ovnkube-network-controller-manager high CPU usage in OVNK

Total ovnkube-network-controller-manager CPU usage is 293 cores across the cluster (i.e cluster with 120 worker nodes and each worker node with 8 CPUs), effectively using 2 cores in each node

This is observed while running cluster-density-v2 workload on OVN-IC 120 node environment with Northd Incremental Processing patches i.e
OVN_IMAGE - quay.io/itssurya/dev-images:ic-scale-ovnk-v2
CNO image - quay.io/itssurya/dev-images:ic-cno-hack
I have got high latency with northd single thread CNO image ( quay.io/itssurya/dev-images:ic-cno-hack-1thread ) as well

OVN-IC without incremental processing is using 19 cores across the cluster.
Slides for this testing https://docs.google.com/presentation/d/16NMDoF52gUb-MybbAtSs16_888nLbshQYCU1Zw3WuvE/edit#slide=id.g24a34730293_0_0


Version-Release number of selected component (if applicable):
OCP 4.14
OVN_IMAGE - quay.io/itssurya/dev-images:ic-scale-ovnk-v2
CNO image - quay.io/itssurya/dev-images:ic-cno-hack

OCP 4.14
OVN_IMAGE - quay.io/itssurya/dev-images:ic-scale-ovnk-v2
CNO image - quay.io/itssurya/dev-images:ic-cno-hack

1. Deploy 120 node OCP environment on AWS
2. Apply OVN builds
3. Run node-denisty (light) and cluster-density-v2 workloads  

Total ovnkube-network-controller-manager CPU usage is 19 cores across the cluster on OVN-IC without Incremental Processing