<div><font>Hi，I encount a bug when I use iperf3 to generate udp flows, which would makes ovs-dpdk port can't receive packets，while tcp flows seem wouldn't. </font>There is details below.</div><div>The test topology is 2 VMs installed iperf3 connecting to 1 VM installed ovs-dpdk,which NIC is e1000. </div><div>My iperf3 comand is:</div><div>iperf3 -s -i 1</div><div>iperf3 10.1.3.4 -u -b 1G -w6m -t 36000 </div><div><br></div><div>Ovs's flow-table is</div><div><div> cookie=0x0, duration=2319.958s, table=0, n_packets=74802603, n_bytes=104773394087, in_port=dpdk2 actions=output:dpdk1</div><div> cookie=0x0, duration=2319.958s, table=0, n_packets=89, n_bytes=5572, in_port=dpdk1 actions=output:dpdk2</div></div><div><br></div><div>But after for about 10s minutes or 1h longer, the iperf3 server can't receive any packets unless restart ovs.Then I stop iperf3, let hosts ping each other, gdb ovs-dpdk and found that rte_eth_rx_burst() always return 0 at one of the ports, meanning it can't receive any packets. </div><div><br></div><div>iperf3 message is like below:</div><div><div>[ 5] 2727.00-2728.00 sec 24.2 MBytes 203 Mbits/sec 0.042 ms 0/3098 (0%)</div><div>[ 5] 2728.00-2729.00 sec 26.5 MBytes 222 Mbits/sec 0.100 ms 0/3389 (0%)</div><div>[ 5] 2729.00-2730.00 sec 27.5 MBytes 231 Mbits/sec 0.079 ms 0/3522 (0%)</div><div>[ 5] 2730.00-2731.00 sec 25.1 MBytes 210 Mbits/sec 0.213 ms 9/3219 (0.28%)</div><div>[ 5] 2731.00-2732.00 sec 11.2 MBytes 94.1 Mbits/sec 0.042 ms 0/1436 (0%)</div><div>[ 5] 2732.00-2733.00 sec 0.00 Bytes 0.00 bits/sec 0.042 ms 0/0 (0%)</div><div>[ 5] 2733.00-2734.00 sec 0.00 Bytes 0.00 bits/sec 0.042 ms 0/0 (0%)</div><div>[ 5] 2734.00-2735.00 sec 0.00 Bytes 0.00 bits/sec 0.042 ms 0/0 (0%)</div><div>[ 5] 2735.00-2736.00 sec 0.00 Bytes 0.00 bits/sec 0.042 ms 0/0 (0%)</div><div>[ 5] 2736.00-2737.00 sec 0.00 Bytes 0.00 bits/sec 0.042 ms 0/0 (0%)</div></div><div><br></div><div><br></div><div>ovs_log message is:</div><div><div><br></div><div>2022-04-20T14:40:10.483Z|00109|bridge|INFO|ovs-vswitchd (Open vSwitch) 2.13.0</div><div>2022-04-20T14:40:10.685Z|00110|connmgr|INFO|br0<->unix#6: 3 flow_mods in the last 0 s (2 adds, 1 deletes)</div><div>2022-04-20T14:40:10.728Z|00111|netdev_dpdk|WARN|Failed to enable flow control on device 0</div><div>2022-04-20T14:40:10.728Z|00112|netdev_dpdk|WARN|Failed to enable flow control on device 1</div><div>2022-04-20T14:40:15.150Z|00001|netdev_dpdk(dpdk_watchdog1)|DBG|Port 0 Link Up - speed 1000 Mbps - full-duplex</div><div>2022-04-20T14:40:15.151Z|00002|netdev_dpdk(dpdk_watchdog1)|DBG|Port 1 Link Up - speed 1000 Mbps - full-duplex</div><div>2022-04-20T14:40:18.662Z|00113|memory|INFO|228596 kB peak resident set size after 10.5 seconds</div><div>2022-04-20T14:40:18.662Z|00114|memory|INFO|handlers:2 ports:3 revalidators:2 rules:6 udpif keys:6</div></div><div><br></div><div><br></div><div>Could you please tell me how to solve this issue? I would appreciate it!!!</div><div><font><br></font></div><div><sign signid="99"><div><font><br></font><font><br></font><font><br></font><font><br></font><div style="color:#909090;font-family:Arial Narrow;font-size:12px"></div></div><div style="font-size:14px;font-family:Verdana;color:#000;"><div style="overflow:hidden;"><div class="l_box" style="float:left;height:100px;margin:35px 10px 10px 0;padding:0 10px 0 15px;border-right:1px solid #dedede;"><div class="logo" style="max-height: 150px;overflow: hidden;margin:35px 0 0 0;float:left;"><img src="https://exmail.qq.com/cgi-bin/viewfile?type=logo&domain=bupt.edu.cn" onerror=""></div></div><div class="c_detail" style="float:left;padding-top:35px;line-height:22px;color:#a0a0a0;zoom:1;"><h4 class="name" style="margin:0;font-size:14px;font-weight:bold;line-height:28px;color:#000;zoom:1;">刘峰麟</h4><p class="department" style="margin:0;">北京邮电大学/研究生/计算机学院（国家示范性软件学院）</p><p class="phone" style="margin:0;"></p><p class="addr" style="margin:0;line-height:22px;color:#a0a0a0;">北京</p></div></div></div></sign></div><div> </div><div><tincludetail></tincludetail></div>