Messages in this thread | | | Date | Wed, 15 Sep 2004 11:35:31 +0100 (WEST) | Subject | Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R5 | From | "Rui Nuno Capela" <> |
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Ingo Molnar wrote: > >Rui Nuno Capela wrote: > >> Yes, I didn't mentioned that, but I do have provided it and assumed on >> all my reported trials: >> >> echo 0 > "/proc/irq/8/rtc/threaded" >> echo 0 > "/proc/irq/17/Intel ICH5/threaded" >> >> Thanks. > > weird. You shouldnt get any xruns - unless jackd for whatever reason > doesnt truly run under RT priorities. (there was some NPTL related > buglet that caused such a symptom in earlier jackd versions.) >
I thought it has been ironed out here.
Note that the difference arises only whether softirq-preempt and hardirq-preempt are enabled or not.
- with softirq-preempt=0 and hardirq-preempt=0, jackd realtime runs perfectly, as advertised (jackd -R -p 128 -n 2), and sounds good too ;)
- with softirq-preempt=1 and hardirq-preempt=1, the XRUN storm is terribly annoying. And sound is obviously a crackling festival.
Remember, that all this is on same hardware, same smp kernel configuration (CONFIG_SCHED_SMT is not set), same everything else (SuSE 9.1, NPTL 0.61, jack-0.98.11cvs).
I hope the latency-traces show something useful. Til then...
Take care. -- rncbc aka Rui Nuno Capela rncbc@rncbc.org
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