[Quick tip] 20% performance improvement for hyperthreaded dual-core CPUs (i3, etc)

[Aleron Ives]

Dolphin uses 1 core if the dual core checkbox is disabled, 2 cores if the dual core checkbox is enabled, and 3 cores if you also enable LLE audio and Dolphin decides that it's safe to run LLE on a separate thread. Now that LLE is not needed for most games, Dolphin uses 2 cores at most on most games.

[nex86]

LLE makes the sequenced music in Zelda games sound more stable but eats lot of performance.
on HLE you might experience choppyness and sometimes some missing notes.

Also, has someone an idea what "EnableJIT = " under DSP in dolphin.ini does?
its disabled by default.

[Link_to_the_past]

(05-14-2015, 06:18 AM)nex86 Wrote: LLE makes the sequenced music in Zelda games sound more stable but eats lot of performance.
on HLE you might experience choppyness and sometimes some missing notes.

Also, has someone an idea what "EnableJIT = " under DSP in dolphin.ini does?
its disabled by default.

It is about lle audio, whether interpreter or recompiler will be used.

[nex86]

(05-14-2015, 07:06 AM)Link_to_the_past Wrote:

(05-14-2015, 06:18 AM)nex86 Wrote: LLE makes the sequenced music in Zelda games sound more stable but eats lot of performance.
on HLE you might experience choppyness and sometimes some missing notes.

Also, has someone an idea what "EnableJIT = " under DSP in dolphin.ini does?
its disabled by default.

It is about lle audio, whether interpreter or recompiler will be used.

ah so if I set this to true I can expect a speedboost when using LLE?
I will try this.

[nex86]

Code:

@ECHO off
START /AFFINITY 5 Dolphin.exe %*

I tried this on my i7-3770k and it is even slower now.

before: 105 fps
after: 75 fps

also, disabling HT in my UEFI does nothing to dolphin.
framerate remain the same as with HT on.

[admin89]

Your CPU is not a dual core . Obviously , this doesn't work with yours

[Qaazavaca Qaanic]

Looks like hyper-threading actually assigns all 4 physical cores to [0,3] and their equivalents to [4,7].
So try:

Code:

@echo off
start /affinity 3 Dolphin.exe %*

instead.

This above code might work better for mobile 2-4-core CPUs.
It shouldn't make a difference at all on 4-8 core desktop i7's.

It's worth a try anyway.

[TalynOne]

Another solution is to install Process Lasso (freeware) :
https://bitsum.com/processlasso/

Right click on Dolphin.exe, choose CPU Affinity on the popup menu and choose the "Avoid non physical cores" option.