> Björn Töpel <bjorn.to...@gmail.com> writes: > > > Is this a good idea? I have only measured for AF_XDP redirects, but > > all XDP_REDIRECT targets should benefit. For AF_XDP the rxdrop > > scenario went from 21.5 to 23.2 Mpps on my machine.
Do remember that you are reporting saving 3.4 nanosec (from 21.5 to 23.2 Mpps). For comparison a function call cost around 1.2 ns, and I think you have avoided two function calls xdp_do_redirect() and dev_map_enqueue() (the rest should be inlined by compiler). Thus, that alone account for 2.4 ns. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
