如何在C＃中获得CPU使用率？ [关闭]

9 回答

• 14

  这似乎对我有用，等待处理器达到一定百分比的一个例子

  var cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
  int usage = (int) cpuCounter.NextValue();
  while (usage == 0 || usage > 80)
  {
       Thread.Sleep(250);
       usage = (int)cpuCounter.NextValue();
  }
  

  回复于 2024-05-02T16:56:29+08:00
• 2

  您可以使用System.Diagnostics中的PerformanceCounter类 .

  像这样初始化：

  PerformanceCounter cpuCounter;
  PerformanceCounter ramCounter;
  
  cpuCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
  ramCounter = new PerformanceCounter("Memory", "Available MBytes");
  

  消费如下：

  public string getCurrentCpuUsage(){
              return cpuCounter.NextValue()+"%";
  }
  
  public string getAvailableRAM(){
              return ramCounter.NextValue()+"MB";
  }
  

  回复于 2024-05-02T16:56:29+08:00
• 52

  比需求多一点但我使用额外的计时器代码来跟踪并警告CPU使用率是否持续1分钟或更长时间的90％或更高 .

  public class Form1
  {
  
      int totalHits = 0;
  
      public object getCPUCounter()
      {
  
          PerformanceCounter cpuCounter = new PerformanceCounter();
          cpuCounter.CategoryName = "Processor";
          cpuCounter.CounterName = "% Processor Time";
          cpuCounter.InstanceName = "_Total";
  
                       // will always start at 0
          dynamic firstValue = cpuCounter.NextValue();
          System.Threading.Thread.Sleep(1000);
                      // now matches task manager reading
          dynamic secondValue = cpuCounter.NextValue();
  
          return secondValue;
  
      }
  
  
      private void Timer1_Tick(Object sender, EventArgs e)
      {
          int cpuPercent = getCPUCounter();
          if (cpuPercent >= 90)
          {
              totalHits = totalHits + 1;
              if (totalHits == 60)
              {
                  Interaction.MsgBox("ALERT 90% usage for 1 minute");
                  totalHits = 0;
              }                        
          }
          else
          {
              totalHits = 0;
          }
          Label1.Text = cpuPercent + " % CPU";
          Label2.Text = getRAMCounter() + " RAM Free";
          Label3.Text = totalHits + " seconds over 20% usage";
      }
  }
  

  回复于 2024-05-02T16:56:29+08:00
• 9

  花了一些时间阅读几个看起来相当复杂的不同线程，我想出了这个 . 我需要它用于我想监视SQL服务器的8核机器 . 对于下面的代码，我传入“sqlservr”作为appName .

  private static void RunTest(string appName)
  {
      bool done = false;
      PerformanceCounter total_cpu = new PerformanceCounter("Process", "% Processor Time", "_Total");
      PerformanceCounter process_cpu = new PerformanceCounter("Process", "% Processor Time", appName);
      while (!done)
      {
          float t = total_cpu.NextValue();
          float p = process_cpu.NextValue();
          Console.WriteLine(String.Format("_Total = {0}  App = {1} {2}%\n", t, p, p / t * 100));
          System.Threading.Thread.Sleep(1000);
      }
  }
  

  它似乎正确地测量了我的8核服务器上SQL使用的CPU百分比 .

  回复于 2024-05-02T16:56:29+08:00
• 3

  没关系，我明白了！谢谢你的帮助！

  这是执行此操作的代码：

  private void button1_Click(object sender, EventArgs e)
  {
      selectedServer = "JS000943";
      listBox1.Items.Add(GetProcessorIdleTime(selectedServer).ToString());
  }
  
  private static int GetProcessorIdleTime(string selectedServer)
  {
      try
      {
          var searcher = new
             ManagementObjectSearcher
               (@"\\"+ selectedServer +@"\root\CIMV2",
                "SELECT * FROM Win32_PerfFormattedData_PerfOS_Processor WHERE Name=\"_Total\"");
  
          ManagementObjectCollection collection = searcher.Get();
          ManagementObject queryObj = collection.Cast<ManagementObject>().First();
  
          return Convert.ToInt32(queryObj["PercentIdleTime"]);
      }
      catch (ManagementException e)
      {
          MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
      }
      return -1;
  }
  

  回复于 2024-05-02T16:56:29+08:00
• 19

  您可以使用WMI获取CPU百分比信息 . 如果您具有正确的权限，甚至可以登录到远程计算机 . 请查看http://www.csharphelp.com/archives2/archive334.html以了解您可以完成的任务 .

  也有用的可能是Win32_Process命名空间的MSDN参考 .

  另请参见CodeProject示例How To: (Almost) Everything In WMI via C# .

  回复于 2024-05-02T16:56:29+08:00
• 5

  CMS是正确的，但如果您在visual studio中使用服务器资源管理器并使用性能计数器选项卡，那么您可以弄清楚如何获得大量有用的指标 .

  回复于 2024-05-02T16:56:29+08:00
• 1

  我不喜欢在所有的 PerformanceCounter 解决方案中添加1秒钟 . 相反，我选择使用 WMI 解决方案 . 存在1秒等待/失速的原因是为了在使用 PerformanceCounter 时读数准确 . 但是，如果你经常调用这种方法并刷新这些信息，我建议不要经常发生这种延迟......即使考虑做一个异步过程来获得它 .

  我从这里开始使用片段Returning CPU usage in WMI using C#并在我的博客文章中添加了解决方案的完整说明：

  Get CPU Usage Across All Cores In C# Using WMI

  回复于 2024-05-02T16:56:29+08:00
• 186

  此类每1秒自动轮询一次计数器并且也是线程安全的：

  public class ProcessorUsage
  {
      const float sampleFrequencyMillis = 1000;
  
      protected object syncLock = new object();
      protected PerformanceCounter counter;
      protected float lastSample;
      protected DateTime lastSampleTime;
  
      /// <summary>
      /// 
      /// </summary>
      public ProcessorUsage()
      {
          this.counter = new PerformanceCounter("Processor", "% Processor Time", "_Total", true);
      }
  
      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      public float GetCurrentValue()
      {
          if ((DateTime.UtcNow - lastSampleTime).TotalMilliseconds > sampleFrequencyMillis)
          {
              lock (syncLock)
              {
                  if ((DateTime.UtcNow - lastSampleTime).TotalMilliseconds > sampleFrequencyMillis)
                  {
                      lastSample = counter.NextValue();
                      lastSampleTime = DateTime.UtcNow;
                  }
              }
          }
  
          return lastSample;
      }
  }
  

  回复于 2024-05-02T16:56:29+08:00