, David Olofson, (Wed Jan 27, 1:48 am)
Re: [LAD] hard realtime performance synth, David McClanahan, (Thu Jan 28, 8:01 pm)
Re: [LAD] hard realtime performance synth, David Olofson, (Fri Jan 29, 1:32 am)
Re: [LAD] hard realtime performance synth, David McClanahan, (Fri Jan 29, 10:24 pm)
Re: [LAD] hard realtime performance synth, Gabriel M. Beddingfield, (Sat Jan 30, 5:37 am)
Re: [LAD] hard realtime performance synth, Paul Davis, (Sat Jan 30, 12:20 am)
Re: [LAD] hard realtime performance synth, Gabriel M. Beddingfield, (Thu Jan 28, 9:40 pm)
Re: [LAD] hard realtime performance synth, Folderol, (Thu Jan 28, 10:12 pm)
Re: [LAD] hard realtime performance synth, torbenh, (Thu Jan 28, 8:55 pm)
Re: [LAD] hard realtime performance synth, Louigi Verona, (Wed Jan 27, 1:51 am)
Re: [LAD] hard realtime performance synth, Louigi Verona, (Wed Jan 27, 1:34 am)
Re: [LAD] hard realtime performance synth, Stephen Sinclair, (Tue Jan 26, 9:48 pm)
Re: [LAD] hard realtime performance synth, David McClanahan, (Thu Jan 28, 6:55 pm)
Re: [LAD] hard realtime performance synth, Paul Davis, (Thu Jan 28, 7:56 pm)
Re: [LAD] hard realtime performance synth, David McClanahan, (Thu Jan 28, 8:07 pm)
Re: [LAD] hard realtime performance synth, , (Tue Jan 26, 8:51 pm)
Re: [LAD] hard realtime performance synth, Josh Lawrence, (Tue Jan 26, 8:39 pm)
Re: [LAD] hard realtime performance synth, Gabriel M. Beddingfield, (Sun Jan 24, 2:46 am)
Re: [LAD] hard realtime performance synth, Ray Rashif, (Sun Jan 24, 6:35 am)
Re: [LAD] hard realtime performance synth, Jens M Andreasen, (Sun Jan 24, 1:27 pm)
Re: [LAD] hard realtime performance synth, Louigi Verona, (Sun Jan 24, 2:46 pm)
Re: [LAD] hard realtime performance synth, Jens M Andreasen, (Sun Jan 24, 3:06 pm)
Re: [LAD] hard realtime performance synth, Victor Lazzarini, (Mon Jan 25, 6:16 pm)
Re: [LAD] hard realtime performance synth, Jens M Andreasen, (Mon Jan 25, 5:17 pm)
Re: [LAD] hard realtime performance synth, Gene Heskett, (Mon Jan 25, 6:32 pm)
Re: [LAD] hard realtime performance synth, Jens M Andreasen, (Mon Jan 25, 6:09 pm)