Re: [cpufreq-4.7] New schedutil governor in combination with intel_pstate/x86

["Rafael J. Wysocki" <rafael@kernel.org>]

On Thu, May 19, 2016 at 4:24 PM, Sedat Dilek <sedat.dilek@gmail.com> wrote:
> On 5/19/16, Rafael J. Wysocki <rafael@kernel.org> wrote:
>> On Thu, May 19, 2016 at 3:54 PM, Sedat Dilek <sedat.dilek@gmail.com> wrote:
>>> On 5/19/16, Rafael J. Wysocki <rafael@kernel.org> wrote:
>>>> On Thu, May 19, 2016 at 3:41 PM, Sedat Dilek <sedat.dilek@gmail.com>
>>>> wrote:
>>>>> On 5/19/16, Rafael J. Wysocki <rafael@kernel.org> wrote:
>>>>>> On Thu, May 19, 2016 at 2:10 PM, Sedat Dilek <sedat.dilek@gmail.com>
>>>>>> wrote:
>>>>>>> On 5/19/16, Rafael J. Wysocki <rafael@kernel.org> wrote:
>>>>>>>> On Thu, May 19, 2016 at 1:04 PM, Sedat Dilek <sedat.dilek@gmail.com>
>>>>>>>> wrote:
>>>>
>>>> [cut]
>>>>
>>>>>
>>>>> With these changes...
>>>>>
>>>>> $ ./scripts/diffconfig /boot/config-4.6.0-4-iniza-small
>>>>> /boot/config-4.6.0-5-iniza-small
>>>>>  CPU_FREQ_STAT y -> m
>>>>>  X86_ACPI_CPUFREQ y -> m
>>>>>  X86_POWERNOW_K8 y -> m
>>>>>
>>>>> ...I still see "Fast frequency switching not enabled"...
>>>>>
>>>>> $ sudo modprobe -r -v acpi_cpufreq
>>>>> [sudo] password for wearefam:
>>>>> rmmod acpi_cpufreq
>>>>> $ sudo modprobe -r -v cpufreq_stats
>>>>> rmmod cpufreq_stats
>>>>>
>>>>> $ sudo modprobe -v cpufreq_stats
>>>>> insmod
>>>>> /lib/modules/4.6.0-5-iniza-small/kernel/drivers/cpufreq/cpufreq_stats.ko
>>>>
>>>> Skip the above modprobe. :-)
>>>>
>>>
>>> If I do not insmod cpufreq_stats (only insmod acpi_cpufreq) then I do
>>> not see anything with "cpu fast switching" in my logs.
>>> ( I double-checked to have schedutil as running cpufreq-governor. )
>>
>> That means it has been enabled.
>>
>
> How can I check if cpu fast switching is really enabled?
> I checked with the dmesg before.

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