Michael,
as far as I am aware that is in the code, but obviously somewhere is a slip
up.

j.


On Fri, Sep 14, 2012 at 8:15 AM, Michael Haberler <mai...@mah.priv.at>wrote:

>
> Am 14.09.2012 um 06:30 schrieb Kent A. Reed:
>
> > With the RT PREEMPT system, this board gives lousy results even running
> > headless. Using latency-test, for some minutes I see the base (25us)
> > thread showing a max latency of anywhere from 25us to 40us and the servo
> > (1000us) thread 40us to 50us. Then, the servo thread pops a bit and the
> > base thread pops a lot, to about 110us. At the same time, the kernel
> > throws three lines to the console
> >
> > "ERROR: Missed scheduling deadline for task 0 [nnnn times]
> > "Now is xxxxx.xxx, deadline is xxxxx.xxx
> > "Absolute number of pagefaults in realtime context: 1030"
>
> I guess this could be mitigated by pre-page faulting all RT code into
> memory
>
> this example deals with the issue:
> https://rt.wiki.kernel.org/index.php/Threaded_RT-application_with_memory_locking_and_stack_handling_example
>
> Lars: you also hinted at that - how did you do it?
>
> -m
>
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