tree f776e9a5cb46b98c4148f83a3f960022dd3c142e
parent 4acf6c0b84c91243c705303cd9ff16421914150d
author Brenden Blanco <bblanco@plumgrid.com> 1468955817 -0700
committer David S. Miller <davem@davemloft.net> 1468989993 -0700

bpf: add sample for xdp forwarding and rewrite

Add a sample that rewrites and forwards packets out on the same
interface. Observed single core forwarding performance of ~10Mpps.

Since the mlx4 driver under test recycles every single packet page, the
perf output shows almost exclusively just the ring management and bpf
program work. Slowdowns are likely occurring due to cache misses.

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>