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From: Valentin Schneider <valentin.schneider@arm.com>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Morten Rasmussen <morten.rasmussen@foss.arm.com>,
	Brendan Jackman <brendan.jackman@arm.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>
Subject: Re: [PATCH v5 1/3] sched: Stop nohz stats when decayed
Date: Wed, 21 Feb 2018 13:48:31 +0000	[thread overview]
Message-ID: <f557c2fc-7175-33c1-16c3-839da6bf4702@arm.com> (raw)
In-Reply-To: <a351f2de-3a00-1cf8-b16f-59493c5b67f5@arm.com>

On 02/21/2018 01:13 PM, Valentin Schneider wrote:
> On 02/16/2018 01:44 PM, Vincent Guittot wrote:
>> On 16 February 2018 at 13:13, Valentin Schneider
>> <valentin.schneider@arm.com> wrote:
>>> On 02/14/2018 03:26 PM, Vincent Guittot wrote:
> BTW, with the current set on Peter's sched/testing, update_nohz_stats()
> is called here, which doesn't do the update if !rq->has_blocked_load
> (Although that check is done without lock/barrier, so maybe we could not see
> a CPU that just went idle ?)

Ignore that, that's another case of me being overly paranoid after reading
too much of Documentation/memory-barriers.txt 

  reply	other threads:[~2018-02-21 13:48 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-14 15:26 [PATCH v5 0/3] sched: Update blocked load Vincent Guittot
2018-02-14 15:26 ` [PATCH v5 1/3] sched: Stop nohz stats when decayed Vincent Guittot
2018-02-15 15:22   ` Patrick Bellasi
2018-02-15 16:50     ` Peter Zijlstra
2018-02-15 16:59       ` Patrick Bellasi
2018-02-15 17:06     ` Vincent Guittot
2018-02-16 12:13   ` Valentin Schneider
2018-02-16 13:44     ` Vincent Guittot
2018-02-21 13:13       ` Valentin Schneider
2018-02-21 13:48         ` Valentin Schneider [this message]
2018-02-22  8:37         ` Vincent Guittot
2018-02-22 10:04           ` Valentin Schneider
2018-02-16 12:53   ` Valentin Schneider
2018-02-16 17:02     ` Vincent Guittot
2018-02-16 19:23       ` Valentin Schneider
2018-02-14 15:26 ` [PATCH v5 2/3] sched: reduce the periodic update duration Vincent Guittot
2018-02-14 15:26 ` [PATCH v5 3/3] sched: update blocked load when newly idle Vincent Guittot
2018-02-20 11:59   ` Peter Zijlstra
2018-03-09  9:06   ` [tip:sched/core] sched/fair: Update " tip-bot for Vincent Guittot

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