linux-kernel - Re: power increase issue on light load

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Message-ID: <1309273180.6701.213.camel@twins>
Date:	Tue, 28 Jun 2011 16:59:40 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Alex,Shi" <alex.shi@...el.com>
Cc:	"ncrao@...gle.com" <ncrao@...gle.com>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"Chen, Tim C" <tim.c.chen@...el.com>,
	"Li, Shaohua" <shaohua.li@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	len.brown@...el.com
Subject: Re: power increase issue on light load

On Tue, 2011-06-28 at 08:02 +0800, Alex,Shi wrote:
> > > 
> > > What happens if you try something like the below. Increased imbalance
> > > might lead to more load-balance action, which might lead to more task
> > > migration/waking up of cpus etc.
> > > 
> > > If the below makes any difference, Nikhil's changes have a funny that
> > > needs to be caught.
> > 
> > Yes, it most remove the commit effect, So the power recovered. 
> > 
> > In fact the only suspicious I found is large imbalance, but that is
> > the commit want ...
> 
> Any further comments for this? 

I had a look over all that stuff, but I couldn't find an obvious unit
mis-match in any of the imbalance code. Nikhil any clue?
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