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Thomas Renningere03bd1a2011-12-16 15:35:52 +01001.TH "CPUPOWER\-FREQUENCY\-INFO" "1" "0.1" "" "cpupower Manual"
Dominik Brodowski7fe2f632011-03-30 16:30:11 +02002.SH "NAME"
3.LP
Dominik Brodowski498ca792011-08-06 18:11:43 +02004cpupower frequency\-info \- Utility to retrieve cpufreq kernel information
Dominik Brodowski7fe2f632011-03-30 16:30:11 +02005.SH "SYNTAX"
6.LP
Dominik Brodowski498ca792011-08-06 18:11:43 +02007cpupower [ \-c cpulist ] frequency\-info [\fIoptions\fP]
Dominik Brodowski7fe2f632011-03-30 16:30:11 +02008.SH "DESCRIPTION"
9.LP
10A small tool which prints out cpufreq information helpful to developers and interested users.
11.SH "OPTIONS"
12.LP
13.TP
14\fB\-e\fR \fB\-\-debug\fR
15Prints out debug information.
16.TP
17\fB\-f\fR \fB\-\-freq\fR
18Get frequency the CPU currently runs at, according to the cpufreq core.
19.TP
20\fB\-w\fR \fB\-\-hwfreq\fR
21Get frequency the CPU currently runs at, by reading it from hardware (only available to root).
22.TP
23\fB\-l\fR \fB\-\-hwlimits\fR
24Determine the minimum and maximum CPU frequency allowed.
25.TP
26\fB\-d\fR \fB\-\-driver\fR
27Determines the used cpufreq kernel driver.
28.TP
29\fB\-p\fR \fB\-\-policy\fR
30Gets the currently used cpufreq policy.
31.TP
32\fB\-g\fR \fB\-\-governors\fR
33Determines available cpufreq governors.
34.TP
35\fB\-a\fR \fB\-\-related\-cpus\fR
36Determines which CPUs run at the same hardware frequency.
37.TP
38\fB\-a\fR \fB\-\-affected\-cpus\fR
39Determines which CPUs need to have their frequency coordinated by software.
40.TP
41\fB\-s\fR \fB\-\-stats\fR
42Shows cpufreq statistics if available.
43.TP
44\fB\-y\fR \fB\-\-latency\fR
45Determines the maximum latency on CPU frequency changes.
46.TP
47\fB\-o\fR \fB\-\-proc\fR
48Prints out information like provided by the /proc/cpufreq interface in 2.4. and early 2.6. kernels.
49.TP
50\fB\-m\fR \fB\-\-human\fR
51human\-readable output for the \-f, \-w, \-s and \-y parameters.
52.TP
Dominik Brodowski7fe2f632011-03-30 16:30:11 +020053.SH "REMARKS"
54.LP
55By default only values of core zero are displayed. How to display settings of
56other cores is described in the cpupower(1) manpage in the \-\-cpu option section.
57.LP
58You can't specify more than one of the output specific options \-o \-e \-a \-g \-p \-d \-l \-w \-f \-y.
59.LP
60You also can't specify the \-o option combined with the \-c option.
61.SH "FILES"
62.nf
63\fI/sys/devices/system/cpu/cpu*/cpufreq/\fP
64\fI/proc/cpufreq\fP (deprecated)
65\fI/proc/sys/cpu/\fP (deprecated)
66.fi
67.SH "AUTHORS"
68.nf
69Dominik Brodowski <linux@brodo.de> \- author
70Mattia Dongili<malattia@gmail.com> \- first autolibtoolization
71.fi
72.SH "SEE ALSO"
73.LP
74cpupower\-frequency\-set(1), cpupower(1)