cpufreq-info (1) Linux Manual Page
cpufreq-info – Utility to retrieve cpufreq kernel information
Syntax
cpufreq-info [options]Description
A small tool which prints out cpufreq information helpful to developers and interested users.Options
- -c –cpu <CPU>
-
<CPU> number which information shall be determined about.
- -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.
- -h –help
- Prints out the help screen.
- -e –debug
Remarks
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 [at] brodo.de> – author
Mattia Dongili<malattia [at] gmail.com> – first autolibtoolization