我想创建一个程序,即使在计算机空闲时也可以限制一个进程的cpu使用.
我已经制定了一个程序来设置进程的优先级,但如果计算机空闲,那么cpu的使用率可以达到95％.
该过程包含“元素”是我要限制的过程
我已经制定了一个程序来设置进程的优先级,但如果计算机空闲,那么cpu的使用率可以达到95％.
该过程包含“元素”是我要限制的过程
private static readonly string[] RestrictedProcess = new[] { "element" };
static void ProcessChecker(object o)
{
List<Process> resProc = new List<Process>();
foreach(Process p in Process.GetProcesses())
{
string s = p.ProcessName;
foreach(string rp in RestrictedProcess)
{
s = s.ToLower();
if (s.Contains(rp))
resProc.Add(p);
}
}
foreach(Process p in resProc)
{
p.PriorityBoostEnabled = false;
p.PriorityClass = ProcessPriorityClass.Idle;
p.MaxWorkingSet = new IntPtr(20000000);
}
SetPowerConfig(resProc.Count > 0 ? PowerOption.GreenComputing : PowerOption.Balanced);
}
提前致谢…
解决方法
如果您要限制的程序不是您的程序,则有几个选项：
>将进程优先级设置为空闲,并且不要限制cpu使用率,因为在任何情况下尽可能使用cpu.如果有一些有用的东西,那么让你的cpu运行100％是可行的.如果优先级空闲,则如果另一个程序需要cpu,则该特定进程的cpu使用率将会降低.
>如果您的系统是多核或多cpu,那么您可能需要设置processor affinity.这将告诉您的程序只使用您希望他使用的处理器.例如,如果您的程序是多线程的,并且能够消耗您的两个cpu的100％,则将其亲和力设置为仅使用一个cpu.那么他的使用量将只有50％.
>最差的选项,但实际使用的90％的“cpu限制程序”你会发现在网络上：衡量一个进程的cpu使用情况,并暂停和恢复它定期,直到cpu使用率达到你想要的值.
要暂停/恢复不是您的进程,您必须使用P / Invoke(并且这需要访问该进程,因此,如果您是Windows Vista或更高版本,请关注UAC以获取管理员权限)：
/// <summary>
/// The process-specific access rights.
/// </summary>
[Flags]
public enum ProcessAccess : uint
{
/// <summary>
/// required to terminate a process using TerminateProcess.
/// </summary>
Terminate = 0x1,/// <summary>
/// required to create a thread.
/// </summary>
CreateThread = 0x2,/// <summary>
/// Undocumented.
/// </summary>
SetSessionId = 0x4,/// <summary>
/// required to perform an operation on the address space of a process (see VirtualProtectEx and WriteProcessMemory).
/// </summary>
VmOperation = 0x8,/// <summary>
/// required to read memory in a process using ReadProcessMemory.
/// </summary>
VmRead = 0x10,/// <summary>
/// required to write to memory in a process using WriteProcessMemory.
/// </summary>
VmWrite = 0x20,/// <summary>
/// required to duplicate a handle using DuplicateHandle.
/// </summary>
DupHandle = 0x40,/// <summary>
/// required to create a process.
/// </summary>
CreateProcess = 0x80,/// <summary>
/// required to set memory limits using SetProcessWorkingSetSize.
/// </summary>
SetQuota = 0x100,/// <summary>
/// required to set certain information about a process,such as its priority class (see SetPriorityClass).
/// </summary>
SetInformation = 0x200,/// <summary>
/// required to retrieve certain information about a process,such as its token,exit code,and priority class (see OpenProcessToken,GetExitCodeProcess,GetPriorityClass,and IsProcessInJob).
/// </summary>
QueryInformation = 0x400,/// <summary>
/// Undocumented.
/// </summary>
SetPort = 0x800,/// <summary>
/// required to suspend or resume a process.
/// </summary>
SuspendResume = 0x800,/// <summary>
/// required to retrieve certain information about a process (see QueryFullProcessImageName). A handle that has the PROCESS_QUERY_INFORMATION access right is automatically granted PROCESS_QUERY_LIMITED_INFORMATION.
/// </summary>
QueryLimitedInformation = 0x1000,/// <summary>
/// required to wait for the process to terminate using the wait functions.
/// </summary>
Synchronize = 0x100000
}
[DllImport("ntdll.dll")]
internal static extern uint NtResumeProcess([In] IntPtr processHandle);
[DllImport("ntdll.dll")]
internal static extern uint NtSuspendProcess([In] IntPtr processHandle);
[DllImport("kernel32.dll",SetLastError = true)]
internal static extern IntPtr OpenProcess(
ProcessAccess desiredAccess,bool inheritHandle,int processId);
[DllImport("kernel32.dll",SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool CloseHandle([In] IntPtr handle);
public static void SuspendProcess(int processId)
{
IntPtr hProc = IntPtr.Zero;
try
{
// Gets the handle to the Process
hProc = OpenProcess(ProcessAccess.SuspendResume,false,processId);
if (hProc != IntPtr.Zero)
{
NtSuspendProcess(hProc);
}
}
finally
{
// Don't forget to close handle you created.
if (hProc != IntPtr.Zero)
{
CloseHandle(hProc);
}
}
}
