Scroll to navigation

POWERCAP-SET(1) powercap-set POWERCAP-SET(1)

NAME

powercap-set - manage power capping devices with the Linux power capping framework

SYNPOSIS

powercap-set NAME [OPTION]...

DESCRIPTION

Sets configurations for a powercap control type.

The control type NAME must not be empty or contain a '.' or '/'.

OPTIONS

Prints the help screen
Deprecated, provide NAME as the first positional argument instead.
The zone/subzone numbers in the control type's powercap tree. Separate zones/subzones with a colon. E.g., for zone 0, subzone 2:
-z 0:2
The constraint number (none by default)
Enable/disable a control type

The following zone-level arguments may be used together and require -z/--zone:

Reset zone energy counter
Enable/disable a zone

The following constraint-level arguments may be used together and require -z/--zone and -c/--constraint:

Set constraint power limit
Set constraint time window

EXAMPLES

Enable zone 0 for the intel-rapl control type.
Enable zone 0, subzone 1 for the intel-rapl control type.
Set a power cap of 25 Watts (25000000 uW) on zone 0, constraint 1 for the intel-rapl control type.
Set a power cap of 15 Watts (15000000 uW) and time window of 976 microseconds on zone 1, subzone 0, constraint 0 for the intel-rapl control type.

REMARKS

Administrative (root) privileges are usually needed to use powercap-set.

Setting constraint power cap and/or time limit values may not enable or disable a zone/subzone - set the -e/--z-enabled flag explicitly.

The kernel may round power limits and time windows to discrete values supported by the hardware, e.g., 28 seconds might round to 27983872 microseconds.

Power units: microwatts (uW)
Time units: microseconds (us)

BUGS

Report bugs upstream at <https://github.com/powercap/powercap>

FILES

/sys/devices/virtual/powercap/*


/sys/class/powercap/*

AUTHORS

Connor Imes <connor.k.imes@gmail.com>

SEE ALSO

powercap-info(1)

2021-12-12 powercap