Merge pull request #6590 from The-OpenROAD-Project-staging/grt-rudy-t…

…weak

grt:  tweak rudy wire width and routability inflation

src/gpl/README.md

@@ -131,8 +131,8 @@ global_placement
 | `-routability_check_overflow` | Set overflow threshold for routability mode. The default value is `0.3`, and the allowed values are floats `[0, 1]`. |
 | `-routability_max_density` | Set density threshold for routability mode. The default value is `0.99`, and the allowed values are floats `[0, 1]`. |
 | `-routability_max_inflation_iter` | Set inflation iteration threshold for routability mode. The default value is `4`, and the allowed values are integers `[1, MAX_INT]`. |
-| `-routability_inflation_ratio_coef` | Set inflation ratio coefficient for routability mode. The default value is `5`, and the allowed values are floats. |
-| `-routability_max_inflation_ratio` | Set inflation ratio threshold for routability mode to prevent overly aggressive adjustments. The default value is `8`, and the allowed values are floats. |
+| `-routability_inflation_ratio_coef` | Set inflation ratio coefficient for routability mode. The default value is `3`, and the allowed values are floats. |
+| `-routability_max_inflation_ratio` | Set inflation ratio threshold for routability mode to prevent overly aggressive adjustments. The default value is `6`, and the allowed values are floats. |
 | `-routability_rc_coefficients` | Set routability RC coefficients for calculating the final RC. They relate to the 0.5%, 1%, 2%, and 5% most congested tiles. It comes in the form of a Tcl List `{k1, k2, k3, k4}`. The default value for each coefficient is `{1.0, 1.0, 0.0, 0.0}` respectively, and the allowed values are floats. |
 
 #### Timing-Driven Arguments

src/gpl/include/gpl/Replace.h

@@ -183,8 +183,8 @@ class Replace
   float routabilityCheckOverflow_ = 0.3;
   float routabilityMaxDensity_ = 0.99;
   float routabilityTargetRcMetric_ = 1.01;
-  float routabilityInflationRatioCoef_ = 5;
-  float routabilityMaxInflationRatio_ = 8;
+  float routabilityInflationRatioCoef_ = 3;
+  float routabilityMaxInflationRatio_ = 6;
 
   // routability RC metric coefficients
   float routabilityRcK1_ = 1.0;

src/gpl/src/replace.cpp

@@ -106,8 +106,8 @@ void Replace::reset()
   routabilityCheckOverflow_ = 0.3;
   routabilityMaxDensity_ = 0.99;
   routabilityTargetRcMetric_ = 1.01;
-  routabilityInflationRatioCoef_ = 5;
-  routabilityMaxInflationRatio_ = 8;
+  routabilityInflationRatioCoef_ = 3;
+  routabilityMaxInflationRatio_ = 6;
   routabilityRcK1_ = routabilityRcK2_ = 1.0;
   routabilityRcK3_ = routabilityRcK4_ = 0.0;
   routabilityMaxInflationIter_ = 4;

src/gpl/src/routeBase.cpp

@@ -243,8 +243,8 @@ RouteBaseVars::RouteBaseVars()
 
 void RouteBaseVars::reset()
 {
-  inflationRatioCoef = 5;
-  maxInflationRatio = 8;
+  inflationRatioCoef = 3;
+  maxInflationRatio = 6;
   maxDensity = 0.90;
   targetRC = 1.01;
   ignoreEdgeRatio = 0.8;

src/gpl/test/simple03-rd.ok

@@ -72,11 +72,11 @@
 [INFO GPL-0040] NumTiles: 196
 [INFO GPL-0081] TotalRouteOverflow: 0.0000
 [INFO GPL-0082] OverflowTileCnt: 0
-[INFO GPL-0083] 0.5%RC: 0.4881
-[INFO GPL-0084] 1.0%RC: 0.4751
-[INFO GPL-0085] 2.0%RC: 0.4543
-[INFO GPL-0086] 5.0%RC: 0.4248
-[INFO GPL-0087] FinalRC: 0.4816316
+[INFO GPL-0083] 0.5%RC: 0.5573
+[INFO GPL-0084] 1.0%RC: 0.5410
+[INFO GPL-0085] 2.0%RC: 0.5147
+[INFO GPL-0086] 5.0%RC: 0.4776
+[INFO GPL-0087] FinalRC: 0.54914284
 [INFO GPL-0077] FinalRC lower than targetRC(1.2500), routability not needed.
 [NesterovSolve] Iter:  290 overflow: 0.267 HPWL: 4778698
 [NesterovSolve] Iter:  300 overflow: 0.233 HPWL: 4810713

