Hi Dom, Now that you mention it, it’s the same for my nics. Nonetheless, the packets that reach ip4-local are marked as having a valid l4 checksum. Check in ip4_local_check_l4_csum_x2 and ip4_local_check_l4_csum if ip4_local_l4_csum_validate is called or not. If not, there’s no extra overhead in processing the udp packets.
Regards, Florin > On Feb 19, 2020, at 11:54 AM, dchons via Lists.Fd.Io > <dchons=akouto....@lists.fd.io> wrote: > > [Edited Message Follows] > > ** Edit **: Corrected typo, udp-cksum not active in rx-offloads, but is > active in tx-offloads > > Hi Florin, > > Thanks for the response. I'm not so concerned about the packet drops (as you > point out it is to be expected), however increasing the number of rx > descriptors did help a lot, so thank you very much for that! > > I'm still at around 6.5 Gbps, "sh session verbose" shows the following: > Client (TX) side: > Connection State Rx-f > Tx-f > [#1][U] 10.0.0.70:11202->10.0.0.71:9999 - 0 > 999985 > Thread 1: active sessions 1 > > Server (RX) side: > vpp# sh session verbose > Connection State Rx-f > Tx-f > [#0][U] 10.0.0.71:9999->0.0.0.0:0 - 0 0 > > Any thoughts on udp-cksum not being enabled? I'm debating whether it's worth > trying to debug why it's not in the active rx offloads even though it shows > as available (and it is in the active tx offloads). > > Thanks, > Dom >
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