linux-kernel - Re: [PATCH 14/16] sched: make __update_entity_runnable

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Message-ID: <1341416463.19870.6.camel@laptop>
Date:	Wed, 04 Jul 2012 17:41:03 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Paul Turner <pjt@...gle.com>
Cc:	linux-kernel@...r.kernel.org, Venki Pallipadi <venki@...gle.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>,
	Mike Galbraith <efault@....de>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Ben Segall <bsegall@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>
Subject: Re: [PATCH 14/16] sched: make __update_entity_runnable_avg() fast

On Wed, 2012-06-27 at 19:24 -0700, Paul Turner wrote:
> +#define LOAD_AVG_MAX 46742 /* maximum possible load avg */

With 1024 * 1/(1-y), with y^32 = 0.5 I get 47788.. sup?

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