java tcp程序太慢（在同一台计算机上）

Question

因此，基本上我在计算机广告上运行了2个Java应用程序，然后在我传输数据之后，我计算了通过Java tcp的传输速度，并且速度始终在7 MegaBits /秒左右，无论如何，我一直期望至少每秒56mbits，这是客户端应用程序：

 import java.io.*;
import java.net.*;

class TCPClient
{
 public static void main(String argv[]) throws Exception
 {


 System.out.println("Hello, World");


           String modifiedSentence;
           BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
           Socket clientSocket = new Socket("127.0.0.1", 7);

           BufferedInputStream inFromServer  = new BufferedInputStream(clientSocket.getInputStream());

           double count=0;
           OutputStream socketOutputStream = clientSocket.getOutputStream();

        String s = "012345678901234567\n";    

        byte[] bytes = s.getBytes(); 

        final int BUFFER_SIZE = 65536;
        byte[] buffer = new byte[BUFFER_SIZE];

        // socketOutputStream.write(bytes);
        // inFromServer.read(buffer);
        // modifiedSentence = new String(buffer);
        // System.out.println("FROM SERVER:" + modifiedSentence);
         socketOutputStream.write(bytes);
         long times=System.nanoTime() ;
        long temp=times;long temp2=times;
           while (true) {
               socketOutputStream.write(bytes);
           count++;

           socketOutputStream.flush();
               if(count>=100000){
                   break;

               }

           }

           times=System.nanoTime() ;
           System.out.println("time(ns) : " + (times-temp2));
           double speed=(72*2*count)/(double)((times-temp2)*Math.pow(10,-9));
           System.out.println("speed : " + speed/(1024*1024));
           clientSocket.close();


 }
}

这是服务器代码：

import java.io.*;
import java.net.*;

class TCPClient extends Thread
{
    Socket clientSocket;
      public TCPClient(Socket socket) {
            super("KKMultiServerThread");
            this.clientSocket = socket;
            }

 public  void run() //throws Exception
 {


 System.out.println("Hello, World");
    try {

           String modifiedSentence;


           BufferedOutputStream outToServer = new BufferedOutputStream(clientSocket.getOutputStream());
           BufferedInputStream inFromServer  = new BufferedInputStream(clientSocket.getInputStream());

           double count=0;


        String s = "012345678901234567\n";    

        byte[] bytes = s.getBytes(); 
        long times=System.nanoTime() ;
        long temp=times;long temp2=times;
        final int BUFFER_SIZE = 19;
        byte[] buffer = new byte[BUFFER_SIZE];

         modifiedSentence = "";
           while ((inFromServer.read(buffer))!=-1) {

          // outToServer.write(bytes);
         //  outToServer.flush();


           }

           System.out.println("FROM SERVER:" + modifiedSentence);

           clientSocket.close();

     } catch (UnknownHostException e) {
         System.err.println("Don't know about host: taranis.");
         System.exit(1);
     } catch (IOException e) {
         System.err.println("Couldn't get I/O for "
                            + "the connection to: taranis.");
         System.exit(1);
     }


 }


}

服务器代码已调整为不写入，而仅接收和客户端仅发送通过吞吐量增加到27Mbit / sec，而不是50Mbit / sec，这是以太网的一半速度，有什么帮助吗？

Answer 1

我同意LJ2。

为了增加吞吐量，请将缓冲区大小调整为1024字节左右，然后发送相同数量的数据； 您目前仅发送18个字节； 这不是很有效。
另外，考虑仅在一侧读取...您正在进行乒乓球匹配（客户端读取和写入之后，服务器也是如此）-如果涉及吞吐量，则无济于事。