qemu-kvm high, unbalanced CPU usage; high CPU latency in VMs

Solution In Progress - Updated -


  • VMs are experiencing high vCPU latency and high pCPU usage in the hypervisor.
  • VMs are utilizing SRIOV with PCI passthrough.
  • Expect CPUs to be more evenly utilized and to report usage closer to what is shown within the VM as they generally show usage around 1/3 of what hypervisor reports
  • vCPU pinning is enabled


  • Red Hat OpenStack 7.0 (RHOS)

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