Re: [PATCH bpf-next v2 0/8] Simplify xdp_do_redirect_map()/xdp_do_flush_map() and XDP maps

Jesper Dangaard Brouer
2019-12-19T07:18:30Z

On Thu, 19 Dec 2019 07:09:58 +0100
Björn Töpel <bjorn.topel@gmail.com> wrote:

> $ sudo ./xdp_redirect_cpu --dev enp134s0f0 --cpu 22 xdp_cpu_map0
^^^^^^^^^^^^
>
> Running XDP/eBPF prog_name:xdp_cpu_map5_lb_hash_ip_pairs
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> XDP-cpumap CPU:to pps drop-pps extra-info
> XDP-RX 20 7723038 0 0
> XDP-RX total 7723038 0
[...]

Talking about how to invoke the 'xdp_redirect_cpu' program, I notice
that you are using BPF-prog named: 'xdp_cpu_map5_lb_hash_ip_pairs'
(default) but on cmdline it looks like you want 'xdp_cpu_map0'.
You need to use '--prog xdp_cpu_map0'. It will make a HUGE performance
difference.

Like:
sudo ./xdp_redirect_cpu --dev mlx5p1 --cpu 22 --prog xdp_cpu_map0

(p.s. The load-balance hash_ip_pairs is the default, because it is
usable for solving the most common issue, where the NIC is not
RSS distributing traffic correctly, e.g. ixgbe Q-in-Q. And it is close
to the Suricata approach.)
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer