Re: [PATCH bpf-next v4 1/2] bpf, xdp: make bpf_redirect_map() a map operation

Björn Töpel [off-list ref] writes:

On 2021-02-26 12:40, Björn Töpel wrote:

quoted

On 2021-02-26 12:37, Toke Høiland-Jørgensen wrote:

[...]

quoted

quoted

(That last paragraph above is why I asked if you updated the performance
numbers in the cover letter; removing an additional function call should
affect those, right?)

Yeah, it should. Let me spend some more time benchmarking on the DEVMAP
scenario.

I did a re-measure using samples/xdp_redirect_map.

The setup is 64B packets blasted to an i40e. As a baseline,

   # xdp_rxq_info --dev ens801f1 --action XDP_DROP

gives 24.8 Mpps.


Now, xdp_redirect_map. Same NIC, two ports, receive from port A,
redirect to port B:

baseline:    14.3 Mpps
this series: 15.4 Mpps

which is almost 8%!

Or 5 ns difference:

10**9/(14.3*10**6) - 10**9/(15.4*10**6)
4.995004995005004

Nice :)

-Toke