详解C#获取特定进程CPU和内存使用率

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:

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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:N}KB", ps.ProcessName, "工作集(进程类)", ps.WorkingSet64 / 1024);

Console.WriteLine("{0}:{1} {2:N}KB", ps.ProcessName, "工作集 ", pf2.NextValue() / 1024);

//私有工作集

Console.WriteLine("{0}:{1} {2:N}KB", 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:

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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

/// <summary>

/// 构造函数,初始化计数器等

/// </summary>

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

/// <summary>

/// 获取CPU个数

/// </summary>

public int ProcessorCount

{

get

{

return m_ProcessorCount;

}

}

#endregion

#region CPU占用率

/// <summary>

/// 获取CPU占用率

/// </summary>

public float CpuLoad

{

get

{

return pcCpuLoad.NextValue();

}

}

#endregion

#region 可用内存

/// <summary>

/// 获取可用内存

/// </summary>

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

/// <summary>

/// 获取物理内存

/// </summary>

public long PhysicalMemory

{

get

{

return m_PhysicalMemory;

}

}

#endregion

#region 结束指定进程

/// <summary>

/// 结束指定进程

/// </summary>

/// <param name="pid">进程的 Process ID</param>

public 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

/// <summary>

/// 查找所有应用程序标题

/// </summary>

/// <returns>应用程序标题范型</returns>

public static List<string> FindAllApps(int Handle)

{

List<string> Apps = new List<string>();

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:

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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();

}

}

}

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。

原文链接:http://www.cnblogs.com/maowang1991/p/3285983.html

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

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