Subject: Re: [linux-audio-dev] protux, stereo and interleaving
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Fri Feb 09 2001 - 14:42:11 EET
On Fri, Feb 09, 2001 at 12:36:21PM +0000, Iain Sandoe wrote:
> Hi Steve!
Hi Iain, still getting deafening silence from Korg ;) I went RME in the
end, so now I have more adat i/o than I know what to do with anyway.
> On Fri, Feb 09, 2001, Steve Harris wrote:
> > Also, I think you are better off (if you can) running small loops
> > over each channel in series, rather than a more complicated loop over
> > serveral channels at once - less cache polution.
>
> That depends on how you code multi-channel functionality.
>
> If you know, a priori, that you are dealing with a "stereo" process and have
> a simd machine it might pay to feed the samples in cross-wise blocks -
> keeping all execution units busy with the same instruction.
>
> This (for some of my applications) might become more acute (I have in mind
> scientific applications where I might have, say, 8 channels all considered
> and processed as a group).
Good point, but this is still slightly antisocial behaviour, course it
doesn't matter if you are the only important process running.
- Steve
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