Re: [Xenomai-help] Xenomai and futexes - Native API optimized for

["M. Koehrer" <mathias_koehrer@domain.hid>]

Hi Jan,
 
primarily I want to execute my simulation models as fast as possible. This is, I want 
to optimize the average execution time. As there are a series of critical sections to
be passed this should also have an impact on the worst execution time.

The critical region in the simulation are at locations when a lower prio thread and a higher
prio thread access the same data. This happens at a couple of times within a simulation step 
(within that critical region there are typically some copy operations).
However, once the higher prio thread has entered one critical region it is sure (at least if
both threads run on the same CPU core) that it will be able to enter the next critical region without
waiting.
That means, that improving the average runtime should also help to improve the worst case
runtime of the highest prio thread.

Regards

Mathias
> 
> Your analysis is not wrong. But before going into any detail may I ask
> you for on clarification: What do you want to optimise *primarily*, the
> average execution time of your RT threads in order to gain more CPU time
> for non-RT Linux jobs *or* the worst case execution time of your RT
> threads?
> 


-- 
Mathias Koehrer
mathias_koehrer@domain.hid


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