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).
- By default only values of core zero are displayed. How to display settings of
REMARKS
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 <[email protected]> - author Mattia Dongili<[email protected]> - first autolibtoolization