cpufreq-info
TLDR
Show CPU frequency info for all CPUs
$ cpufreq-info
Show info for specific CPU$ cpufreq-info -c 0
Show hardware limits (min/max frequency)$ cpufreq-info -l
Show current policy in table format$ cpufreq-info -o
Show available governors$ cpufreq-info -g
Show current frequency (human-readable)$ cpufreq-info -f -m
Show frequency from hardware (root only)$ sudo cpufreq-info -w -m
Show driver in use$ cpufreq-info -d
SYNOPSIS
cpufreq-info [options]
DESCRIPTION
cpufreq-info is a utility that prints CPU frequency scaling information from the kernel. It shows current frequencies, available governors, hardware limits, and other cpufreq-related data.
PARAMETERS
-c, --cpu CPU
Target a specific processor number-f, --freq
Display current CPU frequency as reported by kernel-w, --hwfreq
Read current frequency directly from hardware (root only)-l, --hwlimits
Show minimum and maximum hardware frequency limits-d, --driver
Show the active cpufreq kernel driver-p, --policy
Display the current frequency scaling policy-g, --governors
List available frequency governors-a, --related-cpus
Show CPUs sharing the same hardware frequency-s, --stats
Display frequency scaling statistics-y, --latency
Show maximum latency for frequency transitions-o, --proc
Display settings in /proc/cpufreq format-m, --human
Format output in human-readable form (for -f, -w, -s, -y)
CAVEATS
Multiple output-specific options cannot be combined in a single invocation. The -w option requires root privileges to read frequency directly from hardware. The -o option is incompatible with -c.
HISTORY
cpufreq-info is part of the cpufrequtils package, providing user-space utilities for Linux CPU frequency scaling.
SEE ALSO
cpufreq-set(1), cpupower(1), auto-cpufreq(1)
