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Classroom Contents
Mitigating Excessive Pause-Loop-Exiting in VM-Agnostic KVM
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- 1 Intro
- 2 Oversubscribing virtual CPUs
- 3 Critical section on PCPU
- 4 Improving guest performance by solving excessive vCPU spinning
- 5 KVM approach with hardware feature
- 6 KVM's strategy to suppress PLE events
- 7 What happens in the worst case!
- 8 Continuous PLE events are NOT rare
- 9 Why PLE events occur continuously?
- 10 How to select candidate vCPU
- 11 Mitigation: Strict Boost
- 12 Problem: Scheduler Mismatch
- 13 Case Study: Scheduler Mismatch
- 14 Mitigation: Debooster
- 15 Implementation
- 16 Experimental Setup
- 17 Evaluation: Reduction of PLE Occurrences
- 18 Evaluation System Fairness
- 19 Conclusion
