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PR #3314 .

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Next (from 25Jan RM call):

  1. How applications adopt to AF_XDP? (Now in text below)
  2. How could it work in virtualized environments? (Now in text below)
  3. How could it work on the same node with another app using DPDK/SR-IOV?

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Figure X: AF_XDP architecture

Linux-native applications can open an AF_XDP socket to receive raw packets directly from the NIC, by using libbpf library functions to register a packet buffer area where packets will be located, and to create and bind the socket to a networking interface. DPDK-based applications can use AF_XDP Poll Mode Driver. VPP-based applications can use AF_XDP Device Driver.

In virtualized environments AF_XDP could be used as interface between guest Kernel and user space application, but still need SR-IOV or virtio to get traffic to the VM.


Chapter 5

Exposed Performance Optimisation Capabilities

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