NSight Graphics 3D Texture Bug (Vulkan)

Development Tools Nsight Graphics
1

With Vulkan on Ubuntu, NSight Graphics has issues with a corrupted view/mapping (or some other problem) of the underlying memory on 3D RGBA floating point images.

The problem doesn’t happen when the image is single-channel or 2D. The issue appears to not be a problem on the first (xy) plane in the image, but affects the 2d planes where the z-coordinate is higher than 0.

After a CmdClearImage, NSight sees garbled memory along with an incorrect visualization of the texture in the UI. I’ve copied the contents of the image into a host-visible buffer for a manual inspection, and the whole image was cleared properly to rgba(0.5,0.5,0.5,0.5).

I also ran it under RenderDoc, which did not have this problem.

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2

Hello,
Thank you for using Nsight Graphics and I’m sorry you ran into this problem. I’m contacting the engineering team to have a look at your issue and I’ll let you know something afterwards. By the way which version of Nsight Graphics were you using?
Regards,

3

Hello again,
Can you also share with me which version of Ubuntu and which GPU driver version you were using in addition to the Nsight Graphics version? If you have a repro that would be great as well. You can send those details to me directly at dwoods@nvidia.com if you like.
Regards,

4

Thanks.

OS: Ubuntu 22.10
Tested with NSight Graphics versions:

  • 2022.6.1.0
  • 2022.7.0.0

I’ll see if I can send an MRE, but basically it’s just:

  • Create a 3D image
  • Transition it to GENERAL
  • vkClearImage
  • More or less empty presentation logic so that nsight can actually grab a frame
5

Hello,

If you can provide an MRE that would be greatly appreciated. You can communicate with me at dwoods@nvidia.com if that works better for you.
Regards,