Efficiency Mode for own app (FMX, Delphi12, Win11)

[Pamen 0]

Hi

does anyone know how to force Windows 11 "Efficiency Mode" for main process of the application at start?

Lowering process priority does not do it as Efficiency mode requires additional flags set. 

An Windows API in Delphi lacks the additional process flags...

[DelphiUdIT 257]

You can use WINMD or better this https://www.winsoft.sk/win32api.htm to get the update informations that you need. (EDIT: the link is taken from some topic of this forum)

 

By now, I know little bit, seems that Microsoft is still working on this and the things will change (like an extensions of API function).

 

For example the new definition of PROCESS_INFORMATION_CLASS is:

 

 PROCESS_INFORMATION_CLASS = (
    ProcessMemoryPriority,
    ProcessMemoryExhaustionInfo,
    ProcessAppMemoryInfo,
    ProcessInPrivateInfo,
    ProcessPowerThrottling,
    ProcessReservedValue1,
    ProcessTelemetryCoverageInfo,
    ProcessProtectionLevelInfo,
    ProcessLeapSecondInfo,
    ProcessMachineTypeInfo,
    ProcessInformationClassMax
  );

A little bit different from old one.

Edited July 21 by DelphiUdIT

[DelphiUdIT 257]

You can try this, derivated from Learn Microsoft - EcoQS and updated for Delphi (sorry for errors):

 

//I use _my to discriminate from bundle definitions

uses WinApi.Windows;    //Add this to uses unit

type
  ///<summary>Documentation: https://docs.microsoft.com/windows/win32/api/processthreadsapi/ne-processthreadsapi-process_information_class</summary>
  PROCESS_INFORMATION_CLASS_my = (
    ProcessMemoryPriority,
    ProcessMemoryExhaustionInfo,
    ProcessAppMemoryInfo,
    ProcessInPrivateInfo,
    ProcessPowerThrottling,
    ProcessReservedValue1,
    ProcessTelemetryCoverageInfo,
    ProcessProtectionLevelInfo,
    ProcessLeapSecondInfo,
    ProcessMachineTypeInfo,
    ProcessInformationClassMax
  );

type
  _PROCESS_POWER_THROTTLING_STATE = record
    Version: ULONG;
    ControlMask: ULONG;
    StateMask: ULONG;
  end;
  PROCESS_POWER_THROTTLING_STATE = _PROCESS_POWER_THROTTLING_STATE;
  PPROCESS_POWER_THROTTLING_STATE = ^PROCESS_POWER_THROTTLING_STATE;

const
  PROCESS_POWER_THROTTLING_CURRENT_VERSION = 1;
  PROCESS_POWER_THROTTLING_EXECUTION_SPEED = $1;

//Redefine API
function SetProcessInformation_my(hProcess: THandle; ProcessInformationClass: PROCESS_INFORMATION_CLASS_my;
  ProcessInformation: Pointer; ProcessInformationSize: DWORD): ByteBool; stdcall;
function SetProcessInformation_my; external kernel32 name 'SetProcessInformation' delayed;

implementation

{$R *.fmx}

function SetEfficiencyMode(PID: DWORD): Boolean;
var
  hProcess: THandle;
  PowerState: PROCESS_POWER_THROTTLING_STATE;
begin
  Result := false;
  hProcess := OpenProcess(PROCESS_SET_INFORMATION, False, PID);
  if hProcess <> 0 then
    begin
      ZeroMemory(@PowerState, SizeOf(PowerState));
      PowerState.Version := PROCESS_POWER_THROTTLING_CURRENT_VERSION;
      PowerState.ControlMask := PROCESS_POWER_THROTTLING_EXECUTION_SPEED;
      PowerState.StateMask := PROCESS_POWER_THROTTLING_EXECUTION_SPEED;

      Result := SetProcessInformation_my(hProcess, Process_Information_Class_my(ProcessPowerThrottling), @PowerState, SizeOf(PowerState));

      CloseHandle(hProcess);
    end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var Success: boolean;
begin
  Success := SetEfficiencyMode(GetCurrentProcessId);
  if Success  then
    ShowMessage('Efficiency mode activated successfully!')
  else
    ShowMessage('Error activating efficiency mode.');
end;

 

[Pamen 0]

Thank you very much both!

The second answer seems AI generated though - generally a good idea, cannot work.

Wish you a good Week.

Edited July 22 by Pamen

[DelphiUdIT 257]

45 minutes ago, Pamen said:

Thank you very much both!

The second answer seems AI generated though - generally a good idea, cannot work.

Wish you a good Week.

Why ?

https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-setprocessinformation

https://learn.microsoft.com/en-us/answers/questions/4052040/efficiency-mode-causing-performance-issue

 

This come from FireFox, and it's the UNIQUE in my 260 processes and 5000 Thread that go in a efficiency mode alone .... No other process known go in that mode, except if you force it with Task Manager.

 

It is at "firefox-release\hal\windows\WindowsProcessPriority.cpp", you can translate in Delphi.

 

 

 

Edited July 22 by DelphiUdIT