org.apache.sysds.runtime.controlprogram.parfor

Class ResultMergeLocalMemory

java.lang.Object

org.apache.sysds.runtime.controlprogram.parfor.ResultMerge

org.apache.sysds.runtime.controlprogram.parfor.ResultMergeLocalMemory

All Implemented Interfaces:

Serializable

public class ResultMergeLocalMemory
extends ResultMerge

Local in-memory realization of result merge. If the resulting matrix is small enough to fit into the JVM memory, this class can be used for efficient serial or multi-threaded merge.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ResultMergeLocalMemory(MatrixObject out, MatrixObject[] in, String outputFilename, boolean accum)

Method Summary

Modifier and Type	Method and Description
MatrixObject	executeParallelMerge(int par) Merge all given input matrices in parallel into the given output matrix.
MatrixObject	executeSerialMerge() Merge all given input matrices sequentially into the given output matrix.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultMergeLocalMemory

public ResultMergeLocalMemory(MatrixObject out,
                              MatrixObject[] in,
                              String outputFilename,
                              boolean accum)

Method Detail

executeSerialMerge

public MatrixObject executeSerialMerge()

Description copied from class: ResultMerge

Merge all given input matrices sequentially into the given output matrix. The required space in-memory is the size of the output matrix plus the size of one input matrix at a time.

Specified by:

executeSerialMerge in class ResultMerge

Returns:

output (merged) matrix

executeParallelMerge

public MatrixObject executeParallelMerge(int par)

Description copied from class: ResultMerge

Merge all given input matrices in parallel into the given output matrix. The required space in-memory is the size of the output matrix plus the size of all input matrices.

Specified by:

executeParallelMerge in class ResultMerge

Parameters:

par - degree of parallelism

Returns:

output (merged) matrix