Process.PriorityClass 属性

参考

定义

命名空间:: System.Diagnostics

程序集:: System.Diagnostics.Process.dll

程序集:: System.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

获取或设置关联进程的总体优先级类别。

public:
 property System::Diagnostics::ProcessPriorityClass PriorityClass { System::Diagnostics::ProcessPriorityClass get(); void set(System::Diagnostics::ProcessPriorityClass value); };

public System.Diagnostics.ProcessPriorityClass PriorityClass { get; set; }

member this.PriorityClass : System.Diagnostics.ProcessPriorityClass with get, set

Public Property PriorityClass As ProcessPriorityClass

属性值

ProcessPriorityClass

关联进程的优先级类别，可从该类别计算进程的 BasePriority。

例外

Win32Exception

无法从关联的进程资源中设置或检索进程优先级信息。

或 -

进程标识符或进程句柄为零。（进程尚未启动。）

NotSupportedException

你正试图访问在远程计算机上运行的进程的 PriorityClass 属性。此属性仅可用于本地计算机上运行的进程。

InvalidOperationException

进程 Id 不可用。

InvalidEnumArgumentException

无法设置优先级类，因为它不使用有效的值，如 ProcessPriorityClass 枚举中所定义。

示例

以下示例启动记事本的实例。然后，该示例检索并显示关联进程的各种属性。该示例检测进程何时退出，并显示进程的退出代码。

#using <system.dll>

using namespace System;
using namespace System::Diagnostics;
int main()
{
   
   // Define variables to track the peak
   // memory usage of the process.
   _int64 peakPagedMem = 0,peakWorkingSet = 0,peakVirtualMem = 0;
   Process^ myProcess = nullptr;
   try
   {
      
      // Start the process.
      myProcess = Process::Start( "NotePad.exe" );
      
      // Display the process statistics until
      // the user closes the program.
      do
      {
         if (  !myProcess->HasExited )
         {
            
            // Refresh the current process property values.
            myProcess->Refresh();
            Console::WriteLine();
            
            // Display current process statistics.
            Console::WriteLine( "{0} -", myProcess );
            Console::WriteLine( "-------------------------------------" );
            Console::WriteLine( "  physical memory usage: {0}", myProcess->WorkingSet64 );
            Console::WriteLine( "  base priority: {0}", myProcess->BasePriority );
            Console::WriteLine( "  priority class: {0}", myProcess->PriorityClass );
            Console::WriteLine( "  user processor time: {0}", myProcess->UserProcessorTime );
            Console::WriteLine( "  privileged processor time: {0}", myProcess->PrivilegedProcessorTime );
            Console::WriteLine( "  total processor time: {0}", myProcess->TotalProcessorTime );
            Console::WriteLine("  PagedSystemMemorySize64: {0}", myProcess->PagedSystemMemorySize64);
            Console::WriteLine("  PagedMemorySize64: {0}", myProcess->PagedMemorySize64);
            
            // Update the values for the overall peak memory statistics.
            peakPagedMem = myProcess->PeakPagedMemorySize64;
            peakVirtualMem = myProcess->PeakVirtualMemorySize64;
            peakWorkingSet = myProcess->PeakWorkingSet64;
            if ( myProcess->Responding )
            {
               Console::WriteLine( "Status = Running" );
            }
            else
            {
               Console::WriteLine( "Status = Not Responding" );
            }
         }
      }
      while (  !myProcess->WaitForExit( 1000 ) );
      Console::WriteLine();
      Console::WriteLine( "Process exit code: {0}", myProcess->ExitCode );
      
      // Display peak memory statistics for the process.
      Console::WriteLine( "Peak physical memory usage of the process: {0}", peakWorkingSet );
      Console::WriteLine( "Peak paged memory usage of the process: {0}", peakPagedMem );
      Console::WriteLine( "Peak virtual memory usage of the process: {0}", peakVirtualMem );
   }
   finally
   {
      if ( myProcess != nullptr )
      {
         myProcess->Close();
      }
   }

}

using System;
using System.Diagnostics;

namespace ProcessSample
{
    class ProcessMonitorSample
    {
        public static void Main()
        {
            // Define variables to track the peak
            // memory usage of the process.
            long peakPagedMem   = 0,
                 peakWorkingSet = 0,
                 peakVirtualMem = 0;

            // Start the process.
            using (Process myProcess = Process.Start("NotePad.exe"))
            {
                // Display the process statistics until
                // the user closes the program.
                do
                {
                    if (!myProcess.HasExited)
                    {
                        // Refresh the current process property values.
                        myProcess.Refresh();

                        Console.WriteLine();

                        // Display current process statistics.

