Does virtio-net multiqueue use all queues by default?

Solution Verified - Updated -

Issue

  • Does virtio-net multiqueue use all queues by default?
  • RHV VMs receiving inconsistent receive-side-scaling / interface multiqueue numbers with identical VM configurations.
  • RHEL 6 guests with multiqueue enabled in VM settings and more than one vCPU do not get multiqueue. RHEL 7 guests appear to be working.

Environment

  • Red Hat Enterprise Linux
  • KVM virtualization (libvirt, RHV, OpenStack)
  • virtio-net paravirtualized network device
  • Multiple RSS queue support on hypervisor

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