使用.NET创建100,000个TCP连接-Creating100,000tcpconnectionsusing.NET

I am writing a little Comet server in C#, and to test it I have written a little program that opens a bunch of connections, writes a little text to each of them, and then closes each of them:

我正在用C#编写一个小Comet服务器,为了测试它,我编写了一个小程序,打开一堆连接,给每个连接写一个小文本,然后关闭它们中的每一个:

int basePort = 30000;
IPAddress localAddress = new IPAddress( new byte[] { 127, 0, 0, 1 } );
List sockets = new List();

for( int i = 0; i <20000; i++ ) {
    Socket s = new Socket( AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );
    s.Bind( new IPEndPoint( localAddress, basePort + i ) );
    s.Connect( "localhost", 1999 );
    sockets.Add( s );
}

string message = "hello";
byte[] messageData = Encoding.ASCII.GetBytes( message );
foreach( Socket s in sockets ) {
    s.Send( messageData );
}

foreach( Socket s in sockets ) {
    s.Disconnect( false );
}

I am using Windows XP at the moment, which only assigns dynamic client ports from the 1025 to 5000 range, so I have added explicit binding to ports starting at 30000. This took me from under 4000 connections to a little more than 16000, but now I am getting the following exception on Socket.Connect:

我目前正在使用Windows XP,它只分配1025到5000范围内的动态客户端端口,所以我已经从30000开始添加到端口的显式绑定。这使我从4000以下连接到16000多一点,但现在我在Socket.Connect上遇到以下异常:

"An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full 127.0.0.1:1999"

“无法执行对套接字的操作,因为系统缺少足够的缓冲区空间或因为队列已满127.0.0.1:1999”

Any thoughts? Changing the send and receive buffer size doesn't seem to make any difference, and it always seems to be my client app that breaks, never my server. I realize I'm going to run out of client ports before I get to 100,000 connections, but I'd still like to understand what is going on a little better.

有什么想法吗?更改发送和接收缓冲区大小似乎没有任何区别,它似乎总是我的客户端应用程序打破,从来没有我的服务器。我意识到在达到100,000个连接之前我将耗尽客户端端口,但我仍然想要了解更好的情况。

3 个解决方案