linux-kernel - Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on scheduler utilization data

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Date:	Thu, 31 Mar 2016 14:42:06 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Rafael J. Wysocki" <rafael@...nel.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Juri Lelli <juri.lelli@....com>,
	Steve Muckle <steve.muckle@...aro.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Michael Turquette <mturquette@...libre.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on
 scheduler utilization data

On Thu, Mar 31, 2016 at 02:18:33PM +0200, Rafael J. Wysocki wrote:
> On Thu, Mar 31, 2016 at 2:12 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> >
> > Ingo reminded me that the schedutil governor is part of the scheduler
> > proper and can access scheduler data because of that.
> >
> > This allows us to remove the util and max arguments since only the
> > schedutil governor will use those, which leads to some further text
> > reduction:
> >
> >   43595    1226      24   44845    af2d defconfig-build/kernel/sched/fair.o.pre
> >   42907    1226      24   44157    ac7d defconfig-build/kernel/sched/fair.o.post
> >
> > Of course, we get more text in schedutil in return, but the below also
> > shows how we can benefit from not being tied to those two parameters by
> > doing a very coarse deadline reservation.
> 
> OK
> 
> Do you want this to go into the series or be folded into the schedutil
> patch or on top  of it?

We can do it on top; no need to rush this.