Chapter 6. Single Root I/O Virtualization

Single Root I/O Virtualization (SR-IOV) is a standard developed by the Peripheral Component Interconnect Special Interest Group (PCI-SIG) that works in conjunction with system chipset support for virtualization technologies. SR-IOV enables network traffic to bypass the software switch layer of the Hyper-V virtualization stack to allow SR-IOV–capable devices to be assigned directly to a virtual machine. It does this by providing remapping of interrupts and DMA.

Hyper-V in Windows Server 2012 includes built-in support for SR-IOV–capable network devices to allow an SR-IOV virtual function of a physical network adapter to be assigned directly to a virtual machine. This increases network throughput and reduces ...

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