The Interconnect Congestion Level metric highlights the largest contiguous area in which routing resources are overused. By default, this metric is based on estimation, which is similar to the congestion level after initial routing. Actual routing can also be displayed if routing exists. After placement or after routing, you can display this congestion metric by right-clicking in the Device window and selecting .
The Interconnect Congestion Level metric provides a quick visual overview of any congestion hotspots in the device. The following figure shows a placed design with several congested areas. This metric is based on the current interconnect demand and availability with a threshold of 0.9 (that is, 90% routing usage). The range is 0.1 to 0.9.
You can visualize congestion based on:
- Direction: North, South, East, West, Vertical, Horizontal
- Type: Short, Long, Global
- Style: Estimated, Routed, Mixed