linux-kernel - Re: [PATCH v2 2/3] sched/fair: Move hot load

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Message-ID: <1449194876.3240.9.camel@gmail.com>
Date:	Fri, 04 Dec 2015 03:07:56 +0100
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Waiman Long <waiman.long@....com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, Yuyang Du <yuyang.du@...el.com>,
	Paul Turner <pjt@...gle.com>, Ben Segall <bsegall@...gle.com>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Scott J Norton <scott.norton@....com>,
	Douglas Hatch <doug.hatch@....com>
Subject: Re: [PATCH v2 2/3] sched/fair: Move hot load_avg into its own
 cacheline

On Thu, 2015-12-03 at 14:34 -0500, Waiman Long wrote:
> On 12/02/2015 11:32 PM, Mike Galbraith wrote:

> > Is that with the box booted skew_tick=1?

> I haven't tried that kernel parameter. I will try it to see if it can 
> improve the situation. BTW, will there be other undesirable side effects 
> of using this other than the increased power consumption as said in the 
> kernel-parameters.txt file?

Not that are known.  I kinda doubt you'd notice the power, but you
should see a notable performance boost.  Who knows, with a big enough
farm of busy big boxen, it may save power by needing fewer of them.

	-Mike 

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