1This device just connects to a phy and prints the time as it passes
2(for example if you want to monitor the progress of long simulations)
3
4How often the speed is measured and printed out is configured with
5the command line option `-interval=<interval>`
6where `interval` is a value in microseconds.
7Note that monitoring adds overhead to the simulation, therefore do not set too
8small values (i.e. not smaller than 50ms)
9