How to enable and leverage OVS-DPDK in Openstack

I have successfully deployed openstack packstack (all-in-one) in single VM. I'm running Centos7 VM. Everything work well and able to instantiate VM over native OVS networking. I plan to have OVS-DPDK enable in my openstack. I have gone through some documentation but still not clear how to enable it. I understand Openstack Queens OVS is already DPDK support.I have seen people asking the same but no answer and I would like again to request on how I can have DPDK support to be enabled over my running openstack. Few method to change neutron configuration file or by deploying SDN controller. Hope no need to redeploy..anyway further advise would be much appreciated.

This is my current ovs version:-
ovs-vswitchd --version
ovs-vswitchd (Open vSwitch) 2.11.0
DPDK 18.11.0

I really appreciated your help and support to my question. Please assist. Thank you

Openstack and OVS are 2 different processes, which communicates via openflow rules. That is using neutron plugin which is used in OpenStack needs to configured for the ports in use. In OVS one needs to start with controller IP openstack neutron controller. Hence changes are listed as

1. use neutron or similar plugin for network configuration.
2. updated the neutron plugin config file for desired ports for OVS.
3. OVS vswitchd is started with IP address of controller.

Note: OVS binary needs to be build with DPDK libraries for having DPDK support. Do not expect by installing DPDK on the distro the OVS binary will become DPDK supported.