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[DeviceResourcesWriter] Output resource timings for US+ #1001

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[DeviceResourcesWriter] Output resource timings for US+ #1001

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2ecd863
Add US+ testing
eddieh-xlnx May 29, 2024
6c8ebcc
[DeviceResourcesWriter] Populate PIP timings (slow corner, typical)
eddieh-xlnx May 29, 2024
aeacb85
[DelayEstimatorBase] Refactor calcNodeGroupDelay()
eddieh-xlnx May 30, 2024
97a3a48
Populate PIP timings into slow.max, node discontinuity delay into nod…
eddieh-xlnx May 30, 2024
d81e806
Cleanup/rename use T = R * C
eddieh-xlnx May 30, 2024
44444c4
[TimingAndWirelengthReport] Do not mask UTurn nodes
eddieh-xlnx May 31, 2024
8dc8288
[DeviceResourcesWriter] Populate SitePIP and intra-Cell delays
eddieh-xlnx Jun 3, 2024
fd7d50c
Add assertion
eddieh-xlnx Jun 3, 2024
bd0d34e
[DeviceResourcesWriter] Delays for thru-site pips (SLICEL only)
eddieh-xlnx Jun 3, 2024
3acd160
Update copyright
eddieh-xlnx Jun 3, 2024
6a15ad1
Revert making DelayModelBuilder public
eddieh-xlnx Jun 3, 2024
9b89d37
Cleanup
eddieh-xlnx Jun 12, 2024
7504ad5
Fix some broken tests
eddieh-xlnx Jun 12, 2024
ea32d86
Another fix
eddieh-xlnx Jun 12, 2024
bf878ca
Revert test/ changes
eddieh-xlnx Jun 13, 2024
c578e41
Fix test
eddieh-xlnx Jun 13, 2024
ad8d152
Add testUltraScalePlusTiming()
eddieh-xlnx Jun 13, 2024
8222132
Address review comments
eddieh-xlnx Jun 13, 2024
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167 changes: 138 additions & 29 deletions src/com/xilinx/rapidwright/interchange/DeviceResourcesWriter.java
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
/*
* Copyright (c) 2020-2022, Xilinx, Inc.
* Copyright (c) 2022-2023, Advanced Micro Devices, Inc.
* Copyright (c) 2022-2024, Advanced Micro Devices, Inc.
* All rights reserved.
*
* Author: Chris Lavin, Xilinx Research Labs.
Expand All @@ -23,30 +23,6 @@

package com.xilinx.rapidwright.interchange;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.Set;
import java.util.TreeSet;

import org.capnproto.MessageBuilder;
import org.capnproto.PrimitiveList;
import org.capnproto.PrimitiveList.Int;
import org.capnproto.StructList;
import org.capnproto.Text;
import org.capnproto.TextList;
import org.capnproto.Void;

import com.xilinx.rapidwright.design.Design;
import com.xilinx.rapidwright.design.DesignTools;
import com.xilinx.rapidwright.design.SiteInst;
Expand Down Expand Up @@ -99,8 +75,37 @@
import com.xilinx.rapidwright.interchange.LogicalNetlist.Netlist;
import com.xilinx.rapidwright.interchange.LogicalNetlist.Netlist.Direction;
import com.xilinx.rapidwright.interchange.LogicalNetlist.Netlist.PropertyMap;
import com.xilinx.rapidwright.rwroute.RouterHelper;
import com.xilinx.rapidwright.tests.CodePerfTracker;
import com.xilinx.rapidwright.timing.DelayModel;
import com.xilinx.rapidwright.timing.TimingModel;
import com.xilinx.rapidwright.timing.delayestimator.DelayEstimatorBase;
import com.xilinx.rapidwright.timing.delayestimator.InterconnectInfo;
import com.xilinx.rapidwright.util.Pair;
import com.xilinx.rapidwright.util.Utils;
import org.capnproto.MessageBuilder;
import org.capnproto.PrimitiveList;
import org.capnproto.PrimitiveList.Int;
import org.capnproto.StructList;
import org.capnproto.Text;
import org.capnproto.TextList;
import org.capnproto.Void;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.Set;
import java.util.TreeSet;

public class DeviceResourcesWriter {
private static StringEnumerator allStrings;
Expand All @@ -109,6 +114,11 @@ public class DeviceResourcesWriter {
private static HashMap<TileTypeEnum,Tile> tileTypes;
private static HashMap<SiteTypeEnum,Site> siteTypes;

private static DelayEstimatorBase delayEstimator;
private static DelayModel intrasiteAndLogicDelayModel;

private static final float PICSECONDS_TO_SECONDS = 1e-12f;
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PICOSECONDS


