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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.yarn.ropt;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import org.apache.sysml.hops.Hop;
import org.apache.sysml.hops.HopsException;
import org.apache.sysml.hops.OptimizerUtils;
import org.apache.sysml.parser.StatementBlock;
import org.apache.sysml.runtime.DMLRuntimeException;
import org.apache.sysml.runtime.controlprogram.ForProgramBlock;
import org.apache.sysml.runtime.controlprogram.FunctionProgramBlock;
import org.apache.sysml.runtime.controlprogram.IfProgramBlock;
import org.apache.sysml.runtime.controlprogram.ProgramBlock;
import org.apache.sysml.runtime.controlprogram.WhileProgramBlock;
public class GridEnumerationMemory extends GridEnumeration
{
public static final int DEFAULT_NSTEPS = 20; //old config: 15
public static final int DEFAULT_MEM_ADD = 1*1024*1024; //1MB
private int _nsteps = -1;
public GridEnumerationMemory( ArrayList prog, long min, long max )
throws DMLRuntimeException
{
super(prog, min, max);
_nsteps = DEFAULT_NSTEPS;
}
public void setNumSteps( int steps )
{
_nsteps = steps;
}
@Override
public ArrayList enumerateGridPoints()
throws DMLRuntimeException, HopsException
{
ArrayList ret = new ArrayList();
long gap = (long)(_max - _min) / (_nsteps-1);
//get memory estimates
ArrayList mem = new ArrayList();
getMemoryEstimates( _prog, mem );
//binning memory estimates to equi grid
HashSet preRet = new HashSet();
for( Long val : mem )
{
if( val < _min )
preRet.add( _min ); //only right side
else if( val > _max )
preRet.add( _max ); //only left side
else
{
long bin = Math.max((val-_min)/gap,0);
preRet.add( filterMax(_min + bin*gap) );
preRet.add( filterMax(_min + (bin+1)*gap) );
}
}
//create sorted output (to prevent over-provisioning)
for( Long val : preRet )
ret.add(val);
Collections.sort(ret); //asc
return ret;
}
private long filterMax( long val )
{
if( val > _max ) //truncate max
return _max;
return val;
}
private void getMemoryEstimates( ArrayList pbs, ArrayList mem )
throws HopsException
{
for( ProgramBlock pb : pbs )
getMemoryEstimates(pb, mem);
}
private void getMemoryEstimates( ProgramBlock pb, ArrayList mem )
throws HopsException
{
if (pb instanceof FunctionProgramBlock)
{
FunctionProgramBlock fpb = (FunctionProgramBlock)pb;
getMemoryEstimates(fpb.getChildBlocks(), mem);
}
else if (pb instanceof WhileProgramBlock)
{
WhileProgramBlock fpb = (WhileProgramBlock)pb;
getMemoryEstimates(fpb.getChildBlocks(), mem);
}
else if (pb instanceof IfProgramBlock)
{
IfProgramBlock fpb = (IfProgramBlock)pb;
getMemoryEstimates(fpb.getChildBlocksIfBody(), mem);
getMemoryEstimates(fpb.getChildBlocksElseBody(), mem);
}
else if (pb instanceof ForProgramBlock) //incl parfor
{
ForProgramBlock fpb = (ForProgramBlock)pb;
getMemoryEstimates(fpb.getChildBlocks(), mem);
}
else
{
StatementBlock sb = pb.getStatementBlock();
if( sb != null && sb.get_hops() != null ){
Hop.resetVisitStatus(sb.get_hops());
for( Hop hop : sb.get_hops() )
getMemoryEstimates(hop, mem);
}
}
}
private void getMemoryEstimates( Hop hop, ArrayList mem )
{
if( hop.isVisited() )
return;
//process childs
for(Hop hi : hop.getInput())
getMemoryEstimates(hi, mem);
//add memory estimates (scaled by CP memory ratio)
mem.add( (long)( (hop.getMemEstimate()+DEFAULT_MEM_ADD)
/OptimizerUtils.MEM_UTIL_FACTOR) );
hop.setVisited();
}
}