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Cornelis Technical Documentation

5.3.6. Configure and Verify SR-IOV

  1. Before enabling VFs, confirm that the CN5000 PF reports the expected VF count (7):

    cat /sys/bus/pci/devices/<DOMAIN:BUS:DEVICE.FUNCTION>/sriov_totalvfs

    Note

    To locate your PCIe device address, run:

    lspci -D -d 0x434e:

    -D displays the full DOMAIN:BUS:DEVICE.FUNCTION prefix while -d 0x434e specifies the Cornelis Networks' PCI vendor ID.

  2. Ensure that the HFI1 driver is loaded before continuing to the next step.

  3. To enable VFs on a PF:

    echo 7 > /sys/bus/pci/devices/<DOMAIN:BUS:DEVICE.FUNCTION>/sriov_numvfs

  4. To confirm creation of the VFs, run lspci again and you should see 7 new pci devices with the same domain, bus, and device values as the PF but with the function value enumerating from 1 to 7.

    <DOMAIN.BUS.DEVICE.X> Fabric controller: Cornelis Networks CN5000…

  5. To disable VFs on a PF:

    echo 0 > /sys/bus/pci/devices/<DOMAIN:BUS:DEVICE.FUNCTION>/sriov_numvfs