Linux power management
Intro For x86_64,there are some cpu setting to control the CPU power consumption and therefore CPU power dissipation. On fedora, the package kernel-tools provides tools to handle cpu power management. On debian, the package required is linux-tools-common or ( linux-cpupower ). Governor Governors are set of rules for scaling cpu frequency. See the kernel documentation for details.
You can check current governor.
Setting max and min frequencies
To tune governor, it is possible to set the freq range
Hardware details
Cpupower use kernel module to operate the magic. Its depend on the cpu manifacturer and model.
Available driver can be listed here:
Intro For x86_64,there are some cpu setting to control the CPU power consumption and therefore CPU power dissipation. On fedora, the package kernel-tools provides tools to handle cpu power management. On debian, the package required is linux-tools-common or ( linux-cpupower ). Governor Governors are set of rules for scaling cpu frequency. See the kernel documentation for details.
Cpupower example
cpupower frequency-set -g powersaveRetrieve governor
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Freq range
# set max freq cpupower frequency-set -u clock_freq # set min freq cpupower frequency-set -d clock_freq # set the freq ( freq = min = max) cpupower frequency-set -f clock_freq
Driver in use
cpupower frequency-info | grep driver
Available driver
ls /usr/lib/modules/$(uname -r)/kernel/drivers/cpufreq/