ClusterPlacer will cluster nodes in the given netlist and place the clusters on the device based on simulated-annealing as initial placement. More...

#include <ClusterPlacer.h>

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Public Member Functions
	ClusterPlacer (PlacementInfo *placementInfo, std::map< std::string, std::string > &JSONCfg, float connectionToFixedFactor=5.0)
	Construct a new Cluster Placer object. More...

	~ClusterPlacer ()

void	ClusterPlacement ()
	conduct cluster placement, cluster nodes in the given netlist and place the clusters on the device as initial placement. More...

Private Member Functions
bool	isDensePlacement ()

void	resetClusterInfo ()
	clean all information of the clusters (including PlacementUnit-Cluster mapping and the cluster-level netlist) More...

void	creaeClusterNets ()
	construct the netlist of the generated clusters based on the PlacementNet in PlacementInfo More...

void	setClusterNetsAdjMat ()
	construct the cluster nets adjacent matrix for simulated-annealing cluster placement More...

void	hypergraphPartitioning ()
	call specific partitioners to partition the design netlist into clusters for initial placement More...

void	basicPartitioning (int minClusterCellNum, int eachClusterDSPNum, int eachClusterBRAMNum)
	pure connectivity-based partitioning based on PaToH More...

void	clockBasedPartitioning (int minClusterCellNum, int eachClusterDSPNum, int eachClusterBRAMNum)
	initially cluster cells based on clock domains and conduct connectivity-based partitioning based on PaToH More...

void	userDefinedClusterBasedPartitioning (int minClusterCellNum, int eachClusterDSPNum, int eachClusterBRAMNum)
	initially cluster cells based on user-defined clusters and conduct connectivity-based partitioning based on PaToH More...

void	createUserDefinedClusterBasedClusterUnits ()
	initially cluster cells based on user-defined clusters More...

void	createLongPathClusterUnits ()
	initially cluster cells based on user-defined clusters More...

void	createClockBasedClusterUnits ()
	initially cluster cells based on clock domains More...

void	createSinglePUClusterUnits ()
	wrap single PlacementUnits into ClusterUnit for later uniform processing More...

void	refineClustersWithPredefinedClusters ()
	refine the elements in obtained clusters to ensure the cells in user-defined clusters in the same cluster More...

void	clusterPlacementUnits ()
	cluster the netlist and create ClusterUnit level netlist for SA placement More...

void	placeClusters ()
	conduct the ClusterUnit level SA placement and then map PlacementUnit to cluster location More...

void	placeUnitBaseOnClusterPlacement (const std::vector< std::pair< int, int >> &cluster2XY)
	map PlacementUnit to cluster location More...

bool	isClustersToLarges ()
	check whether the average size of clusters is greater than the given threshold More...

int	getPlacementUnitMaxPathLen (PlacementInfo::PlacementUnit *curPU)

float	random_float (float min, float max)

void	dumpClusters ()

void	drawClusters ()

Private Attributes
PlacementInfo *	placementInfo
	the PlacementInfo for this placer to handle More...

std::vector< std::set< int > >	clusters
	the resultant clusters of PlacementUnit (id) More...

std::map< std::string, std::string > &	JSONCfg

float	connectionToFixedFactor
	the enhancement ratio of the net between elements and I/Os More...

float	y2xRatio = 1.0
	the Y/X coordinate calibration factor More...

bool	verbose

bool	randomInitialPlacement = false

int	avgClusterSizeRequirement = 40000
	the requirement of the average size of clusters (the number of cells) More...

double	maxMinCutRate = 0.0333
	the maximum cut rate for netlist min-cut partitioning More...

std::vector< std::pair< int, int > >	cluster2XY
	mapping cluster id to X/Y location in the cluster bin More...

std::vector< std::pair< float, float > >	cluster2FP_XY
	mapping cluster id to floating-point X/Y location on device More...

std::vector< std::vector< float > >	clusterAdjMat

std::vector< float >	clusterCLBCellWeights

std::vector< float >	clusterDSPCellWeights

std::vector< float >	clusterBRAMCellWeights

std::vector< std::vector< float > >	cluster2FixedUnitMat

std::vector< float >	fixedX

std::vector< float >	fixedY

std::vector< int >	placementUnit2ClusterId

std::vector< int >	placementUnitId2ClusterUnitId

std::vector< PlacementInfo::ClusterUnit * >	clusterUnits

std::vector< PlacementInfo::ClusterNet * >	clusterNets

int	clockRegionXNum

int	clockRegionYNum

int	jobs
	the parallel (multi-threading) worker number More...

