From: Joel Fernandes <joel@joelfernandes.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>, Tejun Heo <tj@kernel.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Paul Turner <pjt@google.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Juri Lelli <juri.lelli@redhat.com>, Todd Kjos <tkjos@google.com>,
Joel Fernandes <joelaf@google.com>,
Steve Muckle <smuckle@google.com>,
Suren Baghdasaryan <surenb@google.com>
Subject: Re: [PATCH v2 01/12] sched/core: uclamp: extend sched_setattr to support utilization clamping
Date: Wed, 18 Jul 2018 10:02:26 -0700 [thread overview]
Message-ID: <20180718170226.GA21148@joelaf.mtv.corp.google.com> (raw)
In-Reply-To: <20180718084218.GI32302@e110439-lin>
On Wed, Jul 18, 2018 at 09:42:18AM +0100, Patrick Bellasi wrote:
> On 17-Jul 10:50, Joel Fernandes wrote:
> > On Mon, Jul 16, 2018 at 09:28:55AM +0100, Patrick Bellasi wrote:
>
> [...]
>
> > > diff --git a/init/Kconfig b/init/Kconfig
> > > index 041f3a022122..1d45a6877d6f 100644
> > > --- a/init/Kconfig
> > > +++ b/init/Kconfig
> > > @@ -583,6 +583,25 @@ config HAVE_UNSTABLE_SCHED_CLOCK
> > > config GENERIC_SCHED_CLOCK
> > > bool
> > >
> > > +menu "Scheduler features"
> > > +
> > > +config UCLAMP_TASK
> > > + bool "Enable utilization clamping for RT/FAIR tasks"
> > > + depends on CPU_FREQ_GOV_SCHEDUTIL
> >
> > Does it make sense to depend on this? One could turn off schedutil and then
> > uclamp can't be used for any other purpose (big.LITTLE task placement etc)?
>
> You right, utilization clamping is _going_ to target tasks placement.
> But, the support currently posted in this series is just for OPP
> biasing. Thus, it would not make sense to enabled it when schedutil
> is not available.
>
> My idea was to keep this dependency while we finalize these bits.
> Once we move on to the tasks placement biasing, we will remove this
> dependency too.
>
> Does that makes sense?
Yes, that's fine with me.
next prev parent reply other threads:[~2018-07-18 17:02 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-16 8:28 [PATCH v2 00/12] Add utilization clamping support Patrick Bellasi
2018-07-16 8:28 ` [PATCH v2 01/12] sched/core: uclamp: extend sched_setattr to support utilization clamping Patrick Bellasi
2018-07-17 17:50 ` Joel Fernandes
2018-07-18 8:42 ` Patrick Bellasi
2018-07-18 17:02 ` Joel Fernandes [this message]
2018-07-17 18:04 ` Joel Fernandes
2018-07-16 8:28 ` [PATCH v2 02/12] sched/core: uclamp: map TASK's clamp values into CPU's clamp groups Patrick Bellasi
2018-07-19 23:51 ` Suren Baghdasaryan
2018-07-20 15:11 ` Patrick Bellasi
2018-07-21 0:25 ` Suren Baghdasaryan
2018-07-23 13:36 ` Patrick Bellasi
2018-07-16 8:28 ` [PATCH v2 03/12] sched/core: uclamp: add CPU's clamp groups accounting Patrick Bellasi
2018-07-20 20:25 ` Suren Baghdasaryan
2018-07-16 8:28 ` [PATCH v2 04/12] sched/core: uclamp: update CPU's refcount on clamp changes Patrick Bellasi
2018-07-16 8:28 ` [PATCH v2 05/12] sched/cpufreq: uclamp: add utilization clamping for FAIR tasks Patrick Bellasi
2018-07-16 8:29 ` [PATCH v2 06/12] sched/cpufreq: uclamp: add utilization clamping for RT tasks Patrick Bellasi
2018-07-16 8:29 ` [PATCH v2 07/12] sched/core: uclamp: enforce last task UCLAMP_MAX Patrick Bellasi
2018-07-21 1:23 ` Suren Baghdasaryan
2018-07-23 15:02 ` Patrick Bellasi
2018-07-23 16:40 ` Suren Baghdasaryan
2018-07-16 8:29 ` [PATCH v2 08/12] sched/core: uclamp: extend cpu's cgroup controller Patrick Bellasi
2018-07-21 2:37 ` Suren Baghdasaryan
2018-07-21 3:16 ` Suren Baghdasaryan
2018-07-23 15:17 ` Patrick Bellasi
2018-07-23 15:30 ` Tejun Heo
2018-07-23 17:22 ` Patrick Bellasi
2018-07-24 13:29 ` Tejun Heo
2018-07-24 15:39 ` Patrick Bellasi
2018-07-27 0:39 ` Joel Fernandes
2018-07-27 8:09 ` Quentin Perret
2018-07-16 8:29 ` [PATCH v2 09/12] sched/core: uclamp: map TG's clamp values into CPU's clamp groups Patrick Bellasi
2018-07-16 8:29 ` [PATCH v2 10/12] sched/core: uclamp: use TG's clamps to restrict Task's clamps Patrick Bellasi
2018-07-22 3:05 ` Suren Baghdasaryan
2018-07-23 15:40 ` Patrick Bellasi
2018-07-23 17:11 ` Suren Baghdasaryan
2018-07-24 9:56 ` Patrick Bellasi
2018-07-24 15:28 ` Suren Baghdasaryan
2018-07-24 15:49 ` Patrick Bellasi
2018-07-16 8:29 ` [PATCH v2 11/12] sched/core: uclamp: update CPU's refcount on TG's clamp changes Patrick Bellasi
2018-07-22 3:17 ` Suren Baghdasaryan
2018-07-16 8:29 ` [PATCH v2 12/12] sched/core: uclamp: use percentage clamp values Patrick Bellasi
2018-07-22 4:04 ` Suren Baghdasaryan
2018-07-24 16:43 ` Patrick Bellasi
2018-07-24 17:11 ` Suren Baghdasaryan
2018-07-24 17:17 ` Patrick Bellasi
2018-07-17 13:03 ` [PATCH v2 00/12] Add utilization clamping support Joel Fernandes
2018-07-17 13:41 ` Patrick Bellasi
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