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From: Quentin Perret <quentin.perret@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"open list:THERMAL" <linux-pm@vger.kernel.org>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
	Ingo Molnar <mingo@redhat.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Chris Redpath <chris.redpath@arm.com>,
	Patrick Bellasi <patrick.bellasi@arm.com>,
	Valentin Schneider <valentin.schneider@arm.com>,
	Thara Gopinath <thara.gopinath@linaro.org>,
	viresh kumar <viresh.kumar@linaro.org>,
	Todd Kjos <tkjos@google.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	"Cc: Steve Muckle" <smuckle@google.com>,
	adharmap@quicinc.com, "Kannan, Saravana" <skannan@quicinc.com>,
	pkondeti@codeaurora.org, Juri Lelli <juri.lelli@redhat.com>,
	Eduardo Valentin <edubezval@gmail.com>,
	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
	currojerez@riseup.net, Javi Merino <javi.merino@kernel.org>
Subject: Re: [RFC PATCH v4 03/12] PM: Introduce an Energy Model management framework
Date: Fri, 6 Jul 2018 11:06:47 +0100	[thread overview]
Message-ID: <20180706100647.GB11862@e108498-lin.cambridge.arm.com> (raw)
In-Reply-To: <20180706100353.GU2476@hirez.programming.kicks-ass.net>

On Friday 06 Jul 2018 at 12:03:53 (+0200), Peter Zijlstra wrote:
> On Fri, Jul 06, 2018 at 11:57:37AM +0200, Vincent Guittot wrote:
> > 
> > IIUC the formula above, you consider that all CPUs in a frequency
> > domain has the same capacity. This sounds a reasonable assumption but
> > it would be good to write that somewhere
> 
> Yes, I think there used to be a WARN and kill EM for that, but I cannot
> seem to locate that in the current code.

There is something if the EM is too complex to be used by the scheduler.
But nothing about that assumption (yet).

I'll fix that in v5

Thanks,
Quentin

  reply	other threads:[~2018-07-06 10:09 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-28 11:40 [RFC PATCH v4 00/12] Energy Aware Scheduling Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 01/12] sched: Relocate arch_scale_cpu_capacity Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 02/12] sched/cpufreq: Factor out utilization to frequency mapping Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 03/12] PM: Introduce an Energy Model management framework Quentin Perret
2018-07-05 14:31   ` Peter Zijlstra
2018-07-05 15:24     ` Quentin Perret
2018-07-05 14:39   ` Peter Zijlstra
2018-07-05 15:09     ` Quentin Perret
2018-07-05 15:06   ` Peter Zijlstra
2018-07-05 15:32     ` Quentin Perret
2018-07-06  9:57   ` Vincent Guittot
2018-07-06 10:03     ` Peter Zijlstra
2018-07-06 10:06       ` Quentin Perret [this message]
2018-07-06 10:05     ` Quentin Perret
2018-07-09 18:07   ` Dietmar Eggemann
2018-07-10  8:32     ` Quentin Perret
2018-07-16 10:29       ` Quentin Perret
2018-07-17  8:57         ` Dietmar Eggemann
2018-07-17 14:19           ` Quentin Perret
2018-07-17 16:00             ` Dietmar Eggemann
2018-06-28 11:40 ` [RFC PATCH v4 04/12] PM / EM: Expose the Energy Model in sysfs Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 05/12] sched/topology: Reference the Energy Model of CPUs when available Quentin Perret
2018-07-05 17:29   ` Peter Zijlstra
2018-07-05 17:48     ` Quentin Perret
2018-07-05 17:33   ` Peter Zijlstra
2018-07-05 17:50     ` Quentin Perret
2018-07-05 18:14       ` Peter Zijlstra
2018-06-28 11:40 ` [RFC PATCH v4 06/12] sched/topology: Lowest energy aware balancing sched_domain level pointer Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 07/12] sched/topology: Introduce sched_energy_present static key Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 08/12] sched: Add over-utilization/tipping point indicator Quentin Perret
2018-07-06 11:32   ` Peter Zijlstra
2018-07-06 13:20     ` Quentin Perret
2018-07-06 13:24       ` Peter Zijlstra
2018-07-06 13:40         ` Quentin Perret
2018-07-06 11:39   ` Peter Zijlstra
2018-07-06 11:41   ` Peter Zijlstra
2018-07-06 11:49     ` Valentin Schneider
2018-06-28 11:40 ` [RFC PATCH v4 09/12] sched/fair: Introduce an energy estimation helper function Quentin Perret
2018-07-06 13:12   ` Peter Zijlstra
2018-07-06 15:12     ` Quentin Perret
2018-07-06 15:49       ` Peter Zijlstra
2018-07-06 17:04         ` Quentin Perret
2018-07-09 12:01           ` Peter Zijlstra
2018-07-09 15:28             ` Quentin Perret
2018-07-09 15:42               ` Peter Zijlstra
2018-07-09 16:07                 ` Quentin Perret
2018-07-06 15:50       ` Peter Zijlstra
2018-06-28 11:40 ` [RFC PATCH v4 10/12] sched/fair: Select an energy-efficient CPU on task wake-up Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 11/12] OPTIONAL: arch_topology: Start Energy Aware Scheduling Quentin Perret
2018-06-28 11:40 ` [RFC PATCH v4 12/12] OPTIONAL: cpufreq: dt: Register an Energy Model Quentin Perret
2018-07-06 10:10   ` Vincent Guittot
2018-07-06 10:18     ` Quentin Perret
2018-07-30 15:53       ` Vincent Guittot
2018-07-30 16:20         ` Quentin Perret

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