CPUPOWER-FREQUENCY-INFO(1)

NAME

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

SYNTAX

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

DESCRIPTION

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

OPTIONS

-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.

-b --boost
    Gets the current boost state support.

-z --epp
    Gets the current EPP (energy performance preference).

-r --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.

-c --performance
    Get performances and frequencies capabilities of CPPC, by reading it from hardware (only available on the hardware with CPPC).

REMARKS

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.

FILES
/sys/devices/system/cpu/cpu*/cpufreq/
/proc/cpufreq (deprecated)
/proc/sys/cpu/ (deprecated)

AUTHORS
Dominik Brodowski <linux@brodo.de> - author
Mattia Dongili<malattia@gmail.com> - first autolibtoolization

SEE ALSO

cpupower-frequency-set(1), cpupower(1)