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cpupower

cpupower is a powerful Linux command-line suite designed to inspect and tune CPU power-saving features, such as frequency scaling (cpufreq) and idle states (cpuidle)

First fo all we must be sure that we are allowed to use cpupower and following setting should be set to

$ zgrep CPU_FREQ /proc/config.gz
CONFIG_ACPI_CPU_FREQ_PSS=y
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

Dump frequency info of cpu

cpupower frequency-info

Get idle info of cpu

cpupower idle-info

Get cpupower powercap info

cpupower powercap-info

Get cpupower info (require root)

cpupower info

Monitor cpu info

cpupower monitor

Set cpupower frequency-set to performance

cpupower frequency-set -g performance

Set cpu perfomance for scaling governor without cpupower

echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

Dump current setting for scaling_governor

cpupower frequency-info | grep "The governor"

Dump current setting for scaling_governor without cpupower

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

Set current scaling_governor permanent

  • Enable cpupower by rc-update at boot"
rc-update add cpupower default

Set perfomance to be default by edit configuration file

vim /etc/conf.d/cpupower