linux-kernel - Re: [PATCH v7 0/8] Tunable sched_mc_power

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Message-Id: <1231137413.10471.23.camel@marge.simson.net>
Date:	Mon, 05 Jan 2009 07:36:53 +0100
From:	Mike Galbraith <efault@....de>
To:	svaidy@...ux.vnet.ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v7 0/8] Tunable sched_mc_power_savings=n

Virgin 28 does not have a knee, but grows one when NEWIDLE is enabled.
The throughput curve is essentially the mc=2 curve with the knee
smoothed away, and a higher peak.  The very end is considerably lower.
ie it only helps the extremely contested end, and not nearly as much.
The whole curve is roughly a point under the 26.8 curve (which could
easily be config differences etc, but the shape is right).

I'll rummage around.

	-Mike

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