linux-kernel - Re: [RFC PATCH 3/4] sched/topology: remove smt

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Message-ID: <20180907124252.GM24082@hirez.programming.kicks-ass.net>
Date:   Fri, 7 Sep 2018 14:42:52 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Qais Yousef <qais.yousef@....com>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 3/4] sched/topology: remove smt_gain

On Wed, Aug 29, 2018 at 03:08:38PM +0100, Qais Yousef wrote:
> It was hard to track the history of this and *why* it's needed.

Yeah, my bad..

So at some point I wanted to do dynamic capacity and dynamic smt gain by
using the x86 APERF/MPERF stuff. But it never quite worked and we got
stuck with the remnants.