linux-kernel - Re: [RFC][PATCH v5 00/14] sched: packing tasks

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Date:	Wed, 13 Nov 2013 09:56:28 -0800
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, Paul Turner <pjt@...gle.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	Chris Metcalf <cmetcalf@...era.com>,
	Tony Luck <tony.luck@...el.com>,
	"alex.shi@...el.com" <alex.shi@...el.com>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	"len.brown@...el.com" <len.brown@...el.com>,
	"l.majewski@...sung.com" <l.majewski@...sung.com>,
	Jonathan Corbet <corbet@....net>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: [RFC][PATCH v5 00/14] sched: packing tasks


>> for picking the cpu to wake on there are also low level physical kind of things
>> we'd want to take into account on the intel side.
>
> Are these static and could they be hidden behind some cost number in a
> topology description? If they are dynamic, we would need arch or driver
> hooks to give some cost or priority number that the scheduler can use.

they're dynamic but slow moving (say, reevaluated once per second)

so we could have a static table that some driver updates async

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