Re: [PATCH v3 2/2] sched: consider missed ticks when updating global cpu load

From: Frederic Weisbecker
Date: Tue Oct 13 2015 - 10:55:13 EST


On Tue, Oct 13, 2015 at 05:37:18PM +0900, Byungchul Park wrote:
> > > find out the pending updates from update_process_times() itself and pass
> > > it to scheduler_tick() which is the one interested in it.
> >
> > tick_nohz_handler() calls tick_sched_handler() ?!
> >
> > And tick_nohz_handler() actually computes the number of ticks -- which
> > we then happily ignore.
> >
> > Why compute it again a few functions down?
>
> i think so.
>
> additionally, i think it would be better to assume that scheduler_tick()
> handles 1 tick as peter said e.g. because of virt, and to handle the
> case caused by full NOHZ *in the nohz related code*.

You mean "not to assume" right?

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