In Linux you want powercap tools. You can tune all three parameters in terms of power and time constant, so you can do exactly what you suggest. You can change it on the fly without rebooting so you could have a ridiculous setup like mine where I have the power limits wired up to two unused buttons on my mouse.
Seems to work pretty well. I was initially confused — it seems the default on my system had the “long term” limit set to some very high value, which made my changes to the short term moot. Seems like an odd default but I’ll blame ASUS for that I guess.
Still slightly confused as to what exactly the “time window” means physically. With mine set to 1000us I still seem to get multiple seconds at full power. But it bumps down before the fan spins up so that seems good enough!
Looking forward to the inevitable realization tomorrow that this is going to make my computer unusable in zoom calls.
