Abstract: Various methods, apparatuses, and media for diagnosing a system performance problem are provided. The methodology includes operations of establishing a communication link between a client device and a server device; measuring a data rate of the communication link; collecting data relating to each of the client device and the server device; using the measured data rate and the collected data to determine a source of a delay on the communication link; and diagnosing the system performance problem based on the determined source of the delay. Performance metrics may be determined from the collected data, and then correlated together in order to diagnose the problem.