> For sure, if there are system states where the periodic tasks do not
> have to run, calling rt_task_set_periodic(..., TM_INFINITE) will help
to
> reduce unneeded load.

That's what I thought.

> I bet the overhead was not measurable because everything lived in
kernel
> space, right?

It was negligible, but I don't know for certain if that's because it was
in kernel space. It seems to be the case, though. 
 
> Keep another advantage in mind: going to user space allows you (or
your
> contractor) to distribute closed-source applications without
consulting
> costly lawyers - if that can help at all... :)

The source code is distributed with each unit. On bad sectors of a flash
card. But hey, it's there.

I'm going out of town but will return next week. I'll be thinking about
the design and share some ideas with you all. I will also go kernel
fault hunting for Philippe now that I know what he wants. I appreciate
everyone's help and feel bad that at this juncture I have to disappear
for a while. I can tell that you're all anxious to help figure out
what's going on so we (you) can make Xenomai a wonderful project that
leads to peace on earth and clean energy. ;)

Steven


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