linux-kernel - Re: sched: Avoid SMT siblings in select_idle

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Message-ID: <1329761755.2293.373.camel@twins>
Date:	Mon, 20 Feb 2012 19:15:55 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mike Galbraith <efault@....de>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Paul Turner <pjt@...gle.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
Subject: Re: sched: Avoid SMT siblings in select_idle_sibling() if possible

On Mon, 2012-02-20 at 19:14 +0100, Mike Galbraith wrote:
> I thought this was pretty much sorted.  We want to prefer core over
> sibling, because on at laest some modern CPUs with L3, siblings suck
> rocks. 

Yeah, I since figured out how its supposed (and supposedly) does work.
Suresh was a bit too clever and forgot to put a comment in since clearly
it was obvious at the time ;-)
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