1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package org.openjdk.micro.jdk.java.util.zip;

    26 

    27 import java.nio.ByteBuffer;

    28 import java.nio.charset.StandardCharsets;

    29 import java.util.Random;

    30 import java.util.concurrent.TimeUnit;

    31 import java.util.zip.Checksum;

    32 import org.openjdk.jmh.annotations.Benchmark;

    33 import org.openjdk.jmh.annotations.OperationsPerInvocation;

    34 import org.openjdk.jmh.annotations.OutputTimeUnit;

    35 import org.openjdk.jmh.annotations.Scope;

    36 import org.openjdk.jmh.annotations.Setup;

    37 import org.openjdk.jmh.annotations.State;

    38 

    39 /**

    40  *

    41  * Base class for benchmarking JDK supported Checksums.

    42  *

    43  * To use the base class extend it and use a setup method configure the checksum

    44  * field.

    45  * 

    46  */

    47 @State(Scope.Thread)

    48 @OutputTimeUnit(TimeUnit.MILLISECONDS)

    49 public abstract class ChecksumBenchmarks {

    50 

    51     private final byte[] bytes_1to9 = "123456789".getBytes(StandardCharsets.US_ASCII);

    52     private final byte[] byteArray_1k = new byte[1024];

    53     private final byte[] byteArray_64k = new byte[65536];

    54     private final ByteBuffer wrappedByteBuffer_1k = ByteBuffer.wrap(byteArray_1k);

    55     private final ByteBuffer readonlyByteBuffer_1k = ByteBuffer.wrap(byteArray_1k).asReadOnlyBuffer();

    56     private final ByteBuffer directByteBuffer_1k = ByteBuffer.allocateDirect(byteArray_1k.length);

    57     private final ByteBuffer wrappedByteBuffer_64k = ByteBuffer.wrap(byteArray_64k);

    58     private final ByteBuffer readonlyByteBuffer_64k = ByteBuffer.wrap(byteArray_64k).asReadOnlyBuffer();

    59     private final ByteBuffer directByteBuffer_64k = ByteBuffer.allocateDirect(byteArray_64k.length);

    60 

    61     @Setup

    62     final public void setup() {

    63         Random r = new Random(123456789L);

    64         r.nextBytes(byteArray_1k);

    65         r.nextBytes(byteArray_64k);

    66         directByteBuffer_1k.put(byteArray_1k);

    67         directByteBuffer_64k.put(byteArray_64k);

    68     }

    69 

    70     protected Checksum checksum;

    71 

    72     @Benchmark

    73     @OperationsPerInvocation(9)

    74     public void byteArray_9() {

    75         checksum.update(bytes_1to9);

    76     }

    77 

    78     @Benchmark

    79     @OperationsPerInvocation(1024)

    80     public void byteArray_1K() {

    81         checksum.update(byteArray_1k);

    82     }

    83 

    84     @Benchmark

    85     @OperationsPerInvocation(1024)

    86     public void wrappedByteBuffer_1K() {

    87         wrappedByteBuffer_1k.position(0);

    88         checksum.update(wrappedByteBuffer_1k);

    89     }

    90 

    91     @Benchmark

    92     @OperationsPerInvocation(1024)

    93     public void readonlyByteBuffer_1K() {

    94         readonlyByteBuffer_1k.position(0);

    95         checksum.update(readonlyByteBuffer_1k);

    96     }

    97 

    98     @Benchmark

    99     @OperationsPerInvocation(1024)

   100     public void directByteBuffer_1K() {

   101         directByteBuffer_1k.position(0);

   102         checksum.update(directByteBuffer_1k);

   103     }

   104 

   105     @Benchmark

   106     @OperationsPerInvocation(65536)

   107     public void byteArray_64K() {

   108         checksum.update(byteArray_64k);

   109     }

   110 

   111     @Benchmark

   112     @OperationsPerInvocation(65536)

   113     public void wrappedByteBuffer_64K() {

   114         wrappedByteBuffer_64k.position(0);

   115         checksum.update(wrappedByteBuffer_64k);

   116     }

   117 

   118     @Benchmark

   119     @OperationsPerInvocation(65536)

   120     public void readonlyByteBuffer_64K() {

   121         readonlyByteBuffer_64k.position(0);

   122         checksum.update(readonlyByteBuffer_64k);

   123     }

   124 

   125     @Benchmark

   126     @OperationsPerInvocation(65536)

   127     public void directByteBuffer_64K() {

   128         directByteBuffer_64k.position(0);

   129         checksum.update(directByteBuffer_64k);

   130     }

   131 }