watch --interval '0.5' grep \'cpu MHz\' '/proc/cpuinfo'

• Check

sudo x86_energy_perf_policy

• Max Performance

sudo x86_energy_perf_policy --all 'performance' --turbo-enable '1' --force

• Ubuntu

• Automatic power-management like tlp
• Required to remove so it doesn't override below udev rule

sudo apt remove power-profiles-daemon

sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/ac-power.sh' && sudo chmod +x '/etc/udev/scripts.d/ac-power.sh'

#!/bin/bash

# AC
x86_energy_perf_policy --all 'performance' --turbo-enable '1' --force

# End

'/etc/udev/scripts.d/ac-power.sh'

sudo mkdir -p '/etc/udev/scripts.d' && sudo -e '/etc/udev/scripts.d/battery-power.sh' && sudo chmod +x '/etc/udev/scripts.d/battery-power.sh'

#!/bin/bash

# Battery
x86_energy_perf_policy --all 'balance-power' --turbo-enable '0' --force

# End

'/etc/udev/scripts.d/battery-power.sh'

sudo -e '/etc/udev/rules.d/99-power.rules' && sudo udevadm control --reload

# AC
ACTION=="add|change", SUBSYSTEM=="power_supply", ATTRS{type}=="Mains", ATTRS{online}=="1", RUN+="/etc/udev/scripts.d/ac-power.sh"

# Battery
ACTION=="add|change", SUBSYSTEM=="power_supply", ATTRS{type}=="Mains", ATTRS{online}=="0", RUN+="/etc/udev/scripts.d/battery-power.sh"

# End

• Should report something like Write to unrecognized MSR 0x770 by x86_energy_perf early boot and on AC hot-plug

sudo dmesg | grep 'MSR'

watch --interval '0.5' grep \'cpu MHz\' '/proc/cpuinfo'