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Date:	Sun, 8 Jun 2014 07:53:07 +0800
From:	Yuyang Du <>
To:	Ingo Molnar <>
Cc:	Peter Zijlstra <>,
	Dirk Brandewie <>,
	"Rafael J. Wysocki" <>,
	Morten Rasmussen <>,
	"" <>,
	"" <>,
	"" <>,
	"" <>,
	"" <>,
	Dietmar Eggemann <>,,
Subject: Re: [RFC PATCH 06/16] arm: topology: Define TC2 sched energy and
 provide it to scheduler

On Fri, Jun 06, 2014 at 02:13:05PM +0200, Ingo Molnar wrote:
> Leakage current typically gets higher with higher frequencies, but 
> it's also highly process dependent AFAIK.

In general, you can assume leakage power ~ V^2.

> If switching power dissipation is the main factor in power use, then 
> we can essentially assume that P ~ V^2, at the same frequency - and 
> scales linearly with frequency - but real work performed also scales 
> semi-linearly with frequency for many workloads, so that's an 
> invariant for everything except highly memory bound workloads.

Agreed. Strictly, Energy ~ V^2.
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