src/gpl/test/simple04-rd.ok

@@ -72,11 +72,11 @@
 [INFO GPL-0040] NumTiles: 196
 [INFO GPL-0081] TotalRouteOverflow: 0.0000
 [INFO GPL-0082] OverflowTileCnt: 0
-[INFO GPL-0083] 0.5%RC: 0.4881
-[INFO GPL-0084] 1.0%RC: 0.4751
-[INFO GPL-0085] 2.0%RC: 0.4543
-[INFO GPL-0086] 5.0%RC: 0.4248
-[INFO GPL-0087] FinalRC: 0.4816316
+[INFO GPL-0083] 0.5%RC: 0.5573
+[INFO GPL-0084] 1.0%RC: 0.5410
+[INFO GPL-0085] 2.0%RC: 0.5147
+[INFO GPL-0086] 5.0%RC: 0.4776
+[INFO GPL-0087] FinalRC: 0.54914284
 [INFO GPL-0077] FinalRC lower than targetRC(0.6700), routability not needed.
 [NesterovSolve] Iter:  290 overflow: 0.267 HPWL: 4778698
 [NesterovSolve] Iter:  300 overflow: 0.233 HPWL: 4810713

src/grt/src/Rudy.cpp

@@ -69,7 +69,7 @@ Rudy::Rudy(odb::dbBlock* block, grt::GlobalRouter* grouter)
     }
     pitch_terms += 1.0 / pitch;
   }
-  wire_width_ = 1 / pitch_terms;  // = harm. mean / num_routing_layers
+  wire_width_ = (1 / pitch_terms) * 1.25;  // = harm. mean / num_routing_layers
 
   int x_grids, y_grids;
   grouter_->getGridSize(x_grids, y_grids);

