linux-kernel - Re: [RFC PATCH 3/3] sched: Implement shared wakequeue in CFS

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Message-ID: <20230621142212.GH2053369@hirez.programming.kicks-ass.net>
Date:   Wed, 21 Jun 2023 16:22:12 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     David Vernet <void@...ifault.com>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        juri.lelli@...hat.com, rostedt@...dmis.org,
        dietmar.eggemann@....com, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com, joshdon@...gle.com,
        roman.gushchin@...ux.dev, tj@...nel.org, kernel-team@...a.com
Subject: Re: [RFC PATCH 3/3] sched: Implement shared wakequeue in CFS

On Tue, Jun 20, 2023 at 02:54:23PM -0500, David Vernet wrote:

> Another consideration is that even if we could adjust newidle_balance()
> to load balance well enough for our specific purpose, we're still
> relying on heuristics to determine when it's appropriate to load
> balance; and that will 

Your thing has heuristics too.

But if we're going to do this, then it should replace newidle <= LLC
domains.