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SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4

* Florian Schmidt <mista.tapas@gmx.net> wrote:

> Here's some setup info:
>
> ksoftirqd/0:
> mango:~# chrt -p 2
> pid 2's current scheduling policy: SCHED_FIFO
> pid 2's current scheduling priority: 99

dont do this ... ksoftirqd can spend alot of time processing various
stuff and it should not be relevant to the audio path. It should be
SCHED_OTHER.

> Hmm, it seems i haven't disabled all debugging. This is from dmesg:
>
> BUG: atomic counter underflow at:
> [<c010649e>] dump_stack+0x1e/0x20 (20)
> [<c025f319>] qdisc_destroy+0xd9/0xe0 (28)

this is automatic and doesnt introduce alot of overhead (unless the
printout happens while you are testing latencies). You can remove the
WARN_ON from include/asm-i386/atomic.h.

Ingo
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