Power model

A power model determines the power draw of a CPU or GPU from its utilization. Every host has one for its CPU (cpuPowerModel) and one for its GPU (gpuPowerModel). When none is given, a linear model with an idle power of 200 W and a maximum power of 400 W is used.

Field	Type	Default	Description
modelType	string	required	The model, see the table below.
idlePower	Power	required	The power draw at 0% utilization.
maxPower	Power	required	The power draw at 100% utilization. It must be at least idlePower.
power	Power	400 W	The power draw of the constant model.
calibrationFactor	number	1.0	The calibration factor of the mse model.
asymUtil	number	0.0	The utilization above which the asymptotic model grows close to linearly.
dvfs	boolean	true	Whether the asymptotic model models dynamic voltage and frequency scaling.

Model type	Power draw
constant	Always power, independent of the utilization.
linear	Grows linearly from idlePower at 0% utilization to maxPower at 100%.
square	Grows with the square of the utilization.
cubic	Grows with the cube of the utilization.
sqrt	Grows with the square root of the utilization.
mse	Fitted to measurements, after Fan et al., ISCA 2007.
asymptotic	Grows close to linearly above the utilization asymUtil, adapted from GreenCloud.

Example

"cpuPowerModel": {
    "modelType": "sqrt",
    "idlePower": "32 W",
    "maxPower": "180 W"
}