Dear all, while using rte_eth_tx_burst() to send packets in batches, I see that, sometimes, the amount of packets that the function says are sent, are not actually sent.
I am accumulating the return value of rte_eth_tx_burst() in a variable and, at the end of the job, the value of the accumulator is greater than the value of "opackets" in the device "eth_stats". I see the same number of transmitted packets in eth_stats, eth_xstats and on the other side of the cable, and this number is less than the sum of the values returned by rte_eth_tx_burst(). So, my question is: in what case the rte_eth_tx_burst() function returns a value that does not correspond to the real number of transmitted packets? According to the documentation, the function is returning only the number of packets that have been successfully inserted in the ring, so I assumed the return value was reliable. Testbed: NIC: Intel 82599ES DPDK driver: igb_uio DPDK version: 18.05 Traffic: UDP packets, sized 174B, with IP and UDP checksum offload Thanks! --- Amedeo
