Slow tiles in hybrid CPU+GPU mode #62885

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opened 2019-03-23 22:31:24 +01:00 by 0x37a2fc · 5 comments

0x37a2fc commented

2019-03-23 22:31:24 +01:00

System Information
Operating system: Arch Linux x86_64 Linux 5.0.3-arch1-1-ARCH
Graphics card: Nvidia GTX 960
CPU: i5-2500k

Blender Version
Broken: 2.79 2c0c1f494d makepkg 2018-12-22 14:10

Slow tiles in hybrid CPU+GPU mode

Start blender, switch to cycles & GPU compute
Open 'system' tab in preferences
Set ticks on CPU and GPU in CUDA tab of 'cycles compute device' section
Add 3-subdiv icosphere and hit render

All tiles will be rendered except two. You will see this for a while when they render:

Cancelling during this process is also slow.

If you uncheck CPU or GPU in CUDA everything goes well. Also CPU compute works well.

Simple blend used:
untitled1.blend

**System Information** Operating system: Arch Linux x86_64 Linux 5.0.3-arch1-1-ARCH Graphics card: Nvidia GTX 960 CPU: i5-2500k **Blender Version** Broken: 2.79 2c0c1f494dcf makepkg 2018-12-22 14:10 Slow tiles in hybrid CPU+GPU mode 1) Start blender, switch to cycles & GPU compute 2) Open 'system' tab in preferences 3) Set ticks on CPU and GPU in CUDA tab of 'cycles compute device' section 4) Add 3-subdiv icosphere and hit render All tiles will be rendered except two. You will see this for a while when they render: ![2019-03-24-032156_1321x787_scrot.png](https://archive.blender.org/developer/F6872275/2019-03-24-032156_1321x787_scrot.png) Cancelling during this process is also slow. If you uncheck CPU or GPU in CUDA everything goes well. Also CPU compute works well. Simple blend used: [untitled1.blend](https://archive.blender.org/developer/F6872276/untitled1.blend)

0x37a2fc commented

2019-03-23 22:31:24 +01:00

Author

Added subscriber: @0x37a2fc

Added subscriber: @0x37a2fc

Brecht Van Lommel commented

2019-03-25 12:19:11 +01:00

Owner

Added subscriber: @brecht

Added subscriber: @brecht

Brecht Van Lommel commented

2019-03-25 12:19:11 +01:00

Owner

I can't reproduce this, please try the latest build from:
https://builder.blender.org/download/

I can't reproduce this, please try the latest build from: https://builder.blender.org/download/

Brecht Van Lommel commented

2019-04-04 05:48:13 +02:00

Owner

Changed status from 'Open' to: 'Archived'

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-04-04 05:48:13 +02:00

Brecht Van Lommel self-assigned this 2019-04-04 05:48:13 +02:00

Brecht Van Lommel commented

2019-04-04 05:48:13 +02:00

Owner

Closing due to lack of information to investigate the issue, we can reopen if more information is provided.

Closing due to lack of information to investigate the issue, we can reopen if more information is provided.

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Reference: blender/blender#62885

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