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Subject: Re: [RFC][PATCH 12/22] sched: add runtime reporting for -deadline
 tasks
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 Thu, 2010-11-11 at 20:37 +0100, Peter Zijlstra wrote:
> > -#ifdef CONFIG_SCHEDSTATS
> >  struct sched_stats_dl {
> > +#ifdef CONFIG_SCHEDSTATS
> >  	u64			last_dmiss;
> >  	u64			last_rorun;
> >  	u64			dmiss_max;
> >  	u64			rorun_max;
> > -};
> >  #endif
> > +	u64			tot_rtime;
> > +};
> > =20
>=20
> I know we agreed to pull this from the sched_param2 structure and delay
> exposing this information for a while until the base patches got merged
> and came up with a solid use-case,=20
>
Sure! :-)

> but reading this patch makes me
> wonder why tsk->se.sum_exec_runtime isn't good enough?
>
Might be, but what you usually want is something reporting you total
runtime from when you became a -deadline task, which may not be the case
of sum_exec_runtime, is it?

BTW, again, let's postpone this.

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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