I have a application running on sender and receiver, with UDP protocol. The UDP buffer size is about 70 or 1024 bytes so there is no UDP fragmentation happens.
From ifconfig/sar level, I did not see significant UDP loss.
But from application level, I see ~30% loss. I see the same with iperf3/ntttcp-for-Linux/netperf.
Where does the loss happen? Is this caused by UDP arrives IP stack out-of-order? How can I confirm this assumption?
thanks!