Merge pull request #3519 from The-OpenROAD-Project-staging/cts_remove_balance_levels

CTS: remove -balance_levels as it is now obsolete

Author: maliberty

flow/designs/gf12/ca53/config.mk

@@ -55,7 +55,7 @@ export MACRO_PLACE_HALO = 7 7
 export MACRO_WRAPPERS = $(DESIGN_DIR)/wrappers.tcl
 
 # Temporarily disable NDR for clock nets
-export CTS_ARGS = -sink_clustering_enable -balance_levels -repair_clock_nets -distance_between_buffers 100 -apply_ndr none
+export CTS_ARGS = -sink_clustering_enable -repair_clock_nets -distance_between_buffers 100 -apply_ndr none
 
 #export MAX_ROUTING_LAYER = H2 
 export FASTROUTE_TCL = $(DESIGN_DIR)/fastroute.tcl

flow/scripts/cts.tcl

@@ -16,7 +16,6 @@ proc save_progress { stage } {
 # Run CTS
 set cts_args [list \
   -sink_clustering_enable \
-  -balance_levels \
   -repair_clock_nets]
 
 append_env_var cts_args CTS_BUF_DISTANCE -distance_between_buffers 1