powercap-info - get information from the Linux power capping
framework
powercap-info -p NAME [OPTION]...
Prints configurations for a powercap control type.
- -h, --help
- Prints the help screen
- -v,
--verbose
- Print errors when files are not available
- -p,
--control-type=NAME
- [REQUIRED] The powercap control type name. Must not be empty or contain a
'.' or '/'.
- -z,
--zone=ZONE(S)
- The zone/subzone numbers in the control type's powercap tree (control
type's root by default). Separate zones/subzones with a colon. E.g., for
zone 0, subzone 2:
-z 0:2
Ending with a colon prevents output for subzones. E.g., for zone 0, but not
subzones:
-z 0:
- -c,
--constraint=CONSTRAINT
- The constraint number
- All remaining options below are
mutually exclusive:
- -n,
--nzones
- Print the number of zones (control type's root by default; within the
-z/--zone level, if set)
The following are zone-level arguments and require -z/--zone:
- -j,
--z-energy
- Print zone energy counter
- -J,
--z-max-energy-range
- Print zone maximum energy counter range
- -w,
--z-power
- Print zone current power
- -W,
--z-max-power-range
- Print zone maximum current power range
- -e,
--z-enabled
- Print zone enable/disabled status
- -x,
--z-name
- Print zone name
The following are constraint-level arguments and require -z/--zone
and -c/--constraint:
- -l,
--c-power-limit
- Print constraint power limit
- -s,
--c-time-window
- Print constraint time window
- -U,
--c-max-power
- Print constraint maximum allowed power
- -u,
--c-min-power
- Print constraint minimum allowed power
- -T,
--c-max-time-window
- Print constraint maximum allowed time window
- -t,
--c-min-time-window
- Print constraint minimum allowed time window
- -y,
--c-name
- Print constraint name
These examples use Intel RAPL, for which the control type is
intel-rapl.
- powercap-info -p
intel-rapl
- Print all RAPL zones.
- powercap-info
-p intel-rapl -z 0
- Print only zone 0, which is usually named package-0.
- powercap-info
-p intel-rapl -z 0:1
- Print zone 0, subzone 1, which is usually the uncore or dram
subzone of package-0, depending on the system.
- powercap-info
-p intel-rapl -z 0 -c 1
- Print zone 0, constraint 1, which is usually the short_term
constraint for package-0.
- powercap-info
-p intel-rapl -z 0 -j
- Print the energy counter for zone 0, which is usually named
package-0.
- powercap-info
-p intel-rapl -z 1:0 -c 0 -l
- Print the power limit for zone 1, subzone 0, constraint 0, which is
usually the long_term constraint for the core subzone of
package-1 (a multi-socket system).
Some fields are optional and will only be printed if they are
available unless -v/--verbose is set.
If no subzone/constraint-specific outputs are requested, all available zones
and constraints will be shown.
Energy units: microjoules (uJ)
Power units: microwatts (uW)
Time units: microseconds (us)
Report bugs upstream at
<https://github.com/powercap/powercap>
/sys/devices/virtual/powercap/*
/sys/class/powercap/*
Connor Imes <connor.k.imes@gmail.com>