linux-kernel - Re: [PATCH] sched/fair: Do not decay new task load on first enqueue

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Message-ID: <20160928193731.GD16071@codeblueprint.co.uk>
Date:   Wed, 28 Sep 2016 20:37:31 +0100
From:   Matt Fleming <matt@...eblueprint.co.uk>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
        Mike Galbraith <umgwanakikbuti@...il.com>,
        Yuyang Du <yuyang.du@...el.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>
Subject: Re: [PATCH] sched/fair: Do not decay new task load on first enqueue

On Wed, 28 Sep, at 12:14:22PM, Peter Zijlstra wrote:
> 
> Which suggests we do something like the below (not compile tested or
> anything, also I ran out of tea again).

I'm away on FTO right now. I can test this when I return on Friday.

Funnily enough, I now remember that I already sent a fix for the
missing update_rq_clock() in post_init_entity_util_avg(), but didn't
apply it when chasing this hackbench regression (oops),

  https://lkml.kernel.org/r/20160921133813.31976-3-matt@codeblueprint.co.uk