linux-kernel - Re: [PATCH] sched/fair: Load balance aggressively for SCHED

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Date:   Thu, 2 Jan 2020 12:29:01 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/fair: Load balance aggressively for SCHED_IDLE
 CPUs

On Tue, 24 Dec 2019 10:43:30 +0530
Viresh Kumar <viresh.kumar@...aro.org> wrote:

> This is tested on ARM64 Hikey620 platform (octa-core) with the help of
> rt-app and it is verified, using kernel traces, that the newly
> SCHED_IDLE CPU does load balancing shortly after it becomes SCHED_IDLE
> and pulls tasks from other busy CPUs.

Can you post the actual steps you used to test this and show the before
and after results? Then others can reproduce what you have shown and
even run other tests to see if this change has any other side effects.

Thanks!

-- Steve