CUDA Error after increasing Max Samples

[tobiasroesli]

Hello,

I got some CUDA Problems which has something to do with the Max subdivs in the Image Sampler

If I setup 16 Max Samples it works, If I switch to for Example 96 Max Samples it stops rendering after maybe 1 minute (I quess it takes to long to calculate for a Bucket and then it somehow crashes.)
Sometimes the Error Message appears:
// Error: line 1: V-Ray : D:cgrepovraysdksamplesvray_plugins t_private t_opencl_pri(202 : CUDA error 700

If I try to re-render it says:
// Warning: V-Ray : initDevices() failed. Please check that your system has compatible GPU devices installed

The "Select devices for V-Ray GPU"-App shows all the GPU's correct

I send the Scene to the Support.

I use:
Vray Next for Maya, update 2 (v4.30.00 from Nov 18 2019)
Autodesk Maya 2018.6

Nvidia Driver:
[Display]
Operating System: Windows 10 Pro, 64-bit
DirectX version: 12.0
GPU processor: GeForce GTX 1080 Ti
Driver version: 441.28
Driver Type: Standard
Direct3D API version: 12
Direct3D feature level: 12_1
CUDA Cores: 3584
Core clock: 1569 MHz
Memory data rate: 11.01 Gbps
Memory interface: 352-bit
Memory bandwidth: 484.44 GB/s
Total available graphics memory: 76736 MB
Dedicated video memory: 11264 MB GDDR5X
System video memory: 0 MB
Shared system memory: 65472 MB
Video BIOS version: 86.02.39.00.23
IRQ: Not used
Bus: PCI Express x16 Gen3
Device ID: 10DE 1B06 85EA1043
Part Number: G611 0050
GPU processor: GeForce GTX 1080 Ti
Driver version: 441.28
Driver Type: Standard
Direct3D API version: 12
Direct3D feature level: 12_1
CUDA Cores: 3584
Core clock: 1569 MHz
Memory data rate: 11.01 Gbps
Memory interface: 352-bit
Memory bandwidth: 484.44 GB/s
Total available graphics memory: 76736 MB
Dedicated video memory: 11264 MB GDDR5X
System video memory: 0 MB
Shared system memory: 65472 MB
Video BIOS version: 86.02.39.00.23
IRQ: Not used
Bus: PCI Express x16 Gen3
Device ID: 10DE 1B06 85EA1043
Part Number: G611 0050

[Components]

nvui.dll 8.17.14.4128 NVIDIA User Experience Driver Component
nvxdplcy.dll 8.17.14.4128 NVIDIA User Experience Driver Component
nvxdbat.dll 8.17.14.4128 NVIDIA User Experience Driver Component
nvxdapix.dll 8.17.14.4128 NVIDIA User Experience Driver Component
nvCplUIR.dll 8.1.940.0 NVIDIA Control Panel
nvCplUI.exe 8.1.940.0 NVIDIA Control Panel
nvWSSR.dll 26.21.14.4128 NVIDIA Workstation Server
nvWSS.dll 26.21.14.4128 NVIDIA Workstation Server
nvViTvSR.dll 26.21.14.4128 NVIDIA Video Server
nvViTvS.dll 26.21.14.4128 NVIDIA Video Server
nvLicensingS.dll 6.14.14.4128 NVIDIA Licensing Server
nvDispSR.dll 26.21.14.4128 NVIDIA Display Server
NVMCTRAY.DLL 26.21.14.4128 NVIDIA Media Center Library
nvDispS.dll 26.21.14.4128 NVIDIA Display Server
nvDevToolS.dll 26.21.14.4128 NVIDIA 3D Settings Server
PhysX 09.19.0218 NVIDIA PhysX
NVCUDA.DLL 26.21.14.4128 NVIDIA CUDA 10.2.95 driver
nvGameSR.dll 26.21.14.4128 NVIDIA 3D Settings Server
nvGameS.dll 26.21.14.4128 NVIDIA 3D Settings Server




Cheers
Tobias

[tobiasroesli]

I did some more research, I downgraded Graphic Card Drivers, Vray Versions and so on. The only thing which made it better was to switch from Brute Force GI to Light Cache. But still it stops rendering after a while...

[tobiasroesli]

I was able to isolate my Problem.

Looks like the "Additive mode" in the VrayBlendMaterial makes the Problem.

[tanya_to]

Hello! Thank you for reporting this. Could you send the problematic scene to tanya.todorova@chaosgroup.com?

[hermit.crab]

Thank you for the provided files. I am reproducing the issue and logging it (Bug-tracker id: VGPU-4390) for investigation.

[tobiasroesli]

Hi Aleksandar, thank you very much. Looking forward to this fix

Cheers

[tobiasroesli]

Hello, I want to ask how it's looking with the Progress of this Bug fix? It's something I use often...

[hermit.crab]

Hello, I want to ask how it's looking with the Progress of this Bug fix? It's something I use often...

Sorry to say the crash is not yet fixed. I cannot give a specific time frame for it's resolving, however, I'll inform you when there is movement on the case.

[tobiasroesli]

Thanks

Cheers
Tobias