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From: Peter Zijlstra <peterz@infradead.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: Tejun Heo <tj@kernel.org>,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Paul Turner <pjt@google.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	John Stultz <john.stultz@linaro.org>,
	Todd Kjos <tkjos@android.com>, Tim Murray <timmurray@google.com>,
	Andres Oportus <andresoportus@google.com>,
	Joel Fernandes <joelaf@google.com>,
	Juri Lelli <juri.lelli@arm.com>,
	Chris Redpath <chris.redpath@arm.com>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>
Subject: Re: [RFC v3 0/5] Add capacity capping support to the CPU controller
Date: Wed, 12 Apr 2017 14:15:14 +0200	[thread overview]
Message-ID: <20170412121514.GE3093@worktop> (raw)
In-Reply-To: <20170411175833.GI29455@e110439-lin>

On Tue, Apr 11, 2017 at 06:58:33PM +0100, Patrick Bellasi wrote:
> We should consider also that at the CPUFreq side we already expose
> knobs like scaling_{min,max}_freq which are much more platform
> dependant than capacity.

So I've always objected to these knobs.

That said; they are a pre-existing user interface so changing them isn't
really feasible much.

But at the very least we should integrate them properly. Which for
schedutil would mean they have to directly modify the relevant CPU
capacity values. Is this currently done? (I think not.)

  parent reply	other threads:[~2017-04-12 12:15 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-28 14:38 [RFC v3 0/5] Add capacity capping support to the CPU controller Patrick Bellasi
2017-02-28 14:38 ` [RFC v3 1/5] sched/core: add capacity constraints to " Patrick Bellasi
2017-03-13 10:46   ` Joel Fernandes (Google)
2017-03-15 11:20     ` Patrick Bellasi
2017-03-15 13:20       ` Joel Fernandes
2017-03-15 16:10         ` Paul E. McKenney
2017-03-15 16:44           ` Patrick Bellasi
2017-03-15 17:24             ` Paul E. McKenney
2017-03-15 17:57               ` Patrick Bellasi
2017-03-20 17:15   ` Tejun Heo
2017-03-20 17:36     ` Tejun Heo
2017-03-20 18:08     ` Patrick Bellasi
2017-03-23  0:28       ` Joel Fernandes (Google)
2017-03-23 10:32         ` Patrick Bellasi
2017-03-23 16:01           ` Tejun Heo
2017-03-23 18:15             ` Patrick Bellasi
2017-03-23 18:39               ` Tejun Heo
2017-03-24  6:37                 ` Joel Fernandes (Google)
2017-03-24 15:00                   ` Tejun Heo
2017-03-30 21:13                 ` Paul Turner
2017-03-24  7:02           ` Joel Fernandes (Google)
2017-03-30 21:15       ` Paul Turner
2017-04-01 16:25         ` Patrick Bellasi
2017-02-28 14:38 ` [RFC v3 2/5] sched/core: track CPU's capacity_{min,max} Patrick Bellasi
2017-02-28 14:38 ` [RFC v3 3/5] sched/core: sync capacity_{min,max} between slow and fast paths Patrick Bellasi
2017-02-28 14:38 ` [RFC v3 4/5] sched/{core,cpufreq_schedutil}: add capacity clamping for FAIR tasks Patrick Bellasi
2017-02-28 14:38 ` [RFC v3 5/5] sched/{core,cpufreq_schedutil}: add capacity clamping for RT/DL tasks Patrick Bellasi
2017-03-13 10:08   ` Joel Fernandes (Google)
2017-03-15 11:40     ` Patrick Bellasi
2017-03-15 12:59       ` Joel Fernandes
2017-03-15 14:44         ` Juri Lelli
2017-03-15 16:13           ` Joel Fernandes
2017-03-15 16:24             ` Juri Lelli
2017-03-15 23:40               ` Joel Fernandes
2017-03-16 11:16                 ` Juri Lelli
2017-03-16 12:27                   ` Patrick Bellasi
2017-03-16 12:44                     ` Juri Lelli
2017-03-16 16:58                       ` Joel Fernandes
2017-03-16 17:17                         ` Juri Lelli
2017-03-15 11:41 ` [RFC v3 0/5] Add capacity capping support to the CPU controller Rafael J. Wysocki
2017-03-15 12:59   ` Patrick Bellasi
2017-03-16  1:04     ` Rafael J. Wysocki
2017-03-16  3:15       ` Joel Fernandes
2017-03-20 22:51         ` Rafael J. Wysocki
2017-03-21 11:01           ` Patrick Bellasi
2017-03-24 23:52             ` Rafael J. Wysocki
2017-03-16 12:23       ` Patrick Bellasi
2017-03-20 14:51 ` Tejun Heo
2017-03-20 17:22   ` Patrick Bellasi
2017-04-10  7:36     ` Peter Zijlstra
2017-04-11 17:58       ` Patrick Bellasi
2017-04-12 12:10         ` Peter Zijlstra
2017-04-12 13:55           ` Patrick Bellasi
2017-04-12 15:37             ` Peter Zijlstra
2017-04-13 11:33               ` Patrick Bellasi
2017-04-12 12:15         ` Peter Zijlstra [this message]
2017-04-12 13:34           ` Patrick Bellasi
2017-04-12 14:41             ` Peter Zijlstra
2017-04-12 12:22         ` Peter Zijlstra
2017-04-12 13:24           ` Patrick Bellasi
2017-04-12 12:48         ` Peter Zijlstra
2017-04-12 13:27           ` Patrick Bellasi
2017-04-12 14:34             ` Peter Zijlstra
2017-04-12 14:43               ` Patrick Bellasi
2017-04-12 16:14                 ` Peter Zijlstra
2017-04-13 10:34                   ` Patrick Bellasi

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