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where 0000:17:00.0 and 0000:ca:00.0 identify the GPUs through their Bus ID (found e.g. with "lspci | grep NVI" command).

  • to verify which GPU is attached to a VM and its associated NUMA node, execute from the hypervisor the following commands:

    Code Block
    [root@cld-dfa-gpu-04 ~]# virsh dumpxml instance-001f81d1
...
   <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x17' slot='0x00' function='0x0'/>
      </source> 

[root@cld-dfa-gpu-04 ~]# virsh nodedev-dumpxml pci_0000_17_00_0
...
    <product id='0x25b6'>GA107GL [A2 / A16]</product>
    <vendor id='0x10de'>NVIDIA Corporation</vendor>
    <capability type='virt_functions' maxCount='16'/>
    <iommuGroup number='20'>
      <address domain='0x0000' bus='0x17' slot='0x00' function='0x0'/>
    </iommuGroup>
    <numa node='0'/>

    i.e. look at the hostdev with the driver vfio to find the source PCI bus ID, and then look in more details at the pci_0000_17_00_0 device to find the GPU model and the NUMA node associated to it.