public static void populateSiteEnumerations(SiteInst siteInst, Site site) {
if (!siteTypes.containsKey(siteInst.getSiteTypeEnum())) {
if (site.getSiteTypeEnum() != siteInst.getSiteTypeEnum()) {
Expand Down Expand Up @@ -277,6 +287,16 @@ public static void writeDeviceResourcesFile(String part, Device device, CodePerf
design.setPartName(part);
Series series = device.getSeries();

delayEstimator = null;
if (series == Series.UltraScalePlus) {
// Timing model only supports UltraScalePlus currently
boolean useUTurnNodes = true;
delayEstimator = new DelayEstimatorBase(device, new InterconnectInfo(), useUTurnNodes, 0);
TimingModel timingModel = new TimingModel(design.getDevice());
timingModel.build();
intrasiteAndLogicDelayModel = timingModel.getDelayModel();
}

t.start("populateEnums");
populateEnumerations(design, device);

Expand Down Expand Up @@ -477,7 +497,7 @@ public static void writeDeviceResourcesFile(String part, Device device, CodePerf
}

t.stop().start("Cell <-> BEL pin map");
EnumerateCellBelMapping.populateAllPinMappings(part, device, devBuilder, allStrings);
EnumerateCellBelMapping.populateAllPinMappings(part, device, devBuilder, allStrings, intrasiteAndLogicDelayModel);

t.stop().start("Packages");
populatePackages(allStrings, device, devBuilder);
Expand Down Expand Up @@ -629,8 +649,24 @@ public static void writeAllSiteTypesToBuilder(Design design, Device device, Devi
for (int j=0; j < allSitePIPs.length; j++) {
DeviceResources.Device.SitePIP.Builder spBuilder = spBuilders.get(j);
SitePIP sitePIP = allSitePIPs[j];
spBuilder.setInpin(allBELPins.getIndex(sitePIP.getInputPin()));
spBuilder.setOutpin(allBELPins.getIndex(sitePIP.getOutputPin()));
BELPin inputPin = sitePIP.getInputPin();
spBuilder.setInpin(allBELPins.getIndex(inputPin));
BELPin outputPin = sitePIP.getOutputPin();
spBuilder.setOutpin(allBELPins.getIndex(outputPin));

// Write out delay of SitePIP
if (intrasiteAndLogicDelayModel != null) {
BELPin frBelPin = inputPin.getSourcePin();
String frBelPinString = (frBelPin.isSitePort() ? "" : frBelPin.getBELName() + "/") + frBelPin.getName();
BELPin toBelPin = outputPin.getSiteConns().get(0);
String toBelPinString = (toBelPin.isSitePort() ? "" : toBelPin.getBELName() + "/") + toBelPin.getName();
Short delayPs = intrasiteAndLogicDelayModel.getIntraSiteDelay(siteInst.getSiteTypeEnum(), frBelPinString, toBelPinString);
if (delayPs != null && delayPs > 0) {
DeviceResources.Device.CornerModel.Builder delayBuilder = spBuilder.initDelay();
DeviceResources.Device.CornerModelValues.Builder slowBuilder = delayBuilder.initSlow().initSlow();
slowBuilder.initMax().setMax(delayPs * PICSECONDS_TO_SECONDS);
}
}
}

design.removeSiteInst(siteInst);
Expand Down Expand Up @@ -688,6 +724,9 @@ public static Map<TileTypeEnum, Integer> writeAllTileTypesToBuilder(Design desig
StructList.Builder<TileType.Builder> tileTypesList = devBuilder.initTileTypeList(tileTypes.size());

Map<TileTypeEnum, Integer> tileTypeIndicies = new HashMap<TileTypeEnum, Integer>();
Map<Float, Integer> slowMaxDelayIndices = new HashMap<>();
// Make the zero index no delay
slowMaxDelayIndices.put(0f, 0);

int i=0;
for (Entry<TileTypeEnum,Tile> e : tileTypes.entrySet()) {
Expand Down Expand Up @@ -772,10 +811,55 @@ public static Map<TileTypeEnum, Integer> writeAllTileTypesToBuilder(Design desig
k++;
}
}

