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/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.offheap;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicIntegerArray;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
import junit.framework.TestCase;
public abstract class MemoryChunkJUnitTestBase extends TestCase {
protected abstract MemoryChunk createChunk(int size);
public void testByteReadWrite() {
int CHUNK_SIZE = 1024;
MemoryChunk mc = createChunk(CHUNK_SIZE);
try {
for (int i=0; i computeHistogram(AtomicIntegerArray originalValues, final int granualarity) {
int[] values = new int[originalValues.length()];
for (int i=0; i < values.length; i++) {
values[i] = originalValues.get(i);
}
Arrays.sort(values);
ArrayList result = new ArrayList();
Bucket curBucket = new Bucket(values[0]);
result.add(curBucket);
for (int i=1; i < values.length; i++) {
int curVal = values[i];
if (!curBucket.addValue(curVal, granualarity)) {
curBucket = new Bucket(curVal);
result.add(curBucket);
}
}
return result;
}
static private class Bucket {
public Bucket(long l) {
base = l;
total = l;
count = 1;
}
public boolean addValue(long curVal, int granualarity) {
if (curVal < base || (curVal-base) > granualarity) {
return false;
}
total += curVal;
count++;
return true;
}
private final long base;
private long total;
private int count;
@Override
public String toString() {
return "" + (total/count) + ":" + count;
}
}
public void DISABLEtest256ByteArrayPerf() {
byte[] writeBytes = new byte[256];
for (int i=0; i < writeBytes.length; i++) {
writeBytes[i] = 1;
}
int ARRAYS_PER_CHUNK = 100000;
int CHUNK_SIZE = ARRAYS_PER_CHUNK * writeBytes.length;
MemoryChunk mc = createChunk(CHUNK_SIZE);
try {
int WRITE_ITERATIONS = 2000;
long startWrite = System.nanoTime();
for (int j=0; j