Possible memory leak #55157

New Issue

Artur · 2018-05-22T21:01:54+02:00

Artur commented

2018-05-22 21:01:54 +02:00

System Information
Windows 10 home 64b
Ryzen 2700x
32GB RAM DDR4 GoodRam 3000Mhz
SSD Samsung 960PRO 250 GB
MSI Gaming X GeForce 1060 6GB , driver ver. 391.35 from nVidia

Blender Version
Broken: 2.79 master branch, 2018-05-15 17:37, hash: 4461be1, branch: 2.8
Worked: (optional)

Possible memory leak. Very different render times with no changes to scene.

Exact steps for others to reproduce the error
With scenes whose memory usage is close to the memory capacity of my video card (4.5GB of my 6 GB) I got very different render times with same settings with hybrid rendering.
I was trying to get best tiles size setting for new scene of archviz for my clients. I opened scene, set tiles size to 32x32 and I got render time of 42 minutes. Then I changed tile size to 16 and I hit render button - 1 hour 21 minutes. Then by accident I used again 32x32 instead of 64x64 and I got 1 hour and 21 minutes render time - almost twice the time of first render. Nothing changed - camera, samplec etc. I can reproduce it with every scene with 4,5GB or more of memory peak.

**System Information** Windows 10 home 64b Ryzen 2700x 32GB RAM DDR4 GoodRam 3000Mhz SSD Samsung 960PRO 250 GB MSI Gaming X GeForce 1060 6GB , driver ver. 391.35 from nVidia **Blender Version** Broken: 2.79 master branch, 2018-05-15 17:37, hash: 4461be1, branch: 2.8 Worked: (optional) Possible memory leak. Very different render times with no changes to scene. **Exact steps for others to reproduce the error** With scenes whose memory usage is close to the memory capacity of my video card (4.5GB of my 6 GB) I got very different render times with same settings with hybrid rendering. I was trying to get best tiles size setting for new scene of archviz for my clients. I opened scene, set tiles size to 32x32 and I got render time of 42 minutes. Then I changed tile size to 16 and I hit render button - 1 hour 21 minutes. Then by accident I used again 32x32 instead of 64x64 and I got 1 hour and 21 minutes render time - almost twice the time of first render. Nothing changed - camera, samplec etc. I can reproduce it with every scene with 4,5GB or more of memory peak.

Artur commented

2018-05-22 21:01:54 +02:00

Added subscriber: @azjarosz

Bastien Montagne commented

2018-07-22 13:11:47 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2018-07-22 13:11:47 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2018-07-22 13:11:47 +02:00

Bastien Montagne self-assigned this 2018-07-22 13:11:47 +02:00

Bastien Montagne commented

2018-07-22 13:11:47 +02:00

We’d need much, much more info to investigate this, provided there is indeed any issue here. The GPU is not only used for rendering, it still has to draw the screen with blender in it. And drivers can also be part of the problem here…
So am sorry, but will archive the report for now.

We’d need much, much more info to investigate this, provided there is indeed any issue here. The GPU is not only used for rendering, it still has to draw the screen with blender in it. And drivers can also be part of the problem here… So am sorry, but will archive the report for now.

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Possible memory leak #55157