if (delayEstimator != null) {
Node startNode = pip.getStartNode();
if (!pip.getStartNode().isTied()) {
Node endNode = pip.getEndNode();
boolean includeBase = true;
boolean includeDiscontinuity = false;
float delayPs = RouterHelper.computeNodeDelay(delayEstimator, endNode, includeBase, includeDiscontinuity);
delayPs += DelayEstimatorBase.getExtraDelay(endNode, DelayEstimatorBase.isLong(startNode));
if (pip.isRouteThru()) {
if (Utils.isCLB(pip.getTile().getTileTypeEnum())) {
// Site port to cell
com.xilinx.rapidwright.device.SitePin fromSitePin = pip.getStartWire().getSitePin();
String fromSitePinName = fromSitePin.getPinName();
assert(fromSitePinName.matches("[A-H][1-6]"));
char lutLetter = fromSitePinName.charAt(0);
char pinNumber = fromSitePinName.charAt(1);
delayPs += intrasiteAndLogicDelayModel.getIntraSiteDelay(SiteTypeEnum.SLICEL, fromSitePinName, lutLetter + "6LUT/A" + pinNumber);
// Through cell
short belIdx = intrasiteAndLogicDelayModel.getBELIndex(lutLetter + "6LUT");
delayPs += intrasiteAndLogicDelayModel.getLogicDelay(belIdx, "A" + pinNumber, "O6");
// Cell to site port
com.xilinx.rapidwright.device.SitePin toSitePin = pip.getEndWire().getSitePin();
String toSitePinName = toSitePin.getPinName();
assert(toSitePinName.matches("[A-H](_O|MUX)"));
delayPs += intrasiteAndLogicDelayModel.getIntraSiteDelay(SiteTypeEnum.SLICEL, lutLetter + "6LUT/O6", toSitePinName);
}
}
if (delayPs != 0) {
int index = slowMaxDelayIndices.computeIfAbsent(delayPs, (v) -> slowMaxDelayIndices.size());
pipBuilder.setTiming(index);
}
}
}
}

i++;
}

StructList.Builder<DeviceResources.Device.PIPTiming.Builder> pipTimingsBuilder = devBuilder.initPipTimings(slowMaxDelayIndices.size());
for (Map.Entry<Float,Integer> e : slowMaxDelayIndices.entrySet()) {
float slowMaxDelayPs = e.getKey();
int index = e.getValue();
DeviceResources.Device.PIPTiming.Builder timingBuilder = pipTimingsBuilder.get(index);
DeviceResources.Device.CornerModel.Builder delayBuilder = timingBuilder.initInternalDelay();
DeviceResources.Device.CornerModelValues.Builder slowBuilder = delayBuilder.initSlow().initSlow();
slowBuilder.initMax().setMax(slowMaxDelayPs * PICSECONDS_TO_SECONDS);
}

return tileTypeIndicies;
}

Expand Down Expand Up @@ -843,18 +927,43 @@ public static void writeAllWiresAndNodesToBuilder(Device device, DeviceResources
wireBuilder.setType(wire.getIntentCode().ordinal());
}

Map<Float, Integer> slowMaxDelayIndices = new HashMap<>();
// Make the zero index no delay
slowMaxDelayIndices.put(0f, 0);

StructList.Builder<DeviceResources.Device.Node.Builder> nodeBuilders =
devBuilder.initNodes(allNodes.size());
for (int i=0; i < allNodes.size(); i++) {
DeviceResources.Device.Node.Builder nodeBuilder = nodeBuilders.get(i);
//Node node = allNodes.get(i);
long nodeKey = allNodes.get(i);
Node node = Node.getNode(device.getTile((int)(nodeKey >>> 32)), (int)(nodeKey & 0xffffffff));
Wire[] wires = node.getAllWiresInNode();
PrimitiveList.Int.Builder wBuilders = nodeBuilder.initWires(wires.length);
for (int k=0; k < wires.length; k++) {
wBuilders.set(k, allWires.getIndex(makeKey(wires[k].getTile(), wires[k].getWireIndex())));
}

if (delayEstimator != null && !node.isTied()) {
boolean incldueBase = false;
boolean includeDiscontinuity = true;
float delayPs = RouterHelper.computeNodeDelay(delayEstimator, node, incldueBase, includeDiscontinuity);
if (delayPs != 0) {
int index = slowMaxDelayIndices.computeIfAbsent(delayPs, (v) -> slowMaxDelayIndices.size());
nodeBuilder.setNodeTiming(index);
}
}
}

StructList.Builder<DeviceResources.Device.NodeTiming.Builder> nodeTimingsBuilder = devBuilder.initNodeTimings(slowMaxDelayIndices.size());
for (Map.Entry<Float,Integer> e : slowMaxDelayIndices.entrySet()) {
float slowMaxDelayPs = e.getKey();
int index = e.getValue();
DeviceResources.Device.NodeTiming.Builder timingBuilder = nodeTimingsBuilder.get(index);
// Delay represented as T = R * C where R = <delay in ps> and C = 1e-12 (1 ps)
DeviceResources.Device.CornerModelValues.Builder resBuilder = timingBuilder.initResistance().initSlow().initSlow();
resBuilder.initMax().setMax(slowMaxDelayPs);
DeviceResources.Device.CornerModelValues.Builder capBuilder = timingBuilder.initCapacitance().initSlow().initSlow();
capBuilder.initMax().setMax(PICSECONDS_TO_SECONDS);
}
}
private static void populatePackages(StringEnumerator allStrings, Device device, DeviceResources.Device.Builder devBuilder) {
Expand Down
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