2 Nov
2010
2 Nov
'10
6:17 p.m.
Paul Davis wrote:
Ah, so no magic bullet then! %) This makes sense. Thanks for your response.
- Michael Ost
On Tue, Nov 2, 2010 at 12:53 PM, Michael Ost
<most(a)museresearch.com> wrote:
> Hi list,
>
> I am seeing what appears to be a 4 - 7 usec context switch time on a 3 GHz
> Core 2 Duo machine with the 2.6 kernel, and 10 - 15 usecs on a 1.66 GHz
> Atom. Is that reasonable? Does anyone have any tips on how to speed that up,
> if possible?
<snip>
Since this has
to happen twice per buffer, at a 32 sample buffer size and
with 10 VSTs, overhead accounts for about 14% of the CPU. On the slower Atom
machine, it would account for 33% of the CPU.
you can't reduce context switch times. the code involved is in the kernel.
it is precisely this problem that led to FST, and the more general use
of FST by ardour (for example) where rather than going back and forth
between wine and the linux app, the linux app becomes a wine process
itself, and everything is in-process.