TMC-20713: Paths Failing Recovery Analysis with Locally Routed Clock


Violation of this rule identifies recovery failing paths that use local routing resources in their clock path. As compared to local routing resources global resources have much less min max spread and consquently reduce the amount of clock skew.


Name Description Type Default Value Min Value Max Value
maximum_recovery_slack A violation is reported for timing paths that have a recovery slack below the value of this parameter. double 0.0    


If there are no more global resources available and the number of clocks cannot be reduced, the number of fan-outs should be reduced to prevent having to route as far which will decrease the skew present. Otherwise the associated node on the clock path should be promoted to global routing using the QSF "set_instance_assignment -name GLOBAL_SIGNAL GLOBAL_CLOCK -to <instance_name>".



Device Family

  • Intel® Stratix® 10
  • Intel® Agilex™
  • Intel® Arria® 10
  • Intel® Cyclone® 10 GX