[英]Multi-threaded TCP Server with high CPU and keep increase thread count
我寫了一個簡單的多線程TCP C#服務器程序。運行程序后,我的CPU使用率很高,並且任務管理器中的線程數一直在增加。 誰能幫助我找出解決方法和提出建議?
這是我的代碼。
public class Program
{
static void Main(string[] args)
{
int _Port = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["TCPPort"]);
string _IP = System.Configuration.ConfigurationManager.AppSettings["TCPIP"];
TcpServer server = new TcpServer(_Port);
}
}
public class TcpServer
{
private TcpListener _server;
private Boolean _isRunning;
private static int defaultMax = 8;
public TcpServer(int port)
{
_server = new TcpListener(IPAddress.Any, port);
_server.Start();
_isRunning = true;
LoopClients();
}
public void LoopClients()
{
while (_isRunning)
{
TcpClient newClient = _server.AcceptTcpClient();
SentFirstTimeData_New(newClient);
Thread t = new Thread(new ParameterizedThreadStart(HandleClient));
t.Start(newClient);
}
}
public void HandleClient(object obj)
{
int requestCount = 0;
byte[] bytesFrom = new byte[209666];
string dataFromClient = null;
Byte[] sendBytes = null;
requestCount = 0;
int byteread = 0;
string respdata = string.Empty;
byte[] buffer = new byte[4096];
int numberOfBytesRead;
TcpClient client = (TcpClient)obj;
NetworkStream networkStream = client.GetStream();
IPAddress address = ((IPEndPoint)client.Client.RemoteEndPoint).Address;
Boolean bClientConnected = true;
int id = Thread.CurrentThread.ManagedThreadId;
while (bClientConnected)
{
try {
if (networkStream.DataAvailable)
{
byteread = networkStream.Read(bytesFrom, 0, (int)client.ReceiveBufferSize);
dataFromClient = Encoding.ASCII.GetString(bytesFrom).TrimEnd('\0');
System.Text.Encoding.ASCII.GetString(bytesFrom);
XmlDocument doc = new XmlDocument();
string xml = Encoding.UTF8.GetString(bytesFrom).TrimEnd('\0');
doc.LoadXml(xml);
XElement incc = XElement.Load(new XmlNodeReader(doc));
respdata = AysncTCPIncomeString(incc);
sendBytes = Encoding.ASCII.GetBytes(respdata);
networkStream.Write(sendBytes, 0, sendBytes.Length);
networkStream.Flush();
}
}
catch (Exception ex)
{
Helper.WriteLog("Exception=" + ex.Message);
}
}
}
public void SentFirstTimeData_New(TcpClient tc)
{
try
{
int threadid = Thread.CurrentThread.ManagedThreadId;
string Msg = HLStatusResponse.FirstTimeStatusSuccessfulResponse("STATUS", "1");
NetworkStream _NetworkStream = tc.GetStream();
if (_NetworkStream != null)
{
byte[] data = Encoding.ASCII.GetBytes(Msg);
_NetworkStream.Write(data, 0, data.Length);
Helper.WriteLog("ThreadId=" + threadid.ToString() + ";SentFirstTimeData :\t " + Msg);
}
}
catch (Exception ex)
{
Helper.WriteLog("Sent Though Tcp Eror :" + ex.ToString());
}
}
}
考慮下面這段代碼:
Boolean bClientConnected = true;
int id = Thread.CurrentThread.ManagedThreadId;
while (bClientConnected)
{
try {
if (networkStream.DataAvailable)
您永遠不會更改bClientConnected-始終為true,因此您的循環不會退出。
另外,如果連接是空閑的-也就是說,如果networkStream.DataAvailable為false-則您只是在while循環中進行任何操作。
如果每個客戶端都有一個線程,為什么不通過執行對套接字的讀取來阻止該線程呢? 然后,線程將不會旋轉浪費cpu無所作為。
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