org.apache.sysml.hops.MemoTable Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of systemml Show documentation
Show all versions of systemml Show documentation
Declarative Machine Learning
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.sysml.hops;
import java.util.ArrayList;
import java.util.HashMap;
import org.apache.sysml.hops.Hop.DataOpTypes;
import org.apache.sysml.hops.recompile.RecompileStatus;
import org.apache.sysml.parser.Expression.DataType;
import org.apache.sysml.runtime.matrix.MatrixCharacteristics;
/**
* Memoization Table (hop id, worst-case matrix characteristics).
*
*/
public class MemoTable
{
private HashMap _memo = null;
public MemoTable()
{
_memo = new HashMap();
}
public void init( ArrayList hops, RecompileStatus status)
{
//check existing status
if( hops == null || hops.isEmpty() || status == null
|| status.getTWriteStats().isEmpty() )
{
return; //nothing to do
}
//population via recursive search for treads
Hop.resetVisitStatus(hops);
for( Hop hop : hops )
rinit(hop, status);
}
public void init( Hop hop, RecompileStatus status)
{
//check existing status
if( hop == null || status == null
|| status.getTWriteStats().isEmpty() )
{
return; //nothing to do
}
//population via recursive search for treads
hop.resetVisitStatus();
rinit(hop, status);
}
public void extract( ArrayList hops, RecompileStatus status)
{
//check existing status
if( status == null )
return; //nothing to do
//extract all transient writes (must be dag root)
for( Hop hop : hops ) {
if( hop instanceof DataOp
&& ((DataOp)hop).getDataOpType()==DataOpTypes.TRANSIENTWRITE )
{
String varname = hop.getName();
Hop input = hop.getInput().get(0); //child
MatrixCharacteristics mc = getAllInputStats(input);
if( mc != null )
status.getTWriteStats().put(varname, mc);
else
status.getTWriteStats().remove(varname);
}
}
}
public void memoizeStatistics( long hopID, long dim1, long dim2, long nnz )
{
_memo.put(hopID, new MatrixCharacteristics(dim1, dim2, -1, -1, nnz));
}
public MatrixCharacteristics[] getAllInputStats( ArrayList inputs )
{
if( inputs == null )
return null;
MatrixCharacteristics[] ret = new MatrixCharacteristics[inputs.size()];
for( int i=0; i