Regression Detected in Kepler or kube-apiserver CPU Utilization Performance

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Regression detected from the following reports:

Report: https://sustainable-computing-io.github.io/kepler-metal-ci/kepler-stress-test-metrics.html

Details:
Significant Regression Detected

The test results from the last two days, specifically on 2024-07-31, show a substantial increase in both the Mean Kepler CPU Utilization and the Standard Deviation (Std Dev) percentages, indicating a significant performance regression.

Detailed Analysis:

• On 2024-07-31 at 18:18:00Z, the Mean Kepler CPU Utilization was recorded at 0.3280331034%, which is a dramatic increase from the previous day's value of 0.0597766338% on 2024-07-30 at 18:15:51Z.
• Similarly, the Std Dev on 2024-07-31 at 18:18:00Z increased to 0.2598348881% from 0.0362022150% on the previous day.
• A second test on the same day (2024-07-31 at 19:50:43Z) also showed elevated levels with a Mean Kepler CPU Utilization of 0.3038928317% and a Std Dev of 0.2290510851%.

Conclusion:
The data from the last two days clearly indicates a significant performance regression based on the defined criteria of increases in CPU utilization and Std Dev. This suggests that changes made prior to the 2024-07-31 tests could be negatively impacting performance, warranting further investigation and potentially rolling back recent changes or optimizations.