The response time of a floodlight controller can be calculated by measuring the time it takes for the controller to react to a specific event or request. This can be done by sending a command to the controller and measuring the time it takes for the controller to respond to the command.

Here are the steps you can follow to calculate the response time of a floodlight controller:

Determine the event or request you want to use to measure the response time of the controller. For example, you could measure the response time of the controller to a request to turn on a specific light.

Use a tool such as Wireshark to capture the network traffic between the floodlight controller and the device sending the request.

Send the request to the floodlight controller and record the time the request was sent.

Monitor the network traffic in Wireshark and record the time the response was received.

Calculate the response time by subtracting the time the request was sent from the time the response was received.

Repeat the process multiple times to get an average response time.

It's worth noting that the response time of a floodlight controller can be affected by various factors such as the network latency, processing power of the controller, and the load on the network. Therefore, it's important to perform multiple tests under different conditions to get an accurate measurement of the response time.