# 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](https://github.com/koweda/zenpower3).

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
1. `make`
2. `sudo ./zen-rapl`

## Acknowlegements
Based upon some code from [Zenmonitor 3](https://github.com/jpr999/zenmonitor3)