linux-kernel - Re: [RFC][PATCH 5/7] sched: Rewrite select_idle

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Date:	Wed, 11 May 2016 09:43:55 +0200
From:	Mike Galbraith <mgalbraith@...e.de>
To:	Yuyang Du <yuyang.du@...el.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...nel.org, linux-kernel@...r.kernel.org, clm@...com,
	matt@...eblueprint.co.uk, tglx@...utronix.de, fweisbec@...il.com
Subject: Re: [RFC][PATCH 5/7] sched: Rewrite select_idle_siblings()

On Wed, 2016-05-11 at 07:42 +0800, Yuyang Du wrote:

> Do you have any suggestion about doing other part of
> select_task_rq_fair?

Conjure up a decent metric for placing tasks in tasty hot L2?  That
would be really lovely to have (/me pondering page faults..).

We used to have an avg_overlap heuristic, which would let us stack high
speed ping-pong like things such that they could really smoke.  It was
too fragile though, so had to go away.

	-Mike