Kepler Power Estimation Deployment
In Kepler, we also provide a power estimation solution from the resource usages in the system that there is no power measuring tool installed or supported. There are two alternatives of estimators.
Estimators

Local Linear Regression Estimator: This estimator estimates power using the trained weights multiplied by normalized value of usage metrics (Linear Regression Model).

General Estimator Sidecar: This estimator transforms the usage metrics and applies with the trained models which can be any regression models from scikitlearn library or any neuron networks from Keras (TensorFlow). To use this estimator, the Kepler estimator needs to be enabled.
On top of that, the trained models as well as weights can be updated periodically with online training routine by connecting the Kepler model server API.
Deployment Scenarios
Minimum Deployment
The minimum deployment is to use local linear regression estimator in Kepler main container with only offlinetrained model weights.
Deployment with General Estimator Sidecar
To enable general estimator for power inference, the estimator sidecar can be deployed as shown in the following figure. The connection between two containers is a unix domain socket which is lightweight and fast. Unlike the local estimator, the general estimator sidecar is instrumented with several inferencesupportive libraries and dependencies. This additional overhead must be tradeoff to an increasing estimation accuracy expected from flexible choices of models.
Minimum deployment connecting to Kepler Model Server
To get the updated weights which is expected to provide better estimation accuracy, Kepler may connect to remote Kepler Model Server that performs online training using data from the system with the power measuring tool as below.
Full deployment
The following figure shows the deployment that Kepler General Estimator is enabled and it is also connecting to remote Kepler Model Server. The Kepler General Estimator sidecar can update the model from the Kepler Model Server on the fly and expect the most accurate model.
Provided power models on Kepler Model DB
version  power data source  pipeline  available energy sources  error report 

0.6  nx12  std_v0.6  rapl,acpi  Link 
0.7  SPECpower  specpower  acpi  Link 
0.7  Training Playbook  ec2  intel_rapl  Link 