Prozessor Auslastung

[ichbins]

Eigentlich könnte man doch die WHILE-Schleife und das Sleep rausnehmen

Delphi-Quellcode:

unit Unit1; 

interface 

uses 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, StdCtrls; 

type 
  TPDWord = ^DWORD; 

  TSystem_Basic_Information = packed record 
    dwUnknown1: DWORD; 
    uKeMaximumIncrement: ULONG; 
    uPageSize: ULONG; 
    uMmNumberOfPhysicalPages: ULONG; 
    uMmLowestPhysicalPage: ULONG; 
    uMmHighestPhysicalPage: ULONG; 
    uAllocationGranularity: ULONG; 
    pLowestUserAddress: Pointer; 
    pMmHighestUserAddress: Pointer; 
    uKeActiveProcessors: ULONG; 
    bKeNumberProcessors: byte; 
    bUnknown2: byte; 
    wUnknown3: word; 
  end; 

type 
  TSystem_Performance_Information = packed record 
    liIdleTime: LARGE_INTEGER; {LARGE_INTEGER} 
    dwSpare: array[0..75] of DWORD; 
  end; 

type 
  TSystem_Time_Information = packed record 
    liKeBootTime: LARGE_INTEGER; 
    liKeSystemTime: LARGE_INTEGER; 
    liExpTimeZoneBias: LARGE_INTEGER; 
    uCurrentTimeZoneId: ULONG; 
    dwReserved: DWORD; 
  end; 

type 
  TForm1 = class(TForm) 
    Button1: TButton; 
    Label1: TLabel; 
    procedure Button1Click(Sender: TObject); 
  private 
    { Private-Deklarationen } 
  public 
    { Public-Deklarationen } 
  end; 

const 
  SystemBasicInformation = 0; 
  SystemPerformanceInformation = 2; 
  SystemTimeInformation = 3; 

var 
  Form1: TForm1; 
  NtQuerySystemInformation: function(infoClass: DWORD; 
    buffer: Pointer; 
    bufSize: DWORD; 
    returnSize: TPDword): DWORD; stdcall = nil; 


  liOldIdleTime: LARGE_INTEGER = (); 
  liOldSystemTime: LARGE_INTEGER = (); 

implementation 

{$R *.dfm} 

function Li2Double(x: LARGE_INTEGER): Double; 
begin 
  Result := x.HighPart * 4.294967296E9 + x.LowPart 
end; 

procedure GetCPUUsage; 
var 
  SysBaseInfo: TSystem_Basic_Information; 
  SysPerfInfo: TSystem_Performance_Information; 
  SysTimeInfo: TSystem_Time_Information; 
  status: Longint; {long} 
  dbSystemTime: Double; 
  dbIdleTime: Double; 

  bLoopAborted : boolean; 

begin 
  if @NtQuerySystemInformation = nil then 
    NtQuerySystemInformation := GetProcAddress(GetModuleHandle('ntdll.dll'), 
      'NtQuerySystemInformation'); 

  // get number of processors in the system 

  status := NtQuerySystemInformation(SystemBasicInformation, @SysBaseInfo, SizeOf(SysBaseInfo), nil); 
  if status <> 0 then Exit; 

  // Show some information 
  with SysBaseInfo do 
  begin 
      ShowMessage( 
      Format('uKeMaximumIncrement: %d'#13'uPageSize: %d'#13+ 
      'uMmNumberOfPhysicalPages: %d'+#13+'uMmLowestPhysicalPage: %d'+#13+ 
      'uMmHighestPhysicalPage: %d'+#13+'uAllocationGranularity: %d'#13+ 
      'uKeActiveProcessors: %d'#13'bKeNumberProcessors: %d', 
      [uKeMaximumIncrement, uPageSize, uMmNumberOfPhysicalPages, 
      uMmLowestPhysicalPage, uMmHighestPhysicalPage, uAllocationGranularity, 
      uKeActiveProcessors, bKeNumberProcessors])); 
  end; 


  bLoopAborted := False; 

    // get new system time 
    status := NtQuerySystemInformation(SystemTimeInformation, @SysTimeInfo, SizeOf(SysTimeInfo), 0); 
    if status <> 0 then Exit; 

    // get new CPU's idle time 
    status := NtQuerySystemInformation(SystemPerformanceInformation, @SysPerfInfo, SizeOf(SysPerfInfo), nil); 
    if status <> 0 then Exit; 

    // if it's a first call - skip it 
    if (liOldIdleTime.QuadPart <> 0) then 
    begin 

      // CurrentValue = NewValue - OldValue 
      dbIdleTime := Li2Double(SysPerfInfo.liIdleTime) - Li2Double(liOldIdleTime); 
      dbSystemTime := Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(liOldSystemTime); 

      // CurrentCpuIdle = IdleTime / SystemTime 
      dbIdleTime := dbIdleTime / dbSystemTime; 

      // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors 
      dbIdleTime := 100.0 - dbIdleTime * 100.0 / SysBaseInfo.bKeNumberProcessors + 0.5; 

      // Show Percentage 
      Form1.Label1.Caption := FormatFloat('CPU Usage: 0.0 %',dbIdleTime); 

      Application.ProcessMessages; 

      // Abort if user pressed ESC or Application is terminated 
      bLoopAborted := (GetKeyState(VK_ESCAPE) and 128 = 128) or Application.Terminated; 

    end; 

    // store new CPU's idle and system time 
    liOldIdleTime := SysPerfInfo.liIdleTime; 
    liOldSystemTime := SysTimeInfo.liKeSystemTime; 

end; 


procedure TForm1.Button1Click(Sender: TObject); 
begin 
  GetCPUUsage 
end; 

end.

wenns falsch ist, seid mir bitte nicht böse hab kein Delphi zum Testen auf meinem Internet-PC installiert