SAPlacer *	saPlacer = nullptr
	simulated-annealing placer for the cluster placement. More...

GraphPartitioner< std::vector< PlacementInfo::PlacementUnit * >, std::vector< PlacementInfo::PlacementNet * > > *	basicGraphPartitioner = nullptr
	basicGraphPartitioner will conduct partitioning at the PlacementUnit level considering connectivity and resource demand More...

GraphPartitioner< std::vector< PlacementInfo::ClusterUnit * >, std::vector< PlacementInfo::ClusterNet * > > *	userDefinedClusterBasedGraphPartitioner = nullptr
	userDefinedClusterBasedGraphPartitioner will conduct partitioning at the Cluster level considering connectivity and resource demand. The input clusters are obtained by user-defined information More...

GraphPartitioner< std::vector< PlacementInfo::ClusterUnit * >, std::vector< PlacementInfo::ClusterNet * > > *	clockBasedGraphPartitioner = nullptr
	clockBasedGraphPartitioner will conduct partitioning at the Cluster level considering connectivity and resource demand. The input clusters are obtained by clock domain. More...

Detailed Description

ClusterPlacer will cluster nodes in the given netlist and place the clusters on the device based on simulated-annealing as initial placement.

Definition at line 53 of file ClusterPlacer.h.

Constructor & Destructor Documentation

◆ ClusterPlacer()

ClusterPlacer::ClusterPlacer	(	PlacementInfo *	placementInfo,
		std::map< std::string, std::string > &	JSONCfg,
		float	connectionToFixedFactor = `5.0`
	)

Construct a new Cluster Placer object.

Parameters

placementInfo	the PlacementInfo for this placer to handle
JSONCfg	the user-defined placement configuration
connectionToFixedFactor	the enhancement ratio of the net between elements and I/Os

Definition at line 33 of file ClusterPlacer.cc.

◆ ~ClusterPlacer()

ClusterPlacer::~ClusterPlacer ( )

inline

Definition at line 65 of file ClusterPlacer.h.

Member Function Documentation

◆ basicPartitioning()

void ClusterPlacer::basicPartitioning	(	int	minClusterCellNum,
		int	eachClusterDSPNum,
		int	eachClusterBRAMNum
	)

private

pure connectivity-based partitioning based on PaToH

Parameters

minClusterCellNum	minimum number of cells in a cluster
eachClusterDSPNum	maximum number of DSP cells in a cluster
eachClusterBRAMNum	maximum number of BRAM cells in a cluster

Definition at line 338 of file ClusterPlacer.cc.

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◆ clockBasedPartitioning()

void ClusterPlacer::clockBasedPartitioning	(	int	minClusterCellNum,
		int	eachClusterDSPNum,
		int	eachClusterBRAMNum
	)

private

initially cluster cells based on clock domains and conduct connectivity-based partitioning based on PaToH

Parameters

minClusterCellNum	minimum number of cells in a cluster
eachClusterDSPNum	maximum number of DSP cells in a cluster
eachClusterBRAMNum	maximum number of BRAM cells in a cluster

Definition at line 399 of file ClusterPlacer.cc.

Referenced by hypergraphPartitioning().

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◆ ClusterPlacement()

void ClusterPlacer::ClusterPlacement ( )

conduct cluster placement, cluster nodes in the given netlist and place the clusters on the device as initial placement.

Definition at line 60 of file ClusterPlacer.cc.

Referenced by GlobalPlacer::clusterPlacement().

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◆ clusterPlacementUnits()

void ClusterPlacer::clusterPlacementUnits ( )

private

cluster the netlist and create ClusterUnit level netlist for SA placement

Definition at line 100 of file ClusterPlacer.cc.

Referenced by ClusterPlacement().

