7fe2f6399a
CPU power consumption vs performance tuning is no longer limited to CPU frequency switching anymore: deep sleep states, traditional dynamic frequency scaling and hidden turbo/boost frequencies are tied close together and depend on each other. The first two exist on different architectures like PPC, Itanium and ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will only run most efficiently if CPU and GPU has proper power management in place. Users and Developers want to have *one* tool to get an overview what their system supports and to monitor and debug CPU power management in detail. The tool should compile and work on as many architectures as possible. Once this tool stabilizes a bit, it is intended to replace the Intel-specific tools in tools/power/x86 Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
55 lines
1.7 KiB
Groff
55 lines
1.7 KiB
Groff
.TH "cpufreq-set" "1" "0.1" "Mattia Dongili" ""
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.SH "NAME"
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.LP
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cpufreq\-set \- A small tool which allows to modify cpufreq settings.
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.SH "SYNTAX"
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.LP
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cpufreq\-set [\fIoptions\fP]
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.SH "DESCRIPTION"
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.LP
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cpufreq\-set allows you to modify cpufreq settings without having to type e.g. "/sys/devices/system/cpu/cpu0/cpufreq/scaling_set_speed" all the time.
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.SH "OPTIONS"
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.LP
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.TP
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\fB\-d\fR \fB\-\-min\fR <FREQ>
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new minimum CPU frequency the governor may select.
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.TP
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\fB\-u\fR \fB\-\-max\fR <FREQ>
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new maximum CPU frequency the governor may select.
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.TP
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\fB\-g\fR \fB\-\-governor\fR <GOV>
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new cpufreq governor.
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.TP
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\fB\-f\fR \fB\-\-freq\fR <FREQ>
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specific frequency to be set. Requires userspace governor to be available and loaded.
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.TP
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\fB\-r\fR \fB\-\-related\fR
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modify all hardware-related CPUs at the same time
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.TP
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\fB\-h\fR \fB\-\-help\fR
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Prints out the help screen.
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.SH "REMARKS"
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.LP
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By default values are applied on all cores. How to modify single core
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configurations is described in the cpupower(1) manpage in the \-\-cpu option section.
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.LP
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The \-f FREQ, \-\-freq FREQ parameter cannot be combined with any other parameter.
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.LP
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FREQuencies can be passed in Hz, kHz (default), MHz, GHz, or THz by postfixing the value with the wanted unit name, without any space (frequency in kHz =^ Hz * 0.001 =^ MHz * 1000 =^ GHz * 1000000).
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.LP
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On Linux kernels up to 2.6.29, the \-r or \-\-related parameter is ignored.
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.SH "FILES"
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.nf
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\fI/sys/devices/system/cpu/cpu*/cpufreq/\fP
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\fI/proc/cpufreq\fP (deprecated)
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\fI/proc/sys/cpu/\fP (deprecated)
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.fi
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.SH "AUTHORS"
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.nf
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Dominik Brodowski <linux@brodo.de> \- author
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Mattia Dongili<malattia@gmail.com> \- first autolibtoolization
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.fi
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.SH "SEE ALSO"
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.LP
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cpupower\-frequency\-info(1), cpupower(1)
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