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

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Message-Id: <1231130416.5479.8.camel@marge.simson.net>
Date:	Mon, 05 Jan 2009 05:40:16 +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 Mon, 2009-01-05 at 08:50 +0530, Vaidyanathan Srinivasan wrote: 
> When CONFIG_SCHED_DEBUG is enabled, the sched domain tree is dumped
> (dmesg)

Oh, that.  I'm dense <thwack>

[    0.476050] CPU0 attaching sched-domain:
[    0.476052]  domain 0: span 0-1 level MC
[    0.476054]   groups: 0 1
[    0.476057]   domain 1: span 0-3 level CPU
[    0.476058]    groups: 0-1 2-3
[    0.476062] CPU1 attaching sched-domain:
[    0.476064]  domain 0: span 0-1 level MC
[    0.476065]   groups: 1 0
[    0.476067]   domain 1: span 0-3 level CPU
[    0.476069]    groups: 0-1 2-3
[    0.476072] CPU2 attaching sched-domain:
[    0.476073]  domain 0: span 2-3 level MC
[    0.476075]   groups: 2 3
[    0.476077]   domain 1: span 0-3 level CPU
[    0.476078]    groups: 2-3 0-1
[    0.476081] CPU3 attaching sched-domain:
[    0.476083]  domain 0: span 2-3 level MC
[    0.476084]   groups: 3 2
[    0.476086]   domain 1: span 0-3 level CPU
[    0.476088]    groups: 2-3 0-1

2.6.26.8
[    0.524043] CPU0 attaching sched-domain:
[    0.524045]  domain 0: span 0-1
[    0.524046]   groups: 0 1
[    0.524049]   domain 1: span 0-3
[    0.524051]    groups: 0-1 2-3
[    0.524054] CPU1 attaching sched-domain:
[    0.524055]  domain 0: span 0-1
[    0.524056]   groups: 1 0
[    0.524059]   domain 1: span 0-3
[    0.524060]    groups: 0-1 2-3
[    0.524063] CPU2 attaching sched-domain:
[    0.524064]  domain 0: span 2-3
[    0.524065]   groups: 2 3
[    0.524068]   domain 1: span 0-3
[    0.524069]    groups: 2-3 0-1
[    0.524072] CPU3 attaching sched-domain:
[    0.524073]  domain 0: span 2-3
[    0.524075]   groups: 3 2
[    0.524077]   domain 1: span 0-3
[    0.524078]    groups: 2-3 0-1

> I was actually asking about software threads specified in the sysbench
> benchmark.  Your have run almost 256 clients on a 4 core box, does
> that mean sysbench had 256 worker threads?

Yes.

	-Mike

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