The ok.log file is generated when after the ok command is given. It is used is useful to display some error and warning information addition to some compile time constants that can help when debugging. Amongst other logged parameters, the ok.log contains information relating to:
1) the number of total I/O at the top level and how many pins have assigned pinout locations
2) the data_width of fifos and shifters and the control_width of shared registers within the framework module
3) the number of enabled and disabled application modules
4) the total number of resource indexes that have been utilized