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◆ creaeClusterNets()

void ClusterPlacer::creaeClusterNets ( )

inlineprivate

construct the netlist of the generated clusters based on the PlacementNet in PlacementInfo

Definition at line 225 of file ClusterPlacer.h.

Referenced by clockBasedPartitioning(), and createUserDefinedClusterBasedClusterUnits().

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◆ createClockBasedClusterUnits()

void ClusterPlacer::createClockBasedClusterUnits ( )

private

initially cluster cells based on clock domains

Definition at line 235 of file ClusterPlacer.cc.

Referenced by clockBasedPartitioning().

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◆ createLongPathClusterUnits()

void ClusterPlacer::createLongPathClusterUnits ( )

private

initially cluster cells based on user-defined clusters

Definition at line 144 of file ClusterPlacer.cc.

Referenced by clockBasedPartitioning().

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◆ createSinglePUClusterUnits()

void ClusterPlacer::createSinglePUClusterUnits ( )

private

wrap single PlacementUnits into ClusterUnit for later uniform processing

Definition at line 324 of file ClusterPlacer.cc.

Referenced by clockBasedPartitioning(), and createUserDefinedClusterBasedClusterUnits().

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◆ createUserDefinedClusterBasedClusterUnits()

void ClusterPlacer::createUserDefinedClusterBasedClusterUnits ( )

private

initially cluster cells based on user-defined clusters

Definition at line 269 of file ClusterPlacer.cc.

Referenced by userDefinedClusterBasedPartitioning().

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◆ drawClusters()

void ClusterPlacer::drawClusters ( )

private

Definition at line 843 of file ClusterPlacer.cc.

Referenced by ClusterPlacement().

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◆ dumpClusters()

void ClusterPlacer::dumpClusters ( )

private

Definition at line 777 of file ClusterPlacer.cc.

Referenced by ClusterPlacement().

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◆ getPlacementUnitMaxPathLen()

int ClusterPlacer::getPlacementUnitMaxPathLen ( PlacementInfo::PlacementUnit * curPU )

inlineprivate

Definition at line 340 of file ClusterPlacer.h.

Referenced by setClusterNetsAdjMat().

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◆ hypergraphPartitioning()

void ClusterPlacer::hypergraphPartitioning ( )

private

call specific partitioners to partition the design netlist into clusters for initial placement

Definition at line 113 of file ClusterPlacer.cc.

Referenced by clusterPlacementUnits().

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◆ isClustersToLarges()

bool ClusterPlacer::isClustersToLarges ( )

private

check whether the average size of clusters is greater than the given threshold

Returns: true if the granularity is too high; false if the granularity is under constraints

Definition at line 527 of file ClusterPlacer.cc.

Referenced by hypergraphPartitioning().

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◆ isDensePlacement()

bool ClusterPlacer::isDensePlacement ( )

inlineprivate

Definition at line 203 of file ClusterPlacer.h.

Referenced by setClusterNetsAdjMat().

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◆ placeClusters()

void ClusterPlacer::placeClusters ( )

private

conduct the ClusterUnit level SA placement and then map PlacementUnit to cluster location

Definition at line 709 of file ClusterPlacer.cc.

Referenced by ClusterPlacement().

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◆ placeUnitBaseOnClusterPlacement()

void ClusterPlacer::placeUnitBaseOnClusterPlacement ( const std::vector< std::pair< int, int >> & cluster2XY )

private

map PlacementUnit to cluster location

Parameters

cluster2XY the cluster location at grid level

Definition at line 740 of file ClusterPlacer.cc.

Referenced by placeClusters().

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◆ random_float()

float ClusterPlacer::random_float	(	float	min,
		float	max
	)

inlineprivate

Definition at line 366 of file ClusterPlacer.h.

Referenced by ClusterPlacement().

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◆ refineClustersWithPredefinedClusters()

void ClusterPlacer::refineClustersWithPredefinedClusters ( )

private

refine the elements in obtained clusters to ensure the cells in user-defined clusters in the same cluster

It seems that this refining solution work poorly. Might be abandoned in the future.

Definition at line 457 of file ClusterPlacer.cc.

