Hi Onkar, Thanks for your email. Your setup isn't very clear to me, so a few queries in-line.
On 04/10/2018 06:06, Onkar Pednekar wrote: > Hi, > > I have been experimenting with OVS DPDK on 1G interfaces. The system has > 8 cores (hyperthreading enabled) mix of dpdk and non-dpdk capable ports, > but the data traffic runs only on dpdk ports. > > DPDK ports are backed by vhost user netdev and I have configured the > system so that hugepages are enabled, CPU cores isolated with PMD > threads allocated to them and also pinning the VCPUs.> > When I run UDP traffic, I see ~ 1G throughput on dpdk interfaces with < > 1% packet loss. However, with tcp traffic, I see around 300Mbps > thoughput. I see that setting generic receive offload to off helps, but > still the TCP thpt is very less compared to the nic capabilities. I know > that there will be some performance degradation for TCP as against UDP > but this is way below expected. > When transmitting traffic between the DPDK ports, what are the flows you have setup? Does it follow a p2p or pvp setup? In other words, does the traffic flow between the VM and the physical ports, or only between physical ports? > I don't see any packets dropped for tcp on the internal VM (virtual) > interfaces. > > I would like to know if there is an settings (offloads) for the > interfaces or any other config I might be missing. What is the MTU set on the DPDK ports? Both physical and vhost-user? $ ovs-vsctl get Interface [dpdk0|vhostuserclient0] mtu This will help to clarify some doubts around your setup first. Tiago. > > Thanks, > Onkar > > > _______________________________________________ > discuss mailing list > [email protected] > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss > _______________________________________________ discuss mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
