sched_wakeup_granularity_ns in CFS correctly designed or not?

[Rik van Riel]

On Sun, 2017-06-11 at 21:38 +0530, Rohith R wrote:
> Sure, CFS does not have any deadlines at all. But I am trying to
> measure its performance w.r.t to some workloads having some periods
> and deadlines. So in that case will the tasks having deadline of <
> 2.5 ms always miss the deadline ?

OK, let me get this straight:
1) Your application has a deadline.
2) You do not tell the kernel of that deadline.
3) You want to know if the kernel will keep the
   promise you never told it about?

Is that really your question?

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