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>
73 lines
1.5 KiB
Groff
73 lines
1.5 KiB
Groff
.TH CPUPOWER "1" "07/03/2011" "" "cpupower Manual"
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.SH NAME
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cpupower \- Shows and sets processor power related values
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.SH SYNOPSIS
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.ft B
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.B cpupower [ \-c cpulist ] subcommand [ARGS]
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.B cpupower \-v|\-\-version
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.B cpupower \-h|\-\-help
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.SH DESCRIPTION
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\fBcpupower \fP is a collection of tools to examine and tune power saving
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related features of your processor.
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The manpages of the subcommands (cpupower\-<subcommand>(1)) provide detailed
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descriptions of supported features. Run \fBcpupower help\fP to get an overview
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of supported subcommands.
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.SH Options
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.PP
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\-\-help, \-h
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.RS 4
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Shows supported subcommands and general usage.
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.RE
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.PP
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\-\-cpu cpulist, \-c cpulist
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.RS 4
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Only show or set values for specific cores.
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This option is not supported by all subcommands, details can be found in the
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manpages of the subcommands.
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Some subcommands access all cores (typically the *\-set commands), some only
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the first core (typically the *\-info commands) by default.
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The syntax for <cpulist> is based on how the kernel exports CPU bitmasks via
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sysfs files. Some examples:
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.RS 4
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.TP 16
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Input
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Equivalent to
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.TP
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all
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all cores
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.TP
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0\-3
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0,1,2,3
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.TP
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0\-7:2
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0,2,4,6
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.TP
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1,3,5-7
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1,3,5,6,7
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.TP
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0\-3:2,8\-15:4
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0,2,8,12
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.RE
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.RE
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.PP
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\-\-version, \-v
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.RS 4
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Print the package name and version number.
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.SH "SEE ALSO"
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cpupower-set(1), cpupower-info(1), cpupower-idle(1),
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cpupower-frequency-set(1), cpupower-frequency-info(1), cpupower-monitor(1),
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powertop(1)
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.PP
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.SH AUTHORS
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.nf
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\-\-perf\-bias parts written by Len Brown <len.brown@intel.com>
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Thomas Renninger <trenn@suse.de>
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