Merge pull request #8800 from gudeh/gpl-less-inflation

gpl: reduce inflation parameters

Author: maliberty

src/gpl/README.md

@@ -133,8 +133,8 @@ 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 `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_inflation_ratio_coef` | Set inflation ratio coefficient for routability mode. The default value is `2`, 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 `3`, 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

@@ -174,8 +174,8 @@ class Replace
   float routabilityCheckOverflow_ = 0.3;
   float routabilityMaxDensity_ = 0.99;
   float routabilityTargetRcMetric_ = 1.01;
-  float routabilityInflationRatioCoef_ = 3;
-  float routabilityMaxInflationRatio_ = 6;
+  float routabilityInflationRatioCoef_ = 2;
+  float routabilityMaxInflationRatio_ = 3;
   int routabilityMaxInflationIter_ = 4;
 
   // routability RC metric coefficients

src/gpl/src/replace.cpp

@@ -81,8 +81,8 @@ void Replace::reset()
   routabilityCheckOverflow_ = 0.3;
   routabilityMaxDensity_ = 0.99;
   routabilityTargetRcMetric_ = 1.01;
-  routabilityInflationRatioCoef_ = 3;
-  routabilityMaxInflationRatio_ = 6;
+  routabilityInflationRatioCoef_ = 2;
+  routabilityMaxInflationRatio_ = 3;
   routabilityRcK1_ = routabilityRcK2_ = 1.0;
   routabilityRcK3_ = routabilityRcK4_ = 0.0;
   routabilityMaxInflationIter_ = 4;

src/gpl/src/routeBase.cpp

@@ -220,8 +220,8 @@ RouteBaseVars::RouteBaseVars()
 
 void RouteBaseVars::reset()
 {
-  inflationRatioCoef = 3;
-  maxInflationRatio = 6;
+  inflationRatioCoef = 2;
+  maxInflationRatio = 3;
   maxDensity = 0.90;
   targetRC = 1.01;
   ignoreEdgeRatio = 0.8;

