Description of problem:

When the scale tests create 72 RouteAdvertisements with qps=20 and burst=20 with 1:1 RA:CUDN, ovnkue-controller CPU uage is going above 800%. This is observed in all nodes (its a 18 worker node env)

 I have attached the pprof, audit logs and must-gather which captured during the testing.

Audit logs https://storage.scalelab.redhat.com/anilvenkata/bgp/rahighcpu/must-gather.local.7838236669567166586.tar.gz 

must-gather https://storage.scalelab.redhat.com/anilvenkata/bgp/rahighcpu/must-gather.local.581736730274221847.tar.gz 

RA configuration https://storage.scalelab.redhat.com/anilvenkata/bgp/rahighcpu/log_routeadvertisement_all.yaml 
CPU pprof https://storage.scalelab.redhat.com/anilvenkata/bgp/rahighcpu/pprof/ovnkube-cpu1.pprof 

Memoy pprof https://storage.scalelab.redhat.com/anilvenkata/bgp/rahighcpu/pprof/ovnkube-heap1.pprof 

This is a follow up of the bug https://issues.redhat.com/browse/OCPBUGS-54375 

Dashboard showing 800% cpu usage by ovnkube-controller