linux-kernel - Re: [PATCH 2/3] sched: Fix the wakeup nomination for sched_mc/smt_power

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Message-Id: <1234806323.30178.189.camel@laptop>
Date:	Mon, 16 Feb 2009 18:45:23 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Gautham R Shenoy <ego@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, svaidy@...ux.vnet.ibm.com,
	mingo@...e.hu, suresh.b.siddha@...el.com, balbir@...ibm.com,
	dipankar@...ibm.com, efault@....de, andi@...stfloor.org
Subject: Re: [PATCH 2/3] sched: Fix the wakeup nomination for
 sched_mc/smt_power_savings.

On Mon, 2009-02-16 at 22:21 +0530, Gautham R Shenoy wrote:
> @@ -520,6 +520,11 @@ struct root_domain {
>          * low system utilisation. Triggered at POWERSAVINGS_BALANCE_WAKEUP(2)
>          */
>         unsigned int sched_mc_preferred_wakeup_cpu;
> +       /*
> +        * The sched-domain level which is authorized to nominate the preferred
> +        * wake up cpu.
> +        */
> +       enum sched_domain_level authorized_nomination_level

Some day my brain is just going to explode.. ;-)

Can we do a nice concise writeup of the power-save dynamics somewhere?

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