[dev][nova] PCI IRQ Affinity for VMS with dedicated CPUs

Soares Sarto, Ricardo Ricardo.SoaresSarto at windriver.com
Thu Jun 24 20:09:25 UTC 2021


Hello Everyone,

Does NOVA provide any intelligent affining of IRQs of PCI Devices to CPUs
pinned to VMs?

i.e. for VMs that have pci-passthrough interfaces to PCI devices and are
      using ‘dedicated’ CPU policy, does NOVA automatically affine the IRQs
      for those PCI devices the CPUs that are allocated to the VM?

Furthermore, is there any flavor extraspec that can further scope the IRQ
affinity of the PCI Devices to a subset of the VM’s dedicated cpus?

If not, is this a new capability that the NOVA team would be open to?

-rsoaress
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