| /* |
| * 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.sysds.runtime.controlprogram.parfor; |
| |
| import java.lang.ref.SoftReference; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.spark.broadcast.Broadcast; |
| import org.apache.sysds.runtime.controlprogram.LocalVariableMap; |
| import org.apache.sysds.runtime.controlprogram.ParForProgramBlock; |
| import org.apache.sysds.runtime.controlprogram.caching.CacheBlock; |
| import org.apache.sysds.runtime.controlprogram.caching.CacheableData; |
| import org.apache.sysds.runtime.instructions.cp.Data; |
| |
| public class CachedReuseVariables |
| { |
| private final HashMap<Long, SoftReference<LocalVariableMap>> _data; |
| |
| public CachedReuseVariables() { |
| _data = new HashMap<>(); |
| } |
| |
| public synchronized boolean containsVars(long pfid) { |
| return _data.containsKey(pfid); |
| } |
| |
| @SuppressWarnings("unused") |
| public synchronized void reuseVariables(long pfid, LocalVariableMap vars, Collection<String> excludeList, Map<String, Broadcast<CacheBlock>> _brInputs, boolean cleanCache) { |
| |
| //fetch the broadcast variables |
| if (ParForProgramBlock.ALLOW_BROADCAST_INPUTS && !containsVars(pfid)) { |
| loadBroadcastVariables(vars, _brInputs); |
| } |
| |
| //check for existing reuse map |
| LocalVariableMap tmp = null; |
| if( containsVars(pfid) ) |
| tmp = _data.get(pfid).get(); |
| |
| //build reuse map if not created yet or evicted |
| if( tmp == null ) { |
| if( cleanCache ) |
| _data.clear(); |
| tmp = new LocalVariableMap(vars); |
| tmp.removeAllIn((excludeList instanceof HashSet) ? |
| (HashSet<String>)excludeList : new HashSet<>(excludeList)); |
| _data.put(pfid, new SoftReference<>(tmp)); |
| } |
| //reuse existing reuse map |
| else { |
| for( String varName : tmp.keySet() ) |
| vars.put(varName, tmp.get(varName)); |
| } |
| } |
| |
| public synchronized void clearVariables(long pfid) { |
| _data.remove(pfid); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private static void loadBroadcastVariables(LocalVariableMap variables, Map<String, Broadcast<CacheBlock>> brInputs) { |
| for( Entry<String, Broadcast<CacheBlock>> e : brInputs.entrySet() ) { |
| Data d = variables.get(e.getKey()); |
| CacheableData<CacheBlock> cdcb = (CacheableData<CacheBlock>) d; |
| cdcb.acquireModify(e.getValue().getValue()); |
| cdcb.setEmptyStatus(); // avoid eviction |
| cdcb.refreshMetaData(); |
| } |
| } |
| } |