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Date: Wed, 9 Mar 2022 18:20:00 +0800 From: Carl Lei <m...@xecycle.info> To: "Benoit Ganne (bganne)" <bga...@cisco.com> Subject: Re: [vpp-dev] Question on checksum offload in veth+AF_XDP Sorry, forgot to CC list. Hi Benoit, On Wed, 9 Mar 2022 09:45:58 +0000 "Benoit Ganne (bganne)" <bga...@cisco.com> wrote: > Hi Carl, > > Indeed, there is no way in AF_XDP to detect whether the checksum is > offloaded or not. We could always add a flag but I am not sure it > would worth it. Can you try host-interface (AF_PACKET) and see if it > solves your issue: > https://s3-docs.fd.io/vpp/22.06/cli-reference/clis/clicmd_src_vnet_devices_af_packet.html > With veth, AF_XDP and AF_PACKET should have similar performance > anyway. Yes, AF_PACKET works fine, but performance is... iperf3 says 2Mbps for AF_PACKET, 7Gbps for AF_XDP. Setup is host veth - VPP veth - L2 bridge - VPP veth - container veth, by AF_PACKET I mean both VPP veths are connected by AF_PACKET, same for AF_XDP. This 7Gbps is different from my 10Gbps result yesterday, which is host veth - VPP veth - L2 bridge - VPP tap - container.
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