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Re: [PATCH v2 10/10] cpufreq: schedutil: New governor based on scheduler utilization data

From "Rafael J. Wysocki" <rafael@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH v2 10/10] cpufreq: schedutil: New governor based on scheduler utilization data
Date 2016-03-04 14:20 +0100
Message-ID <r8XOa-7kY-1@gated-at.bofh.it> (permalink)
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On Fri, Mar 4, 2016 at 12:26 PM, Juri Lelli <juri.lelli@arm.com> wrote:
> Hi Rafael,

Hi,

> On 04/03/16 04:35, Rafael J. Wysocki wrote:
>> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>>
>> Add a new cpufreq scaling governor, called "schedutil", that uses
>> scheduler-provided CPU utilization information as input for making
>> its decisions.
>>
>> Doing that is possible after commit fe7034338ba0 (cpufreq: Add
>> mechanism for registering utilization update callbacks) that
>> introduced cpufreq_update_util() called by the scheduler on
>> utilization changes (from CFS) and RT/DL task status updates.
>> In particular, CPU frequency scaling decisions may be based on
>> the the utilization data passed to cpufreq_update_util() by CFS.
>>
>> The new governor is relatively simple.
>>
>> The frequency selection formula used by it is
>>
>>       next_freq = util * max_freq / max
>>
>> where util and max are the utilization and CPU capacity coming from CFS.
>>
>
> The formula looks better to me now. However, problem is that, if you
> have freq. invariance, util will slowly saturate to the current
> capacity. So, we won't trigger OPP changes for a task that for example
> starts light and then becomes big.
>
> This is the same problem we faced with schedfreq. The current solution
> there is to use a margin for calculating a threshold (80% of current
> capacity ATM). Once util goes above that threshold we trigger an OPP
> change.  Current policy is pretty aggressive, we go to max_f and then
> adapt to the "real" util during successive enqueues. This was also
> tought to cope with the fact that PELT seems slow to react to abrupt
> changes in tasks behaviour.
>
> I'm not saying this is the definitive solution, but I fear something
> along this line is needed when you add freq invariance in the mix.

I really would like to avoid adding factors that need to be determined
experimentally, because the result of that tends to depend on the
system where the experiment is carried out and tunables simply don't
work (99% or maybe even more users don't change the defaults anyway).

So I would really like to use a formula that's based on some science
and doesn't depend on additional input.

Now, since the equation generally is f = a * x + b (f - frequency, x =
util/max) and there are good arguments for b = 0, it all boils down to
what number to take as a.  a = max_freq is a good candidate (that's
what I'm using right now), but it may turn out to be too small.
Another reasonable candidate is a = min_freq + max_freq, because then
x = 0.5 selects the frequency in the middle of the available range,
but that may turn out to be way too big if min_freq is high (like
higher that 50% of max_freq).

I need to think more about that and admittedly my understanding of the
frequency invariance consequences is limited ATM.

