Provided by: powercap-utils_0.6.0-1_amd64
NAME
rapl-info - get RAPL configurations
SYNPOSIS
rapl-info [OPTION]...
DESCRIPTION
This utility is deprecated, use powercap-info(1) instead. Prints out Intel Running Average Power Limit (RAPL) configurations. Note that the -p and -z options are different from powercap-info(1). This software requires an Intel processor (Sandy Bridge or newer), Linux kernel 3.13 or newer compiled with CONFIG_POWERCAP and CONFIG_INTEL_RAPL enabled, and the intel_rapl kernel module to be loaded.
OPTIONS
-h, --help Prints out the help screen -v, --verbose Print errors when files are not available -p, --zone=ZONE The zone number (none by default; 0 by default if using -z/--subzone and/or -c/--constraint). Ending with a colon prevents output for subzones. E.g., for zone 0, but not subzones: -p 0: -p, --package=PACKAGE Deprecated, use --zone instead -z, --subzone=SUBZONE The subzone number (none by default) -c, --constraint=CONSTRAINT The constraint number (none by default) All remaining options below are mutually exclusive: -n, --nzones Print the number of zones found, or the number of subzones found if -p/--zone is set The following are zone-level arguments (-z/--subzone is optional): -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 -c/--constraint (-z/--subzone is optional): -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
EXAMPLES
Note that -p/--zone=0 is used by default when also specifying -z/--subzone and/or -c/--constraint, allowing for simpler commands on single-socket systems. rapl-info Print all RAPL zones. rapl-info -p 0 Print only zone 0, which is usually named package-0. rapl-info -p 0 -z 1 Print zone 0, subzone 1, which is usually the uncore or dram subzone of package-0, depending on the system. rapl-info -p 0 -c 1 Print zone 0, constraint 1, which is usually the short_term constraint for package-0. rapl-info -p 0 -j Print the energy counter for zone 0, which is usually named package-0. rapl-info -p 1 -z 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).
REMARKS
Some fields are optional and will only be printed if they are available unless -v/--verbose is set. If no zone/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)
BUGS
The following are behavioral quirks due to the kernel interface or abnormalities in some hardware. They are not bugs in rapl-info and should not be reported as such. Values returned by the kernel sometimes lose accuracy from the actual values stored in Model-Specific Registers due to integer rounding. For example, the kernel may return a time window value of 7812 us, when in fact the actual stored value is 7812.5 us. Writing back a value returned by the kernel, e.g., using rapl-set(1), may cause unexpected changes to its value due to these rounding problems. At the time of this writing, some features in the powercap interface are not supported by RAPL. The following options may result in ENOENT (No such file or directory) errors: -w/--z-power -W/--z-max-power-range -u/--c-min-power -T/--c-max-time-window -t/--c-min-time-window On some systems, the constraint max_power_uw file, e.g., constraint_0_max_power_uw, is known to receive an ENODATA (No data available) error from the kernel for subzones. So even though the file exists, a value may not be printed for it. It is possible for packages on multi-socket systems to be indexed out of order by the kernel. For example, the package at index 0 (-p 0) could actually be named package-1 while the package at index 1 (-p 1) is named package-0. Report bugs upstream at <https://github.com/powercap/powercap>
FILES
/sys/devices/virtual/powercap/intel-rapl/* /sys/class/powercap/intel-rapl/*
AUTHORS
Connor Imes <connor.k.imes@gmail.com>
SEE ALSO
powercap-info(1), powercap-set(1), rapl-set(1)