通过调用 DoSleep 方法动态的调整单个线程的 Sleep 时间 from Visual Studio 论坛

原帖：http://social.microsoft.com/Forums/zh-CN/visualcshartzhchs/thread/6164b1a7-aa2d-4d7f-bd7a-f316a90bc66f





// 下面的示例代码通过调用 DoSleep 方法动态的调整单个线程的 Sleep 时间
// 来达到平衡每个线程的处理能力, 希望对你有帮助
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace ConsoleApplication1
{
    class Program
    {
        static Dictionary<string, Int32> ExecuteCount = new Dictionary<string, int>();
        static Dictionary<string, Int32> SleepTime = new Dictionary<string, int>();
        static List<Thread> ThreadList = new List<Thread>();

        static void Main(string[] args)
        {
            for (int i = 0; i < 3; i++)
            {
                Thread t1 = new Thread(F1);
                t1.Name = string.Format("第({0})组,线程(1)", i);

                Thread t2 = new Thread(F1);
                t2.Name = string.Format("第({0})组,线程(2)", i);

                Thread t3 = new Thread(F1);
                t3.Name = string.Format("第({0})组,线程(3)", i);
                

                ExecuteCount.Add(t1.Name, 0);
                ExecuteCount.Add(t2.Name, 0);
                ExecuteCount.Add(t3.Name, 0);

                SleepTime.Add(t1.Name, 1);
                SleepTime.Add(t2.Name, 1);
                SleepTime.Add(t3.Name, 1);

                ThreadList.Add(t1);
                ThreadList.Add(t2);
                ThreadList.Add(t3);
            }

            foreach (Thread thread in ThreadList)
                thread.Start();
        }

        private static void F1()
        {
            while (true)
            {
                WriteErrorLog();
                DoSleep();
            }
        }

        //private static void F2()
        //{
        //    while (true)
        //    {
        //        WriteErrorLog();
        //        DoSleep();
        //    }
        //}

        //private static void F3()
        //{
        //    while (true)
        //    {
        //        WriteErrorLog();
        //        DoSleep();
        //    }
        //}

        /// <summary>
        /// 根据当前线程在整个纯程数组中的执行情况动态调整它的 Sleep 时间
        /// </summary>
        static void DoSleep()
        {
            if (ExecuteCount[Thread.CurrentThread.Name] > ExecuteCount.Values.Min())
            {
                // 如果某个线程运行速度快，那么增加它的 Sleep 时间
                SleepTime[Thread.CurrentThread.Name]++;
            }
            else
            {
                // 如果某个线程运行速度最慢，那么减少它的 Sleep 时间
                if (SleepTime[Thread.CurrentThread.Name] > 1)
                    SleepTime[Thread.CurrentThread.Name] = 1;
            }

            Thread.Sleep(SleepTime[Thread.CurrentThread.Name]);
        }

        static DateTime fBegin = DateTime.Now;
        /// <summary>
        /// 获取所有线程的整体执行速度，单位：秒
        /// </summary>
        static Decimal Speed
        {
            get 
            {
                Decimal executeSeconds = (Decimal)(DateTime.Now - fBegin).TotalSeconds;
                Decimal executeCount = (Decimal)ExecuteCount.Values.Sum();

                return Decimal.Round(executeCount / executeSeconds, 2);
            }
        }
        static object lockObj = new object();
        private static void WriteErrorLog()
        {
            lock (lockObj)
            {
                Thread.Sleep(1);
                Console.WriteLine(Thread.CurrentThread.Name
                    + " "
                    + DateTime.Now.ToString("HH:mm:ss.fffffff")
                    + " "
                    + ExecuteCount[Thread.CurrentThread.Name].ToString()
                    + " "
                    + SleepTime[Thread.CurrentThread.Name].ToString()
                    + " "
                    + Speed.ToString());

                ExecuteCount[Thread.CurrentThread.Name]++;

                if (ExecuteCount[Thread.CurrentThread.Name] % 500 == 0)
                {
                    Console.WriteLine("=================================================");
                    foreach (KeyValuePair<string, int> kv in ExecuteCount)
                        Console.WriteLine(string.Format("{0}  {1}", kv.Key, kv.Value));
                    Console.WriteLine("=================================================");
                    
                    Console.WriteLine("press any key to contuine ...");
                    Console.ReadKey();
                }
            }
        }
    }
}