From: Juri Lelli <juri.lelli@redhat.com>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
"open list:THERMAL" <linux-pm@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Joel Fernandes <joelaf@google.com>,
Steve Muckle <smuckle@google.com>, Todd Kjos <tkjos@google.com>
Subject: Re: [PATCH 2/2] sched/fair: util_est: add running_sum tracking
Date: Tue, 5 Jun 2018 17:31:05 +0200 [thread overview]
Message-ID: <20180605153105.GM16081@localhost.localdomain> (raw)
In-Reply-To: <20180605151129.GC32302@e110439-lin>
On 05/06/18 16:11, Patrick Bellasi wrote:
[...]
> If I run an experiment with your example above, while using the
> performance governor to rule out any possible scale invariance
> difference, here is what I measure:
>
> Task1 (40ms delayed by the following Task2):
> mean std max
> running_avg 455.387449 22.940168 492.0
> util_avg 433.233288 17.395477 458.0
>
> Task2 (waking up at same time of Task1 and running before):
> mean std max
> running_avg 430.281834 22.405175 455.0
> util_avg 421.745331 22.098873 456.0
>
> and if I compare Task1 above with another experiment where Task1 is
> running alone:
>
> Task1 (running alone):
> mean std min
> running_avg 460.257895 22.103704 460.0
> util_avg 435.119737 17.647556 461.0
Wait, why again in this last case running_avg != util_avg? :)
next prev parent reply other threads:[~2018-06-05 15:31 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-04 16:05 [PATCH 0/2] Improve estimated utilization of preempted FAIR tasks Patrick Bellasi
2018-06-04 16:05 ` [PATCH 1/2] sched/fair: pelt: use u32 for util_avg Patrick Bellasi
2018-06-05 1:30 ` kbuild test robot
2018-06-05 1:34 ` kbuild test robot
2018-06-04 16:06 ` [PATCH 2/2] sched/fair: util_est: add running_sum tracking Patrick Bellasi
2018-06-04 17:46 ` Joel Fernandes
2018-06-05 15:21 ` Patrick Bellasi
2018-06-05 19:33 ` Joel Fernandes
2018-06-05 19:43 ` Joel Fernandes
2018-06-05 1:29 ` kbuild test robot
2018-06-05 6:57 ` Vincent Guittot
2018-06-05 15:11 ` Patrick Bellasi
2018-06-05 15:31 ` Juri Lelli [this message]
2018-06-05 16:54 ` Patrick Bellasi
2018-06-05 20:46 ` Joel Fernandes
2018-06-05 23:15 ` Saravana Kannan
2018-06-06 8:26 ` Vincent Guittot
2018-06-06 10:38 ` Patrick Bellasi
2018-06-05 10:46 ` kbuild test robot
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