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NickFritzsche's avatar
NickFritzsche
Icon for New Contributor rankNew Contributor
11 months ago

Diagnosing Congestions

Hello, our Arria 10 design suffers from routing congestions. We used the "Top Congested Nets" report to identify critical nets and reworked the design, e.g. by manual register replication, pipelini...
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RichardT_altera's avatar
RichardT_altera
Icon for Super Contributor rankSuper Contributor
10 months ago

Your design is having routing congestion on both short and long wire.

Short Wire:

You might need to reduce the number of wire in your RTL design, starting with the highest Total Grid Length shown on the Global Router Wire Utilization Map. To view the RTL design files, right-click the nodes in the Global Router Wire Utilization Map > Locate nodes > Locate in Design Files. Then you can check which wire that can reduced, based on your design need.

Long Wire:

Additionally, you may consider running the Fitter again with the Optimize hold timing option (Settings Menu) turned off.
This will disable optimization of problematic paths and expose them for further analysis using the Timing Analyzer.

Regards,

Richard Tan