Task.Factory.StartNew 测试

private int n = ; //问题规模
private int t = ; //等待时间
private int pageSize = ; //打印分页private void TestTaskStartNew()
{
Task.Factory.StartNew(() =>
{
Stopwatch stopwatch = Stopwatch.StartNew(); List<Task> taskList = new List<Task>();
for (int i = ; i <= n; i++)
{
Task task = Task.Factory.StartNew((obj) =>
{
Thread.Sleep(t); //等待时间 int index = (int)obj;
if (index % pageSize == )
{
this.TryInvoke2(() =>
{
textBox1.AppendText(index.ToString() + " ");
});
}
}, i, TaskCreationOptions.LongRunning);
taskList.Add(task);
}
Task.WaitAll(taskList.ToArray()); this.TryInvoke2(() =>
{
textBox1.AppendText(string.Format("\r\n【Task.Factory.StartNew 问题规模:{0} 等待时间:{1} 耗时：{2}秒】\r\n", n, t, stopwatch.Elapsed.TotalSeconds));
});
});
}private void TestTaskHelper()
{
Task.Factory.StartNew(() =>
{
Stopwatch stopwatch = Stopwatch.StartNew(); List<Task> taskList = new List<Task>();
for (int i = ; i <= n; i++)
{
Task task = TaskHelper.LargeTask.Run((obj) =>
{
Thread.Sleep(t); //等待时间 int index = (int)obj;
if (index % pageSize == )
{
this.TryInvoke2(() =>
{
textBox1.AppendText(index.ToString() + " ");
});
}
}, i);
taskList.Add(task);
}
Task.WaitAll(taskList.ToArray()); this.TryInvoke2(() =>
{
textBox1.AppendText(string.Format("\r\n【TaskHelper.LargeTask.Run {3}线程 问题规模:{0} 等待时间:{1} 耗时：{2}秒】\r\n", n, t, stopwatch.Elapsed.TotalSeconds, TaskHelper.LargeTask.ThreadCount));
});
});
}

private int n = ; //问题规模
private int t = ; //等待时间
private int pageSize = ; //打印分页private void TestTaskStartNew()
{
Task.Factory.StartNew(() =>
{
Stopwatch stopwatch = Stopwatch.StartNew(); List<Task> taskList = new List<Task>();
for (int i = ; i <= n; i++)
{
Task task = Task.Factory.StartNew((obj) =>
{
Thread.Sleep(t); //等待时间 int index = (int)obj;
if (index % pageSize == )
{
this.TryInvoke2(() =>
{
textBox1.AppendText(index.ToString() + " ");
});
}
}, i);
taskList.Add(task);
}
Task.WaitAll(taskList.ToArray()); this.TryInvoke2(() =>
{
textBox1.AppendText(string.Format("\r\n【Task.Factory.StartNew 问题规模:{0} 等待时间:{1} 耗时：{2}秒】\r\n", n, t, stopwatch.Elapsed.TotalSeconds));
});
});
}private void TestTaskHelper()
{
Task.Factory.StartNew(() =>
{
Stopwatch stopwatch = Stopwatch.StartNew(); List<Task> taskList = new List<Task>();
for (int i = ; i <= n; i++)
{
Task task = TaskHelper.LargeTask.Run((obj) =>
{
Thread.Sleep(t); //等待时间 int index = (int)obj;
if (index % pageSize == )
{
this.TryInvoke2(() =>
{
textBox1.AppendText(index.ToString() + " ");
});
}
}, i);
taskList.Add(task);
}
Task.WaitAll(taskList.ToArray()); this.TryInvoke2(() =>
{
textBox1.AppendText(string.Format("\r\n【TaskHelper.LargeTask.Run {3}线程 问题规模:{0} 等待时间:{1} 耗时：{2}秒】\r\n", n, t, stopwatch.Elapsed.TotalSeconds, TaskHelper.LargeTask.ThreadCount));
});
});
}

