多线程的优先级

[jin_ok]

如果有10个线程，默认情况下系统是不是给这10个线程指定一个优先级？谁分配了这10个线程的执行顺序？，怎样分配？

[daihua_1113]

配个好电脑 省担心这个问题 cpu自己解决

[dazhabai]

高优先级的线程可以完全阻止低优先级的线程执行，因此在改变线程的优先级时要特别小心。线程的优先级可以定义为ThreadPriority枚举的值，即Highest、AboveNormal、Normal、BelowNormal和 Lowest。

[dazhabai]

//
// Summary:
// The System.Threading.Thread can be scheduled after threads with AboveNormal
// priority and before those with BelowNormal priority. Threads have Normal
// priority by default.
Normal = 2,

[dazhabai]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace Ex_20_4
{
    class Program
    {
        static void Main(string[] args)
        {
            MyThreadClass o1 = new MyThreadClass("hackcat1,我的优先级是:Normal!");
            Thread t1 = new Thread(o1.ThreadMain);
            t1.Priority = ThreadPriority.Normal;
            t1.Start();
            MyThreadClass o2 = new MyThreadClass("hackcat2,我的优先级是:Normal!");
            Thread t2 = new Thread(o2.ThreadMain);
            t2.Priority = ThreadPriority.Normal;
            t2.Start();
            MyThreadClass o3 = new MyThreadClass("hackcat3,我的优先级是:Normal!");
            Thread t3 = new Thread(o3.ThreadMain);
            t3.Priority = ThreadPriority.Normal;
            t3.Start();
            MyThreadClass o4 = new MyThreadClass("hackcat4,我的优先级是:Normal!");
            Thread t4 = new Thread(o4.ThreadMain);
            t4.Priority = ThreadPriority.Normal;
            t4.Start();
            Console.Read();
        }
    }
    public class MyThreadClass
    {
        private String Msg;
        public MyThreadClass(String Msg)
        {
            this.Msg = Msg;
        }
        public void ThreadMain()
        {
            Console.WriteLine("字段Msg的值是{0}", Msg);
        }
    }
}

跑了10来次，发现每次结果都不一样，这个是不是随机的？

[okidasougo]

学习学习～～好东西

[queen25]

http://cache.baidu.com/c?m=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&p=893bdd16d9c25fe609bd9b7847&user=baidu

[yangjinCK]

线程会自动分配

[whb147]

一般情况下，谁有空就谁去干活

[这个还能被注册？]

好像这个和操作系统有关系...

[jianuMan]

有个默认的优先级

[beijingbeerman]

如果不指定，使用的是默认优先级。不过在c#中线程的优先级没什么用。我试验过。

[宇峰科技]

如果不指定，就由系统自由分配，当然也可以指定优先级