Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch

Paul Davis
2004-07-13T00:02:51Z

>OK, thanks. The problem areas there are the timer-based route cache
>flushing and reiserfs.
>
>We can probably fix the route caceh thing by rescheduling the timer after
>having handled 1000 routes or whatever, although I do wonder if this is a
>thing we really need to bother about - what else was that machine up to?

i have one concern about this that i talked to takashi about when we
were in bordeaux. it seems to me that the ALSA xrun debug stuff is
measuring things when the interrupt handler for the ALSA device
executes and detects an xrun. if the handler itself was delayed, then
the stack trace for its execution doesn't or might not show what
caused the delay. this means, perhaps, that we need to be rather
careful interpreting these traces.

--p