Package org.apache.sysds.hops.estim

Class SparsityEstimator

java.lang.Object

org.apache.sysds.hops.estim.SparsityEstimator

Direct Known Subclasses:

EstimatorBasicAvg, EstimatorBasicWorst, EstimatorBitsetMM, EstimatorDensityMap, EstimatorLayeredGraph, EstimatorMatrixHistogram, EstimatorRowWise, EstimatorSample, EstimatorSampleRa

public abstract class SparsityEstimator
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SparsityEstimator.OpCode

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MIN_PAR_THRESHOLD
static boolean	MULTI_THREADED_BUILD
static boolean	MULTI_THREADED_ESTIM

Constructor Summary

Constructors

Constructor	Description
SparsityEstimator()

Method Summary

Modifier and Type	Method	Description
abstract DataCharacteristics	estim(MMNode root)	Estimates the output sparsity of a DAG of matrix multiplications for the given operator graph of a single root node.
abstract double	estim(MatrixBlock m, SparsityEstimator.OpCode op)	Estimates the output sparsity for a given unary operation.
abstract double	estim(MatrixBlock m1, MatrixBlock m2)	Estimates the output sparsity for a single matrix multiplication.
abstract double	estim(MatrixBlock m1, MatrixBlock m2, SparsityEstimator.OpCode op)	Estimates the output sparsity for a given binary operation.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MULTI_THREADED_BUILD

public static boolean MULTI_THREADED_BUILD

MULTI_THREADED_ESTIM

public static boolean MULTI_THREADED_ESTIM

MIN_PAR_THRESHOLD

public static final int MIN_PAR_THRESHOLD

See Also:

• Constant Field Values

Constructor Details

SparsityEstimator

public SparsityEstimator()

Method Details

estim

public abstract DataCharacteristics estim(MMNode root)

Estimates the output sparsity of a DAG of matrix multiplications for the given operator graph of a single root node.

Parameters:

root - DAG root node

Returns:

output data characteristics

estim

public abstract double estim(MatrixBlock m1,
 MatrixBlock m2)

Estimates the output sparsity for a single matrix multiplication.

Parameters:

m1 - left-hand-side operand

m2 - right-hand-side operand

Returns:

sparsity

estim

public abstract double estim(MatrixBlock m1,
 MatrixBlock m2,
 SparsityEstimator.OpCode op)

Estimates the output sparsity for a given binary operation.

Parameters:

m1 - left-hand-side operand

m2 - right-hand-side operand

op - operator code

Returns:

sparsity

estim

public abstract double estim(MatrixBlock m,
 SparsityEstimator.OpCode op)

Estimates the output sparsity for a given unary operation.

Parameters:

m - left-hand-side operand

op - operator code

Returns:

sparsity