Ppsspp: [Windows][OpenGL][FPS Go Down]GRAN TURISMO (UCJS10100) goes down FPS in any Menu Screen.

[nassau-tk]

What happens?

FPS very goes down In Menu Screen.
But,Playing(Driving) screen is good FPS no problem.

The issue has strange point.
It's will happen only Windwos/OpenGL.
Android/OpenGL will not go down any FPS.

I tested 1x resolution and window size but It happen.
I checked the log-console.
But red code was nothing.

"Android phone device better than Windows10 DeskTop PC."
It's surprise!

What should happen?

Windwos/OpenGL should became same as Android/OpenGL.

What hardware, operating system, and PPSSPP version? On desktop, GPU matters for graphical issues.

PPSSPP Ver.：1.10.3-735
OS：Windows10（64-bit）Japanese
CPU：Ryzen7 3800X（8-core）
GPU：RADEON RX5700XT
Resolution：2560×1440
RAM：32GB

PPSSPP Ver.：1.10.3-735
OS：Android 9.0
DeviceName：SONY SO-02K / Xperia XZ1 Compact（Japan）
CPU：Snapdragon835（Octa-core）
GPU：Adreno 540
Resolution：720×1280
RAM：4GB
ROM：32GB
ExternalStrage：microSDXC 512GB

Dump files here. (I don't know whether it's necessary.)
GranTurismo.zip

[Windows10/OpenGL]

[Android9.0/OpenGL]

[Panderner]

Due to poor AMD's OpenGL Driver, you might be experience for bad performance for other games and emulators that uses OpenGL.

[hrydgard]

Sure it's not as fast as their Vulkan driver, but something bad with PPSSPP is clearly going on here. The AMD driver is not THAT slow.

[Panderner]

Citra has a lot of problems for AMD users due to Citra currently only supports OpenGL.

[nassau-tk]

Um...
Like a #13357 ?

[ANR2ME]

Even on Vulkan (Geforce) somestimes the FPS dropped from 60 to 47 for a few seconds in main menu, but not sure how to reproduce this, while D3D11 never had this slowdown.

[nassau-tk]

@ANR2ME

Really?
My PC never goes down FPS at Vulkan.
Um...

[ANR2ME]

@ANR2ME

Really?
My PC never goes down FPS at Vulkan.
Um...

It happened when Vulkan still have the flickering bug, but after the flicker issue got fixed recently i haven't noticed this slowdown anymore, or might be because i haven't tested it as often as before, since it's rare to happen.

[nassau-tk]

I tested on INTEL/NVIDIA GPU.

PPSSPP:v1.10.3-735
OpenGL
OS: Windows10(64-bit)
CPU: Intel i7-4770K
GPU: NVIDIA GeForce GTX750Ti
RAM:16GB
FPS Average: 60/60

OpenGL & D3D11
OS: Windows10(32-bit)
CPU: Intel Celeron G1610
GPU: Intel HD Graphic(On board Chip)
FPS Average: 40~43/60 (OpenGL)
FPS Average: 50~55/60 (D3D11)

[nassau-tk]

@hrydgard

Hi,This issue is not solved the Ryzen+RADEON below.

PPSSPP Ver.：1.10.3-928
OS：Windows10（64-bit）Japanese
CPU：Ryzen7 3800X（8-core）
GPU：RADEON RX5700XT
Resolution：2560×1440
RAM：32GB

Why closed this???

[Panderner]

@hrydgard

Hi,This issue is not solved the Ryzen+RADEON below.

PPSSPP Ver.：1.10.3-928
OS：Windows10（64-bit）Japanese
CPU：Ryzen7 3800X（8-core）
GPU：RADEON RX5700XT
Resolution：2560×1440
RAM：32GB

Why closed this???

@nassau-tk just because of Poor AMD's OpenGL driver for windows it might be a lots of slowdowns for most games even higher end AMD CPUs and GPUs. AMD's OpenGL driver for Linux is ok.

[hrydgard]

Really, this is slow on such a machine? sounds bizarre, but sure...

[nassau-tk]

I think it's a problem that don't move by this specification as the feeling that they're honest.

I recorded the Screen Movie.
Please, see the movie.

https://drive.google.com/file/d/1hqRE1EKzTjqHehprWSTwTUopCQce1ky1/view?usp=sharing

EDIT: If I should change some PPSSPP Setting then please advice for me.

[MojoJojoDojo]

Yeah the AMD GPUs OpenGL driver could be this bad sometimes..
It's not out of the question it's a driver issue.
I will just advise using other renderers like DX11 or Vulkan.
That's why I run JPCSP on Linux and some other emulators because it can get pretty bad if you use a mobile AMD GPU.

[nassau-tk]

Um...
How is @hrydgard thinking?
[It's shuold be solved or not.]

Open or Close?
I'll give a right of judgement for you.:smile:

[hrydgard]

I'll leave it open for now but not gonna look at it again for a while, marking it for 1.12 :)

[nassau-tk]

@hrydgard

OK!!