cpupower-frequency-info (1) - Linux Manuals

cpupower-frequency-info: Utility to retrieve cpufreq kernel information


cpupower frequency-info - Utility to retrieve cpufreq kernel information


cpupower [ -c cpulist ] frequency-info [options]


A small tool which prints out cpufreq information helpful to developers and interested users.


-e --debug
Prints out debug information.
-f --freq
Get frequency the CPU currently runs at, according to the cpufreq core.
-w --hwfreq
Get frequency the CPU currently runs at, by reading it from hardware (only available to root).
-l --hwlimits
Determine the minimum and maximum CPU frequency allowed.
-d --driver
Determines the used cpufreq kernel driver.
-p --policy
Gets the currently used cpufreq policy.
-g --governors
Determines available cpufreq governors.
-a --related-cpus
Determines which CPUs run at the same hardware frequency.
-a --affected-cpus
Determines which CPUs need to have their frequency coordinated by software.
-s --stats
Shows cpufreq statistics if available.
-y --latency
Determines the maximum latency on CPU frequency changes.
-o --proc
Prints out information like provided by the /proc/cpufreq interface in 2.4. and early 2.6. kernels.
-m --human
human-readable output for the -f, -w, -s and -y parameters.
-n --no-rounding
Output frequencies and latencies without rounding off values.


By default only values of core zero are displayed. How to display settings of other cores is described in the cpupower(1) manpage in the --cpu option section.

You can't specify more than one of the output specific options -o -e -a -g -p -d -l -w -f -y.

You also can't specify the -o option combined with the -c option.


/proc/cpufreq (deprecated) 
/proc/sys/cpu/ (deprecated)


Dominik Brodowski <linux [at] brodo.de> - author 
Mattia Dongili<malattia [at] gmail.com> - first autolibtoolization