On Tue, Jan 21, 2014 at 04:38:51PM +0100, Peter Zijlstra wrote:
> SCHED_DEADLINE: Sporadic task model deadline scheduling
> SCHED_DEADLINE is an implementation of GEDF (Global Earliest
> Deadline First) with additional CBS (Constant Bandwidth Server).
We might want to re-word that to:
SCHED_DEADLINE currently is an implementation of GEDF, however
any policy that correctly schedules the sporadic task model is
a valid implementation.
To make sure we should not rely on the actual implementation; there's
many possible algorithms to schedule the sporadic task model.
> The CBS guarantees that tasks that over-run their specified
> budget are throttled and do not affect the correct performance
> of other SCHED_DEADLINE tasks.
>
> SCHED_DEADLINE tasks will fail FORK(2) with -EAGAIN
>
> Setting SCHED_DEADLINE can fail with -EINVAL when admission
> control tests fail.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
