On Friday 11 November 2005 09:13 am, Florian Schmidt wrote: would this help my jackd run more smoothly? (now i have lots of interruptions while playing midis) > On Thu, 10 Nov 2005 20:03:59 -0800 > > Mark Knecht <markknecht@xxxxxxxxx> wrote: > > jackd -R -p 64 -d alsa -r 44100 -p 64 -n2 -d hw:1,0 > > jackd -R -P 70 ... > > to set the priority of jackd higher than all soundcard irq handlers > besides the soundcard irq. > > Basically the priority setup should look something like this: > > keyboard irq handler - 99 > rtc irq handler - 99 > soundcard irq handler - 98 > > jackd prio - 70 (creates watchdog at prio 80 and client > process() threads at prio 69) > > all other irq handlers - around 50 (default) > > Basically there's also some problems with the timer irq's on -rt kernels > (which my rt watchdog suffers from). Usually you would want to set > softirq-timer and softirq-ktime to high prios, too (so high prio > sleeping threads preempt low prio running threads when getting woken up. > Actually this should make sure that the timer interrupt which wakes up > the high prio thread after its sleep actually gets to run), but this > doesn't quite work with the kernels i tested (this is the reason why my > rt_watchdog doesn't work right). > > I'll try with newer kernels and ask ingo about it if the problem > persists. Anyways, this should really only be a problem with midi > sequencers that are sleep based. When using an irq source for timing > this problem should go away. > > Regards, > Flo __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
