EDF Pluggable Scheduler

[Petr Benes]

Dear Mr. Bloom,

I am applying to you for an advice regarding RTEMS scheduling.

I am currently working on my master thesis at CTU Prague dealing with 
porting a resource reservation framework (www.frescor.org) onto RTEMS. I 
need to ensure a temporal independence/isolation of separate tasks and 
for this we are to use an EDF scheduler with an incorporated CBS 
(Constant Bandwidth Server).

As far as I am concerned, you work on some EDF or you have it done. I 
assume it is a pluggable one, since there is the feature in RTEMS 4.11 
already implemented.

I have just finished a quickie implementation of a pluggable EDF on my 
own (git at rtime.felk.cvut.cz:/rtems-pluggable-edf) having Martin Molnar's 
one as an example. I guess you know each other (he is also from CTU).

The question I have is whether you happen to have some solution or at 
least an idea how to handle Deadline interchange and you are willing to 
share the experience. There is nothing reasonable proposed in the thesis 
by Martin Molnar 
(https://dip.felk.cvut.cz/browse/pdfcache/molnam1_2006dipl.pdf). So far, 
for sake of simplicity, I was thinking about some kind of hack making 
use of the current RAPs used by priority scheduling.

Best regards

Bc. Petr Beneš
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