On the impact of setting halt_poll_ns with qemu-kvm

Solution In Progress - Updated -

Issue

On the impact of setting halt_poll_ns with qemu-kvm:

  • How does halt-polling work?
  • Why does the hypervisor show less time spent in %idle than the virtual machine?
  • Why is halt-polling not accounted within the %steal variable?
  • When is halt-polling active?

Environment

Red Hat Enterprise Linux 7.3 - 7.5

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