test/aes_sky130hd.metrics

@@ -2,137 +2,151 @@
 	"IFP::ord_version": "",
 	"IFP::instance_count": "17210",
 	"floorplan__design__io": 388,
-	"design__io__hpwl": 249423089,
-	"design__instance__displacement__total": 32112.1,
-	"design__instance__displacement__mean": 0.58,
-	"design__instance__displacement__max": 14.227,
-	"route__wirelength__estimated": 1.17631e+06,
-	"RSZ::repair_design_buffer_count": "268",
-	"RSZ::max_slew_slack": "20.665639638900757",
+	"design__io__hpwl": 233723326,
+	"design__instance__displacement__total": 31231,
+	"design__instance__displacement__mean": 0.563,
+	"design__instance__displacement__max": 12.754,
+	"route__wirelength__estimated": 1.30195e+06,
+	"RSZ::repair_design_buffer_count": "335",
+	"RSZ::max_slew_slack": "20.026493072509766",
 	"RSZ::max_fanout_slack": "100.0",
-	"RSZ::max_capacitance_slack": "79.66105995794969",
-	"design__instance__displacement__total": 475.89,
-	"design__instance__displacement__mean": 0.008,
-	"design__instance__displacement__max": 8.745,
-	"route__wirelength__estimated": 1.19075e+06,
-	"design__instance__count__setup_buffer": 2487,
-	"design__instance__count__hold_buffer": 408,
-	"RSZ::worst_slack_min": "0.001786126852532069",
-	"RSZ::worst_slack_max": "-0.6477543129667724",
-	"RSZ::tns_max": "-30.956983630538193",
-	"RSZ::hold_buffer_count": "408",
-	"design__instance__displacement__total": 17663.6,
-	"design__instance__displacement__mean": 0.302,
-	"design__instance__displacement__max": 21.967,
-	"route__wirelength__estimated": 1.42489e+06,
-	"DPL::utilization": "6.3",
-	"DPL::design_area": "188827",
-	"route__net": 18252,
+	"RSZ::max_capacitance_slack": "80.42302298974559",
+	"design__instance__displacement__total": 509.21,
+	"design__instance__displacement__mean": 0.009,
+	"design__instance__displacement__max": 9.292,
+	"route__wirelength__estimated": 1.31811e+06,
+	"design__instance__count__setup_buffer": 2074,
+	"design__instance__count__hold_buffer": 488,
+	"RSZ::worst_slack_min": "-0.6782311571000041",
+	"RSZ::worst_slack_max": "-0.9489156395900656",
+	"RSZ::tns_max": "-83.7008281930931",
+	"RSZ::hold_buffer_count": "488",
+	"design__instance__displacement__total": 13829.2,
+	"design__instance__displacement__mean": 0.237,
+	"design__instance__displacement__max": 20.588,
+	"route__wirelength__estimated": 1.50817e+06,
+	"DPL::utilization": "6.2",
+	"DPL::design_area": "188606",
+	"route__net": 17995,
 	"route__net__special": 2,
-	"grt__antenna_diodes_count": 1367,
-	"grt__antenna__violating__nets": 0,
-	"grt__antenna__violating__pins": 0,
-	"GRT::ANT::errors": "0",
-	"route__net": 18252,
+	"grt__antenna_diodes_count": 1209,
+	"grt__antenna__violating__nets": 1,
+	"grt__antenna__violating__pins": 1,
+	"GRT::ANT::errors": "1",
+	"route__net": 17995,
 	"route__net__special": 2,
-	"route__drc_errors__iter:0": 7299,
-	"route__wirelength__iter:0": 1758957,
-	"route__drc_errors__iter:1": 2567,
-	"route__wirelength__iter:1": 1749227,
-	"route__drc_errors__iter:2": 1812,
-	"route__wirelength__iter:2": 1746590,
-	"route__drc_errors__iter:3": 57,
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-	"route__drc_errors__iter:4": 10,
-	"route__wirelength__iter:4": 1746718,
-	"route__drc_errors__iter:5": 0,
-	"route__wirelength__iter:5": 1746714,
+	"route__drc_errors__iter:0": 6489,
+	"route__wirelength__iter:0": 1854403,
+	"route__drc_errors__iter:1": 2172,
+	"route__wirelength__iter:1": 1846240,
+	"route__drc_errors__iter:2": 1856,
+	"route__wirelength__iter:2": 1843914,
+	"route__drc_errors__iter:3": 58,
+	"route__wirelength__iter:3": 1843870,
+	"route__drc_errors__iter:4": 17,
+	"route__wirelength__iter:4": 1843840,
+	"route__drc_errors__iter:5": 15,
+	"route__wirelength__iter:5": 1843842,
+	"route__drc_errors__iter:6": 7,
+	"route__wirelength__iter:6": 1843847,
+	"route__drc_errors__iter:7": 0,
+	"route__wirelength__iter:7": 1843848,
 	"route__drc_errors": 0,
-	"route__wirelength": 1746714,
-	"route__vias": 171397,
-	"route__vias__singlecut": 171397,
+	"route__wirelength": 1843848,
+	"route__vias": 167532,
+	"route__vias__singlecut": 167532,
 	"route__vias__multicut": 0,
 	"DRT::drv": "0",
-	"drt__repair_antennas__pre_repair__antenna__violating__nets": 88,
-	"drt__repair_antennas__pre_repair__antenna__violating__pins": 88,
-	"drt__repair_antennas__iter_0__antenna_diodes_count": 1599,
-	"drt__repair_antennas__iter_0__route__drc_errors__iter:0": 638,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:0": 1746073,
-	"drt__repair_antennas__iter_0__route__drc_errors__iter:1": 158,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:1": 1745980,
-	"drt__repair_antennas__iter_0__route__drc_errors__iter:2": 147,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:2": 1745970,
+	"drt__repair_antennas__pre_repair__antenna__violating__nets": 104,
+	"drt__repair_antennas__pre_repair__antenna__violating__pins": 105,
+	"drt__repair_antennas__iter_0__antenna_diodes_count": 1525,
+	"drt__repair_antennas__iter_0__route__drc_errors__iter:0": 916,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:0": 1844283,
+	"drt__repair_antennas__iter_0__route__drc_errors__iter:1": 312,
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+	"drt__repair_antennas__iter_0__route__drc_errors__iter:2": 289,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:2": 1844081,
 	"drt__repair_antennas__iter_0__route__drc_errors__iter:3": 0,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:3": 1745976,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:3": 1844030,
