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Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on scheduler utilization data

From Steve Muckle <steve.muckle@linaro.org>
Newsgroups linux.kernel
Subject Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on scheduler utilization data
Date 2016-04-01 21:30 +0200
Message-ID <rjcVA-wc-29@gated-at.bofh.it> (permalink)
References <rfjLX-5N2-3@gated-at.bofh.it> <rfjLX-5N2-1@gated-at.bofh.it> <ridAl-6zf-1@gated-at.bofh.it> <rjbmN-7Po-1@gated-at.bofh.it> <rjcLU-sT-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 04/01/2016 12:14 PM, Rafael J. Wysocki wrote:
> On Fri, Apr 1, 2016 at 7:49 PM, Steve Muckle <steve.muckle@linaro.org> wrote:
>> On 03/29/2016 07:00 PM, Rafael J. Wysocki wrote:
>> ...
>>> +config CPU_FREQ_GOV_SCHEDUTIL
>>> +     tristate "'schedutil' cpufreq policy governor"
>>> +     depends on CPU_FREQ
>>> +     select CPU_FREQ_GOV_ATTR_SET
>>> +     select IRQ_WORK
>>> +     help
>>> +       This governor makes decisions based on the utilization data provided
>>> +       by the scheduler.  It sets the CPU frequency to be proportional to
>>> +       the utilization/capacity ratio coming from the scheduler.  If the
>>> +       utilization is frequency-invariant, the new frequency is also
>>> +       proportional to the maximum available frequency.  If that is not the
>>> +       case, it is proportional to the current frequency of the CPU with the
>>> +       tipping point at utilization/capacity equal to 80%.
>>
>> This help text implies that the tipping point of 80% applies only to
>> non-frequency invariant configurations, rather than both. Possible to
>> rephrase?
> 
> Sure.
> 
> What about:
> 
> "If that is not the case, it is proportional to the current frequency
> of the CPU.  The frequency tipping point is at utilization/capacity
> equal to 80% in both cases."

LGTM

thanks,
Steve

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[PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-22 03:00 +0100
  Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-26 02:20 +0100
    Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-26 03:10 +0100
      Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-27 03:40 +0200
        Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-28 20:20 +0200
          Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-29 14:30 +0200
          Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-31 14:30 +0200
            Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-31 14:40 +0200
              Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-04-01 20:20 +0200
  Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-28 11:10 +0200
    Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-29 15:00 +0200
      Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-30 03:20 +0200
        Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-31 14:30 +0200
      Re: [PATCH v6 7/7][Resend] cpufreq: schedutil: New governor based on  scheduler utilization data Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-30 06:20 +0200
  [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-30 04:00 +0200
    Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Viresh Kumar <viresh.kumar@linaro.org> - 2016-03-30 07:40 +0200
      Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-30 13:40 +0200
        Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-30 19:10 +0200
          Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-30 19:30 +0200
            Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-03-31 03:50 +0200
    Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-31 14:20 +0200
      Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-31 14:20 +0200
        Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-31 14:50 +0200
    Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Peter Zijlstra <peterz@infradead.org> - 2016-03-31 14:50 +0200
    Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-04-01 19:50 +0200
      Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data "Rafael J. Wysocki" <rafael@kernel.org> - 2016-04-01 21:20 +0200
        Re: [Update][PATCH v7 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-04-01 21:30 +0200
    [Update][PATCH v8 7/7] cpufreq: schedutil: New governor based on scheduler utilization data "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-04-02 01:10 +0200
      Re: [Update][PATCH v8 7/7] cpufreq: schedutil: New governor based on  scheduler utilization data Steve Muckle <steve.muckle@linaro.org> - 2016-04-02 03:10 +0200

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