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Subject: Re: [RFC][PATCH 03/22] sched: SCHED_DEADLINE data structures.
From: Raistlin <raistlin@linux.it>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
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On Wed, 2010-11-10 at 19:59 +0100, Peter Zijlstra wrote:
> On Fri, 2010-10-29 at 08:28 +0200, Raistlin wrote:
> > +       /*
> > +        * Bandwidth enforcement timer. Each -deadline task has its
> > +        * own bandwidth to be enforced, thus we need one timer per tas=
k.
> > +        */
> > +       struct hrtimer dl_timer;=20
>=20
> This is for the bandwidth replenishment right?=20
Yep.

> Not the runtime throttle?
>=20
Not, that is done on tick basis, or by means of hrtick, if enabled.

> The throttle thing should only need a single timer per rq as only the
> current task will be consuming runtime.
>
Sure, and that's what the hrtick does (again, if enabled).

Thanks,
Dario

--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa  (Italy)

http://blog.linux.it/raistlin / raistlin@ekiga.net /
dario.faggioli@jabber.org

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