/**
* 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.hadoop.hive.ql.exec.vector.mapjoin.fast;
import org.apache.hadoop.hive.ql.util.JavaDataModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashTable;
public abstract class VectorMapJoinFastHashTable implements VectorMapJoinHashTable {
public static final Logger LOG = LoggerFactory.getLogger(VectorMapJoinFastHashTable.class);
protected int logicalHashBucketCount;
protected int logicalHashBucketMask;
protected float loadFactor;
protected final int writeBuffersSize;
protected long estimatedKeyCount;
protected int metricPutConflict;
protected int largestNumberOfSteps;
protected int keysAssigned;
protected int resizeThreshold;
protected int metricExpands;
// 2^30 (we cannot use Integer.MAX_VALUE which is 2^31-1).
public static final int HIGHEST_INT_POWER_OF_2 = 1073741824;
public static final int ONE_QUARTER_LIMIT = HIGHEST_INT_POWER_OF_2 / 4;
public static final int ONE_SIXTH_LIMIT = HIGHEST_INT_POWER_OF_2 / 6;
public void throwExpandError(int limit, String dataTypeName) {
throw new RuntimeException(
"Vector MapJoin " + dataTypeName + " Hash Table cannot grow any more -- use a smaller container size. " +
"Current logical size is " + logicalHashBucketCount + " and " +
"the limit is " + limit + ". " +
"Estimated key count was " + (estimatedKeyCount == -1 ? "not available" : estimatedKeyCount) + ".");
}
private static void validateCapacity(long capacity) {
if (Long.bitCount(capacity) != 1) {
throw new AssertionError("Capacity must be a power of two");
}
if (capacity <= 0) {
throw new AssertionError("Invalid capacity " + capacity);
}
}
private static int nextHighestPowerOfTwo(int v) {
return Integer.highestOneBit(v) << 1;
}
public VectorMapJoinFastHashTable(
int initialCapacity, float loadFactor, int writeBuffersSize, long estimatedKeyCount) {
initialCapacity = (Long.bitCount(initialCapacity) == 1)
? initialCapacity : nextHighestPowerOfTwo(initialCapacity);
validateCapacity(initialCapacity);
this.estimatedKeyCount = estimatedKeyCount;
logicalHashBucketCount = initialCapacity;
logicalHashBucketMask = logicalHashBucketCount - 1;
resizeThreshold = (int)(logicalHashBucketCount * loadFactor);
this.loadFactor = loadFactor;
this.writeBuffersSize = writeBuffersSize;
}
@Override
public int size() {
return keysAssigned;
}
@Override
public long getEstimatedMemorySize() {
JavaDataModel jdm = JavaDataModel.get();
return JavaDataModel.alignUp(10L * jdm.primitive1() + jdm.primitive2(), jdm.memoryAlign());
}
}