详解C#获取特定进程CPU和内存使用率

然后是执行代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;

namespace CSharpPerformance
{//该程序可以实时监控程序本身对应进程的工作集、私有工作集和CPU使用率
  class Program
  {
    static void Main(string[] args)
    {
      //获取当前进程对象
      Process cur = Process.GetCurrentProcess();

      PerformanceCounter curpcp = new PerformanceCounter("Process", "Working Set - Private", cur.ProcessName);
      PerformanceCounter curpc = new PerformanceCounter("Process", "Working Set", cur.ProcessName);
      PerformanceCounter curtime = new PerformanceCounter("Process", "% Processor Time", cur.ProcessName);

      //上次记录CPU的时间
      TimeSpan prevCpuTime = TimeSpan.Zero;
      //Sleep的时间间隔
      int interval = 1000;

      PerformanceCounter totalcpu = new PerformanceCounter("Processor", "% Processor Time", "_Total");

      SystemInfo sys = new SystemInfo();
      const int KB_DIV = 1024;
      const int MB_DIV = 1024 * 1024;
      const int GB_DIV = 1024 * 1024 * 1024;
      while (true)
      {
        //第一种方法计算CPU使用率
        //当前时间
        TimeSpan curCpuTime = cur.TotalProcessorTime;
        //计算
        double value = (curCpuTime - prevCpuTime).TotalMilliseconds / interval / Environment.ProcessorCount * 100;
        prevCpuTime = curCpuTime;

        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}", cur.ProcessName, "工作集(进程类)", cur.WorkingSet64 / 1024,value);//这个工作集只是在一开始初始化，后期不变
        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}", cur.ProcessName, "工作集    ", curpc.NextValue() / 1024,value);//这个工作集是动态更新的
        //第二种计算CPU使用率的方法
        Console.WriteLine("{0}:{1} {2:N}KB CPU使用率：{3}%", cur.ProcessName, "私有工作集  ", curpcp.NextValue() / 1024,curtime.NextValue()/Environment.ProcessorCount);
        //Thread.Sleep(interval);

        //第一种方法获取系统CPU使用情况
        Console.Write("r系统CPU使用率：{0}%", totalcpu.NextValue());
        //Thread.Sleep(interval);

        //第二章方法获取系统CPU和内存使用情况
        Console.Write("r系统CPU使用率：{0}%，系统内存使用大小：{1}MB({2}GB)", sys.CpuLoad, (sys.PhysicalMemory - sys.MemoryAvailable) / MB_DIV, (sys.PhysicalMemory - sys.MemoryAvailable) / (double)GB_DIV);
        Thread.Sleep(interval);
      }

      Console.ReadLine();
    }
  }
}