linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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
Subject: Re: [PATCH v6 0/2] sched/fair: update scale invariance of PELT
Date: Mon, 12 Nov 2018 18:58:13 -0800	[thread overview]
Message-ID: <e873dfbb-d13e-93c7-251e-dea90c3b40b5@arm.com> (raw)
In-Reply-To: <1541780454-9934-1-git-send-email-vincent.guittot@linaro.org>

On 11/9/18 8:20 AM, Vincent Guittot wrote:
> This new version of the scale invariance patchset adds an important change
> compare to v3 and before. It still scales the time to reflect the
> amount of work that has been done during the elapsed running time but this is
> now done at rq level instead of per entity and rt/dl/cfs_rq. The main
> advantage is that it is done once per clock update and we don't need to
> maintain per sched_avg's stolen_idle_time anymore. This also ensures that
> all pelt signals will be always synced for a rq.
> 
> The 1st patch makes available rq_of() helper function for pelt.c file and
> the 2nd patch implements the new scaling algorithm
> 
> Changes since v5:
> - Fix running_sum scaling in update_tg_cfs_runnable() raised by Dietmar
> - Remove unused cpu parameters raised by Dietmar

I just re-discovered ... the comment for the definition of struct 
sched_avg in include/linux/sched.h also mentioned the different ways how 
we do invariance for load_avg and util_avg.

[...]

      parent reply	other threads:[~2018-11-13  2:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-09 16:20 [PATCH v6 0/2] sched/fair: update scale invariance of PELT Vincent Guittot
2018-11-09 16:20 ` [PATCH v6 1/2] sched/fair: move rq_of helper function Vincent Guittot
2018-11-09 16:20 ` [PATCH v6 2/2] sched/fair: update scale invariance of PELT Vincent Guittot
2018-11-13  2:53   ` Dietmar Eggemann
2018-11-14 23:56     ` Vincent Guittot
2018-11-13  2:58 ` Dietmar Eggemann [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=e873dfbb-d13e-93c7-251e-dea90c3b40b5@arm.com \
    --to=dietmar.eggemann@arm.com \
    --cc=Morten.Rasmussen@arm.com \
    --cc=bsegall@google.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=patrick.bellasi@arm.com \
    --cc=peterz@infradead.org \
    --cc=pjt@google.com \
    --cc=pkondeti@codeaurora.org \
    --cc=quentin.perret@arm.com \
    --cc=rjw@rjwysocki.net \
    --cc=thara.gopinath@linaro.org \
    --cc=vincent.guittot@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).