QNAP

QuTS hero 5.0.x

Viewing SR-IOV Device Settings

You can view all Single Root I/O Virtualization (SR-IOV) devices mapped to your virtual machines on the Control Panel > Hardware > Hardware Resources page. The SR-IOV interface is a hardware specification that allows a single PCIe device, such as a network adapter, to appear as multiple physical devices to the hypervisor. Because each device is directly assigned to an instance, it can bypass the hypervisor and virtual switch layer to achieve low latency and performance matching in nonvirtualized environments. SR-IOV achieves this through the following types of functions:

  • Physical Function (PF): These are PCIe devices that have SR-IOV capabilities. PFs are managed and configured in the same way as PCIe devices.

  • Virtual Function (VF): These are lightweight PCIe functions that only process I/O. Because each VF is derived from a PF, the device hardware limits the number of VFs a device can have. A VF shares one or more hardware resources of the device, such as a memory or network port.

    The following table lists all SR-IOV functions you can view in Hardware Resource:

No.

Settings

Description

1

Hardware Devices

Lists all the SR-IOV devices that are mapped to your virtual machine (VM).

2

Physical Function/Virtual Function

Displays the physical function (PF) or virtual function (VF) configured to the SR-IOV device.

3

Virtual Machine

Shows the virtual machines that are mapped to the PF or VF.

4

Resize

Click to enlarge or minimize the SR-IOV device panel window.

5

Show or Hide

Click to show or hide the list of SR-IOV device details.

6

Slot/Port

Shows the slot/port type and slot/port number.

For details on how to configure an SR-IOV device to a VM, see the Virtualization Station user guide.