Path Groups

PT organizes paths in the design into groups. This path grouping affects the generation of timing analysis reports.

for example, by default the report_timing cmd reports the single path with the worst slack from each path group.

PT implicitly creates a path group each time you use the create_clock cmd to create a new clock.
The name of the path group is the same as the clock name.
PT assigns a path to the path group if the endpoint of the path is a flip-flop clocked by the clock.