tools/power/cpupower/man/cpupower-frequency-info.1

Source file repositories/reference/linux-study-clean/tools/power/cpupower/man/cpupower-frequency-info.1

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System
Linux kernel
Corpus path
tools/power/cpupower/man/cpupower-frequency-info.1
Extension
.1
Size
2690 bytes
Lines
87
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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Annotated Snippet

.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\-b\fR \fB\-\-boost\fR
Gets the current boost state support.
.TP
\fB\-z\fR \fB\-\-epp\fR
Gets the current EPP (energy performance preference).
.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\-\-performance\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.

Annotation

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