linux-kernel - Re: [PATCH 09/16] sched/fair: Let asymmetric cpu configurations balance at wake-up

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Message-ID: <20160608143613.GM30909@twins.programming.kicks-ass.net>
Date:	Wed, 8 Jun 2016 16:36:13 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Morten Rasmussen <morten.rasmussen@....com>
Cc:	mingo@...hat.com, dietmar.eggemann@....com, yuyang.du@...el.com,
	vincent.guittot@...aro.org, mgalbraith@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/16] sched/fair: Let asymmetric cpu configurations
 balance at wake-up

On Wed, Jun 08, 2016 at 12:29:52PM +0100, Morten Rasmussen wrote:
> Let's take your example above and add that t0 should really be running
> on cpu2/3 due to its utilization, assuming SD1[01] are little cpus and
> SD1[23] are big cpus. In that case we would still do affine-wakeup and
> stick the task on cpu0 despite it being a little cpu.

Ah indeed.