1/*
2 * Copyright (C) 2016 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package benchmarks.regression;
18
19import com.google.caliper.Param;
20import java.io.File;
21import java.io.IOException;
22import java.io.RandomAccessFile;
23import java.nio.ByteBuffer;
24import java.nio.ByteOrder;
25import java.nio.CharBuffer;
26import java.nio.DoubleBuffer;
27import java.nio.FloatBuffer;
28import java.nio.IntBuffer;
29import java.nio.LongBuffer;
30import java.nio.ShortBuffer;
31import java.nio.channels.FileChannel;
32
33public class ByteBufferBulkBenchmark {
34    @Param({"true", "false"}) private boolean aligned;
35
36
37    enum MyBufferType {
38        DIRECT, HEAP, MAPPED
39    }
40    @Param private MyBufferType srcBufferType;
41    @Param private MyBufferType dataBufferType;
42
43    @Param({"4096", "1232896"}) private int bufferSize;
44
45    public static ByteBuffer newBuffer(boolean aligned, MyBufferType bufferType, int bsize) throws IOException {
46        int size = aligned ?  bsize : bsize + 8 + 1;
47        ByteBuffer result = null;
48        switch (bufferType) {
49        case DIRECT:
50            result = ByteBuffer.allocateDirect(size);
51            break;
52        case HEAP:
53            result = ByteBuffer.allocate(size);
54            break;
55        case MAPPED:
56            File tmpFile = File.createTempFile("MappedByteBufferTest", ".tmp");
57            tmpFile.createNewFile();
58            tmpFile.deleteOnExit();
59            RandomAccessFile raf = new RandomAccessFile(tmpFile, "rw");
60            raf.setLength(size);
61            FileChannel fc = raf.getChannel();
62            result = fc.map(FileChannel.MapMode.READ_WRITE, 0, fc.size());
63            break;
64        }
65        result.position(aligned ? 0 : 1);
66        return result;
67    }
68
69    public void timeByteBuffer_putByteBuffer(int reps) throws Exception {
70        ByteBuffer src = ByteBufferBulkBenchmark.newBuffer(aligned, srcBufferType, bufferSize);
71        ByteBuffer data = ByteBufferBulkBenchmark.newBuffer(aligned, dataBufferType, bufferSize);
72        for (int rep = 0; rep < reps; ++rep) {
73            src.position(aligned ? 0 : 1);
74            data.position(aligned ? 0 : 1 );
75            src.put(data);
76        }
77    }
78
79}
80