Hello,
There are testpmd commands to start/stop RxQ/TxQ: "port 1 rxq 0 stop", "port 1 txq 0 start", etc. IIUC, when a queue is stopped, testpmd should ignore it. Currently, it doesn't and tries to use the stopped queue. If a RxQ is stopped, nothing will be send to the paired TxQ. If a TxQ is stopped, there is nowhere to send the packets from the paired RxQ, so it is logical to drop them. I'm going to implement this behavior, any objections?