Disabling CPU throttling on fedora22

[jd1008]

On 11/27/2015 01:05 PM, Alex wrote:
> Hi,
> I have a fedora22 SuperMicro system operating as a mail server that
> has no need to have the CPU throttled. I'm having trouble figuring out
> how to disable the throttling. There also doesn't appear to be any
> recent threads discussing this previously.
>
> It appears some are running at full speed while others are not:
>
> # cat /proc/cpuinfo |grep Hz
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 1875.187
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 2188.687
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 2399.906
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 1475.812
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 2075.437
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 2340.750
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 1262.062
> model name      : Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
> cpu MHz         : 2111.812
>
> I've searched for the programs I've used in the past, including
> cpuspeed and cpufreq-* but they appear to no longer exist.
>
> I've looked in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
> and all are set to "performance".
>
> What is the procedure for disabling CPU throttling permanently?
>
> Thanks,
> Alex
I thought it is related to PM (power management) deamon.
Is there a kernel thread running called: acpi_thermal_pm ?
Run ps to see.

Since it is a kernel thread, I assume it is not under user control.