| .TH "CPUPOWER\-FREQUENCY\-INFO" "1" "0.1" "" "cpupower Manual" |
| .SH "NAME" |
| .LP |
| cpupower\-frequency\-info \- Utility to retrieve cpufreq kernel information |
| .SH "SYNTAX" |
| .LP |
| cpupower [ \-c cpulist ] frequency\-info [\fIoptions\fP] |
| .SH "DESCRIPTION" |
| .LP |
| A small tool which prints out cpufreq information helpful to developers and interested users. |
| .SH "OPTIONS" |
| .LP |
| .TP |
| \fB\-e\fR \fB\-\-debug\fR |
| Prints out debug information. |
| .TP |
| \fB\-f\fR \fB\-\-freq\fR |
| Get frequency the CPU currently runs at, according to the cpufreq core. |
| .TP |
| \fB\-w\fR \fB\-\-hwfreq\fR |
| Get frequency the CPU currently runs at, by reading it from hardware (only available to root). |
| .TP |
| \fB\-l\fR \fB\-\-hwlimits\fR |
| Determine the minimum and maximum CPU frequency allowed. |
| .TP |
| \fB\-d\fR \fB\-\-driver\fR |
| Determines the used cpufreq kernel driver. |
| .TP |
| \fB\-p\fR \fB\-\-policy\fR |
| Gets the currently used cpufreq policy. |
| .TP |
| \fB\-g\fR \fB\-\-governors\fR |
| Determines available cpufreq governors. |
| .TP |
| \fB\-r\fR \fB\-\-related\-cpus\fR |
| Determines which CPUs run at the same hardware frequency. |
| .TP |
| \fB\-a\fR \fB\-\-affected\-cpus\fR |
| Determines which CPUs need to have their frequency coordinated by software. |
| .TP |
| \fB\-s\fR \fB\-\-stats\fR |
| Shows cpufreq statistics if available. |
| .TP |
| \fB\-y\fR \fB\-\-latency\fR |
| Determines the maximum latency on CPU frequency changes. |
| .TP |
| \fB\-o\fR \fB\-\-proc\fR |
| Prints out information like provided by the /proc/cpufreq interface in 2.4. and early 2.6. kernels. |
| .TP |
| \fB\-m\fR \fB\-\-human\fR |
| human\-readable output for the \-f, \-w, \-s and \-y parameters. |
| .TP |
| \fB\-n\fR \fB\-\-no-rounding\fR |
| Output frequencies and latencies without rounding off values. |
| .TP |
| \fB\-c\fR \fB\-\-perf\fR |
| Get performances and frequencies capabilities of CPPC, by reading it from hardware (only available on the hardware with CPPC). |
| .TP |
| .SH "REMARKS" |
| .LP |
| 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. |
| .LP |
| You can't specify more than one of the output specific options \-o \-e \-a \-g \-p \-d \-l \-w \-f \-y. |
| .LP |
| You also can't specify the \-o option combined with the \-c option. |
| .SH "FILES" |
| .nf |
| \fI/sys/devices/system/cpu/cpu*/cpufreq/\fP |
| \fI/proc/cpufreq\fP (deprecated) |
| \fI/proc/sys/cpu/\fP (deprecated) |
| .fi |
| .SH "AUTHORS" |
| .nf |
| Dominik Brodowski <linux@brodo.de> \- author |
| Mattia Dongili<malattia@gmail.com> \- first autolibtoolization |
| .fi |
| .SH "SEE ALSO" |
| .LP |
| cpupower\-frequency\-set(1), cpupower(1) |
