bandwidth decrease using dpdk module vrouter

[gaojinghua]

We are using Opencontrail vrouter R3.2 branch and build the dpdk vrouter rpm.
however, we compared the performance between kernel-vrouter and dpdk-vrouter, found that, kernel-vrouter has 6.XG bandwidth, but the dpdk-vrouter only have 4.XG bandwidth. But dpdk-vrouter's PPS is better than kernel-vrouter, which is same as your mentioned in some contrail vrouter documents.

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1. test path is
   vm1--->vrouter in host1--->host1 NIC ---> host2 NIC ---> vrouter in host2 --->vm2
2. physical bandwidth of NIC is 10G
3. host1 and host2 is numa framework.
4. we set hugepages to 1G, and kvm use mem-path to use hugepages

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could you pls tell me whether the performance is influenced when we use memory in different numa node, and when NIC and CPU cores pinned to dpdk-vrouter is in different numa node?
could you pls give me some advices what may affect this performance? how to improve dpdk-vrouter performance?

any suggestions and advices will be appreciated！