From: Randy Dunlap <rdunlap@infradead.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Cc: 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>,
Quentin Perret <quentin.perret@arm.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 v4 07/16] sched/core: uclamp: extend cpu's cgroup controller
Date: Tue, 28 Aug 2018 11:29:00 -0700 [thread overview]
Message-ID: <ad7a1f15-d1ad-84f2-6b4d-cbfc4560a7a4@infradead.org> (raw)
In-Reply-To: <20180828135324.21976-8-patrick.bellasi@arm.com>
On 08/28/2018 06:53 AM, Patrick Bellasi wrote:
> +config UCLAMP_TASK_GROUP
> + bool "Utilization clamping per group of tasks"
> + depends on CGROUP_SCHED
> + depends on UCLAMP_TASK
> + default n
> + help
> + This feature enables the scheduler to track the clamped utilization
> + of each CPU based on RUNNABLE tasks currently scheduled on that CPU.
> +
> + When this option is enabled, the user can specify a min and max
> + CPU bandwidth which is allowed for each single task in a group.
> + The max bandwidth allows to clamp the maximum frequency a task
> + can use, while the min bandwidth allows to define a minimum
> + frequency a task will always use.
> +
> + When task group based utilization clamping is enabled, an eventually
> + specified task-specific clamp value is constrained by the cgroup
> + specified clamp value. Both minimum and maximum task clamping cannot
> + be bigger than the corresponding clamping defined at task group level.
The 4 lines above should all be indented the same (one tab + 2 spaces).
> +
> + If in doubt, say N.
> +
--
~Randy
next prev parent reply other threads:[~2018-08-28 18:29 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 13:53 [PATCH v4 00/16] Add utilization clamping support Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 01/16] sched/core: uclamp: extend sched_setattr to support utilization clamping Patrick Bellasi
2018-09-05 11:01 ` Juri Lelli
2018-08-28 13:53 ` [PATCH v4 02/16] sched/core: uclamp: map TASK's clamp values into CPU's clamp groups Patrick Bellasi
2018-09-05 10:45 ` Juri Lelli
2018-09-06 13:48 ` Patrick Bellasi
2018-09-06 14:13 ` Juri Lelli
2018-09-06 8:17 ` Juri Lelli
2018-09-06 14:00 ` Patrick Bellasi
2018-09-08 23:47 ` Suren Baghdasaryan
2018-09-12 10:32 ` Patrick Bellasi
2018-09-12 13:49 ` Peter Zijlstra
2018-09-12 15:56 ` Patrick Bellasi
2018-09-12 16:12 ` Peter Zijlstra
2018-09-12 17:35 ` Patrick Bellasi
2018-09-12 17:42 ` Peter Zijlstra
2018-09-12 17:52 ` Patrick Bellasi
2018-09-13 19:14 ` Peter Zijlstra
2018-09-14 8:51 ` Patrick Bellasi
2018-09-12 16:24 ` Peter Zijlstra
2018-09-12 17:42 ` Patrick Bellasi
2018-09-13 19:20 ` Peter Zijlstra
2018-09-14 8:47 ` Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 03/16] sched/core: uclamp: add CPU's clamp groups accounting Patrick Bellasi
2018-09-12 17:34 ` Peter Zijlstra
2018-09-12 17:44 ` Patrick Bellasi
2018-09-13 19:12 ` Peter Zijlstra
2018-09-14 9:07 ` Patrick Bellasi
2018-09-14 11:52 ` Peter Zijlstra
2018-09-14 13:41 ` Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 04/16] sched/core: uclamp: update CPU's refcount on clamp changes Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 05/16] sched/core: uclamp: enforce last task UCLAMP_MAX Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 06/16] sched/cpufreq: uclamp: add utilization clamping for FAIR tasks Patrick Bellasi
2018-09-14 9:32 ` Peter Zijlstra
2018-09-14 13:19 ` Patrick Bellasi
2018-09-14 13:36 ` Peter Zijlstra
2018-09-14 13:57 ` Patrick Bellasi
2018-09-27 10:23 ` Quentin Perret
2018-08-28 13:53 ` [PATCH v4 07/16] sched/core: uclamp: extend cpu's cgroup controller Patrick Bellasi
2018-08-28 18:29 ` Randy Dunlap [this message]
2018-08-29 8:53 ` Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 08/16] sched/core: uclamp: propagate parent clamps Patrick Bellasi
2018-09-09 3:02 ` Suren Baghdasaryan
2018-09-12 12:51 ` Patrick Bellasi
2018-09-12 15:56 ` Suren Baghdasaryan
2018-09-11 15:18 ` Tejun Heo
2018-09-11 16:26 ` Patrick Bellasi
2018-09-11 16:28 ` Tejun Heo
2018-08-28 13:53 ` [PATCH v4 09/16] sched/core: uclamp: map TG's clamp values into CPU's clamp groups Patrick Bellasi
2018-09-09 18:52 ` Suren Baghdasaryan
2018-09-12 14:19 ` Patrick Bellasi
2018-09-12 15:53 ` Suren Baghdasaryan
2018-08-28 13:53 ` [PATCH v4 10/16] sched/core: uclamp: use TG's clamps to restrict Task's clamps Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 11/16] sched/core: uclamp: add system default clamps Patrick Bellasi
2018-09-10 16:20 ` Suren Baghdasaryan
2018-09-11 16:46 ` Patrick Bellasi
2018-09-11 19:25 ` Suren Baghdasaryan
2018-08-28 13:53 ` [PATCH v4 12/16] sched/core: uclamp: update CPU's refcount on TG's clamp changes Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 13/16] sched/core: uclamp: use percentage clamp values Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 14/16] sched/core: uclamp: request CAP_SYS_ADMIN by default Patrick Bellasi
2018-09-04 13:47 ` Juri Lelli
2018-09-06 14:40 ` Patrick Bellasi
2018-09-06 14:59 ` Juri Lelli
2018-09-06 17:21 ` Patrick Bellasi
2018-09-14 11:10 ` Peter Zijlstra
2018-09-14 14:07 ` Patrick Bellasi
2018-09-14 14:28 ` Peter Zijlstra
2018-09-17 12:27 ` Patrick Bellasi
2018-09-21 9:13 ` Peter Zijlstra
2018-09-24 15:14 ` Patrick Bellasi
2018-09-24 15:56 ` Peter Zijlstra
2018-09-24 17:23 ` Patrick Bellasi
2018-09-24 16:26 ` Peter Zijlstra
2018-09-24 17:19 ` Patrick Bellasi
2018-09-25 15:49 ` Peter Zijlstra
2018-09-26 10:43 ` Patrick Bellasi
2018-09-27 10:00 ` Quentin Perret
2018-09-26 17:51 ` Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 15/16] sched/core: uclamp: add clamp group discretization support Patrick Bellasi
2018-08-28 13:53 ` [PATCH v4 16/16] sched/cpufreq: uclamp: add utilization clamping for RT tasks Patrick Bellasi
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