iptables-alerter pod under openshift-network-operator namespace is using up a large chunk of cpu on SNO with DU configuration 

Without workload (idle-state):
Avg: 0.019 cores
Max: 1.063 cores

With reference DU workload:
Avg: 0.020 cores
Max: 1.022 cores  

Overall openshift-network-operator sees a ~380.5% in cpu usage between ocp 4.15.2 and 4.16.0-rc.1

    ocp 4.16.0-rc.1

1. Install OCP 4.16.0-rc.1 SNO and apply DU configs
2. Observe cpu usage over a steady period of two hours each (6 iterations) with and without workloads

    1.
    2.
    3.
    

openshift-network-operator namespace cpu usage is 380% higher in 4.16.0-rc.1 compared to ocp 4.15 

Cpu usage of openshift-network-operator namespace  between releases should be comparable