3 Print the monitor's options and the available reactors list.
5 **-r**, **--reactor** *reactor*
7 Enables the *reactor*. See **-h** for a list of available reactors.
11 When tracing (**-t**), also print the events that happened during the **rv**
12 command itself. If the **rv** command itself generates too many events,
13 the tool might get busy processing its own events only.
17 Trace monitor's events and error.