big memory leak in cycles in OpenCL #48410

New Issue

mathieu menuet · 2016-05-12T09:37:14+02:00

mathieu menuet commented

2016-05-12 09:37:14 +02:00

System Information
Win7 x64, AMD R9280 with 16.3.2

Blender Version
Broken: 8de3303

Short description of error
Cycles leak memory while rendering animations

Exact steps for others to reproduce the error
Render the default scene with cycles an GPU/OpenCL as animation, and watch in task manager Blender's memory usage. The 250 frames are enough to see the problem. Set the samples to 1 to speed up.

**System Information** Win7 x64, AMD R9280 with 16.3.2 **Blender Version** Broken: 8de3303 **Short description of error** Cycles leak memory while rendering animations **Exact steps for others to reproduce the error** Render the default scene with cycles an GPU/OpenCL as animation, and watch in task manager Blender's memory usage. The 250 frames are enough to see the problem. Set the samples to 1 to speed up.

mathieu menuet commented

2016-05-12 09:37:14 +02:00

Changed status to: 'Open'

mathieu menuet commented

2016-05-12 09:37:14 +02:00

Added subscriber: @bliblubli

mathieu menuet commented

2016-05-12 09:37:54 +02:00

Start blender with factory settings of course to see it's not due to an addon or custom layout.

Thomas Dinges commented

2016-05-12 13:29:17 +02:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2016-05-12 13:29:17 +02:00

Does it happen with 2.77a as well?

mathieu menuet commented

2016-05-12 17:36:43 +02:00

Yes it does, also on 2.76. So it's an old leak.

mathieu menuet commented

2016-05-12 17:41:38 +02:00

Edit: was wrong, forgot to set on GPU after a factory start, rendering at 32x32 resolution gives a 4GB leak in 10sec after rendering 250 frames of the default cube.

Sergey Sharybin commented

2016-05-17 11:21:25 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-05-17 11:21:25 +02:00

Can't confirm on Linux+Nvidia card, but will test Windows+AMD card shortly.

Sergey Sharybin commented

2016-06-01 14:25:25 +02:00

I can reproduce the issue on Windows, but currently not sure what exactly causes the leak. It's almost like driver caches some stuff in application and never frees it, even when closing the whole OpenCL context. Would need to do some deeper investigation.

Sergey Sharybin commented

2016-06-08 14:56:53 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2016-06-08 14:56:53 +02:00

Sergey Sharybin self-assigned this 2016-06-08 14:56:53 +02:00

Sergey Sharybin commented

2016-06-08 14:56:53 +02:00

Reproduced the issue with much simpler application - [x]. Number of iterations a bit high there because amount of leak depends on kernel size. I've reported this issue to AMD and hopefully they'll acknowledge it and resolve. We can't fix it from Blender side anyway.

So thanks for the report, but afraid at this point we can't do anything.

https://github.com/Nazg-Gul/opencl-memleak-test

Reproduced the issue with much simpler application - [x]. Number of iterations a bit high there because amount of leak depends on kernel size. I've reported this issue to AMD and hopefully they'll acknowledge it and resolve. We can't fix it from Blender side anyway. So thanks for the report, but afraid at this point we can't do anything. - [x] https://github.com/Nazg-Gul/opencl-memleak-test

mathieu menuet commented

2016-06-16 20:43:06 +02:00

Thank you Sergey. Can you report here when it's fixed or give a link to the AMD thread?

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big memory leak in cycles in OpenCL #48410