On 22.11.2019 18:51, William Tu wrote: > Hi Ilya and Eelco, > > Yiyang reports very poor TCP performance on his setup and I can > also reproduce it on my machine. Somehow I think this might be a > kernel issue, but I don't know where to debug this. Need your suggestion > about how to debug. > > So the setup is like the system-traffic, creating 2 namespaces and > veth devices and attach to OVS. I do remember to turn off tx offload > and ping, UDP, nc (tcp-mode) works fine. > > TCP using iperf drops to 0Mbps after 4 seconds.
The key questions are: * What is your kernel version? * Does it work in generic mode? * Does it work if iperf generates UDP traffic? ex. iperf3 -c 10.1.1.1 -t 3600 -u -b 10G/64 -l 1460 * It seems like a ring breakage or a umem memory leak. So, what are the afxdp related coverage counters? * Does OVS forward packets, i.e. if there something received/sent? Best regards, Ilya Maximets. _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
