RTXI can be run in non-real-time to debug your code. This will require that you manually configure and recompile RTXI. In the RTXI directory, go to the scripts directory and run:

$ sudo ./install_rtxi.sh

You will be prompted to enter your system configuration. type “posix” to run in non-real-time (POSIX).

Running RTXI in non-real-time is useful for debugging purposes mainly, and it also allows the application to be installed without having to install a real-time kernel beforehand.