On Wednesday 31 January 2007 23:39, Lee Revell wrote: > On 1/31/07, David Olofson <[EMAIL PROTECTED]> 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 .------- http://olofson.net - Games, SDL examples -------. | http://zeespace.net - 2.5D rendering engine | | http://audiality.org - Music/audio engine | | http://eel.olofson.net - Real time scripting | '-- http://www.reologica.se - Rheology instrumentation --'
