Hi everyone,
I'm using Xenomai to develop a real time control system with educational
purposes. The idea is to show how a control system is affected by other
tasks and how a real time approach will help to sustain his execution
over other threads. To do this, I have a program with a control thread
(used to control the position and velocity of a DC motor) and other one
that consist in a for loop wich allow to change the execution time of
this thread and see the effect on the control. I'm executing this on a
i7 processor and I would like to know a couple of things, and hopefully
you could help me with some advice.
- Is there a way to get the information about the times related with the
tasks? I mean I would like to draw a classic execution time line to
explain the effect on the control thread with real data. This means
having the release time, when a task is suspended and reactivated, etc.
because sometimes I can see the degradation in the control performance
but other times don't, even with the same conditions and to explain the
fenomena this would be very helpful. I know that maybe this issue isn't
so related with the purpose of this mail list but If you have some idea
on how to do this, if is feasible to do it, or if Xenomai have some logs
or something to get this data will be preciated.
- I also would like to know if there is a way to assign the execution of
a thread to a specific CPU and, for instance, force the execution of
both threads in the same CPU. Or a least to know if there is a way to
confirm that the threads are allocated in the same CPU.
Sorry if this is not the place to find some answers to this questions
and thank you for your time and any reply you could gave me.
Sebastián Pavez.
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