linux-kernel - Re: [PATCH 04/14] sched,fair: move runnable_load_avg to cfs

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Message-ID: <20190730085541.GU31398@hirez.programming.kicks-ass.net>
Date:   Tue, 30 Jul 2019 10:55:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Rik van Riel <riel@...riel.com>
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, pjt@...gle.com,
        dietmar.eggemann@....com, mingo@...hat.com,
        morten.rasmussen@....com, tglx@...utronix.de,
        mgorman@...hsingularity.net, vincent.guittot@...aro.org
Subject: Re: [PATCH 04/14] sched,fair: move runnable_load_avg to cfs_rq

On Mon, Jul 22, 2019 at 01:33:38PM -0400, Rik van Riel wrote:
> Since only the root cfs_rq runnable_load_avg field is used any more,
> we can move the field from struct sched_avg, which every sched_entity
> has one of, directly into the struct cfs_rq, of which we have way fewer.
> 
> No functional changes.
> 
> Suggested-by: Dietmar Eggemann <dietmar.eggemann@....com>

I think he's praying on space in that cacheline ;-)