Computing weights for a different system

[AdithyaRaman]

Hi I am trying to run powerletrics on SteamOS on a SteamDeck.

I noticed in the config file that the weights provided might provide accurate energy calculation for the macos

# https://github.com/green-kernel/documentation/blob/main/macos_powermetrics.md
# These are the current default values from powermetrics
[Weights]
CPU_WEIGHT = 1
WAKEUP_WEIGHT = 0.00020
DISK_WRITE_WEIGHT = 0.00000000045
DISK_READ_WEIGHT = 0.00000000045
NETWORK_WRITE_WEIGHT = 0.0000040
NETWORK_READ_WEIGHT = 0.0000040
MEMORY_WEIGHT = 0

[eBPF]
COMM_LENGTH=4096

Is there any way that we can compute these weights for an arbitrary device and load those weights before we run the powerletrics tool?

[ribalba]

Hey, thank you for trying PowerLetrics. This is something we are actively working on. The idea is to run a stress test initially to find these values with an external power meter attached. We still haven't had time though to implement this.

If you want I can share my thoughts in more detail.

Is everything else working?

[AdithyaRaman]

Would love to hear more about it. I have built my own C++ script to track power usage of different hardware available on a system but it does not provide per-process metrics.

Everything else seems to be working fine. I am trying to trying to repurpose it to track the energy consumption of only a single process and dump it into a csv file. I don't think those capabilities currently exist.

Also I am curious, When the tool says "EnergyFootprint", are we looking at energy in Joules/Millijoules or is it some other unit?

[ribalba]

Hey,

filtering by PID is something I have on the todo too. You can already do that with grep. But obviously if the program would allow it the overhead would be less.

EnergyFootprint is very much like energy impact on Mac. See the discussion here:

• https://github.com/green-kernel/documentation/blob/main/macos_powermetrics.md
• https://github.com/green-kernel/powerletrics?tab=readme-ov-file#what-is-energy-footprint

We don't show the energy in mJ as this is pretty much impossible to get right. You can also see my Fosdem talk here:

https://www.youtube.com/watch?v=hzuz3zNtet8