Open the Config File editor, an select the C/RTL Co-Simulation category on the left side. The options for Co-simulation are displayed on the right.
enable_dataflow_profilingto turn on the feature.
enable_fifo_sizingto turn on this feature.
Select Run under C/RTL Co-Simulation in the Flow Navigator.
The DATAFLOW optimization is a dynamic optimization that can only really be understood after C/RTL co-simulation which provides needed performance data. After co-simulation the columns of the Process table are populated with values from the simulation results.