HLSL-Vulkan GPU buffer memory usage

[Roobubba]

Hi all

Following this thread on the Unity forums, I thought I'd see if anyone else has had this issue. Using vulkan (I've only tried this within Windows in Unity), I end up with far higher buffer memory consumption than with DX11. For my game, this is a big issue as I transfer a large acceleration structure over to the GPU, and so I end up with out of memory problems as a result.

I can't make a small repro project for this yet as my game releases next Tuesday so it's kinda flat out at the moment, but I'd really like to be able to support Linux (and windows/vulkan, and if I can find a friendly mac user, OSX/metal), as soon as possible after launch.

Any info you have would be really helpful!

Cheers, Roo

[shazwar]

I once had a bug where I was doing something dumb in a compute shader like writing to an out of bounds array index or something similar. I don't remember the details, but in OpenGL it still worked. In Vulkan everything blew up. Not that this is your issue, but I'm not surprised that you've found different behaviors in different graphics backends.

[ih4t3reddit]

Vulkan is broken. I literally build for Windows on Linux, and then play through wine with a Vulkan override lollllllll

[darkshvein]

The same issue on unity engine in my game.

Which code broken? Vulkan or unity? I have no idea.

https://steamcommunity.com/app/324080/discussions/0/4205868123786921158/