linux-kernel - Re: Plumbers: Tweaking scheduler policy micro-conf RFP

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Date:	Tue, 15 May 2012 17:05:47 +0200
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	paulmck@...ux.vnet.ibm.com, smuckle@...cinc.com, khilman@...com,
	Robin.Randhawa@....com, suresh.b.siddha@...el.com,
	thebigcorporation@...il.com, venki@...gle.com,
	panto@...oniou-consulting.com, mingo@...e.hu, paul.brett@...el.com,
	pdeschrijver@...dia.com, pjt@...gle.com, efault@....de,
	fweisbec@...il.com, geoff@...radead.org, rostedt@...dmis.org,
	tglx@...utronix.de, amit.kucheria@...aro.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linaro-sched-sig@...ts.linaro.org,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	Juri Lelli <juri.lelli@...il.com>
Subject: Re: Plumbers: Tweaking scheduler policy micro-conf RFP

On 15 May 2012 15:00, Peter Zijlstra <peterz@...radead.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 ?
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