Re: [RFC][PATCH 18/22] sched: add reclaiming logic to -deadlinetasks

[Peter Zijlstra]

On Fri, 2010-11-12 at 18:41 +0100, Luca Abeni wrote:
> > The problem the stochastic execution time model tries to address is the
> > WCET computation mess, WCET computation is hard and often overly
> > pessimistic, resulting in under-utilized systems.
> [...]
> BTW, sorry for the shameless plug, but even with the current 
> SCHED_DEADLINE you are not forced to dimension the runtime using the 
> WCET. 

Yes you are, it pushes the deadline back on overrun. The idea it to
maintain the deadline despite overrunning your budget (up to a point).

The paper we're all talking about is:

A. Mills and J. Anderson, " A Stochastic Framework for Multiprocessor
Soft Real-Time Scheduling", Proceedings of the 16th IEEE Real-Time and
Embedded Technology and Applications Symposium, pp. 311-320, April 2010.
http://www.cs.unc.edu/~anderson/papers/rtas10brevised.pdf

And I see they've got a new stochastic paper out:

A. Mills and J. Anderson, " Scheduling Stochastically-Executing Soft
Real-Time Tasks: A Multiprocessor Approach Without Worst-Case Execution
Times", in submission. 
http://www.cs.unc.edu/~anderson/papers/rtas11b.pdf


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