topic GPA with DirectX 11 - Frame Capture with Deferred Rendering in Intel® Graphics Performance Analyzers (Intel® GPA)

GPA with DirectX 11 - Frame Capture with Deferred Rendering

PhillipH — Tue, 08 Apr 2025 19:47:50 GMT

My DX11 app has recently stopped capturing pixels written to all Render Target Views - they are all rendering as black (despite being touched and not depth rejected). I've culled out all the code from my Pixel Shader so it only emits red colour - but no affect.

Once the deferred render pass is complete, I render semi-transparent pixels as a forward pass, and these render OK - despite using the same shader code.

This started happening about 5 weeks ago - could it be related to a GPA release ? If not, any idea what could be causing it ?

This is only evident in frame capture - trace and stream capture seems fine.

Re: GPA with DirectX 11 - Frame Capture with Deferred Rendering

PhillipH — Wed, 09 Apr 2025 09:37:54 GMT

Answering my own query:

I reworked the code to use DirectX11 Immediate Context for all rendering, and this enabled GPA to capture the frame successfully again. When I swap to using Deferred Contexts + Command Lists GPA no longer captures the frame. Its a workaround, but it works.

Re: GPA with DirectX 11 - Frame Capture with Deferred Rendering

sentientSpark_Intel — Thu, 10 Apr 2025 16:58:38 GMT

Hello PhillipH,

Thank you for your post, and we appreciate you bringing this frame capture issue to our attention.

We'd like to investigate this further. To accurately diagnose and address this problem, reviewing your application's source code would be very beneficial. This will allow us to better understand of the circumstances surrounding the crash.

If you can share the source code, please inform us of your preferred method for transferring the files. And feel free to highlight any particular sections of the code that you have mentioned.

We'd also like to ask for the system information from Graphics Monitor on your machine to help us better understand the context of this problem (accessible using the (i) icon in the top right hand corner of the screen, see picture below)

Thank you and looking forward to hearing from you.

Re: GPA with DirectX 11 - Frame Capture with Deferred Rendering

sentientSpark_Intel — Mon, 14 Apr 2025 22:37:49 GMT

Hey PhilippH,

I'm glad you were able to resolve your issue!

We like to document and investigate issues encountered in order to improve GPA. Reviewing your application's source code could help us track down why using Deferred Contexts and Command Lists caused undesired behavior in the Render Target View of Frame Analyzer. If this is something you are interested in sharing with us, please feel free to reply and/or send us an email at austin.eversole@intel.com.