The patch series adds AF_XDP async xmit support for veth device. First patch add a new API for supporting non-physical NIC device to get packet's virtual address. The second patch implements the async xmit, and last patch adds example use cases.
I tested with 2 namespaces, one as sender, the other as receiver. The packet rate is measure at the receiver side. ip netns add at_ns0 ip link add p0 type veth peer name p1 ip link set p0 netns at_ns0 ip link set dev p1 up ip netns exec at_ns0 ip link set dev p0 up # receiver ip netns exec at_ns0 xdp_rxq_info --dev p0 --action XDP_DROP # sender with AF_XDP xdpsock -i p1 -t -N -z # or sender without AF_XDP xdpsock -i p1 -t -S Without AF_XDP: 724 Kpps RXQ stats RXQ:CPU pps issue-pps rx_queue_index 0:1 724339 0 rx_queue_index 0:sum 724339 With AF_XDP: 1.1 Mpps (with ksoftirqd 100% cpu) RXQ stats RXQ:CPU pps issue-pps rx_queue_index 0:3 1188181 0 rx_queue_index 0:sum 1188181 v1->v2: - refactor the xsk_umem_consume_tx_virtual - use the umems provided by netdev - fix bug from locating peer side rq with qid William Tu (3): xsk: add xsk_umem_consume_tx_virtual. veth: support AF_XDP. samples: bpf: add veth AF_XDP example. drivers/net/veth.c | 199 ++++++++++++++++++++++++++++++++++++++++- include/net/xdp_sock.h | 7 ++ net/xdp/xdp_umem.c | 1 + net/xdp/xsk.c | 21 ++++- samples/bpf/test_veth_afxdp.sh | 67 ++++++++++++++ 5 files changed, 291 insertions(+), 4 deletions(-) create mode 100755 samples/bpf/test_veth_afxdp.sh -- 2.7.4
