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From: Peter Zijlstra <peterz@infradead.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: mingo@redhat.com, juri.lelli@redhat.com,
	dietmar.eggemann@arm.com, rostedt@goodmis.org,
	bsegall@google.com, mgorman@suse.de,
	linux-kernel@vger.kernel.org, pauld@redhat.com,
	parth@linux.ibm.com, valentin.schneider@arm.com
Subject: Re: [RFC 3/4] sched/fair: replace runnable load average by runnable average
Date: Thu, 13 Feb 2020 18:36:02 +0100	[thread overview]
Message-ID: <20200213173602.GQ14897@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200211174651.10330-4-vincent.guittot@linaro.org>

On Tue, Feb 11, 2020 at 06:46:50PM +0100, Vincent Guittot wrote:
> @@ -367,6 +367,14 @@ struct util_est {
>   * For cfs_rq, it is the aggregated load_avg of all runnable and
>   * blocked sched_entities.
>   *
> + * [runnable_avg definition]
> + *
> + *   runnable_avg = runnable%

				 * SCHED_CAPACITY_SCALE

right, just like we have for util_avg.

> + *
> + * where runnable% is the time ratio that a sched_entity is runnable.
> + * For cfs_rq, it is the aggregated runnable_avg of all runnable and
> + * blocked sched_entities.

Which is a verbatim repeat of the runnable% definition for load_avg,
right? Perhaps re-arrange the text such that we only have a single
definition for each symbol?

> + *
>   * [util_avg definition]
>   *
>   *   util_avg = running% * SCHED_CAPACITY_SCALE

Can you please split this patch in two? First remove everything
runnable_load_avg, and then introduce runnable_avg.

I didn't quickly spot anything off, and you're right that runnable vs
util is an interesting signal.

  parent reply	other threads:[~2020-02-13 17:36 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 17:46 [PATCH 0/4] remove runnable_load_avg and improve group_classify Vincent Guittot
2020-02-11 17:46 ` [PATCH 1/4] sched/fair: reorder enqueue/dequeue_task_fair path Vincent Guittot
2020-02-12 13:20   ` Mel Gorman
2020-02-12 14:47     ` Vincent Guittot
2020-02-12 16:11       ` Mel Gorman
2020-02-11 17:46 ` [RFC 2/4] sched/numa: replace runnable_load_avg by load_avg Vincent Guittot
2020-02-12 13:37   ` Mel Gorman
2020-02-12 15:03     ` Vincent Guittot
2020-02-12 16:04       ` Mel Gorman
2020-02-12 19:49     ` Mel Gorman
2020-02-12 21:29       ` Mel Gorman
2020-02-13  8:05       ` Vincent Guittot
2020-02-13  9:24         ` Mel Gorman
     [not found]         ` <20200213131658.9600-1-hdanton@sina.com>
2020-02-13 13:46           ` Mel Gorman
2020-02-13 15:00             ` Phil Auld
2020-02-13 15:14               ` Mel Gorman
2020-02-13 16:11                 ` Vincent Guittot
2020-02-13 16:34                   ` Mel Gorman
2020-02-13 16:38                     ` Vincent Guittot
2020-02-13 17:02                       ` Mel Gorman
2020-02-13 17:15                         ` Vincent Guittot
2020-02-11 17:46 ` [RFC 3/4] sched/fair: replace runnable load average by runnable average Vincent Guittot
2020-02-12 14:30   ` Mel Gorman
2020-02-14  7:42     ` Vincent Guittot
2020-02-13 17:36   ` Peter Zijlstra [this message]
2020-02-14  7:43     ` Vincent Guittot
2020-02-11 17:46 ` [RFC 4/4] sched/fair: Take into runnable_avg to classify group Vincent Guittot
2020-02-13 18:32   ` Valentin Schneider
2020-02-13 18:37     ` Valentin Schneider
2020-02-14  7:48       ` Vincent Guittot
2020-02-11 21:04 ` [PATCH 0/4] remove runnable_load_avg and improve group_classify Mel Gorman
2020-02-12  8:16   ` Vincent Guittot

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