Question

I need a function that will use my cpu 100% . I have a single core cpu any ideas ?

Does the thread need to be set in high priority ?

Answer 1

For example, by the next thread:

unit Unit2;

interface

uses
  Classes;

type
  TLoadThread = class(TThread)
  public
    class var Stop: Boolean;
  protected
    procedure Execute; override;
  public
    constructor Create;
  end;

implementation

constructor TLoadThread.Create;
begin
  inherited Create;
  FreeOnTerminate:= True;
end;

procedure TLoadThread.Execute;
begin
  repeat until Stop;
end;

end.

A usage example:

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

uses Unit2;

{$R *.dfm}

procedure LoadCPU;
begin
  TLoadThread.Stop:= False;
  TLoadThread.Create;
end;

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

procedure TForm1.Button2Click(Sender: TObject);
begin
  TLoadThread.Stop:= True;
end;

if your CPU has N cores, click Button1 N times to reach 100% CPU load; no need to increase thread priority.