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global_route.tcl: carry -allow_congestion into the incremental reroutes #4563

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Merged
eder-matheus merged 3 commits into from
Sep 26, 2026
+17 −4
Merged

global_route.tcl: carry -allow_congestion into the incremental reroutes #4563

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fbed0e1
global_route.tcl: carry -allow_congestion into the incremental reroutes
oharboe Sep 25, 2026
4716171
global_route.tcl: pass -allow_congestion to repair_antennas
oharboe Sep 25, 2026
32a7b94
Merge origin/master
oharboe Sep 25, 2026
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21 changes: 17 additions & 4 deletions flow/scripts/global_route.tcl
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,15 @@ proc global_route_helper { } {
set use_cugr ""
append_env_var use_cugr GLOBAL_ROUTE_USE_CUGR -use_cugr 0

# The flow's choice to accept congestion, from GLOBAL_ROUTE_ARGS, passed
# to every incremental reroute and to repair_antennas: each call decides
# for itself, and one without -allow_congestion reroutes a congested route
# harder and then fails on it.
set allow_congestion ""
if { [lsearch -exact $::env(GLOBAL_ROUTE_ARGS) -allow_congestion] >= 0 } {
set allow_congestion -allow_congestion
}
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proc set_grt_seed { } {
set seed_arg [env_var_or_empty GRT_SEED]
if { $seed_arg ne "" } {
Expand Down Expand Up @@ -84,11 +93,12 @@ proc global_route_helper { } {

# Running DPL to fix overlapped instances
# Run to get modified net by DPL
log_cmd global_route -start_incremental
log_cmd global_route -start_incremental {*}$allow_congestion
detailed_placement_helper
# Route only the modified net by DPL
if {
![run_global_route_and_catch_failures -end_incremental {*}$res_aware \
{*}$allow_congestion \
-congestion_report_file $::env(REPORTS_DIR)/congestion_post_repair_design.rpt]
} {
return
Expand All @@ -104,12 +114,13 @@ proc global_route_helper { } {
report_metrics 5 "global route post repair timing"
}

log_cmd global_route -start_incremental
log_cmd global_route -start_incremental {*}$allow_congestion
detailed_placement_helper
log_cmd check_placement -verbose
# Route only the modified net by DPL
if {
![run_global_route_and_catch_failures -end_incremental {*}$res_aware \
{*}$allow_congestion \
-congestion_report_file $::env(REPORTS_DIR)/congestion_post_repair_timing.rpt]
} {
return
Expand All @@ -135,11 +146,12 @@ proc global_route_helper { } {
}

if { !$::env(OPT_POST_GRT_WNS) } {
log_cmd global_route -start_incremental
log_cmd global_route -start_incremental {*}$allow_congestion
recover_power_helper
# Route the modified nets by rsz journal restore
if {
![run_global_route_and_catch_failures -end_incremental {*}$res_aware \
{*}$allow_congestion \
-congestion_report_file $::env(REPORTS_DIR)/congestion_post_recover_power.rpt]
} {
return
Expand All @@ -151,7 +163,8 @@ proc global_route_helper { } {
[env_var_exists_and_non_empty MAX_REPAIR_ANTENNAS_ITER_GRT]
} {
puts "Repair antennas..."
repair_antennas -iterations $::env(MAX_REPAIR_ANTENNAS_ITER_GRT)
repair_antennas -iterations $::env(MAX_REPAIR_ANTENNAS_ITER_GRT) \
{*}$allow_congestion
# repair antennas calls DPL internally
check_placement -verbose
check_antennas -report_file $::env(REPORTS_DIR)/grt_antennas.log
Expand Down
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