Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751685AbeACJQX (ORCPT <rfc822;ralf@linux-mips.org> + 1 other);
        Wed, 3 Jan 2018 04:16:23 -0500
Received: from mail-io0-f174.google.com ([209.85.223.174]:44813 "EHLO
        mail-io0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751245AbeACJQV (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 3 Jan 2018 04:16:21 -0500
X-Google-Smtp-Source: ACJfBoujYd1K0jGC4Sjta0V6Ly9yBJ1a0XAoZekHAsIxs9M6ifJkn2AtZNA4iB3CgmtmZgpUNNzZvSZs4QELYgsaLro=
MIME-Version: 1.0
In-Reply-To: <20171222204247.kyc6ugyyu3ei7zhs@hirez.programming.kicks-ass.net>
References: <20171221102139.177253391@infradead.org> <20171221102235.088181011@infradead.org>
 <CAKfTPtCi_0JAvBmY4QGVAGaB_wMJJEDZ1dob8gAsHR21TuhJCg@mail.gmail.com>
 <CAKfTPtCVgnO1zcD_X4Ad-T0auWmN-TJ0dezv0P5wEtubkbgHyQ@mail.gmail.com>
 <20171222075934.f6yenvcb2zkf2ysd@hirez.programming.kicks-ass.net>
 <CAKfTPtC0+5zjvgNXMyVcvnnyJh0giQgJHtx+5p-GEpjUW1x8eg@mail.gmail.com>
 <20171222082915.4lcb7xyyooqyjpia@hirez.programming.kicks-ass.net>
 <20171222091221.ow5vn3ydx3hj4nht@hirez.programming.kicks-ass.net>
 <CAKfTPtAzutuyA7D2qOErKPwdFaRK082YAtVn4ci8hAOUvL3zMQ@mail.gmail.com>
 <20171222185629.lysjebfifgdwvvhu@hirez.programming.kicks-ass.net> <20171222204247.kyc6ugyyu3ei7zhs@hirez.programming.kicks-ass.net>
From: Vincent Guittot <vincent.guittot@linaro.org>
Date: Wed, 3 Jan 2018 10:16:00 +0100
Message-ID: <CAKfTPtD13p-n9otxq23rQZZKUfA1r03bxYBSDtSdm5HbWX7H6Q@mail.gmail.com>
Subject: Re: [RFC PATCH 2/5] sched: Add NOHZ_STATS_KICK
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Brendan Jackman <brendan.jackman@arm.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>

Hi Peter,

On 22 December 2017 at 21:42, Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, Dec 22, 2017 at 07:56:29PM +0100, Peter Zijlstra wrote:
>> Right; but I figured we'd try and do it 'right' and see how horrible it
>> is before we try and do funny things.
>
> So now it should have a 32ms tick for up to .5s when the system goes
> completely idle.
>
> No idea how bad that is..

I have tested your branch but the timer doesn't seem to fire correctly
because i can still see blocked load in the use case i have run.
I haven't found the reason yet