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How to control state selection?
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CPU Power Saving Methods for Real-time Workloads
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- 1 Background
- 2 Introduction
- 3 Why do we need this?
- 4 Focus on Determinism
- 5 Where does the jitter come from?
- 6 How to control state selection?
- 7 2 Methods corresponding to Attributes
- 8 C State Exit Latency Constraint
- 9 Filter C States by Exit Latencies
- 10 Filter C States by Target Residencies
- 11 Name the 2 methods
- 12 C State Selection Policy in Kernel
- 13 PM QoS (Quality of Service) Framework
- 14 Recap
- 15 Calibrate Worst-case latency
- 16 Find Safe Latency Constraint
- 17 Find Safe Idle Interval
- 18 Example Calibration
- 19 Example Tuning
- 20 Additional Strategies
- 21 Key Takeaways
- 22 References
- 23 Linux Foundation Wiki
