Perftune ci cd

[vladzcloudius]

This pull request introduces a comprehensive unit testing framework for perftune.py, improves its testability, and adds a new GitHub Actions workflow for automated testing. The main changes include adding dataclass-based parsing for ethtool output, improving the handling of network queue counts (especially for Mellanox devices), and restructuring the script to support direct import and testing. Additionally, the PR sets up the necessary dependencies and configuration for robust test coverage.

Testing infrastructure and configuration:

• Added a GitHub Actions workflow (.github/workflows/perftune-tests.yaml) to automatically run unit tests on changes to perftune.py and its tests, ensuring continuous integration for performance tuning scripts.
• Introduced a pyproject.toml configuration for pytest and coverage, and added a requirements.txt file specifying all required dependencies for running tests. [1] [2]
• Added a detailed README.md in scripts/tests/perftune/ with setup, usage instructions, and test layout documentation.

Test suite and support:

• Created a conftest.py to safely import perftune.py as a module for testing, avoiding accidental script execution.
• Added a comprehensive unit test file for the ClocksourceManager class (test_clocksource.py), covering various scenarios and platform behaviors.

Codebase improvements for testability and maintainability:

• Refactored perftune.py to use a main() function and guarded script entry with if __name__ == '__main__':, enabling import without side effects. [1] [2]
• Introduced dataclass-based parsing for ethtool -l output, including new LabeledDataclass, EthtoolChannelPropertiesValues, and EthtoolLChannelInfo classes, to make parsing more robust and testable. [1] [2]
• Improved handling of network queue counts and RPS (Receive Packet Steering) setup, especially for Mellanox mlx5 devices, to ensure correct queue detection and assignment. [1] [2] [3]

These changes collectively provide a solid foundation for reliable, automated testing of perftune.py and facilitate future maintenance and enhancements.