特定进程CPU和内存使用率

来源：互联网发布：淘宝会员账号编辑：程序博客网时间：2024/05/14 20:09

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：

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Diagnostics; 6 using System.Threading; 7  8 namespace CSharpPerformance 9 {//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10     class Program11     {12         static void Main(string[] args)13         {14             //新建一个Stopwatch变量用来统计程序运行时间15             Stopwatch watch = Stopwatch.StartNew();16             //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17             foreach (Process ps in Process.GetProcesses())18             {19                 PerformanceCounter pf1 = new PerformanceCounter("Process", "Working Set - Private", ps.ProcessName);20                 PerformanceCounter pf2 = new PerformanceCounter("Process", "Working Set", ps.ProcessName);21                 Console.WriteLine("{0}:{1}  {2:N}KB", ps.ProcessName, "工作集(进程类)", ps.WorkingSet64 / 1024);22                 Console.WriteLine("{0}:{1}  {2:N}KB", ps.ProcessName, "工作集        ", pf2.NextValue() / 1024);23                 //私有工作集24                 Console.WriteLine("{0}:{1}  {2:N}KB", ps.ProcessName, "私有工作集    ", pf1.NextValue() / 1024);25 26             }27 28             watch.Stop();29             Console.WriteLine(watch.Elapsed);30             Console.ReadLine();31         }32     }33 }

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：

  1 using System;  2 using System.Collections.Generic;  3 using System.Diagnostics;  4 using System.Threading;  5 using System.IO;  6 using System.Text;  7 using System.Management;  8 using System.Runtime.InteropServices;  9  10 namespace CSharpPerformance 11 { 12     public class SystemInfo 13     { 14         private int m_ProcessorCount = 0;   //CPU个数 15         private PerformanceCounter pcCpuLoad;   //CPU计数器 16         private long m_PhysicalMemory = 0;   //物理内存 17  18         private const int GW_HWNDFIRST = 0; 19         private const int GW_HWNDNEXT = 2; 20         private const int GWL_STYLE = (-16); 21         private const int WS_VISIBLE = 268435456; 22         private const int WS_BORDER = 8388608; 23  24         #region AIP声明 25         [DllImport("IpHlpApi.dll")] 26         extern static public uint GetIfTable(byte[] pIfTable, ref uint pdwSize, bool bOrder); 27  28         [DllImport("User32")] 29         private extern static int GetWindow(int hWnd, int wCmd); 30  31         [DllImport("User32")] 32         private extern static int GetWindowLongA(int hWnd, int wIndx); 33  34         [DllImport("user32.dll")] 35         private static extern bool GetWindowText(int hWnd, StringBuilder title, int maxBufSize); 36  37         [DllImport("user32", CharSet = CharSet.Auto)] 38         private extern static int GetWindowTextLength(IntPtr hWnd); 39         #endregion 40  41         #region 构造函数 42         /// <summary> 43         /// 构造函数，初始化计数器等 44         /// </summary> 45         public SystemInfo() 46         { 47             //初始化CPU计数器 48             pcCpuLoad = new PerformanceCounter("Processor", "% Processor Time", "_Total"); 49             pcCpuLoad.MachineName = "."; 50             pcCpuLoad.NextValue(); 51  52             //CPU个数 53             m_ProcessorCount = Environment.ProcessorCount; 54  55             //获得物理内存 56             ManagementClass mc = new ManagementClass("Win32_ComputerSystem"); 57             ManagementObjectCollection moc = mc.GetInstances(); 58             foreach (ManagementObject mo in moc) 59             { 60                 if (mo["TotalPhysicalMemory"] != null) 61                 { 62                     m_PhysicalMemory = long.Parse(mo["TotalPhysicalMemory"].ToString()); 63                 } 64             } 65         } 66         #endregion 67  68         #region CPU个数 69         /// <summary> 70         /// 获取CPU个数 71         /// </summary> 72         public int ProcessorCount 73         { 74             get 75             { 76                 return m_ProcessorCount; 77             } 78         } 79         #endregion 80  81         #region CPU占用率 82         /// <summary> 83         /// 获取CPU占用率 84         /// </summary> 85         public float CpuLoad 86         { 87             get 88             { 89                 return pcCpuLoad.NextValue(); 90             } 91         } 92         #endregion 93  94         #region 可用内存 95         /// <summary> 96         /// 获取可用内存 97         /// </summary> 98         public long MemoryAvailable 99         {100             get101             {102                 long availablebytes = 0;103                 //ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_PerfRawData_PerfOS_Memory");104                 //foreach (ManagementObject mo in mos.Get())105                 //{106                 //    availablebytes = long.Parse(mo["Availablebytes"].ToString());107                 //}108                 ManagementClass mos = new ManagementClass("Win32_OperatingSystem");109                 foreach (ManagementObject mo in mos.GetInstances())110                 {111                     if (mo["FreePhysicalMemory"] != null)112                     {113                         availablebytes = 1024 * long.Parse(mo["FreePhysicalMemory"].ToString());114                     }115                 }116                 return availablebytes;117             }118         }119         #endregion120 121         #region 物理内存122         /// <summary>123         /// 获取物理内存124         /// </summary>125         public long PhysicalMemory126         {127             get128             {129                 return m_PhysicalMemory;130             }131         }132         #endregion133 134         #region 结束指定进程135         /// <summary>136         /// 结束指定进程137         /// </summary>138         /// <param name="pid">进程的 Process ID</param>139         public static void EndProcess(int pid)140         {141             try142             {143                 Process process = Process.GetProcessById(pid);144                 process.Kill();145             }146             catch { }147         }148         #endregion149 150 151         #region 查找所有应用程序标题152         /// <summary>153         /// 查找所有应用程序标题154         /// </summary>155         /// <returns>应用程序标题范型</returns>156         public static List<string> FindAllApps(int Handle)157         {158             List<string> Apps = new List<string>();159 160             int hwCurr;161             hwCurr = GetWindow(Handle, GW_HWNDFIRST);162 163             while (hwCurr > 0)164             {165                 int IsTask = (WS_VISIBLE | WS_BORDER);166                 int lngStyle = GetWindowLongA(hwCurr, GWL_STYLE);167                 bool TaskWindow = ((lngStyle & IsTask) == IsTask);168                 if (TaskWindow)169                 {170                     int length = GetWindowTextLength(new IntPtr(hwCurr));171                     StringBuilder sb = new StringBuilder(2 * length + 1);172                     GetWindowText(hwCurr, sb, sb.Capacity);173                     string strTitle = sb.ToString();174                     if (!string.IsNullOrEmpty(strTitle))175                     {176                         Apps.Add(strTitle);177                     }178                 }179                 hwCurr = GetWindow(hwCurr, GW_HWNDNEXT);180             }181 182             return Apps;183         }184         #endregion     185     }186 }

