how write external applications as the custom pox controller?

Question

I want to write external applications as the custom pox controller, to calculate execution time of task?

task offloading in MEC based SDN using mininet and pox controller SDN controller sponsible for collecting information from different planes. The general idea of the network view is to keep an eye on the system’s performance. If the system changes, the system status variables are updated immediately, accompanied by a current status evaluation to anticipate the system’s future status. The control plane periodically requests the data plane and infrastructure plane to update their information.