global route: default iterations 40

designs not passing at 20:

microwatt sky130hd

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/scripts/global_route.tcl

@@ -18,7 +18,7 @@ if {[info exist env(FASTROUTE_TCL)]} {
 
 global_route -guide_file $env(RESULTS_DIR)/route.guide \
                -congestion_report_file $env(REPORTS_DIR)/congestion.rpt \
-               {*}[expr {[info exists ::env(GLOBAL_ROUTE_ARGS)] ? $::env(GLOBAL_ROUTE_ARGS) : {-congestion_iterations 20 -verbose}}]
+               {*}[expr {[info exists ::env(GLOBAL_ROUTE_ARGS)] ? $::env(GLOBAL_ROUTE_ARGS) : {-congestion_iterations 40 -verbose}}]
 
 set_propagated_clock [all_clocks]
 estimate_parasitics -global_routing