Re: Plumbers: Tweaking scheduler policy micro-conf RFP

[Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>]

* Vincent Guittot <vincent.guittot@linaro.org> [2012-05-15 17:05:47]:

> On 15 May 2012 15:00, Peter Zijlstra <peterz@infradead.org> wrote:
> > On Tue, 2012-05-15 at 14:57 +0200, Vincent Guittot wrote:
> >>
> >> Not sure that nobody cares but it's much more that scheduler,
> >> load_balance and sched_mc are sensible enough that it's difficult to
> >> ensure that a modification will not break everything for someone
> >> else.
> >
> > Thing is, its already broken, there's nothing else to break :-)
> >
> 
> sched_mc is the only power-aware knob in the current scheduler. It's
> far from being perfect but it seems to work on some ARM platform at
> least. You mentioned at the scheduler mini-summit that we need a
> cleaner replacement and everybody has agreed on that point. Is anybody
> working on it yet ? and can we discuss at Plumber's what this
> replacement would look like ?

Hi Vincent,

In the earlier discussion we listed down the cleanup requirements.
I made a cleanup patch that unifies the sysfs interface as a first
step.

[RFC PATCH v1 0/2] sched: unified sched_powersavings tunables
http://thread.gmane.org/gmane.linux.kernel/1239750

I need to make this scheme generically work on different topology,
which is the real problem that we need to solve.

--Vaidy