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...get the CPU Speed?
Autor: Sven Biork
[ Print tip ]  

Tip Rating (10):  
     


function GetCPUSpeed: Double;
const
  
DelayTime = 500;
var
  
TimerHi, TimerLo: DWORD;
  PriorityClass, Priority: Integer;
begin
  
PriorityClass := GetPriorityClass(GetCurrentProcess);
  Priority      := GetThreadPriority(GetCurrentThread);

  SetPriorityClass(GetCurrentProcess, REALTIME_PRIORITY_CLASS);
  SetThreadPriority(GetCurrentThread, THREAD_PRIORITY_TIME_CRITICAL);

  Sleep(10);
  asm
    
dw 310Fh
    mov TimerLo, eax
    mov TimerHi, edx
  end;
  Sleep(DelayTime);
  asm
    
dw 310Fh
    sub eax, TimerLo
    sbb edx, TimerHi
    mov TimerLo, eax
    mov TimerHi, edx
  end;

  SetThreadPriority(GetCurrentThread, Priority);
  SetPriorityClass(GetCurrentProcess, PriorityClass);

  Result := TimerLo / (1000 * DelayTime);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  
ShowMessage(Format('Your CPU speed: %f MHz', [GetCPUSpeed]));
end;


{Note:
 You should call the GetCPUSpeed function more than
 one time to get a good result. }

{Bemerkung:
 Die GetCPUSpeed Funktion sollte mehrere Male
 aufgerufen werden, um einen guten Mittelwert zu erhalten.}


 

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