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 significant increase in both the Mean Kepler CPU Utilization and the Standard Deviation (Std Dev) percentages, indicating a 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 substantial 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 dramatically to 0.2598348881% from 0.0362022150% on the previous day.
• A second test on the same day (2024-07-31 at 19:50:43Z) confirmed the trend with a Mean Kepler CPU Utilization of 0.3038928317% and a Std Dev of 0.2290510851%.

Conclusion:
The data clearly shows a significant increase in CPU utilization and variability in the test results from 2024-07-31, which meets the criteria for a performance regression as defined by an increase in CPU utilization or Std Dev. This suggests that there may be underlying issues in the system or changes introduced that negatively impacted performance. Further investigation and analysis would be required to pinpoint the exact cause and to implement corrective measures.