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

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Message-Id: <1230981761.27180.10.camel@marge.simson.net>
Date:	Sat, 03 Jan 2009 12:22:41 +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

On Sat, 2009-01-03 at 15:46 +0530, Vaidyanathan Srinivasan wrote:
> * Mike Galbraith <efault@....de> [2009-01-03 08:29:25]:
> 
> > On Fri, 2009-01-02 at 23:16 +0100, Ingo Molnar wrote:
> > 
> > > Mike, would you be interesting in having a look at sched_mc=2 as a 
> > > kernel-wide default - and give it your blessing if you find it to be a net 
> > > improvement for the various performance and interactivity tests you do?
> > 
> > Sure.
> 
> Thanks Mike and Ingo.  I will be glad to help with test and benchmarks
> on the platforms that I have access.
> 
> I am presently working on sysbench.

The testing I can do is rather severely limited since I have only one
Q6600.  I butchered mc_capable() to use what I can though, ie see if
SD_BALANCE_NEWIDLE still harms tbench and mysql+oltp.  I think that's
about all I can do on my wee box.

	-Mike

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