Re: possible bug in RP kernel

[Florian Schmidt]

On Mon, 12 Sep 2005 11:01:15 +0200
Ingo Molnar <mingo@xxxxxxx> wrote:

> > 23 seconds gap between two wakeups
> > 
> > Maybe my understanding of how sched fifo works is wrong, but i assumed 
> > a higher prio thread shold get woken up from a sleep by the scheduler 
> > which gets run by the timer interrupt [which is still non 
> > preemptible].
> 
> depending on what type of timeout you are using you'll also need to chrt 
> the softirq-timer kernel thread(s) to prio 99. Otherwise the timer fn 
> will have no chance to be executed. There's work going on by Thomas to 
> make such things automatic, by prioritizing timers. If you have HRT 
> enabled in the .config then it should mostly be automatic already 
> though.

Ah,

thanks for the info. So it is a user (me) bug in the end :) This has
helped. Actually the code i had attached had another bug in it. But that
wasn't the responsible one.

Thanks again, and sorry for the multiple mails,
Florian Schmidt

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