On Tue, Jun 2, 2020 at 9:31 PM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote: > > maharishi bhargava <bhargavamaharishi@xxxxxxxxx> writes: > > > On Tue 2 Jun, 2020, 14:31 Toke Høiland-Jørgensen, <toke@xxxxxxxxxx> wrote: > >> > >> maharishi bhargava <bhargavamaharishi@xxxxxxxxx> writes: > >> > >> > Hi, in my XDP program, I want to redirect some packets using AF_XDP > >> > and redirect other packets directly from driver space. > >> > Redirection through AF_XDP works fine, but redirection through dev map > >> > stops after some packets are processed. > >> > >> Do you mean it stops even if you are *only* redirecting to a devmap, or > >> if you are first redirecting a few packets to AF_XDP, then to devmap? > >> > >> Also, which driver(s) are the physical NICs you're redirecting to/from > >> using, and which kernel version are you on? > >> > >> -Toke > > > > > > > > Currently, I'm trying to redirect packets only using devmap. But also > > have code for redirection using AF_XDP(only when a given condition is > > satisfied). A DPDK program is running in userspace which will receive > > packets from AF_XDP. > > Right, so it's just devmap redirect that breaks. What do you mean > 'redirection stops', exactly? How are you seeing this? Does xdp_monitor > (from samples/bpf) report any exceptions? > > -Toke > So, In my setup, there are three systems, Let's Assume A, B, C. System B is acting as a forwarder between A and C. So I can see the number of packets received at system C. To be specific, only 1024 packets are received. If I remove the xsks_map part from the code and don't run DPDK in userspace. This problem does not occur. Also if I forward all the packets using AF_XDP, there is no such issue. - Maharishi
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