On Wednesday 31 January 2007 23:39, Lee Revell wrote:
> On 1/31/07, David Olofson <david@email-addr-hidden> wrote:
> > That said, as you can't use all CPU time on a UP machine anyway,
> > and
> > as cache issues seem to make multithreaded processing virtually
> > pointless (with the possible exception of multicore CPUs), it's
> > entirely possible that there is no real gain in cutting latencies
> > below what 2.6-rt can provide. I don't know, but it might be worth
> > some experiments...
>
> Maximum jitter with 2.6-rt is 20-50 microseconds last time I
> checked.
> So less than 5% even at a marginally useful period sizes like 32
> frames.
Well, that's not even an order of magnitude away from what you can get
with a "true" RTOS on this type of hardware. (You can get a lot worse
with crappy motherboards, regardless of OS...)
If that's really the worst case, I don't think there is room for any
significant improvement, even in theory. :-)
//David Olofson - Programmer, Composer, Open Source Advocate
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Received on Thu Feb 1 04:15:02 2007
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