linux-kernel - Re: [RFC PATCH 2/8] Documentation: arm: define DT cpu capacity bindings

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Date:	Tue, 15 Dec 2015 15:57:37 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Juri Lelli <juri.lelli@....com>
Cc:	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	peterz@...radead.org, vincent.guittot@...aro.org,
	linux@....linux.org.uk, sudeep.holla@....com,
	lorenzo.pieralisi@....com, catalin.marinas@....com,
	will.deacon@....com, morten.rasmussen@....com,
	dietmar.eggemann@....com, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Olof Johansson <olof@...om.net>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Paul Walmsley <paul@...an.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: Re: [RFC PATCH 2/8] Documentation: arm: define DT cpu capacity
 bindings

On Tue, Dec 15, 2015 at 03:46:51PM +0000, Juri Lelli wrote:
> On 15/12/15 15:32, Mark Rutland wrote:
> > On Tue, Dec 15, 2015 at 03:08:13PM +0000, Mark Brown wrote:
> > > My expectation is that we just need good enough, not perfect, and that
> > > seems to match what Juri is saying about the expectation that most of
> > > the fine tuning is done via other knobs.
> > 
> > My expectation is that if a ballpark figure is good enough, it should be
> > possible to implement something trivial like bogomips / loop_per_jiffy
> > calculation.
> > 
> 
> I didn't really followed that, so I might be wrong here, but isn't
> already happened a discussion about how we want/like to stop exposing
> bogomips info or rely on it for anything but in kernel delay loops?

I meant that we could have a benchmark of that level of complexity,
rather than those specific values.

Mark.
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