Why can't I see the 'Top Stall' and 'Live Register' sections in the shader source?

Developer Tools Nsight Graphics
1

I am currently using the latest version of Nsight (2025.5.0), but the “Top Stall” and “Live Register” items do not appear. When I tested with a sample project, the result was the same. I remember using these features before, so I checked previous versions: in 2025.4, “Live Register” is missing, and in 2025.3, both items are visible.

image
image1221×159 16 KB

2025.5

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image1488×175 22 KB

.4

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image1360×249 20.8 KB

.3

And one difference I noticed is that the “languages” items have decreased as the version was updated.
2025.3

image
image188×138 2.65 KB

~2025.4

image

Why would this happen?

DRIVER 591.74

4070 SUPER

Windows 11 Pro 24H2
Vulkan

2

Hi dave8965,

Thank you for using Nsight Graphics and providing your feedback. We are sorry for any inconvenience you have encountered.

I can see the “Top Stall” missing in my machine, but the “Live Register” always works here. Could you please provide a simple example that would allow us to reproduce the issue? This will help us in investigating and resolving the problem more efficiently.

Thanks
An

3

image

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The same issue persisted even when using the included vk_meshlet_cadscene. Could this be a problem with my installation environment?

4

Hi dave8965,

Thanks for your reply. We also do some check on our side, it seems the “Top Stall missing” is a known issue and already has been fixed, the next release of Nsight Graphics will have that.

“Live Register” always works fine in my local machine. Does this happen on vk_meshlet_cadscene (the bundled sample within Nsight Graphics) in your machine?

Thanks
An

5

The vk meshlet scene in my previous response was a sample scene (bundle scene) found in the Help menu.

6

Hi Dave8965,

That’s really weird since Live Register looks OK in my test machine (591.xx + RTX 4080 + Ngfx 2025.5). What’s your detail steps to get the empty ‘Live Registers’, I tried in both Frame Debugger and GPUTrace activity and they look both fine.

Thanks
An

7

I don’t see either frame debugger or gpu trace on my device. Maybe it’s my device problem.

8

I’m also facing the same issue, with 2025.5 the Live registers column is empty but with 2025.3 it isn’t.

Setup:
Windows 11 x64
RTX PRO 4000 Blackwell
591.59
Vulkan app

9

Hi guys,

Thanks for your patient, I finally find the key for reproduce the missing of ‘Live Registers’ column, and I will do some internal check.

Thanks
An

10

Hi guys,

The missing of ‘Live Registers’ column will also be fixed in the coming release of Nsight Graphics.

Thanks
An

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