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;namespace Utils
{
public class LimitedTaskScheduler : TaskScheduler, IDisposable
{
#region 外部方法
[DllImport("kernel32.dll", EntryPoint = "SetProcessWorkingSetSize")]
public static extern int SetProcessWorkingSetSize(IntPtr process, int minSize, int maxSize);
#endregion #region 变量属性事件
private BlockingCollection<Task> _tasks = new BlockingCollection<Task>();
List<Thread> _threadList = new List<Thread>();
private int _threadCount = ;
private int _timeOut = Timeout.Infinite;
private Task _tempTask; public int ThreadCount
{
get
{
return _threadCount;
}
}
#endregion #region 构造函数
public LimitedTaskScheduler(int threadCount = )
{
CreateThreads(threadCount);
}
#endregion #region override GetScheduledTasks
protected override IEnumerable<Task> GetScheduledTasks()
{
return _tasks;
}
#endregion #region override TryExecuteTaskInline
protected override bool TryExecuteTaskInline(Task task, bool taskWasPreviouslyQueued)
{
return false;
}
#endregion #region override QueueTask
protected override void QueueTask(Task task)
{
_tasks.Add(task);
}
#endregion #region 资源释放
/// <summary>
/// 资源释放
/// 如果尚有任务在执行，则会在调用此方法的线程上引发System.Threading.ThreadAbortException，请使用Task.WaitAll等待任务执行完毕后，再调用该方法
/// </summary>
public void Dispose()
{
_timeOut = ; foreach (Thread item in _threadList)
{
item.Abort();
}
_threadList.Clear(); GC.Collect();
GC.WaitForPendingFinalizers();
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -, -);
}
}
#endregion #region 创建线程池
/// <summary>
/// 创建线程池
/// </summary>
private void CreateThreads(int? threadCount = null)
{
if (threadCount != null) _threadCount = threadCount.Value;
_timeOut = Timeout.Infinite; for (int i = ; i < _threadCount; i++)
{
Thread thread = new Thread(new ThreadStart(() =>
{
Task task;
while (_tasks.TryTake(out task, _timeOut))
{
TryExecuteTask(task);
}
}));
thread.IsBackground = true;
thread.Start();
_threadList.Add(thread);
}
}
#endregion #region 全部取消
/// <summary>
/// 全部取消
/// </summary>
public void CancelAll()
{
while (_tasks.TryTake(out _tempTask)) { }
}
#endregion }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace Utils
{
/// <summary>
/// Task帮助类基类
/// </summary>
public class TaskHelper
{
#region UI任务
private static LimitedTaskScheduler _UITask;
/// <summary>
/// UI任务(4个线程)
/// </summary>
public static LimitedTaskScheduler UITask
{
get
{
if (_UITask == null) _UITask = new LimitedTaskScheduler();
return _UITask;
}
}
#endregion #region 计算任务
private static LimitedTaskScheduler _CalcTask;
/// <summary>
/// 计算任务(8个线程)
/// </summary>
public static LimitedTaskScheduler CalcTask
{
get
{
if (_CalcTask == null) _CalcTask = new LimitedTaskScheduler();
return _CalcTask;
}
}
#endregion #region 网络请求
private static LimitedTaskScheduler _RequestTask;
/// <summary>
/// 网络请求(32个线程)
/// </summary>
public static LimitedTaskScheduler RequestTask
{
get
{
if (_RequestTask == null) _RequestTask = new LimitedTaskScheduler();
return _RequestTask;
}
}
#endregion #region 数据库任务
private static LimitedTaskScheduler _DBTask;
/// <summary>
/// 数据库任务(32个线程)
/// </summary>
public static LimitedTaskScheduler DBTask
{
get
{
if (_DBTask == null) _DBTask = new LimitedTaskScheduler();
return _DBTask;
}
}
#endregion #region IO任务
private static LimitedTaskScheduler _IOTask;
/// <summary>
/// IO任务(8个线程)
/// </summary>
public static LimitedTaskScheduler IOTask
{
get
{
if (_IOTask == null) _IOTask = new LimitedTaskScheduler();
return _IOTask;
}
}
#endregion #region 大线程池任务
private static LimitedTaskScheduler _LargeTask;
/// <summary>
/// 大线程池任务(64个线程)
/// </summary>
public static LimitedTaskScheduler LargeTask
{
get
{
if (_LargeTask == null) _LargeTask = new LimitedTaskScheduler();
return _LargeTask;
}
}
#endregion }
}