1 /*
   2  * Copyright (c) 2014 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.bench.java.net;
  26 
  27 import java.io.IOException;
  28 import java.io.InputStream;
  29 import java.io.OutputStream;
  30 import java.net.InetAddress;
  31 import java.net.ServerSocket;
  32 import java.net.Socket;
  33 import java.net.SocketException;
  34 import java.util.concurrent.TimeUnit;
  35 
  36 import org.openjdk.jmh.annotations.BenchmarkMode;
  37 import org.openjdk.jmh.annotations.Benchmark;
  38 import org.openjdk.jmh.annotations.Mode;
  39 import org.openjdk.jmh.annotations.OutputTimeUnit;
  40 import org.openjdk.jmh.annotations.Scope;
  41 import org.openjdk.jmh.annotations.Setup;
  42 import org.openjdk.jmh.annotations.State;
  43 import org.openjdk.jmh.annotations.TearDown;
  44 
  45 /**
  46  * Tests the overheads of I/O API.
  47  * This test is known to depend heavily on network conditions and paltform.
  48  */
  49 @BenchmarkMode(Mode.Throughput)
  50 @OutputTimeUnit(TimeUnit.MILLISECONDS)
  51 @State(Scope.Thread)
  52 public class SocketReadWrite {
  53 
  54     private OutputStream os;
  55     private InputStream is;
  56     private ServerSocket ss;
  57     private Socket s1, s2;
  58     private ReadThread rt;
  59 
  60     @Setup
  61     public void beforeRun() throws IOException {
  62         InetAddress iaddr = InetAddress.getLocalHost();
  63 
  64         ss = new ServerSocket(0);
  65         s1 = new Socket(iaddr, ss.getLocalPort());
  66         s2 = ss.accept();
  67 
  68         os = s1.getOutputStream();
  69         is = s2.getInputStream();
  70 
  71         rt = new ReadThread(is);
  72         rt.start();
  73     }
  74 
  75     @TearDown
  76     public void afterRun() throws IOException, InterruptedException {
  77         os.write(0);
  78         os.close();
  79         is.close();
  80         s1.close();
  81         s2.close();
  82         ss.close();
  83         rt.join();
  84     }
  85 
  86     @Benchmark
  87     public void test() throws IOException {
  88         os.write((byte) 4711);
  89     }
  90 
  91     static class ReadThread extends Thread {
  92         private InputStream is;
  93 
  94         public ReadThread(InputStream is) {
  95             this.is = is;
  96         }
  97 
  98         public void run() {
  99             try {
 100                 while (is.read() > 0);
 101             } catch (SocketException ex) {
 102                 // ignore - most likely "socket closed", which means shutdown
 103             } catch (IOException e) {
 104                 e.printStackTrace();
 105             }
 106         }
 107     }
 108 
 109 }