Re: [Xenomai-core] Scheduler extensions

[Philippe Gerum <rpm@xenomai.org>]

On 05/08/2012 09:23 AM, Jonas Flodin wrote:
>
> Hi!
>
> I'm a PhD student who is currently doing research on multicore real-time
> scheduling. I'm considering using Xenomai as a base for my research
> experiments, but this would require me to replace or extend the current
> scheduler. So far I have found no documents detailing how the scheduler
> is implemented or how to extend it (if possible). Could you point me to
> information regarding the scheduler?
>

There is no documentation on the scheduling core. You should probably 
start with ksrc/nucleus/sched*.c, and include/nucleus/sched*.h, having a 
look at the files implementing the plain FIFO policy in sched-rt*.

Hint: the scheduling core is meant to be extensible, adding a new policy 
entails providing an implementation for a new struct xnsched_class 
object. Make sure to read the comments in the files implementing the 
existing policies (-rt, -sporadic, -tp), they usually mention details on 
the calling context and requirements for the handlers defined by the 
xnsched_class type.

> Thank you in advance.
>
> BR
> Jonas Flodin
>
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-- 
Philippe.