User:Handlingcfg/Affinity Settings

When game performance (fps) is limited by cpu, setting specific affinity and priority could change the performance of the game. changing priority may cause stability issues for some games.

Basics

On multicore systems different variables effects the performance, therefore running game code on different configrations differentiates the fps. Generally, there are three main variable affects perfromance:

-The number of threads that game engine uses

-SMT (or HT) being on or off

-cpu affinity of game (affinity on real cores-faster cores)

Games developed to work on specific number of threads. This number depends to publishers market expectation and statistical distribution of core count of potential users for that time period.

-if game designed to work on 4 cores, and user has less than 4, the performance will be slower

-if game designed to work on 4 cores and user has more than 4, the performance could be slower or not.

-if ht/smt feature is on and user have 4 or more cores, the performance could be slower.

Setting Affinity with custom shortcut

method 1:

1)create new txt file in executables directory

2)add the line below with changing names

%WINDIR%\System32\cmd.exe /C start "exe name(here can be empty)" /AFFINITY NN "path to exe"

for NN:use [affinity calculator]

3)rename the file to ".bat"

4)create shortcut to bat file and change its icon

method 2 (with powershell):

if method 1 wont work for some situations:

1)create new txt file in executables directory

2)add the line below with changing names

%WINDIR%\System32\cmd.exe /C start "exe name(here can be empty)" /AFFINITY XX "path to exe"

than add the line below to second line

PowerShell "$Process = Get-Process -Name """gamenamewithouthspace*""" ; $Process.ProcessorAffinity=YY"

the * character is wildcard, it is used for remaining letters. for example for far cry 5, far* can be used, if only process is starting with far letters, it will work.

YY:is same number with NN,only starts with 0x, its like 0xNN

3)rename the file to ".bat"

4)create shortcut to bat file and change its icon

Set Priority with custom shortcut

add the line below to the bat file

wmic process where name="game.exe" CALL setpriority "128"

Turning off ht/smt

It is either turned of in bios, or with softwares that changing bios-efi settings (like amd ryzen master). For this you need to search how to change your motherboard brands bios.

General Affinity Mask numbers for ht/smt open

1--------1 core

5--------2 core

15-------3 core

55-------4 core

155------5 core

555------6 core

1555-----7 core

5555-----8 core

note:if ht/smt closed or your cpu doesnte have this feature, just use sequential numbers.