Show CPU efficiency

[gnusenpai]

CPU analog of #1622.

Adds a HUD element that displays CPU efficiency in frames per joule (F/J).

I would be interested in adding a CPU power limit indicator like in #1623, but AFAIK, CPUs don't seem to report that without poking at the MSRs and such.

[gnusenpai]

Maybe flip_efficiency should be moved since it now applies to both CPU and GPU?

MangoHud/README.md

Lines 409 to 411 in f8a36e9

	| `gpu_efficiency` | Display GPU efficiency in frames per joule |
	| `flip_efficiency` | Flips GPU efficiency to joules per frame |
	| `hide_fsr_sharpness` | Hides the sharpness info for the `fsr` option (only available in gamescope) |

MangoHud/data/MangoHud.conf

Lines 96 to 98 in f8a36e9

	# gpu_efficiency
	# flip_efficiency

[flightlessmango]

Maybe flip_efficiency should be moved since it now applies to both CPU and GPU?

Moved where/how? But probably yes?

[gnusenpai]

Moved where/how? But probably yes?

I was sorta asking what your preference would be for an option like that. It's not obvious to me where it should go other than just stick it at the bottom lol.

[flightlessmango]

I see what you mean. Can't really think of a good place to put it

[flightlessmango]

This might be interesting to have for devices like steam deck where you calculate based on the battery wattage

[gnusenpai]

Something like system_efficiency?

[flightlessmango]

Yeah I think that sounds good

[gnusenpai]

I've moved flip_efficiency to where I think it makes sense. It appears the variables in the README were sorted alphabetically at some point, but it no longer is so I just put it at the bottom.

Do you have a development workflow for testing on the Steam Deck? I made it happen when making the power limit PR, but it was a complete mess. Kinda need that sorted to work on system_efficiency.

[flightlessmango]

Do you have a development workflow for testing on the Steam Deck?

No not really

[axet]

Because we have GPU measured in WATT would be nice to convert JOULES to WATTs. W=J/s