Powercap

RAPL (Intel)

• msr-safe
• x86_adapt
• PAPI
• geopm

https://onlinelibrary.wiley.com/doi/pdf/10.1002/cpe.4485

Additionally,the Linux kernel has begun to expose RAPL-based power management via the sysfs powercap interface,which provides simpler and safer access to the low-level power controls.The Linux perf command-line interface has begun exposing and managing some of the hardware counters,but the power management is still handled by accessing the sysfs powercap filesystem.

OPAL (IBM)