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From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To: Vincent Guittot <vincent.guittot@linaro.org>,
	peterz@infradead.org, mingo@kernel.org,
	linux-kernel@vger.kernel.org
Cc: rjw@rjwysocki.net, Morten.Rasmussen@arm.com,
	patrick.bellasi@arm.com, pjt@google.com, bsegall@google.com,
	thara.gopinath@linaro.org, pkondeti@codeaurora.org,
	quentin.perret@arm.com, srinivas.pandruvada@linux.intel.com
Subject: Re: [PATCH v8 2/3] sched/fair: update scale invariance of PELT
Date: Wed, 23 Jan 2019 09:25:56 +0100	[thread overview]
Message-ID: <a3671d96-5003-6a50-ad2d-64833ca216a1@arm.com> (raw)
In-Reply-To: <1547631791-16018-3-git-send-email-vincent.guittot@linaro.org>

On 1/16/19 10:43 AM, Vincent Guittot wrote:

[...]

> +static inline u64 rq_clock_pelt(struct rq *rq)
> +{

Doesn't this function need

   lockdep_assert_held(&rq->lock);
   assert_clock_updated(rq);

like rq_clock() and rq_clock_task()? Later to support commit 
cb42c9a3ebbb "sched/core: Add debugging code to catch missing 
update_rq_clock() calls".

> +	return rq->clock_pelt - rq->lost_idle_time;
> +}

[...]

  reply	other threads:[~2019-01-23  8:26 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-16  9:43 [PATCH v8 0/3] sched/fair: update scale invariance of PELT Vincent Guittot
2019-01-16  9:43 ` [PATCH v8 1/3] sched/fair: move rq_of helper function Vincent Guittot
2019-01-16  9:43 ` [PATCH v8 2/3] sched/fair: update scale invariance of PELT Vincent Guittot
2019-01-23  8:25   ` Dietmar Eggemann [this message]
2019-01-23  9:48     ` Vincent Guittot
2019-01-23 11:19       ` Dietmar Eggemann
2019-01-16  9:43 ` [PATCH v8 3/3] sched/pelt: skip updating util_est when utilization is higher than cpu's capacity Vincent Guittot

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