 	"drt__repair_antennas__iter_0__route__drc_errors": 0,
-	"drt__repair_antennas__iter_0__route__wirelength": 1745976,
-	"drt__repair_antennas__iter_0__route__vias": 171755,
-	"drt__repair_antennas__iter_0__route__vias__singlecut": 171755,
+	"drt__repair_antennas__iter_0__route__wirelength": 1844030,
+	"drt__repair_antennas__iter_0__route__vias": 168195,
+	"drt__repair_antennas__iter_0__route__vias__singlecut": 168195,
 	"drt__repair_antennas__iter_0__route__vias__multicut": 0,
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-	"drt__repair_antennas__iter_1__antenna_diodes_count": 1613,
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+	"drt__repair_antennas__iter_0__antenna__violating__nets": 12,
+	"drt__repair_antennas__iter_0__antenna__violating__pins": 12,
+	"drt__repair_antennas__iter_1__antenna_diodes_count": 1578,
+	"drt__repair_antennas__iter_1__route__drc_errors__iter:0": 88,
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+	"drt__repair_antennas__iter_1__route__drc_errors__iter:2": 27,
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+	"drt__repair_antennas__iter_1__route__drc_errors__iter:3": 0,
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 	"drt__repair_antennas__iter_1__route__drc_errors": 0,
-	"drt__repair_antennas__iter_1__route__wirelength": 1746011,
-	"drt__repair_antennas__iter_1__route__vias": 171781,
-	"drt__repair_antennas__iter_1__route__vias__singlecut": 171781,
+	"drt__repair_antennas__iter_1__route__wirelength": 1844295,
+	"drt__repair_antennas__iter_1__route__vias": 168296,
+	"drt__repair_antennas__iter_1__route__vias__singlecut": 168296,
 	"drt__repair_antennas__iter_1__route__vias__multicut": 0,
-	"drt__repair_antennas__iter_1__antenna__violating__nets": 3,
-	"drt__repair_antennas__iter_1__antenna__violating__pins": 3,
-	"drt__repair_antennas__iter_2__antenna_diodes_count": 1630,
-	"drt__repair_antennas__iter_2__route__drc_errors__iter:0": 13,
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+	"drt__repair_antennas__iter_1__antenna__violating__nets": 4,
+	"drt__repair_antennas__iter_1__antenna__violating__pins": 4,
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-	"drt__repair_antennas__iter_2__route__vias": 171811,
-	"drt__repair_antennas__iter_2__route__vias__singlecut": 171811,
+	"drt__repair_antennas__iter_2__route__wirelength": 1844142,
+	"drt__repair_antennas__iter_2__route__vias": 168297,
+	"drt__repair_antennas__iter_2__route__vias__singlecut": 168297,
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-	"drt__repair_antennas__iter_3__route__drc_errors__iter:0": 0,
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+	"drt__repair_antennas__iter_2__antenna__violating__nets": 4,
+	"drt__repair_antennas__iter_2__antenna__violating__pins": 4,
+	"drt__repair_antennas__iter_3__antenna_diodes_count": 1588,
+	"drt__repair_antennas__iter_3__route__drc_errors__iter:0": 21,
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+	"drt__repair_antennas__iter_3__route__drc_errors__iter:3": 0,
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-	"drt__repair_antennas__iter_3__route__vias": 171816,
-	"drt__repair_antennas__iter_3__route__vias__singlecut": 171816,
+	"drt__repair_antennas__iter_3__route__wirelength": 1844142,
+	"drt__repair_antennas__iter_3__route__vias": 168325,
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-	"drt__repair_antennas__iter_4__route__drc_errors__iter:0": 0,
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+	"drt__repair_antennas__iter_3__antenna__violating__nets": 2,
+	"drt__repair_antennas__iter_3__antenna__violating__pins": 2,
+	"drt__repair_antennas__iter_4__antenna_diodes_count": 1591,
+	"drt__repair_antennas__iter_4__route__drc_errors__iter:0": 4,
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 	"drt__repair_antennas__iter_4__route__drc_errors": 0,
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-	"drt__repair_antennas__iter_4__route__vias": 171826,
-	"drt__repair_antennas__iter_4__route__vias__singlecut": 171826,
+	"drt__repair_antennas__iter_4__route__wirelength": 1844158,
+	"drt__repair_antennas__iter_4__route__vias": 168327,
+	"drt__repair_antennas__iter_4__route__vias__singlecut": 168327,
 	"drt__repair_antennas__iter_4__route__vias__multicut": 0,
-	"drt__repair_antennas__iter_4__antenna__violating__nets": 1,
-	"drt__repair_antennas__iter_4__antenna__violating__pins": 1,
-	"drt__antenna__violating__nets": 1,
-	"drt__antenna__violating__pins": 1,
-	"DRT::ANT::errors": "1",
+	"drt__repair_antennas__iter_4__antenna__violating__nets": 2,
+	"drt__repair_antennas__iter_4__antenna__violating__pins": 2,
+	"drt__antenna__violating__nets": 2,
+	"drt__antenna__violating__pins": 2,
+	"DRT::ANT::errors": "2",
 	"design__violations": 0,
 	"timing__drv__floating__nets": 0,
 	"timing__drv__floating__pins": 0,
-	"DRT::worst_slack_min": "-0.26297542665594487",
-	"DRT::worst_slack_max": "-1.3151449190808375",
-	"DRT::tns_max": "-107.30242953442018",
-	"DRT::clock_skew": "0.8852572259145157",
-	"DRT::max_slew_slack": "5.047664734871684",
+	"DRT::worst_slack_min": "-0.7343703630840176",
+	"DRT::worst_slack_max": "-1.4811148282612607",
+	"DRT::tns_max": "-163.21185576115283",
+	"DRT::clock_skew": "0.6194901433841975",
+	"DRT::max_slew_slack": "3.438989818096161",
 	"DRT::max_fanout_slack": "100.0",
-	"DRT::max_capacitance_slack": "4.7474747985438785",
+	"DRT::max_capacitance_slack": "0.7705570319050725",
 	"DRT::clock_period": "3.740000",
-	"flow__warnings__count": 32,
+	"flow__warnings__count": 33,
 	"flow__errors__count": 0
 }

