zen-rapl

Advanced monitoring of core power and frequencies on AMD Zen processors using MSR.

This uses model-specific registers (MSRs) to read the running average power levels (RAPL) the processor. It is designed to compliment the Zenpower3 driver.

The output has been formatted to resemble those from the sensors utility so scripts that use the output from that command can parse it the same.

Example output

zen3-rapl
Package:       109.59 W
Core_0:          4.50 W
Core_1:          5.02 W
Core_2:          4.38 W
Core_3:          4.71 W
Core_4:          3.60 W
Core_5:          3.91 W
Core_6:          3.42 W
Core_7:          4.00 W
Core_8:          1.20 W
Core_9:          2.46 W
Core_10:         2.26 W
Core_11:         2.44 W
Core_12:         0.97 W
Core_13:         1.62 W
Core_14:         0.08 W
Core_15:         1.52 W
Core_0_eff:   4.600 GHz
Core_1_eff:   3.680 GHz
Core_2_eff:   3.680 GHz
Core_3_eff:   3.680 GHz
Core_4_eff:   3.680 GHz
Core_5_eff:   3.680 GHz
Core_6_eff:   3.680 GHz
Core_7_eff:   3.680 GHz
Core_8_eff:   3.680 GHz
Core_9_eff:   4.600 GHz
Core_10_eff:  3.680 GHz
Core_11_eff:  3.680 GHz
Core_12_eff:  3.680 GHz
Core_13_eff:  3.680 GHz
Core_14_eff:  3.680 GHz
Core_15_eff:  3.680 GHz

Requirements

AMD family 17h or 19h processor (Zen, Zen2, Zen3)
MSR kernel module (modprobe msr)
Access to the MSR device files at /dev/cpu/*/msr (usually requires root)

Building

make
sudo ./zen-rapl

Acknowlegements

Based upon some code from Zenmonitor 3