https://github.com/aterlo/afxdp-rs afxdp-rs provides a Rust interface to AF_XDP. The docs.rs build is broken right now but at high level this provides: - Mem mapped area - Umem (completion queue and fill queue) - AF_XDP sockets (Tx/Rx, Tx-only, Rx-only) - Buf (to represent a packet). Templated to allow user customization. - BufPool to manage Bufs (this doesn't do much in the sample programs but is useful in more complicated scenarios) - 1 link and 2 link forwarding examples Performance Test System: * Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz * Single X710 (4 physical 10G ports) (i40e) * Kernel: 5.4.2-300.fc31.x86_64 * Kernel boot args: skew_tick=1 mitigations=off selinux=0 isolcpus=4-27 nohz_full=4-27 rcu_nobcs=4-27 default_hugepagesz=1G hugepagesz=1G hugepages=4 Traffic Generator: * Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz * Single X710 (4 physical 10G ports) (i40e) * Traffic goes from one port, through test system and to second port on the same X710 * T-Rex traffic generator (https://trex-tgn.cisco.com/) (DPDK) * 64-byte UDP packets Scenario 1: l2fwd-2link on a single core running userspace and NAPI Small amounts of packet loss start at about 6.5M packets-per-second (PPS) unidirectional and 6.0M PPS bi-directional (3M each direction). Little effort has been put into optimizing this so I expect there are some easy performance wins still.
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