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sameo/kvm-tuning.md

Created February 10, 2020 12:24
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kvm-tuning.md

Data gathering

Mitigations

  • CPU pinning and reservation (No steal time)
  • CPU flags (-qemu64)
  • Heavy weight vs light weight exits
  • Avoid scheduling events on idle vCPUs
  • vhost-user based IO: Poll mode drivers
  • passthrough
  • Reduce timer interrupts
  • CPU stolen time

Links

https://www.qemu.org/2019/11/15/micro-optimizing-kvm-vmexits/ https://github.com/brendangregg/bpf-perf-tools-book/tree/master/originals/Ch16_Hypervisors

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