Florian Schmidt wrote: > On Sat, 15 Jan 2005 23:04:39 -0500 > Eric Dantan Rzewnicki <eric@xxxxxxxxxx> wrote: > do you compile it as "Preemptible Kernel (Low-Latency Desktop)" or as > "Complete Preemption (Real-Time)"? I went for Complete real-time on this build. > In the former case, just making all irq handlers threaded except for the > soundcard irq handler should give pretty good results already (also run > jack at a prio of 60 or 70 in this case). For this the "threaded irq > handlers" section on the page you quoted should be accurate. How do I set jackd's priority? > In the latter case all irq handlers are threaded by design, so in this > case you need to make sure that our soundcard irq is the highest prio > irq handler in the system. Make the soundcard irq handler sched_fifo > with prio 98 instead of unthreading it. I always have the keyboard irq > handler at prio 99, so magic sysrq works even in the worst cases (i > haven't seen negative effects on jack operation yet). There is a link on the wiki about setting irq priorities, but it seems to be broken. How do I set these? and how do I set SCHED_FIFO for an irq handler? > The other /proc and /sys stuff is mostly important for debugging. > Also when in doubt consult the help texts of the kernel configuration > options.. They should have the relevant info, too. Thanks Florian. I'll try building with the Pre-emptible, low-latency desktop option today as well. -ERic Rz.
