[ECOS] eCos scheduler

[Fabian Scheler]

Hello,

this topic has already been discussed here:
http://sourceware.org/ml/ecos-discuss/2005-10/msg00159.html
maybe the arguments announced there can help you

some comments:
- to implement the EDF scheduler on top of the bitmap scheduler is a
rather poor solution (as is to use the mlq-scheduler), how would you
handle more than 32 Threads with different priorities?
- you should implement a priority queue that is able to distinguish an
arbitrary number of different priorities t.m. deadlines (something
like a heap)
- about redirecting the calls: it is not that easy to 'redirect' the
calls, each scheduler has one scheduler specific class
Cyg_Scheduler_Implementation, if you want your EDF scheduler to be the
'standard' scheduler and want to use the bitmap scheduler as base,
then you have at least to rename the class
Cyg_Scheduler_Implementation implementing the bitmap scheduler
- if you make up your mind about the scheduleability of you system
before runtime you can maybe omit the thread attributes wcet and
period

Ciao, Fabian

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