                        Console.WriteLine($"{myProcess} -");
                        Console.WriteLine("-------------------------------------");

                        Console.WriteLine($"  Physical memory usage     : {myProcess.WorkingSet64}");
                        Console.WriteLine($"  Base priority             : {myProcess.BasePriority}");
                        Console.WriteLine($"  Priority class            : {myProcess.PriorityClass}");
                        Console.WriteLine($"  User processor time       : {myProcess.UserProcessorTime}");
                        Console.WriteLine($"  Privileged processor time : {myProcess.PrivilegedProcessorTime}");
                        Console.WriteLine($"  Total processor time      : {myProcess.TotalProcessorTime}");
                        Console.WriteLine($"  Paged system memory size  : {myProcess.PagedSystemMemorySize64}");
                        Console.WriteLine($"  Paged memory size         : {myProcess.PagedMemorySize64}");

                        // Update the values for the overall peak memory statistics.
                        peakPagedMem   = myProcess.PeakPagedMemorySize64;
                        peakVirtualMem = myProcess.PeakVirtualMemorySize64;
                        peakWorkingSet = myProcess.PeakWorkingSet64;

                        if (myProcess.Responding)
                        {
                            Console.WriteLine("Status = Running");
                        }
                        else
                        {
                            Console.WriteLine("Status = Not Responding");
                        }
                    }
                }
                while (!myProcess.WaitForExit(1000));

                Console.WriteLine();
                Console.WriteLine($"  Process exit code          : {myProcess.ExitCode}");

                // Display peak memory statistics for the process.
                Console.WriteLine($"  Peak physical memory usage : {peakWorkingSet}");
                Console.WriteLine($"  Peak paged memory usage    : {peakPagedMem}");
                Console.WriteLine($"  Peak virtual memory usage  : {peakVirtualMem}");
            }
        }
    }
}

Imports System.Diagnostics

Namespace ProcessSample
    Class ProcessMonitorSample

        Public Shared Sub Main()

            ' Define variables to track the peak
            ' memory usage of the process.
            Dim peakPagedMem As Long = 0
            Dim peakWorkingSet As Long = 0
            Dim peakVirtualMem As Long = 0

            ' Start the process.
            Using myProcess = Process.Start("NotePad.exe")

                ' Display process statistics until
                ' the user closes the program.
                Do

                    If Not myProcess.HasExited Then

                        ' Refresh the current process property values.
                        myProcess.Refresh()

                        Console.WriteLine()

                        ' Display current process statistics.

                        Console.WriteLine($"{myProcess} -")
                        Console.WriteLine("-------------------------------------")

                        Console.WriteLine($"  Physical memory usage     : {myProcess.WorkingSet64}")
                        Console.WriteLine($"  Base priority             : {myProcess.BasePriority}")
                        Console.WriteLine($"  Priority class            : {myProcess.PriorityClass}")
                        Console.WriteLine($"  User processor time       : {myProcess.UserProcessorTime}")
                        Console.WriteLine($"  Privileged processor time : {myProcess.PrivilegedProcessorTime}")
                        Console.WriteLine($"  Total processor time      : {myProcess.TotalProcessorTime}")
                        Console.WriteLine($"  Paged system memory size  : {myProcess.PagedSystemMemorySize64}")
                        Console.WriteLine($"  Paged memory size         : {myProcess.PagedMemorySize64}")

                        ' Update the values for the overall peak memory statistics.
                        peakPagedMem = myProcess.PeakPagedMemorySize64
                        peakVirtualMem = myProcess.PeakVirtualMemorySize64
                        peakWorkingSet = myProcess.PeakWorkingSet64

                        If myProcess.Responding Then
                            Console.WriteLine("Status = Running")
                        Else
                            Console.WriteLine("Status = Not Responding")
                        End If
                    End If
                Loop While Not myProcess.WaitForExit(1000)

                Console.WriteLine()
                Console.WriteLine($"  Process exit code                         : {myProcess.ExitCode}")

                ' Display peak memory statistics for the process.
                Console.WriteLine($"  Peak physical memory usage of the process : {peakWorkingSet}")
                Console.WriteLine($"  Peak paged memory usage of the process    : {peakPagedMem}")
                Console.WriteLine($"  Peak virtual memory usage of the process  : {peakVirtualMem}")
            End Using
        End Sub
    End Class
End Namespace

注解

此属性返回的值表示进程最近刷新的优先级。若要获取最新的优先级，需要首先调用 Refresh() 方法。

进程优先级类包含一系列线程优先级级别。进程运行中具有不同优先级的线程相对于进程的优先级类。 Win32 使用四个优先级类，每个类具有七个基优先级级别。这些进程优先级类在枚举中ProcessPriorityClass捕获，这使你可以将进程优先级设置为Idle、、Normal、、High AboveNormal或BelowNormal RealTime。根据经过的时间或其他提升，当需要将进程置于其他人之前才能访问处理器时，操作系统可以更改基本优先级级别。此外，还可以设置 PriorityBoostEnabled 暂时提升已退出等待状态的线程的优先级。当进程返回到等待状态时，优先级将重置。

该 BasePriority 属性允许查看分配给进程的起始优先级。但是，由于它是只读的，因此不能使用 BasePriority 属性来设置进程的优先级。若要更改优先级，请使用属性 PriorityClass ，该属性获取或设置进程的总体优先级类别。

无法使用系统监视器查看优先级类。下表显示了值PriorityClass之间的关系BasePriority。

BasePriority	PriorityClass
4	Idle
8	Normal
13	High
24	RealTime

适用于

Process.PriorityClass 属性

定义

属性值

例外

示例

注解

适用于

另请参阅

其他资源