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RE: [intel-pstate driver regression] processor frequency very high even if in idle

From "Doug Smythies" <dsmythies@telus.net>
Newsgroups linux.kernel
Subject RE: [intel-pstate driver regression] processor frequency very high even if in idle
Date 2016-04-03 21:10 +0200
Message-ID <rjVzk-83s-25@gated-at.bofh.it> (permalink)
References (5 earlier) <rjn4B-83d-1@gated-at.bofh.it> <rjvOx-5Qg-3@gated-at.bofh.it> <rjvOx-5Qg-1@gated-at.bofh.it> <rjxnk-74U-19@gated-at.bofh.it> <rjyt4-7PW-25@gated-at.bofh.it>
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On 2016.04.02 11:21 Sedat Dilek wrote:
> On Sat, Apr 2, 2016 at 7:19 PM, Jörg Otte wrote:
>> 2016-04-02 17:28 GMT+02:00 Srinivas Pandruvada wrote:
>>>
>>> If you are using Ubuntu, the OS has a script which will automatically
>>> change from performance.
>>> Doug can give more information on this script.
>
>> maybe:
>> /etc/init.d/ondemand

Yes.

> With CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y (linux-pm.git#linux-next) I get...
>
> $ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
> acpi-cpufreq
> acpi-cpufreq
> acpi-cpufreq
> acpi-cpufreq
>
> $ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
> ondemand
> ondemand
> ondemand
> ondemand

Yes, those are the expected results for the acpi-cpufreq CPU frequency scaling driver.
You should be able to observe the governor set to sched util for the first minute
after re-boot and/or if you set it yourself after the /etc/init.d/ondemand script
has finished (i.e. more than 1 minute after re-boot.)

> ...is there a difference when using intel_pstate as scaling_driver?

Yes, but only because there are different available governors for the two drivers.

> Are the scripts of Ubuntu working properly with acpi-cpufreq (only)?

As far as I know the /etc/init.d/ondemand is working properly. It sets the acpi-cpufreq
driver to use the "ondemand" governor and it sets the intel_pstate driver to use the
"powersave" governor.

... Doug

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Re: [intel-pstate driver regression] processor frequency very high  even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 00:20 +0200
  Re: [intel-pstate driver regression] processor frequency very high  even if in idle "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> - 2016-03-31 00:30 +0200
    Re: [intel-pstate driver regression] processor frequency very high  even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 00:50 +0200
      Re: [intel-pstate driver regression] processor frequency very high  even if in idle "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2016-03-31 01:20 +0200
        Re: [intel-pstate driver regression] processor frequency very high  even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-31 01:30 +0200
          Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-03-31 01:40 +0200
            Re: [intel-pstate driver regression] processor frequency very high  even if in idle "Rafael J. Wysocki" <rafael@kernel.org> - 2016-03-31 01:50 +0200
              Re: [intel-pstate driver regression] processor frequency very high  even if in idle "Navin P.S" <navinp1912@gmail.com> - 2016-03-31 09:30 +0200
  RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-03-31 01:00 +0200
    Re: [intel-pstate driver regression] processor frequency very high  even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-03-31 01:20 +0200
    Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-03-31 10:20 +0200
      RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-03-31 16:40 +0200
        Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-04-02 08:20 +0200
          Re: [intel-pstate driver regression] processor frequency very high  even if in idle Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-04-02 17:40 +0200
            Re: [intel-pstate driver regression] processor frequency very high  even if in idle Jörg Otte <jrg.otte@gmail.com> - 2016-04-02 19:20 +0200
              Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-04-02 20:30 +0200
                RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-03 21:10 +0200
                Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-04-04 07:20 +0200
                RE: [intel-pstate driver regression] processor frequency very high even if in idle "Doug Smythies" <dsmythies@telus.net> - 2016-04-04 08:20 +0200
                Re: [intel-pstate driver regression] processor frequency very high  even if in idle Sedat Dilek <sedat.dilek@gmail.com> - 2016-04-04 16:20 +0200

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