Re: [PATCH] cpupower: Add support for setting EPP via systemd service

[Jan Kiszka]

On 20.02.26 17:19, Shuah wrote:
> On 2/14/26 04:12, Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>>
>> Extend the systemd service so that it can be used for tuning the Energy
>> Performance Preference (EPP) as well.
> 
> How would users use this support? Add a few lines to help them.
> 

Just like the rest of this service: Install it, tune the conf file
according to local preferences. I just followed the preexisting patterns.

What would you like to see on top? And where? Copy what is inline
documented below into the commit message?

Jan

>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>> ---
>>   tools/power/cpupower/cpupower-service.conf | 5 +++++
>>   tools/power/cpupower/cpupower.sh           | 6 ++++++
>>   2 files changed, 11 insertions(+)
>>
>> diff --git a/tools/power/cpupower/cpupower-service.conf b/tools/power/
>> cpupower/cpupower-service.conf
>> index 02eabe8e3614..abbb46967565 100644
>> --- a/tools/power/cpupower/cpupower-service.conf
>> +++ b/tools/power/cpupower/cpupower-service.conf
>> @@ -30,3 +30,8 @@
>>   # its policy for the relative importance of performance versus
>> energy savings to
>>   # the processor. See man CPUPOWER-SET(1) for additional details
>>   #PERF_BIAS=
>> +
>> +# Set the Energy Performance Preference
>> +# Available options can be read from
>> +# /sys/devices/system/cpu/cpufreq/policy0/
>> energy_performance_available_preferences
>> +#EPP=
>> diff --git a/tools/power/cpupower/cpupower.sh b/tools/power/cpupower/
>> cpupower.sh
>> index a37dd4cfdb2b..6283e8bf275d 100644
>> --- a/tools/power/cpupower/cpupower.sh
>> +++ b/tools/power/cpupower/cpupower.sh
>> @@ -23,4 +23,10 @@ then
>>       cpupower set -b "$PERF_BIAS" > /dev/null || ESTATUS=1
>>   fi
>>   +# apply Energy Performance Preference
>> +if test -n "$EPP"
>> +then
>> +    cpupower set -e "$EPP" > /dev/null || ESTATUS=1
>> +fi
>> +
>>   exit $ESTATUS
> 
> thanks,
> -- Shuah

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