SOSCON19 XDP

Slide Deck

Demo

Repo for the performance test from the slide

Disclaimer: scripts may not work with your environment, since this test is performed in specific environment

Prerequisite

• bpftool (run ./install-bpftool.sh)
• iproute2 (TC command)
• clang, llvm (BPF compile)
• Kernel upper than 4.14 (XDP_REDIRECT)
  (depend on the driver XDP support, required version may vary. find here)
• NIC support with XDP, XDP_REDIRECT
  (if not, you can still try GENERIC XDP)

How to test?

Host to test - Run scripts under each directory drop/, forward/
Host to generate packet - Run script under pktgen/
(Regarding with pktgen, follow the instruction from '-h' option)

ex)
Host A: # ./pktgen/pktgen.sh -i enp1s0f0 -d 10.1.0.2 -m 90:e2:ba:c5:05:89 -t 4
Host B: # ./drop/xdp-drop.sh 10.1.0.2 1234 eth0

Packet Drop

Environment:
XDP - Mellanox ConnectX-4 (mlx5)
XDP OFFLOAD - Netronome Agilio (nfp)

1. Userspace - UDP socket
2. Netfilter - iptables DROP
3. TC - ingress qdisc filter DROP
4. XDP - XDP_DROP
5. XDP OFFLOAD - XDP_DROP

Packet Forward

Environment:
XDP - Mellanox ConnectX-4 (mlx5)

1. Userspace - NGINX stream
2. Netfilter - iptables DNAT
3. TC - ingress qdisc filter mirred redirect
4. XDP - XDP_REDIRECT

To find out more

• IOVISOR XDP
• BPF and XDP Reference Guide
• KERNEL BPF(XDP) SAMPLES
• XDP TUTORIAL
• Latest BPF SOURCE bpf-next