On Wed, 17 May 2023 00:52:25 +0200 Lorenzo Bianconi wrote: > I am testing this RFC patch in the scenario reported below: > > iperf tcp tx --> veth0 --> veth1 (xdp_pass) --> iperf tcp rx > > - 6.4.0-rc1 net-next: > MTU 1500B: ~ 7.07 Gbps > MTU 8000B: ~ 14.7 Gbps > > - 6.4.0-rc1 net-next + page_pool frag support in veth: > MTU 1500B: ~ 8.57 Gbps > MTU 8000B: ~ 14.5 Gbps > > side note: it seems there is a regression between 6.2.15 and 6.4.0-rc1 net-next > (even without latest veth page_pool patches) in the throughput I can get in the > scenario above, but I have not looked into it yet. > > - 6.2.15: > MTU 1500B: ~ 7.91 Gbps > MTU 8000B: ~ 14.1 Gbps > > - 6.4.0-rc1 net-next w/o commits [0],[1],[2] > MTU 1500B: ~ 6.38 Gbps > MTU 8000B: ~ 13.2 Gbps If the benchmark is iperf, wouldn't working towards preserving GSO status across XDP (assuming prog is multi-buf-capable) be the most beneficial optimization?