test/aes_sky130hd.metrics_limits

@@ -1,24 +1,24 @@
 {
   "IFP::instance_count" : "20652.0"
- ,"DPL::design_area" : "226592.4"
- ,"DPL::utilization" : "7.56"
- ,"RSZ::repair_design_buffer_count" : "321"
+ ,"DPL::design_area" : "226327.19999999998"
+ ,"DPL::utilization" : "7.4399999999999995"
+ ,"RSZ::repair_design_buffer_count" : "402"
  ,"RSZ::max_slew_slack" : "0"
  ,"RSZ::max_capacitance_slack" : "0"
  ,"RSZ::max_fanout_slack" : "0"
- ,"RSZ::worst_slack_min" : "-0.372213873147468"
- ,"RSZ::worst_slack_max" : "-1.0217543129667725"
- ,"RSZ::tns_max" : "-674.6109836305383"
- ,"RSZ::hold_buffer_count" : "489"
- ,"GRT::ANT::errors" : "0"
+ ,"RSZ::worst_slack_min" : "-1.0522311571000043"
+ ,"RSZ::worst_slack_max" : "-1.3229156395900656"
+ ,"RSZ::tns_max" : "-727.3548281930932"
+ ,"RSZ::hold_buffer_count" : "585"
+ ,"GRT::ANT::errors" : "1"
  ,"DRT::drv" : "0"
- ,"DRT::worst_slack_min" : "-0.6369754266559449"
- ,"DRT::worst_slack_max" : "-1.6891449190808376"
- ,"DRT::tns_max" : "-750.9564295344203"
- ,"DRT::clock_skew" : "1.0623086710974188"
+ ,"DRT::worst_slack_min" : "-1.1083703630840176"
+ ,"DRT::worst_slack_max" : "-1.8551148282612608"
+ ,"DRT::tns_max" : "-806.865855761153"
+ ,"DRT::clock_skew" : "0.743388172061037"
  ,"DRT::max_slew_slack" : "0"
  ,"DRT::max_capacitance_slack" : "0"
  ,"DRT::max_fanout_slack" : "0"
  ,"DRT::clock_period" : "3.74"
- ,"DRT::ANT::errors" : "1"
+ ,"DRT::ANT::errors" : "2"
 }