[dpdk-users] rte_eth_tx_burst duplicate packets

[Peter Balint <peter.balint4@gmail.com>]

Hi,

I am just writing my first a traffic generator code.
The program sends predefined quantity of frames(Ethernet/IP/UDP) in each
seconds. It use 2 loops 1 for seconds the other for the packets in each
second.

for sending I use a while loop

                sent=0;
                while (sent==0){
                    sent = rte_eth_tx_burst(eth_id, 0, &pkts, 1);

                }
for reviving
recv = rte_eth_rx_burst(eth_id, 0, pktr_burst2, 10);

in the initialization phase I put the packet in the mbuf. In the UDP data
filed is a counter which increasing in every second(with this I would like
to identify the possible packet drops er sec bases)

with lower load the program works fine but close to 100% of performance

Forward frames sent: 8000000
Forward frames received: 8000336
Reverse frames sent: 8000000
Reverse frames received: 7990793



Results  in 1 sec sent 800000  recvd  799972 and difference -28
Results  in 2 sec sent 800000  recvd  799888 and difference -112
Results  in 3 sec sent 800000  recvd  800000 and difference 0
Results  in 4 sec sent 800000  recvd  800000 and difference 0
Results  in 5 sec sent 800000  recvd  800000 and difference 0
Results  in 6 sec sent 800000  recvd  800000 and difference 0
Results  in 7 sec sent 800000  recvd  800120 and difference 120
Results  in 8 sec sent 800000  recvd  799880 and difference -120
Results  in 9 sec sent 800000  recvd  800000 and difference 0
Results  in 10 sec sent 800000  recvd  800476 and difference 476

It received more packets than sent.

Are there any solution to fix this issue?


Many Thanks,

Peter