linux-kernel - [0/11][REPOST] Energy-aware scheduling use-cases and scheduler issues

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Message-Id: <1389111587-5923-1-git-send-email-morten.rasmussen@arm.com>
Date:	Tue,  7 Jan 2014 16:19:36 +0000
From:	Morten Rasmussen <morten.rasmussen@....com>
To:	peterz@...radead.org, mingo@...nel.org
Cc:	rjw@...ysocki.net, markgross@...gnar.org,
	vincent.guittot@...aro.org, catalin.marinas@....com,
	morten.rasmussen@....com, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [0/11][REPOST] Energy-aware scheduling use-cases and scheduler issues

Reposting the series with LKML on cc as well.

Original thread (with a few replies) can be found here:
http://article.gmane.org/gmane.linux.power-management.general/41501

Sorry for double-posting.

Morten

------------------------------------------------------------------------

Hi,

One of the requests from the scheduler maintainers at the Energy-aware
Scheduling workshop at Kernel Summit this year was to provide plain text
descriptions of use-cases (workloads) and system topologies. To get that
moving I have written some short texts about some use-cases. In addition
I described a list of issues that today prevent mainly the scheduler
from achieving a good energy/performance balance in common use-cases.
The follow-up emails are structured as follows:

1-6:	Current issues related to energy/performance balance.
7-10:	Use-cases (overall behaviour and energy/performance goals)
11:	DVFS example (for reference)

I'm hoping that this provides some of the background for why I'm
interested in improving energy-awareness in the scheduler. I'm aware
that the use-cases and issues/wishlist don't cover everyone's area of
interest. Input is needed to fix that.

Comments and input are appreciated.

Morten

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