set_critical criticality_number hier_net_name
[,hier_net_name …];
criticality_number
Sets the criticality level from 1 to 5, with 1 being the least critical and 5 being the most critical. The default is 1. Criticality numbers are used in timing-driven place and route.
hier_net_name
Specifies the full hierarchical name of the net(s).
None
set_critical 5 /u1/u2/net1;
set_critical 2 /u1/u2/net5, u1/u2/net3;