Zaimin Zhong ([EMAIL PROTECTED]) wrote:
> Michael,
>
> Thank you!
>
> 1. Did you notice the answer of Ivan? ----He solved the problem by logging
> execution time in a RTFifo. I tried logging the execution time use a static
> variable, and then check it as YOU did in the RTL cheduling accuracy
> measuring example ( example/measurements/rt_process.c). How do you think
> about it?
It depends on what you want to do. If you just need the statistics,
logging is fine. A higher-priority thread running in sync with the main
thread will also allow things like stopping or killing the main thread
if it does not complete computation or takes too much time etc.
> 2. In rtl_time.h there is a function:
> int rtl_setclockhandler (clockid_t h, clock_irq_handler_t fn);
> Can I append a handler to the clock with the this function (or with
> rtl_request_irq() ) after having set up the clock.
Not yet. What are you trying to accomplish?
Michael.
>
> James...
>
>
> >The simplest way seems to be to create a higher-priority thread with the
> same
> >period and an offset in start time. The thread would check if the original
> >thread's computation is completed. It can also suspend or kill the task.
> >
> >Michael.
> >
> >Zaimin Zhong ([EMAIL PROTECTED]) wrote:
>
>
> >> After having made a thread execute periodically with
> >> pthread_make_periodic_np(3), how to find out whether the thread overruns
> the
> >> CPU within from this thread.
> >>
> >> To state my question more clearly: In my program, a RTL thread carries
> out
> >> periodic computation at fixed step. It is necessary for the thread to
> find
> >> out whether the last computation is finished when the given time slice
> >> elapses.
> >>
> >> If I correctly understand, RTL thread will complete its computation even
> if
> >> the give time slice is too small to finish the job and give out logically
> >> correct but NON-REAL-TIME results. Am I correct?
> >>
> >> James
>
>
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