C#SOCKET长连接小数据程序未响应

最近由于业务的需要，Linux系统嵌入式设备往我做的服务程序发送数据。
速度奇慢，而且还是程序无响应。后来自己用C#写了一个客户端用来测试。已经用了线程池，不知道用法对不对。请大家帮忙看下。

服务端：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Net.Sockets;
using System.Net;

namespace consoleSocketServer
{
    class Program
    {
        static int socketCount = 0;
        static Socket serverSocket;
        static Socket clientSocket;
        public static int clientcount = 0;
        public int clientnum = 0;
        static int listSQL = 0;
        static bool asy = true;
        public static Int32 portServer = 0;
        public static string ipServer = “”;
        public static Thread threadSocketListen;
        public static Thread threadDoWork;
        public static Thread threadInsert;
        public static int countsql = 0;
        static void Main(string[] args)
        {
            IPAddress ipAddress;
            portServer = 4660;
            serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            ipAddress = IPAddress.Parse(“192.168.33.29”);
            ipServer = ipAddress.ToString();

            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, portServer);

            Console.WriteLine(“服务器IP：” + ipServer + ”  端口:” + portServer);
            serverSocket.Bind(localEndPoint);
            serverSocket.Listen(20);
            //设置线程池
            ThreadPool.SetMaxThreads(4, 4);
            //开启新的线程监听
            threadSocketListen = new Thread(SocketListen);
            threadSocketListen.Start();

            Console.WriteLine(“服务启动成功”);
        }

        static void SocketListen()
        {
            while (true)
            {

                //接受客户端信息
                clientSocket = serverSocket.Accept();
                //开启处理线程
                ThreadPool.QueueUserWorkItem(new WaitCallback(doWork));

                //threadDoWork = new Thread(new ThreadStart(doWork));
                //threadDoWork.Start();

            }
        }
        /// <summary>
        /// 处理方法
        /// </summary>
        static void doWork(object a)
        {

            //获取客户端信息 
            IPEndPoint ipEndPoint = (IPEndPoint)clientSocket.RemoteEndPoint;
            string address = ipEndPoint.Address.ToString();
            //Console.WriteLine(address + “:连接成功”);

            //取消息
            byte[] inBuffer = new byte[1024];
            byte[] outBuffer = new byte[8];
            string inBufferStr = “”;
            int rec = 0;
            StringBuilder sb = new StringBuilder();
            while (true)
            {
                try
                {
                    rec = clientSocket.Receive(inBuffer);//如果没有消息为空 阻塞 当前循环 
                    //收到的长度不够 忽略此次数据
                    if (rec <= 8)
                    {
                        continue;
                    }

                    int ll = inBuffer[4] + inBuffer[5] * 255;

                    inBufferStr = Encoding.UTF8.GetString(inBuffer, 8, ll);

                    Console.WriteLine(inBufferStr);

                    //回复收到 
                    outBuffer[4] = 0;
                    outBuffer[5] = 0;
                    outBuffer[6] = 0;
                    outBuffer[7] = 0;
                    outBuffer[3] = 0;
                    outBuffer[2] = 0;
                    outBuffer[1] = 0;
                    outBuffer[0] = 1;

                    clientSocket.Send(outBuffer, outBuffer.Length, SocketFlags.None);
                    socketCount++;
                    Console.WriteLine(socketCount.ToString());
                    //break;
                }
                catch (SocketException es)
                {
                    //clientSocket.Close();
                    return;
                }

            }

        }
    }
}

客户端：
using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Threading;

namespace SocketClient
{
    class Program
    {
        static Socket clientSocket;
        static void Main(string[] args)
        {
            try
            {
                //将网络端点表示为IP地址和端口 用于socket侦听时绑定 
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(“192.168.33.29”), 4660);

                clientSocket = new Socket(ipep.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

                //将Socket连接到服务器 
                clientSocket.Connect(ipep);

                string outBufferStr;
                //发送消息 
                outBufferStr = “123456789qwe|789654123|1|2015-04-22 10:51:34|6|test1|test2| “;
                byte[] tempb = Encoding.UTF8.GetBytes(outBufferStr);

                byte[] outBuffer = new byte[tempb.Length + 8];

                //加功能和长度
                outBuffer[0] = 1;
                outBuffer[1] = 0;
                outBuffer[2] = 0;
                outBuffer[3] = 0;
                outBuffer[4] = Convert.ToByte(tempb.Length % 255);
                outBuffer[5] = Convert.ToByte(tempb.Length / 255);
                outBuffer[6] = 0;
                outBuffer[7] = 0;

                for (int i = 0; i < tempb.Length; i++)
                {
                    outBuffer[8 + i] = tempb[i];
                }

                // Byte[] inBuffer = new Byte[1024];

                int kkk = 0;
                while (kkk <= 10000)
                {

                    clientSocket.Send(outBuffer, outBuffer.Length, SocketFlags.None);
                    kkk++;
                    Thread.Sleep(1);
                    Console.WriteLine(kkk.ToString());
                    //Console.WriteLine(“服务器响应：”);
                    //接收服务器端信息 
                    //clientSocket.Receive(inBuffer, 1024, SocketFlags.None);
                    //Console.WriteLine(Encoding.ASCII.GetString(inBuffer));
                }
                Console.WriteLine(kkk.ToString());
                Console.ReadLine();
            }
            catch (Exception exp)
            {
                Console.WriteLine(exp.Message);
                Console.ReadLine();

            }
        }

    }
}