Re: gnat: time-slicing

["Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>]

It sounds like you are looking for some way of controlling the scheduling
algorithm. Some compilers use some version of a "run until blocked"
algorithm and the "blocked" part won't necessarily happen where you'd like
it to (such as on an I/O statement). Some implementations might give you the
ability to select some flavor of round-robin timeslicing as the means of
scheduling. That would give you more of a "fair share" situation, but won't
necessarily give you deterministic behavior from your program. If you don't
need determinism, this may be a viable option. You need to investigate your
compiler documentation to see if you can do anything to specify the
scheduling algorithm to use.

Check out Annex D or the ARM very carefully & you might find some useful
information there about scheduling and priorities. Tasking is one of the
more complicated features of Ada and I regularly find myself having to go
back to the ARM and re-learn how to do it. :-)

MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com


"Jan Prazak" <janp9@gmx.net> wrote in message
news:pan.2002.07.15.16.20.47.38263.1135@gmx.net...
>
> The task uses one Put, which puts current time somewhere on the screen.
> And this task has to be completely independent from other tasks (= main
> procedure). There has to be a way to do this with gnat, and that's also
> my question. I don't want to slow down other tasks with "Delay", just to
> let Timer-task do the next step (for example when doing some difficult
> computing, maybe array-sorting or similar things), so there has to be a
> "direct" way (like a pragma).
>