Messages in this thread | | | Date | Wed, 27 Oct 2004 16:26:03 +0100 (WEST) | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4 | From | "Rui Nuno Capela" <> |
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Ingo Molnar wrote: > > Rui Nuno Capela wrote: > >> OK. Currently with RT-V0.3.2. >> >> So it seems that the jackd -R is no more an issue here. > > great. > >> However (oh no!:) those jackd -R xruns are still frequent, much >> frequent than RT-U3, which is my stable RT kernel atm. > > -V0.4.1 could help with this problem. There were a number of places > where the PREEMPT_REALTIME kernel missed reschedules so it could easily > happen that jackd would sit in the runqueue waiting to be executed and > the kernel got quickly out of a critical section but then the kernel > 'forgot' to reschedule for many milliseconds! >
On RT-V0.4.1, xruns seems slighly reduced, but plenty enough for my taste.
Running jackd -R with 6 fluidsynth instances gives me 0 (zero) xruns on RT-U3, but more than 20 (twenty) on RT-V0.4.1, under a 5 minute time frame. It was 30 (thirty something) on RT-V0.4, but overall "feel" is about the same.
Cheers. -- rncbc aka Rui Nuno Capela rncbc@rncbc.org
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