C#获取特定进程CPU和内存使用率

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参考技术A   首先是获取特定进程对象,可以使用Process.GetProcesses()方法来获取系统中运行的所有进程,或者使用Process.GetCurrentProcess()方法来获取当前程序所对应的进程对象。当有了进程对象后,可以通过进程对象名称来创建PerformanceCounter类型对象,通过设定PerformanceCounter构造函数的参数实现获取特定进程的CPU和内存使用情况。

  具体实例代码如下:

  首先是获取本机中所有进程对象,分别输出某一时刻各个进程的.内存使用情况:

  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所有进程或者指定进程的工作集、私有工作集 class Program static void Main(string[] args) //新建一个Stopwatch变量用来统计程序运行时间 Stopwatch watch = Stopwatch.StartNew(); //获取本机运行的所有进程ID和进程名,并输出哥进程所使用的工作集和私有工作集 foreach (Process ps in Process.GetProcesses()) PerformanceCounter pf1 = new PerformanceCounter("Process", "Working Set - Private", ps.ProcessName); PerformanceCounter pf2 = new PerformanceCounter("Process", "Working Set", ps.ProcessName); Console.WriteLine("0:1 2:NKB", ps.ProcessName, "工作集(进程类)", ps.WorkingSet64 / 1024); Console.WriteLine("0:1 2:NKB", ps.ProcessName, "工作集 ", pf2.NextValue() / 1024); //私有工作集 Console.WriteLine("0:1 2:NKB", ps.ProcessName, "私有工作集 ", pf1.NextValue() / 1024); watch.Stop(); Console.WriteLine(watch.Elapsed); Console.ReadLine();

  其中,工作集ps.WorkingSet64是静态的,pf2.NextValue()是动态变化的,工作集包含进程运行时其独占的内存和与其他进程共享的内存的和,而私有工作集是只包含进程独占的内存。

  下面一组代码可以动态显示本程序所对应的进程的CPU和内存使用率的变化:

  首先是SystemInfo.cs类:

  using System;using System.Collections.Generic;using System.Diagnostics;using System.Threading;using System.IO;using System.Text;using System.Management;using System.Runtime.InteropServices;namespace CSharpPerformance public class SystemInfo private int m_ProcessorCount = 0; //CPU个数 private PerformanceCounter pcCpuLoad; //CPU计数器 private long m_PhysicalMemory = 0; //物理内存 private const int GW_HWNDFIRST = 0; private const int GW_HWNDNEXT = 2; private const int GWL_STYLE = (-16); private const int WS_VISIBLE = 268435456; private const int WS_BORDER = 8388608; #region AIP声明 [DllImport("IpHlpApi.dll")] extern static public uint GetIfTable(byte[] pIfTable, ref uint pdwSize, bool bOrder); [DllImport("User32")] private extern static int GetWindow(int hWnd, int wCmd); [DllImport("User32")] private extern static int GetWindowLongA(int hWnd, int wIndx); [DllImport("user32.dll")] private static extern bool GetWindowText(int hWnd, StringBuilder title, int maxBufSize); [DllImport("user32", CharSet = CharSet.Auto)] private extern static int GetWindowTextLength(IntPtr hWnd); #endregion #region 构造函数 ///

  /// 构造函数,初始化计数器等 ///

  public SystemInfo() //初始化CPU计数器 pcCpuLoad = new PerformanceCounter("Processor", "% Processor Time", "_Total"); pcCpuLoad.MachineName = "."; pcCpuLoad.NextValue(); //CPU个数 m_ProcessorCount = Environment.ProcessorCount; //获得物理内存 ManagementClass mc = new ManagementClass("Win32_ComputerSystem"); ManagementObjectCollection moc = mc.GetInstances(); foreach (ManagementObject mo in moc) if (mo["TotalPhysicalMemory"] != null) m_PhysicalMemory = long.Parse(mo["TotalPhysicalMemory"].ToString()); #endregion #region CPU个数 ///

  /// 获取CPU个数 ///

  public int ProcessorCount get return m_ProcessorCount; #endregion #region CPU占用率 ///

  /// 获取CPU占用率 ///

  public float CpuLoad get return pcCpuLoad.NextValue(); #endregion #region 可用内存 ///

  /// 获取可用内存 ///

  public long MemoryAvailable get long availablebytes = 0; //ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_PerfRawData_PerfOS_Memory"); //foreach (ManagementObject mo in mos.Get()) // // availablebytes = long.Parse(mo["Availablebytes"].ToString()); // ManagementClass mos = new ManagementClass("Win32_OperatingSystem"); foreach (ManagementObject mo in mos.GetInstances()) if (mo["FreePhysicalMemory"] != null) availablebytes = 1024 * long.Parse(mo["FreePhysicalMemory"].ToString()); return availablebytes; #endregion #region 物理内存 ///

  /// 获取物理内存 ///

  public long PhysicalMemory get return m_PhysicalMemory; #endregion #region 结束指定进程 ///

  /// 结束指定进程 ///

  ///

  进程的 Process IDpublic static void EndProcess(int pid) try Process process = Process.GetProcessById(pid); process.Kill(); catch #endregion #region 查找所有应用程序标题 ///

  /// 查找所有应用程序标题 ///

  ///

  应用程序标题范型

  public static List

  FindAllApps(int Handle) ListApps = new List(); int hwCurr; hwCurr = GetWindow(Handle, GW_HWNDFIRST); while (hwCurr > 0) int IsTask = (WS_VISIBLE | WS_BORDER); int lngStyle = GetWindowLongA(hwCurr, GWL_STYLE); bool TaskWindow = ((lngStyle & IsTask) == IsTask); if (TaskWindow) int length = GetWindowTextLength(new IntPtr(hwCurr)); StringBuilder sb = new StringBuilder(2 * length + 1); GetWindowText(hwCurr, sb, sb.Capacity); string strTitle = sb.ToString(); if (!string.IsNullOrEmpty(strTitle)) Apps.Add(strTitle); hwCurr = GetWindow(hwCurr, GW_HWNDNEXT); return Apps; #endregion

  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:NKB 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:NKB 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:NKB 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:1MB(2GB)", sys.CpuLoad, (sys.PhysicalMemory - sys.MemoryAvailable) / MB_DIV, (sys.PhysicalMemory - sys.MemoryAvailable) / (double)GB_DIV); Thread.Sleep(interval); Console.ReadLine();

  以上程序可以正常运行,没隔1S刷新一次,实现动态显示本程序对应进程的CPU和内存使用情况。

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