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

Detailed Analysis and Conclusion:
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) compared to the previous days' results. Here are the specific figures:

• On 2024-07-31 at 18:18:00Z:

  • Mean Kepler CPU Utilization: 0.3280331034% (previously around 0.06% on average)
  • Std Dev: 0.2598348881% (previously around 0.03% on average)

• On 2024-07-31 at 19:50:43Z:

  • Mean Kepler CPU Utilization: 0.3038928317%
  • Std Dev: 0.2290510851%

These values represent a more than fivefold increase in CPU utilization and a nearly eightfold increase in variability (Std Dev), indicating a significant performance regression. This drastic change suggests potential issues in the system or test environment that need immediate investigation to identify the root cause and mitigate any negative impacts on system performance and stability.