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◆ resetClusterInfo()

void ClusterPlacer::resetClusterInfo ( )

inlineprivate

clean all information of the clusters (including PlacementUnit-Cluster mapping and the cluster-level netlist)

Definition at line 214 of file ClusterPlacer.h.

Referenced by clockBasedPartitioning().

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◆ setClusterNetsAdjMat()

void ClusterPlacer::setClusterNetsAdjMat ( )

private

construct the cluster nets adjacent matrix for simulated-annealing cluster placement

Definition at line 593 of file ClusterPlacer.cc.

Referenced by clusterPlacementUnits().

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◆ userDefinedClusterBasedPartitioning()

void ClusterPlacer::userDefinedClusterBasedPartitioning	(	int	minClusterCellNum,
		int	eachClusterDSPNum,
		int	eachClusterBRAMNum
	)

private

initially cluster cells based on user-defined clusters and conduct connectivity-based partitioning based on PaToH

Parameters

minClusterCellNum	minimum number of cells in a cluster
eachClusterDSPNum	maximum number of DSP cells in a cluster
eachClusterBRAMNum	maximum number of BRAM cells in a cluster

Definition at line 361 of file ClusterPlacer.cc.

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Member Data Documentation

◆ avgClusterSizeRequirement

int ClusterPlacer::avgClusterSizeRequirement = 40000

private

the requirement of the average size of clusters (the number of cells)

Definition at line 125 of file ClusterPlacer.h.

Referenced by hypergraphPartitioning(), and isClustersToLarges().

◆ basicGraphPartitioner

GraphPartitioner<std::vector<PlacementInfo::PlacementUnit *>, std::vector<PlacementInfo::PlacementNet *> >* ClusterPlacer::basicGraphPartitioner = nullptr

private

basicGraphPartitioner will conduct partitioning at the PlacementUnit level considering connectivity and resource demand

Definition at line 185 of file ClusterPlacer.h.

Referenced by basicPartitioning(), and ~ClusterPlacer().

◆ clockBasedGraphPartitioner

GraphPartitioner<std::vector<PlacementInfo::ClusterUnit *>, std::vector<PlacementInfo::ClusterNet *> >* ClusterPlacer::clockBasedGraphPartitioner = nullptr

private

clockBasedGraphPartitioner will conduct partitioning at the Cluster level considering connectivity and resource demand. The input clusters are obtained by clock domain.

Definition at line 201 of file ClusterPlacer.h.

Referenced by clockBasedPartitioning().

◆ clockRegionXNum

int ClusterPlacer::clockRegionXNum

private

Definition at line 162 of file ClusterPlacer.h.

Referenced by ClusterPlacer(), and setClusterNetsAdjMat().

◆ clockRegionYNum

int ClusterPlacer::clockRegionYNum

private

Definition at line 162 of file ClusterPlacer.h.

Referenced by ClusterPlacer().

◆ cluster2FixedUnitMat

std::vector<std::vector<float> > ClusterPlacer::cluster2FixedUnitMat

private

Definition at line 152 of file ClusterPlacer.h.

Referenced by placeClusters(), and setClusterNetsAdjMat().

◆ cluster2FP_XY

std::vector<std::pair<float, float> > ClusterPlacer::cluster2FP_XY

private

mapping cluster id to floating-point X/Y location on device

Definition at line 143 of file ClusterPlacer.h.

Referenced by placeUnitBaseOnClusterPlacement().

◆ cluster2XY

std::vector<std::pair<int, int> > ClusterPlacer::cluster2XY

private

mapping cluster id to X/Y location in the cluster bin

Definition at line 137 of file ClusterPlacer.h.

Referenced by dumpClusters(), placeClusters(), and placeUnitBaseOnClusterPlacement().

◆ clusterAdjMat

std::vector<std::vector<float> > ClusterPlacer::clusterAdjMat

private

Definition at line 147 of file ClusterPlacer.h.

Referenced by drawClusters(), placeClusters(), and setClusterNetsAdjMat().

◆ clusterBRAMCellWeights

std::vector<float> ClusterPlacer::clusterBRAMCellWeights

private

Definition at line 150 of file ClusterPlacer.h.

