linux-kernel - Re: [RFCv2 PATCH 00/23] sched: Energy cost model for energy-aware scheduling

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Message-ID: <20140703231950.GA4881@intel.com>
Date:	Fri, 4 Jul 2014 07:19:50 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	Morten Rasmussen <morten.rasmussen@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	"vincent.guittot@...aro.org" <vincent.guittot@...aro.org>,
	"daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
	"preeti@...ux.vnet.ibm.com" <preeti@...ux.vnet.ibm.com>,
	"Dietmar.Eggemann@....com" <Dietmar.Eggemann@....com>,
	"pjt@...gle.com" <pjt@...gle.com>
Subject: Re: [RFCv2 PATCH 00/23] sched: Energy cost model for energy-aware
 scheduling

Hi Morten,

On Fri, Jul 04, 2014 at 12:25:47AM +0800, Morten Rasmussen wrote:
> * Note that these energy savings are _not_ representative of what can be
> achieved on a true SMP platform where all cpus are equally 
> energy-efficient. There should be benefit for SMP platforms as well, 
> however, it will be smaller.
> 
> The energy model led to consolidation of the short tasks on the A7
> cluster (more energy-efficient), while sysbench made use of all cpus as
> the A7s didn't have sufficient compute capacity to handle the five
> tasks.

Looks like this patchset is mainly for big.LITTLE? And can the patchset
actually replace Global Task Scheduling?

Thanks,
Yuyang
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