Very Slow Viewport with Threadripper #54500

New Issue

M. Utku Altinkaya · 2018-04-03T00:43:37+02:00

M. Utku Altinkaya commented

2018-04-03 00:43:37 +02:00

System Information
Ryzen Threadripper 1950x
Rx Vega 64
Windows 10
Ubuntu 17

Blender Version
2.79b

Short description of error
Very low frame rate on viewport with more than few hundred objects

Exact steps for others to reproduce the error
Create a node based material, with a single texture, add 400+ objects using the same material. Viewport is around 15 fps or lower(used renderdoc to verify fps). Neither CPU nor GPU have high load.

blend file: planes.blend

Bench marked the system, everything seems normal, to make sure nothing is wrong with Windows, also used Ubuntu to repeat the same problem.

Also downloaded 2.80, and it works perfectly with the same scene.

**System Information** Ryzen Threadripper 1950x Rx Vega 64 Windows 10 Ubuntu 17 **Blender Version** 2.79b **Short description of error** Very low frame rate on viewport with more than few hundred objects **Exact steps for others to reproduce the error** Create a node based material, with a single texture, add 400+ objects using the same material. Viewport is around 15 fps or lower(used renderdoc to verify fps). Neither CPU nor GPU have high load. blend file: [planes.blend](https://archive.blender.org/developer/F2579091/planes.blend) Bench marked the system, everything seems normal, to make sure nothing is wrong with Windows, also used Ubuntu to repeat the same problem. Also downloaded 2.80, and it works perfectly with the same scene.

M. Utku Altinkaya commented

2018-04-03 00:43:37 +02:00

Added subscriber: @utkualtinkaya

Brecht Van Lommel commented

2018-04-03 04:10:53 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2018-04-03 04:10:53 +02:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2018-04-03 04:10:53 +02:00

Brecht Van Lommel self-assigned this 2018-04-03 04:10:53 +02:00

Brecht Van Lommel commented

2018-04-03 04:10:53 +02:00

Blender 2.80 will be the next major Blender release, so if performance is better there we consider this issue to be resolved. Improving viewport performance like this is one of the reasons the whole viewport is being rewritten in 2.80.

M. Utku Altinkaya commented

2018-04-03 09:37:56 +02:00

@brecht I've tested on other hardware. The same scene works without problems on 2400G APU and a Macbook pro with an iGPU. both are slower than TR in terms of single thread and multi thread performance. Besides while 2.80 have no performance issues, it shows still very high utilization for the GPU. There might be some other issue under this viewport problem.

Brecht Van Lommel commented

2018-04-03 14:13:50 +02:00

I understand there may be a bug in 2.79, but we're not optimizing that version further since we're not going to be releasing it. Performance can be further improved in 2.80 and there are plans to do that, but we have plenty of files to test performance on and don't need to track a bug report for each case.

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Very Slow Viewport with Threadripper #54500