然后是执行代码：

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Diagnostics; 6 using System.Threading; 7  8 namespace CSharpPerformance 9 {//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10     class Program11     {12         static void Main(string[] args)13         {14             //获取当前进程对象15             Process cur = Process.GetCurrentProcess();16 17             PerformanceCounter curpcp = new PerformanceCounter("Process", "Working Set - Private", cur.ProcessName);18             PerformanceCounter curpc = new PerformanceCounter("Process", "Working Set", cur.ProcessName);19             PerformanceCounter curtime = new PerformanceCounter("Process", "% Processor Time", cur.ProcessName);20 21             //上次记录CPU的时间22             TimeSpan prevCpuTime = TimeSpan.Zero;23             //Sleep的时间间隔24             int interval = 1000;25 26             PerformanceCounter totalcpu = new PerformanceCounter("Processor", "% Processor Time", "_Total");27 28             SystemInfo sys = new SystemInfo();29             const int KB_DIV = 1024;30             const int MB_DIV = 1024 * 1024;31             const int GB_DIV = 1024 * 1024 * 1024;32             while (true)33             {34                 //第一种方法计算CPU使用率35                 //当前时间36                 TimeSpan curCpuTime = cur.TotalProcessorTime;37                 //计算38                 double value = (curCpuTime - prevCpuTime).TotalMilliseconds / interval / Environment.ProcessorCount * 100;39                 prevCpuTime = curCpuTime;40 41                 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42                 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43                 //第二种计算CPU使用率的方法44                 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);45                 //Thread.Sleep(interval);46 47                 //第一种方法获取系统CPU使用情况48                 Console.Write("\r系统CPU使用率：{0}%", totalcpu.NextValue());49                 //Thread.Sleep(interval);50 51                 //第二章方法获取系统CPU和内存使用情况52                 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);53                 Thread.Sleep(interval);54             }55 56             Console.ReadLine();57         }58     }59 }

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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