Referenced by setClusterNetsAdjMat().

◆ clusterCLBCellWeights

std::vector<float> ClusterPlacer::clusterCLBCellWeights

private

Definition at line 148 of file ClusterPlacer.h.

Referenced by placeClusters(), and setClusterNetsAdjMat().

◆ clusterDSPCellWeights

std::vector<float> ClusterPlacer::clusterDSPCellWeights

private

Definition at line 149 of file ClusterPlacer.h.

Referenced by setClusterNetsAdjMat().

◆ clusterNets

std::vector<PlacementInfo::ClusterNet *> ClusterPlacer::clusterNets

private

Definition at line 160 of file ClusterPlacer.h.

Referenced by clockBasedPartitioning(), creaeClusterNets(), createUserDefinedClusterBasedClusterUnits(), resetClusterInfo(), userDefinedClusterBasedPartitioning(), and ~ClusterPlacer().

◆ clusters

std::vector<std::set<int> > ClusterPlacer::clusters

private

the resultant clusters of PlacementUnit (id)

a vector of the sets of PlacementUnit Id ==> clusters of PlacementUnit id

Definition at line 103 of file ClusterPlacer.h.

Referenced by basicPartitioning(), clockBasedPartitioning(), clusterPlacementUnits(), dumpClusters(), hypergraphPartitioning(), isClustersToLarges(), isDensePlacement(), refineClustersWithPredefinedClusters(), setClusterNetsAdjMat(), and userDefinedClusterBasedPartitioning().

◆ clusterUnits

std::vector<PlacementInfo::ClusterUnit *> ClusterPlacer::clusterUnits

private

Definition at line 159 of file ClusterPlacer.h.

Referenced by clockBasedPartitioning(), creaeClusterNets(), createClockBasedClusterUnits(), createLongPathClusterUnits(), createSinglePUClusterUnits(), createUserDefinedClusterBasedClusterUnits(), resetClusterInfo(), userDefinedClusterBasedPartitioning(), and ~ClusterPlacer().

◆ connectionToFixedFactor

float ClusterPlacer::connectionToFixedFactor

private

the enhancement ratio of the net between elements and I/Os

Definition at line 110 of file ClusterPlacer.h.

Referenced by placeClusters().

◆ fixedX

std::vector<float> ClusterPlacer::fixedX

private

Definition at line 153 of file ClusterPlacer.h.

Referenced by placeClusters(), and setClusterNetsAdjMat().

◆ fixedY

std::vector<float> ClusterPlacer::fixedY

private

Definition at line 154 of file ClusterPlacer.h.

Referenced by placeClusters(), and setClusterNetsAdjMat().

◆ jobs

int ClusterPlacer::jobs

private

the parallel (multi-threading) worker number

Definition at line 168 of file ClusterPlacer.h.

Referenced by basicPartitioning(), clockBasedPartitioning(), ClusterPlacer(), placeClusters(), and userDefinedClusterBasedPartitioning().

◆ JSONCfg

std::map<std::string, std::string>& ClusterPlacer::JSONCfg

private

Definition at line 104 of file ClusterPlacer.h.

Referenced by ClusterPlacement(), ClusterPlacer(), dumpClusters(), hypergraphPartitioning(), placeClusters(), and placeUnitBaseOnClusterPlacement().

◆ maxMinCutRate

double ClusterPlacer::maxMinCutRate = 0.0333

private

the maximum cut rate for netlist min-cut partitioning

Definition at line 131 of file ClusterPlacer.h.

Referenced by basicPartitioning(), clockBasedPartitioning(), hypergraphPartitioning(), and userDefinedClusterBasedPartitioning().

◆ placementInfo

PlacementInfo* ClusterPlacer::placementInfo

private

◆ placementUnit2ClusterId

std::vector<int> ClusterPlacer::placementUnit2ClusterId

private

Definition at line 156 of file ClusterPlacer.h.

Referenced by basicPartitioning(), clockBasedPartitioning(), placeUnitBaseOnClusterPlacement(), refineClustersWithPredefinedClusters(), setClusterNetsAdjMat(), and userDefinedClusterBasedPartitioning().

