Re: Realtime Preemption - 2.6.12-final-RT-V0.7.50-35

[Chuck Harding <charding@llnl.gov>]

On Wed, 29 Jun 2005, Ingo Molnar wrote:

> * Chuck Harding <charding@llnl.gov> wrote:
>
> > still having sox hang with no messages about what is going on. I have
> > CONFIG_DEBUG_PREEMPT enabled. It did work without hanging for about 50
> > times of playing a sound file, so the problem seems to take a bit of
> > time to develop. What other info would you need to figure this out?
>
> could you chrt the sound IRQ thread to SCHED_OTHER (audio performance
> will suck, but it will be more debuggable) - when the lockup happens, do
> you see the IRQ thread looping? Do you have SOFTLOCKUP_DETECT turned on
> too?
>
> 	Ingo

Did that, the IRQ thread is not looping, it doesn't seem to be using any
CPU at all. And I do have SOFTLOCKUP_DETECT on.

(PS, I am subbed to the list so please, no need to CC me. Thanks)

--
Charles D. (Chuck) Harding <charding@llnl.gov>  Voice: 925-423-8879
Senior Computer Associate         ICCD            Fax: 925-423-6961
Lawrence Livermore National Laboratory      Computation Directorate
Livermore, CA USA  http://www.llnl.gov  GPG Public Key ID: B9EB6601
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