test/jpeg_sky130hs.metrics

@@ -3,133 +3,142 @@
 	"IFP::instance_count": "49868",
 	"floorplan__design__io": 47,
 	"design__io__hpwl": 11749997,
-	"design__instance__displacement__total": 153809,
-	"design__instance__displacement__mean": 2.127,
-	"design__instance__displacement__max": 13.33,
-	"route__wirelength__estimated": 1.79471e+06,
-	"RSZ::repair_design_buffer_count": "449",
-	"RSZ::max_slew_slack": "20.238079130649567",
+	"design__instance__displacement__total": 154587,
+	"design__instance__displacement__mean": 2.138,
+	"design__instance__displacement__max": 13.799,
+	"route__wirelength__estimated": 1.7818e+06,
+	"RSZ::repair_design_buffer_count": "442",
+	"RSZ::max_slew_slack": "20.233282446861267",
 	"RSZ::max_fanout_slack": "100.0",
-	"RSZ::max_capacitance_slack": "21.275546385342473",
-	"design__instance__displacement__total": 6182.08,
-	"design__instance__displacement__mean": 0.084,
-	"design__instance__displacement__max": 11.499,
-	"route__wirelength__estimated": 1.85936e+06,
+	"RSZ::max_capacitance_slack": "20.70486189083569",
+	"design__instance__displacement__total": 6269.06,
+	"design__instance__displacement__mean": 0.085,
+	"design__instance__displacement__max": 11.97,
+	"route__wirelength__estimated": 1.84719e+06,
 	"design__instance__count__setup_buffer": 0,
-	"design__instance__count__hold_buffer": 24,
-	"RSZ::worst_slack_min": "0.003426148350891326",
-	"RSZ::worst_slack_max": "0.07033041015303426",
+	"design__instance__count__hold_buffer": 19,
+	"RSZ::worst_slack_min": "0.010567991225685143",
+	"RSZ::worst_slack_max": "0.10958168016494362",
 	"RSZ::tns_max": "0.0",
-	"RSZ::hold_buffer_count": "24",
-	"design__instance__displacement__total": 215.504,
+	"RSZ::hold_buffer_count": "19",
+	"design__instance__displacement__total": 206.812,
 	"design__instance__displacement__mean": 0.002,
-	"design__instance__displacement__max": 15.33,
-	"route__wirelength__estimated": 1.86323e+06,
+	"design__instance__displacement__max": 13.32,
+	"route__wirelength__estimated": 1.84996e+06,
 	"DPL::utilization": "29.4",
-	"DPL::design_area": "642493",
-	"route__net": 61558,
+	"DPL::design_area": "642202",
+	"route__net": 61552,
 	"route__net__special": 2,
-	"global_route__vias": 392497,
-	"global_route__wirelength": 3057472,
-	"grt__global_route__vias": 4245,
-	"grt__global_route__vias": 144,
-	"grt__antenna_diodes_count": 72,
+	"global_route__vias": 392578,
+	"global_route__wirelength": 3043116,
+	"grt__global_route__vias": 2467,
+	"grt__global_route__vias": 105,
+	"grt__antenna_diodes_count": 69,
 	"grt__antenna__violating__nets": 0,
 	"grt__antenna__violating__pins": 0,
 	"GRT::ANT::errors": "0",
-	"route__net": 61558,
+	"route__net": 61552,
 	"route__net__special": 2,
-	"route__drc_errors__iter:0": 6755,
-	"route__wirelength__iter:0": 2068090,
-	"route__drc_errors__iter:1": 740,
-	"route__wirelength__iter:1": 2058911,
-	"route__drc_errors__iter:2": 425,
-	"route__wirelength__iter:2": 2057988,
-	"route__drc_errors__iter:3": 4,
-	"route__wirelength__iter:3": 2057959,
+	"route__drc_errors__iter:0": 6639,
+	"route__wirelength__iter:0": 2056058,
+	"route__drc_errors__iter:1": 750,
+	"route__wirelength__iter:1": 2047322,
+	"route__drc_errors__iter:2": 380,
+	"route__wirelength__iter:2": 2046553,
+	"route__drc_errors__iter:3": 3,
+	"route__wirelength__iter:3": 2046445,
 	"route__drc_errors__iter:4": 0,
-	"route__wirelength__iter:4": 2057953,
+	"route__wirelength__iter:4": 2046442,
 	"route__drc_errors": 0,
-	"route__wirelength": 2057953,
-	"route__vias": 341684,
-	"route__vias__singlecut": 341684,
+	"route__wirelength": 2046442,
+	"route__vias": 341489,
+	"route__vias__singlecut": 341489,
 	"route__vias__multicut": 0,
 	"DRT::drv": "0",
-	"drt__repair_antennas__pre_repair__antenna__violating__nets": 79,
-	"drt__repair_antennas__pre_repair__antenna__violating__pins": 88,
-	"drt__repair_antennas__iter_0__global_route__vias": 2402,
-	"drt__repair_antennas__iter_0__antenna_diodes_count": 163,
-	"drt__repair_antennas__iter_0__route__drc_errors__iter:0": 735,
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-	"drt__repair_antennas__iter_0__route__wirelength__iter:1": 2058141,
-	"drt__repair_antennas__iter_0__route__drc_errors__iter:2": 185,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:2": 2058107,
+	"drt__repair_antennas__pre_repair__antenna__violating__nets": 73,
+	"drt__repair_antennas__pre_repair__antenna__violating__pins": 84,
+	"drt__repair_antennas__iter_0__global_route__vias": 2430,
+	"drt__repair_antennas__iter_0__antenna_diodes_count": 154,
+	"drt__repair_antennas__iter_0__route__drc_errors__iter:0": 752,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:0": 2046627,
+	"drt__repair_antennas__iter_0__route__drc_errors__iter:1": 229,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:1": 2046571,
+	"drt__repair_antennas__iter_0__route__drc_errors__iter:2": 160,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:2": 2046593,
 	"drt__repair_antennas__iter_0__route__drc_errors__iter:3": 2,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:3": 2058080,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:3": 2046545,
 	"drt__repair_antennas__iter_0__route__drc_errors__iter:4": 0,
-	"drt__repair_antennas__iter_0__route__wirelength__iter:4": 2058081,
+	"drt__repair_antennas__iter_0__route__wirelength__iter:4": 2046545,
 	"drt__repair_antennas__iter_0__route__drc_errors": 0,
-	"drt__repair_antennas__iter_0__route__wirelength": 2058081,
-	"drt__repair_antennas__iter_0__route__vias": 341738,
-	"drt__repair_antennas__iter_0__route__vias__singlecut": 341738,
+	"drt__repair_antennas__iter_0__route__wirelength": 2046545,
+	"drt__repair_antennas__iter_0__route__vias": 341491,
+	"drt__repair_antennas__iter_0__route__vias__singlecut": 341491,
 	"drt__repair_antennas__iter_0__route__vias__multicut": 0,
-	"drt__repair_antennas__iter_0__antenna__violating__nets": 10,
-	"drt__repair_antennas__iter_0__antenna__violating__pins": 16,
-	"drt__repair_antennas__iter_1__global_route__vias": 554,
-	"drt__repair_antennas__iter_1__antenna_diodes_count": 179,
-	"drt__repair_antennas__iter_1__route__drc_errors__iter:0": 65,
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-	"drt__repair_antennas__iter_1__route__drc_errors__iter:2": 15,
-	"drt__repair_antennas__iter_1__route__wirelength__iter:2": 2058118,
+	"drt__repair_antennas__iter_0__antenna__violating__nets": 15,
+	"drt__repair_antennas__iter_0__antenna__violating__pins": 21,
+	"drt__repair_antennas__iter_1__global_route__vias": 1360,
+	"drt__repair_antennas__iter_1__antenna_diodes_count": 175,
+	"drt__repair_antennas__iter_1__route__drc_errors__iter:0": 247,
+	"drt__repair_antennas__iter_1__route__wirelength__iter:0": 2046666,
+	"drt__repair_antennas__iter_1__route__drc_errors__iter:1": 45,
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+	"drt__repair_antennas__iter_1__route__drc_errors__iter:2": 33,
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 	"drt__repair_antennas__iter_1__route__drc_errors__iter:3": 0,
-	"drt__repair_antennas__iter_1__route__wirelength__iter:3": 2058130,
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-	"drt__repair_antennas__iter_1__route__vias__singlecut": 341760,
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-	"drt__repair_antennas__iter_2__route__vias__singlecut": 341772,
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-	"drt__repair_antennas__iter_2__antenna__violating__pins": 0,
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+	"drt__repair_antennas__iter_2__antenna__violating__pins": 1,
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+	"drt__repair_antennas__iter_3__route__vias": 341531,
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 	"drt__antenna__violating__nets": 0,
 	"drt__antenna__violating__pins": 0,
 	"DRT::ANT::errors": "0",
 	"design__violations": 0,
 	"timing__drv__floating__nets": 0,
 	"timing__drv__floating__pins": 0,
-	"DRT::worst_slack_min": "-0.02316935597847899",
-	"DRT::worst_slack_max": "0.031015191293097887",
-	"DRT::tns_max": "0.0",
-	"DRT::clock_skew": "0.4004066080920384",
-	"DRT::max_slew_slack": "-1.727895624935627",
+	"DRT::worst_slack_min": "-0.18688806586820164",
+	"DRT::worst_slack_max": "-0.04733902293043598",
+	"DRT::tns_max": "-0.09362200168998154",
+	"DRT::clock_skew": "0.4547141680782228",
+	"DRT::max_slew_slack": "-2.4015678092837334",
 	"DRT::max_fanout_slack": "100.0",
-	"DRT::max_capacitance_slack": "-1.790230699339063",
+	"DRT::max_capacitance_slack": "-3.281689231019909",
 	"DRT::clock_period": "6.387000",
-	"flow__warnings__count": 181,
+	"flow__warnings__count": 213,
 	"flow__errors__count": 0,
-	"flow__warnings__count:DRT-120": 150,
-	"flow__warnings__count:DRT-349": 20,
-	"flow__warnings__count:IFP-28": 1,
-	"flow__warnings__count:ORD-46": 9,
-	"flow__warnings__count:STA-441": 1,
+	"flow__warnings__count:DRT-0120": 182,
+	"flow__warnings__count:DRT-0349": 20,
+	"flow__warnings__count:IFP-0028": 1,
+	"flow__warnings__count:ORD-0046": 9,
+	"flow__warnings__count:STA-0441": 1,
 	"flow__warnings__type_count": 5
 }

