Dynamic assignment of device queues to virtual functions to provide to virtual machines

A system for assigning queues to virtual functions used to access physical functions of a device, comprising:

• a hardware device having hardware logic that when operable performs operations, the operations comprising:
• assigning queues to a virtual function to access the physical functions of the device;
• providing the virtual function to a virtual machine to use to access the physical functions of the device;
• determining a utilization of the queues assigned to the virtual function accessed by the virtual machine;
• and
• changing a number of the queues assigned to the virtual functions for requests submitted by the virtual machine in response to the determined utilization.

A method for assigning queues to virtual functions used to access physical functions of a device, comprising:

• assigning queues to a virtual function to access the physical functions of the device;
• providing the virtual function to a virtual machine to use to access the physical functions of the device;
• determining a utilization of the queues assigned to the virtual function accessed by the virtual machine;
• and
• changing a number of the queues assigned to the virtual functions for requests submitted by the virtual machine in response to the determined utilization.