Two metrics are applicable if there are Pblocks. They do not depend on placement:
- LUT Utilization per Pblock: Color codes the Pblock based on an estimate of how the LUTs will be placed into the slices contained in the Pblock.
- FF Utilization per Pblock: Color codes the Pblock based on an estimate of how the FFs will be packed into the slices contained in the Pblock.
More than one rule can be used at a time as shown in the previous figure. Both LUT Utilization per CLB and FF Utilization per CLB are on.
Tip: If there are sections of the design with high utilization or high estimates of routing congestion, consider tweaking the RTL or placement constraints to reduce logic and routing utilization in that area.