How do I identify congestion hot spots in a design?

To find congestion hot spots in a design, it is important to identify the nets passing through congested regions of a design so that corrective action can be taken. You can:

Find nets passing through gcells.
Visualize selected nets as global paths in the heat map.

To find and display the nets that are passing through a gcell:

Run congestion analysis by clicking the Congestion Analysis icon on the toolbar.
Select a gcell in the Global Cell Track Utilization table.
Select a net from the table of nets displayed below the Global Cell Track Utilization table.
All the gcells that the selected net passes through are highlighted. The path displayed by the highlighted gcells is referred to as the global path. The global path of the selected gcells is seen on the heat map.
Use the Zoom selected Global Cells icon on the Congestion Analysis assistant toolbar to closely view the path of the selected gcell.
Select a range of nets from the Net Selection table by clicking the start and end nets and keeping the Shift key pressed. You can also select multiple nets from the table by clicking multiple nets and keeping the Ctrl key pressed.
Click the Show Selected Global Nets Edges option from the Filter drop-down list to show the congestion on gcells associated with the global paths of the selected nets.

How do I identify congestion hot spots in a design?

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