Error when denoising (Optix) large image #102515
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Reference: blender/blender#102515
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System Information
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090, 3060 Driver 522.30
Blender Version
Broken: version: 3.3.1, branch: master, commit date: 2022-10-04 18:35, hash:
b292cfe5a9
Worked: Never (3.0 failed, 2.90 did not start rendering)
Short description of error
Denoising large image will fail and may result in crash.
Shortened log:
Exact steps for others to reproduce the error
#102515.blend
Open file and render image.
Added subscriber: @ai25395
Added subscriber: @PratikPB2123
Added subscriber: @OmarEmaraDev
Blender already splits the render into smaller tiles that are denoised separately. So if it is still running out of memory, then either that logic is wrong or memory is too little for that scene.
Don't have an Nvidia GPU to test myself, so I will leave that to someone else.
Thanks for reply.
I compared the vram use in two conditions(at percentage scale=600%,tile size=2G,with optix denoiser on or not).
When optix denoiser is on,the vram occupied is up to 14.4G(starts from 6.7G and increases to 14.4G instantly when begining to denoise).But when it's off,only 6.2G vram is used from begining to the end.
As you say@Omar Emara,maybe it just runs out of memory.But it seems like setting the tile size in performance does not affect the vram use of denoising but just affect rendering.I mean the optix denoiser does not work in 'tiles mode'. Because I can see from the rendering output window that when all the tiles are rendered over,results of them are read from the disk buffer and then the denoiser begin to work on the whole image.
This is the info sequence showed in the 'blender render' window with optix denoiser on:
Rendered 1/21 tiles,Samples 1/100 ---> Reading full buffer from disk ---> Denoising --->Finishing.
And when denoiser is off:
Rendered 1/21 tiles,Samples 1/100 ---> Reading full buffer from disk --->Finishing.
OptiX uses its own tiling strategy, it doesn't use the tile sizes in the performance panel. It is also done using an OptiX utility, so Blender still reads the whole buffer as far as I know.
Added subscriber: @iss
Changed status from 'Needs Triage' to: 'Needs User Info'
I was able to reproduce crash at 700%, not at 600% scale. In both cases VRAM did swap to RAM. On 3090 I would expect this to work.
Can you upload debug log?
I did meet the crash at 700%,not 600%.The bug report I describe in this task at first is generated when RAM is 16G.Now I upgrade RAM to 40G,the crash still happens at 700% scale though the debug report content has changed.Here blender_debug_report.txt and blender_system_info.txt are attached.
blender_debug_output.txt
blender_system_info.txt
line
Illegal address in CUDA queue synchronize (film_convert_float3 filter_guiding_preprocess)
is same error I've got. Thanks for logs.An optix denoise bug in Scene-Render_properties-Sampling-Render-Denoiseto Error when denoising (Optix) large imageChanged status from 'Needs User Info' to: 'Confirmed'