How can I measure the performance and TCP RTT of my server code?

Question

I created a basic TCP server that reads incoming binary data in protocol buffer format, and writes a binary msg as response. I would like to benchmark the the roundtrip time

Answer 1

You will need to measure the time in the client application for a roundtrip time, or monitor the network traffic going from, and coming to, the client to get the complete time interval. Measuring the time at the server will exclude any kernel level delays in the server and all the network transmission times.