feat: compute core ratio for local regressor

[sunya-ch]

This PR implement TODO addressed in #1732 by computing core ratio based on model machine spec and discovered spec (e.g., VM cores).

Signed-off-by: Sunyanan Choochotkaew [email protected]

[github-actions]

🤖 SeineSailor

Here is a concise summary of the pull request changes:

Summary: This pull request refactors the kepler project to accurately compute the core ratio for the local regressor, addressing a TODO from PR #1732. The changes primarily affect the config and model packages.

Key Modifications:

1. Core Ratio Calculation: The core ratio is now calculated based on the model machine spec and discovered spec (e.g., VM cores).
2. Package Refactoring: The MachineSpec struct has been replaced with config.MachineSpec from the github.com/sustainable-computing-io/kepler/pkg/config package.
3. Struct Updates: The ComponentModelWeights struct now includes config.MachineSpec, and the Regressor type has two new fields: RequestMachineSpec and DiscoveredMachineSpec.
4. Method Updates: The setCoreRatio method calculates and sets the coreRatio, and the getWeightFromServer method now accepts *r.RequestMachineSpec instead of *r.MachineSpec.

Impact: These changes improve the accuracy of core ratio calculation, which is essential for the local regressor. The refactoring also enhances code organization and consistency by using the config package's MachineSpec.

Suggestions:

• Consider adding unit tests to ensure the setCoreRatio method correctly calculates the core ratio.
• Review the createPowerModelEstimator function's implementation to ensure it correctly handles the updated core ratio calculation.
• Document the changes to the Regressor type and its new fields to facilitate understanding and maintenance.

Overall, this pull request improves the kepler project's accuracy and maintainability.