NIC: Intel 82599ES DPDK version: 17.08.1
My test model is like this： Host A send request packet to host B，when host B receive the request packet，host B send replay packet to host A。Then host A send next request to host B ... When the request packet size is less than or equal to 128 bytes, it works fine. the round trip latency is less than 12us. But if the packet size is more than 128 bytes（even 129bytes),The latency is more than 400us。 I find that most of the time consumed in the receiving package. In my application, I call the rte_eth_tx_burst() about every 1us. What may be the cause? The NIC or dpdk driver receive packet made some batch?
