On Fri, Aug 30, 2019 at 9:37 AM Július Milan <Julius.Milan@xxxxxxxxxxxxx> wrote: > > Hi all > > Regarding 4K frame size constraint of AF_XDP, what does AF_XDP when receives frame bigger than 4K? Drops it or cut it or split it between more frames? > Thinking about what to do with them on TX side. > > If you are interested in mentioned AF_XDP driver for vpp, here you can find it: https://gerrit.fd.io/r/c/vpp/+/21606 Hi Július, I took a look at the patch, I can passed compile but I haven't run it. In the src/plugins/af_xdp/device.c and src/plugins/af_xdp/xsk_defs.h, since you already link libbpf, you can remove a lot of existing code by using AF_XDP APIs in libbpf (see xsk_ring_*, xsk_umem_*) If you want to load your custom XDP program, you can enable XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD and load XDP program Regards, William
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