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RAPL Energy

Reading CPU energy consumption and controlling CPU power limits through RAPL.

Reading RAPL requires elevated permissions.

RAPL permissions

Create a new rapl group.

sudo groupadd rapl
sudo usermod -aG rapl $USER

Create a new file sudo nano /etc/udev/rules.d/70-intel-rapl.rules and add the following rule.

ACTION=="add", SUBSYSTEM=="powercap", KERNEL=="intel-rapl:*", \
  RUN+="/usr/bin/chgrp rapl /sys/%p/energy_uj", \
  RUN+="/usr/bin/chmod g+r /sys/%p/energy_uj"

Reboot, and check if you can read cat /sys/class/powercap/intel-rapl:*/energy_uj

rapl-energy 0.2.0

RAPL Energy

RAPL permissions