test/jpeg_sky130hs.metrics_limits

@@ -1,23 +1,23 @@
 {
   "IFP::instance_count" : "59841.6"
- ,"DPL::design_area" : "770991.6"
+ ,"DPL::design_area" : "770642.4"
  ,"DPL::utilization" : "35.279999999999994"
- ,"RSZ::repair_design_buffer_count" : "538"
+ ,"RSZ::repair_design_buffer_count" : "530"
  ,"RSZ::max_slew_slack" : "0"
  ,"RSZ::max_capacitance_slack" : "0"
  ,"RSZ::max_fanout_slack" : "0"
- ,"RSZ::worst_slack_min" : "-0.6352738516491088"
- ,"RSZ::worst_slack_max" : "-0.5683695898469658"
+ ,"RSZ::worst_slack_min" : "-0.6281320087743149"
+ ,"RSZ::worst_slack_max" : "-0.5291183198350564"
  ,"RSZ::tns_max" : "-3185.0691600000005"
- ,"RSZ::hold_buffer_count" : "28"
+ ,"RSZ::hold_buffer_count" : "22"
  ,"GRT::ANT::errors" : "0"
  ,"DRT::drv" : "0"
- ,"DRT::worst_slack_min" : "-0.6618693559784791"
- ,"DRT::worst_slack_max" : "-0.6076848087069021"
- ,"DRT::tns_max" : "-3185.0691600000005"
- ,"DRT::clock_skew" : "0.480487929710446"
- ,"DRT::max_slew_slack" : "-2.0734747499227524"
- ,"DRT::max_capacitance_slack" : "-2.1482768392068756"
+ ,"DRT::worst_slack_min" : "-0.8255880658682017"
+ ,"DRT::worst_slack_max" : "-0.6860390229304361"
+ ,"DRT::tns_max" : "-3185.1627820016906"
+ ,"DRT::clock_skew" : "0.5456570016938673"
+ ,"DRT::max_slew_slack" : "-2.88188137114048"
+ ,"DRT::max_capacitance_slack" : "-3.938027077223891"
  ,"DRT::max_fanout_slack" : "0"
  ,"DRT::clock_period" : "6.387"
  ,"DRT::ANT::errors" : "0"