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

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Message-ID: <20161018111017.GY3142@twins.programming.kicks-ass.net>
Date:   Tue, 18 Oct 2016 13:10:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Matt Fleming <matt@...eblueprint.co.uk>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Wanpeng Li <kernellwp@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Mike Galbraith <umgwanakikbuti@...il.com>,
        Yuyang Du <yuyang.du@...el.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>
Subject: Re: [PATCH] sched/fair: Do not decay new task load on first enqueue

On Tue, Oct 18, 2016 at 11:29:37AM +0100, Matt Fleming wrote:
> On Tue, 11 Oct, at 11:24:53AM, Matt Fleming wrote:
> > 
> > That's a lot more costly cross-DIE migrations. I think this patch is
> > along the right lines, but there's something fishy happening on this
> > box.
> 
> I wasn't really able to track down why this machine regressed, and the
> patch shows enough improvement for other boxes that I think it's worth
> sticking in tip/sched/core.
> 

I'm entirely lost as to which patch we're talking about by now ;-)