Thanks,
Rafael

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[PATCH 0/6] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-02 03:30 +0100
  [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-02 03:30 +0100
    Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Vincent Guittot <vincent.guittot@linaro.org> - 2016-03-02 18:20 +0100
      Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-02 19:00 +0100
        Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-02 23:50 +0100
          Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 13:30 +0100
            Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-03 13:40 +0100
            Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-03 17:30 +0100
              Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 17:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 17:50 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 02:20 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 18:00 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-03 18:20 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-03 18:00 +0100
          Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Vincent Guittot <vincent.guittot@linaro.org> - 2016-03-03 15:10 +0100
            Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 16:40 +0100
              Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 17:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 17:50 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-03-03 18:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-03 19:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-03-03 20:20 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-08 14:20 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-03 20:00 +0100
        Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Vincent Guittot <vincent.guittot@linaro.org> - 2016-03-03 14:10 +0100
          Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-03 21:10 +0100
            Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-03 21:30 +0100
              Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-03 22:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-07 03:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-08 12:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-08 19:10 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-08 20:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-08 21:10 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-09 11:20 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-10 00:50 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-10 05:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-10 22:10 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Michael Turquette <mturquette@baylibre.com> - 2016-03-11 00:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-09 17:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-10 00:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Vincent Guittot <vincent.guittot@linaro.org> - 2016-03-10 04:50 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-10 11:10 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Vincent Guittot <vincent.guittot@linaro.org> - 2016-03-10 11:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-10 11:40 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-10 12:00 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-10 23:30 +0100
                Re: [PATCH 6/6] cpufreq: schedutil: New governor based on scheduler  utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-10 09:50 +0100
  [PATCH v2 10/10] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    Re: [PATCH v2 10/10] cpufreq: schedutil: New governor based on  scheduler utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-04 12:30 +0100
      Re: [PATCH v2 10/10] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 14:20 +0100
      Re: [PATCH v2 10/10] cpufreq: schedutil: New governor based on  scheduler utilization data Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-04 17:00 +0100
  [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Steve Muckle <steve.muckle@linaro.org> - 2016-03-04 23:20 +0100
      Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 23:40 +0100
        Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 23:50 +0100
          Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-05 00:20 +0100
            Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Steve Muckle <steve.muckle@linaro.org> - 2016-03-05 01:00 +0100
              Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-05 01:20 +0100
                Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Ingo Molnar <mingo@kernel.org> - 2016-03-05 13:00 +0100
            Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-05 17:50 +0100
              Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-06 03:20 +0100
                Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-07 09:10 +0100
                Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-07 14:20 +0100
                Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-07 14:40 +0100
                Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-07 14:50 +0100
        Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-05 00:00 +0100
          Re: [PATCH v2 6/10] cpufreq: Support for fast frequency switching Steve Muckle <steve.muckle@linaro.org> - 2016-03-05 01:00 +0100
  [PATCH v2 0/10] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a bit "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
      Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a  bit Peter Zijlstra <peterz@infradead.org> - 2016-03-09 13:50 +0100
        Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a bit "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-09 15:20 +0100
          Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a  bit Peter Zijlstra <peterz@infradead.org> - 2016-03-09 16:30 +0100
            Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a bit "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-09 22:40 +0100
              Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a  bit Peter Zijlstra <peterz@infradead.org> - 2016-03-10 10:20 +0100
    [PATCH v2 5/10] cpufreq: Move governor attribute set headers to cpufreq.h "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
      Re: [PATCH v2 5/10] cpufreq: Move governor attribute set headers to  cpufreq.h Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-04 07:00 +0100
    [PATCH v2 2/10][Resend] cpufreq: acpi-cpufreq: Make read and write operations more efficient "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    [PATCH v2 3/10] cpufreq: governor: New data type for management part of dbs_data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
      Re: [PATCH v2 3/10] cpufreq: governor: New data type for management  part of dbs_data Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-04 07:00 +0100
    [PATCH v2 7/10] cpufreq: Rework the scheduler hooks for triggering updates "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    [PATCH v2 4/10] cpufreq: governor: Move abstract gov_attr_set code to seperate file "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
      Re: [PATCH v2 4/10] cpufreq: governor: Move abstract gov_attr_set  code to seperate file Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-04 07:00 +0100
    [PATCH v2 8/10] cpufreq: Move scheduler-related code to the sched directory "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
    [PATCH v2 9/10] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 04:40 +0100
      Re: [PATCH v2 9/10] cpufreq: sched: Re-introduce  cpufreq_update_util() Juri Lelli <juri.lelli@arm.com> - 2016-03-04 11:50 +0100
        Re: [PATCH v2 9/10] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 14:00 +0100
      [PATCH v3 9/10] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-04 14:30 +0100
        Re: [PATCH v3 9/10] cpufreq: sched: Re-introduce  cpufreq_update_util() Steve Muckle <steve.muckle@linaro.org> - 2016-03-04 22:30 +0100
          Re: [PATCH v3 9/10] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 22:30 +0100
            Re: [PATCH v3 9/10] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-04 22:40 +0100
    [PATCH v3 5/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
    [PATCH v3 3/7][Resend] cpufreq: governor: New data type for management part of dbs_data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
    [PATCH v3 6/7] cpufreq: sched: Re-introduce cpufreq_update_util() "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
    [PATCH v3 4/7][Resend] cpufreq: governor: Move abstract gov_attr_set code to seperate file "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
    [PATCH v3 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
      [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for triggering updates "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
        Re: [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for  triggering updates Peter Zijlstra <peterz@infradead.org> - 2016-03-09 14:50 +0100
          Re: [PATCH v3 1/7][Resend] cpufreq: Rework the scheduler hooks for  triggering updates "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-09 15:10 +0100
      [PATCH v3 2/7][Resend] cpufreq: Move scheduler-related code to the sched directory "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
      [PATCH v3 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-08 04:00 +0100
      [PATCH v4 2/7] cpufreq: governor: New data type for management part of dbs_data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
      [PATCH v4 1/7] cpufreq: sched: Helpers to add and remove update_util hooks "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
      [PATCH v4 4/7] cpufreq: Move governor attribute set headers to cpufreq.h "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
      [PATCH v4 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
        [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 18:40 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:50 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 18:40 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:00 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:50 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:00 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
              Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 23:40 +0100
          Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 19:20 +0100
            Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 22:40 +0100
              Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-16 23:50 +0100
                Re: [PATCH v4 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 00:00 +0100
        [PATCH v4 3/7] cpufreq: governor: Move abstract gov_attr_set code to seperate file "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
        [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
          Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:40 +0100
            Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 18:00 +0100
          Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:50 +0100
            Re: [PATCH v4 6/7] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 18:00 +0100
        [PATCH v4 5/7] cpufreq: Move governor symbols to cpufreq.h "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-16 16:10 +0100
        Re: [PATCH v4 0/7] cpufreq: schedutil governor Peter Zijlstra <peterz@infradead.org> - 2016-03-16 16:30 +0100
          Re: [PATCH v4 0/7] cpufreq: schedutil governor "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-16 17:30 +0100
        [PATCH v5 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 01:00 +0100
          Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:40 +0100
            Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:50 +0100
              Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
            Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency  switching Peter Zijlstra <peterz@infradead.org> - 2016-03-17 12:50 +0100
        [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 01:00 +0100
          Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-17 12:40 +0100
            Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
          Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data Juri Lelli <juri.lelli@arm.com> - 2016-03-17 12:40 +0100
            Re: [PATCH v5 7/7][Update] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-17 14:00 +0100
        [PATCH v6 6/7][Update] cpufreq: Support for fast frequency switching "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 17:00 +0100
        [PATCH v6 7/7][Update] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-17 17:10 +0100

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