◆ placementUnitId2ClusterUnitId

std::vector<int> ClusterPlacer::placementUnitId2ClusterUnitId

private

Definition at line 158 of file ClusterPlacer.h.

Referenced by creaeClusterNets(), createClockBasedClusterUnits(), createLongPathClusterUnits(), createSinglePUClusterUnits(), createUserDefinedClusterBasedClusterUnits(), and resetClusterInfo().

◆ randomInitialPlacement

bool ClusterPlacer::randomInitialPlacement = false

private

Definition at line 119 of file ClusterPlacer.h.

Referenced by ClusterPlacement(), ClusterPlacer(), and placeUnitBaseOnClusterPlacement().

◆ saPlacer

SAPlacer* ClusterPlacer::saPlacer = nullptr

private

simulated-annealing placer for the cluster placement.

It will map the clusters to different cluster bins and try to minimize the rough total wirelength between the clusters.

Definition at line 177 of file ClusterPlacer.h.

Referenced by placeClusters(), and ~ClusterPlacer().

◆ userDefinedClusterBasedGraphPartitioner

GraphPartitioner<std::vector<PlacementInfo::ClusterUnit *>, std::vector<PlacementInfo::ClusterNet *> >* ClusterPlacer::userDefinedClusterBasedGraphPartitioner = nullptr

private

userDefinedClusterBasedGraphPartitioner will conduct partitioning at the Cluster level considering connectivity and resource demand. The input clusters are obtained by user-defined information

Definition at line 193 of file ClusterPlacer.h.

Referenced by userDefinedClusterBasedPartitioning(), and ~ClusterPlacer().

◆ verbose

bool ClusterPlacer::verbose

private

Definition at line 117 of file ClusterPlacer.h.

Referenced by basicPartitioning(), clockBasedPartitioning(), ClusterPlacer(), placeClusters(), and userDefinedClusterBasedPartitioning().

◆ y2xRatio

float ClusterPlacer::y2xRatio = 1.0

private

the Y/X coordinate calibration factor

Definition at line 116 of file ClusterPlacer.h.

Referenced by ClusterPlacer(), and placeClusters().

The documentation for this class was generated from the following files:

src/lib/HiFPlacer/placement/globalPlacement/ClusterPlacer.h
src/lib/HiFPlacer/placement/globalPlacement/ClusterPlacer.cc

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ClusterPlacer()

◆ ~ClusterPlacer()

Member Function Documentation

◆ basicPartitioning()

◆ clockBasedPartitioning()

◆ ClusterPlacement()

◆ clusterPlacementUnits()

◆ creaeClusterNets()

◆ createClockBasedClusterUnits()

◆ createLongPathClusterUnits()

◆ createSinglePUClusterUnits()

◆ createUserDefinedClusterBasedClusterUnits()

◆ drawClusters()

◆ dumpClusters()

◆ getPlacementUnitMaxPathLen()

◆ hypergraphPartitioning()

◆ isClustersToLarges()

◆ isDensePlacement()

◆ placeClusters()

◆ placeUnitBaseOnClusterPlacement()

◆ random_float()

◆ refineClustersWithPredefinedClusters()

◆ resetClusterInfo()

◆ setClusterNetsAdjMat()

◆ userDefinedClusterBasedPartitioning()

Member Data Documentation

◆ avgClusterSizeRequirement

◆ basicGraphPartitioner

◆ clockBasedGraphPartitioner

◆ clockRegionXNum

◆ clockRegionYNum

◆ cluster2FixedUnitMat

◆ cluster2FP_XY

◆ cluster2XY

◆ clusterAdjMat

◆ clusterBRAMCellWeights

◆ clusterCLBCellWeights

◆ clusterDSPCellWeights

◆ clusterNets

◆ clusters

◆ clusterUnits

◆ connectionToFixedFactor

◆ fixedX

◆ fixedY

◆ jobs

◆ JSONCfg

◆ maxMinCutRate

◆ placementInfo

◆ placementUnit2ClusterId

◆ placementUnitId2ClusterUnitId

◆ randomInitialPlacement

◆ saPlacer

◆ userDefinedClusterBasedGraphPartitioner

◆ verbose

◆ y2xRatio