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From: Patrick Bellasi <patrick.bellasi@arm.com>
To: 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>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Viresh Kumar <viresh.kumar@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>,
	Alessio Balsini <balsini@android.com>
Subject: Re: [PATCH v10 00/16] Add utilization clamping support
Date: Fri, 21 Jun 2019 15:55:32 +0100
Message-ID: <20190621145532.dvghqs32zprl6ty2@e110439-lin> (raw)
In-Reply-To: <20190621084217.8167-1-patrick.bellasi@arm.com>

On 21-Jun 09:42, Patrick Bellasi wrote:
> Hi all, this is a respin of:
> 
>   https://lore.kernel.org/lkml/20190515094459.10317-1-patrick.bellasi@arm.com/
> 
> which addresses all Tejun's concerns:
> 
>  - rename cgroup attributes to be cpu.uclamp.{min,max}
>  - update initialization of subgroups clamps to be "no clamps" by default
>  - use percentage rational numbers for clamp attributes, e.g. "12.34" for 12.34%.
> 
> by introducing modifications impacting only patches:
> 
>  [PATCH v10 12/16] sched/core: uclamp: Extend CPU's cgroup controller
>  [PATCH v10 13/16] sched/core: uclamp: Propagate parent clamps
> 
> The rest of the patches are the same as per in v9, they have been just rebased
> on top of:
> 
>    tj/cgroup.git	for-5.3
>    tip/tip.git		sched/core
> 
> AFAIU, all the first 11 patches have been code reviewed and should be at a
> "ready to merge" quality level. Please let me know if I'm wrong and there
> is something else I need/can to do on those patches.
> 
> Otherwise, now that we should have settled all the behavioral aspects, I'm

Regarding the behavioral aspects, here I have a report with some
simple tests for the current implementation:

   https://gist.github.com/derkling/519459b5a2be35d8681fbaf1d6efe225

There are a couple of sections at the end to test the "Delegation
Model" with both CGroups v1 and v2.

I'm sharing the link just in case it can be helpful to verify if what
has been implemented is actually matching what Tejun expects as a sane
cgroups interface.

Cheers,
Patrick

-- 
#include <best/regards.h>

Patrick Bellasi

      parent reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-21  8:42 Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 01/16] sched/core: uclamp: Add CPU's clamp buckets refcounting Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 02/16] sched/core: uclamp: Add bucket local max tracking Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 03/16] sched/core: uclamp: Enforce last task's UCLAMP_MAX Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 04/16] sched/core: uclamp: Add system default clamps Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 05/16] sched/core: Allow sched_setattr() to use the current policy Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 06/16] sched/core: uclamp: Extend sched_setattr() to support utilization clamping Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 07/16] sched/core: uclamp: Reset uclamp values on RESET_ON_FORK Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 08/16] sched/core: uclamp: Set default clamps for RT tasks Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 09/16] sched/cpufreq: uclamp: Add clamps for FAIR and " Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 10/16] sched/core: uclamp: Add uclamp_util_with() Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 11/16] sched/fair: uclamp: Add uclamp support to energy_compute() Patrick Bellasi
2019-06-21 14:01   ` Peter Zijlstra
2019-06-21 14:47     ` Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 12/16] sched/core: uclamp: Extend CPU's cgroup controller Patrick Bellasi
2019-06-22 15:03   ` Tejun Heo
2019-06-24 17:29     ` Patrick Bellasi
2019-06-24 17:52       ` Tejun Heo
2019-06-25  9:31         ` Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 13/16] sched/core: uclamp: Propagate parent clamps Patrick Bellasi
2019-06-22 15:07   ` Tejun Heo
2019-06-24 17:34     ` Patrick Bellasi
2019-06-24 17:46       ` Tejun Heo
2019-06-21  8:42 ` [PATCH v10 14/16] sched/core: uclamp: Propagate system defaults to root group Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 15/16] sched/core: uclamp: Use TG's clamps to restrict TASK's clamps Patrick Bellasi
2019-06-21  8:42 ` [PATCH v10 16/16] sched/core: uclamp: Update CPU's refcount on TG's clamp changes Patrick Bellasi
2019-06-21 14:55 ` Patrick Bellasi [this message]

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