does dlss rr support dx11?

[jiayev]

I've been trying to add rr into our project, which we had already done dlss in dx11 and it runs fine. But when I try to switch to rr, it just gives me a freeze. Log shows a DXGI_ERROR_DEVICE_HUNG, along with:

[18:27:29.642] [96284] [W] [StreamlineSDK] commonEntry.cpp:370[getTag] Tags are valid only until Present(). Invalidating the hanging tag 27 for viewport 0 (created at frame: 13566, current frame: 13568)
[18:27:29.642] [96284] [W] [StreamlineSDK] commonEntry.cpp:370[getTag] Tags are valid only until Present(). Invalidating the hanging tag 29 for viewport 0 (created at frame: 13566, current frame: 13568)

Since other stuff like dlss, nis run fine, I wonder if it's just rr not supporting dx11.
When I tried dx12 interop, rr ran successfully. But interop is too costly.

[doodlum]

I cannot get this to work either. NGX has support for the D3D11 path but it looks like maybe it was never tested. It hangs internally. DeepDVC does work so this is the only NGX model that fails.

[jake-nv]

SL/NGX definitely support DX11. I looked through the RR Programming Guide- which is rather vague on the topic (although it mentions the existence of NGX_D3D11_CREATE_DLSSD_EXT, etc.).
I asked the RR team and they said it should work "in theory", but we don't actively verify it because we don't have a DX11/PT use-case.

It looks like we actively disable it with DX11 in the UE plugin and it causes "instability" if forcefully enabled.

Basically, it sounds like it doesn't work. I'll file a bug to either look into this and/or clarify it in documentation.

nvbug: 5571487