Vulkan better performances than OpenGL (exynos)

02-24-2019, 11:54 PM #1

Hello, I am running a Galaxy S8 on latest Pie with updated Mali drivers. I tried using OpenGL and Vulkan with Mutlithreading and it appear that Vulkan have WAY better performances (+20fps) than OpenGL. It is normal ? Is there anything to do on Exynos CPU for OpenGL to work correctly ?
Also I noticed that "enabling Skip EFB Access from CPU" increase my performance by around 20 fps ! But I can't use the in-game IR. Is there any way to use this option and keep IR support ?

Thanks Big Grin

**JosJuice** · 02-25-2019, 12:05 AM #2

(02-24-2019, 11:54 PM)jojos38 Wrote: I tried using OpenGL and Vulkan with Mutlithreading and it appear that Vulkan have WAY better performances (+20fps) than OpenGL. It is normal ?

Probably. Doesn't wound weird, at least.

(02-24-2019, 11:54 PM)jojos38 Wrote: Is there anything to do on Exynos CPU for OpenGL to work correctly ?

Is it not working correctly right now? (Other than having lower performance)

(02-24-2019, 11:54 PM)jojos38 Wrote: Also I noticed that "enabling Skip EFB Access from CPU" increase my performance by around 20 fps ! But I can't use the in-game IR. Is there any way to use this option and keep IR support ?

No.

02-25-2019, 12:07 AM #3

I see, thank you

**JMC47** · 02-26-2019, 02:19 AM #4

The CPU reads the EFB (framebuffer) in order to see what the pointer is hovering over. So you can see why disabling that feature breaks the pointer.

02-26-2019, 02:33 AM #5

(02-26-2019, 02:19 AM)JMC47 Wrote: The CPU reads the EFB (framebuffer) in order to see what the pointer is hovering over. So you can see why disabling that feature breaks the pointer.

It cost a lot of performance :/

**JMC47** · 02-26-2019, 02:38 AM #6

Yeah, it's expensive for the CPU to access the framebuffer. There isn't much we can do about that except wait for devices to get faster to it's not a problem.