Setting Thread Count #60227

New Issue

Hunter M. Lundquist · 2019-01-06T09:38:41+01:00

2019-01-06 09:38:41 +01:00

System Information
Operating system: Windows 10 pro
Graphics card: GTX 1060 gigabyte

Version: 2.80 Date:2019-01-01 20:52 Hash: 4b7596ec91

Crash upon rendering an image after changing the thread count from Auto-Detect to fixed (from 16 to 18 threads)

Open a new scene, change rendering engine to cycles, change thread-count to fixed instead of Auto-Detect, 1ncrese value to anything greater than 16, hit f12 or render the image, hard crash.

**System Information** Operating system: Windows 10 pro Graphics card: GTX 1060 gigabyte Version: 2.80 Date:2019-01-01 20:52 Hash: 4b7596ec914e Crash upon rendering an image after changing the thread count from Auto-Detect to fixed (from 16 to 18 threads) Open a new scene, change rendering engine to cycles, change thread-count to fixed instead of Auto-Detect, 1ncrese value to anything greater than 16, hit f12 or render the image, hard crash.

Hunter M. Lundquist commented

2019-01-06 09:38:41 +01:00

Added subscriber: @HMLundquist

Sergey Sharybin commented

2019-01-06 12:14:13 +01:00

Added subscribers: @brecht, @Sergey

Sergey Sharybin self-assigned this 2019-01-06 12:14:13 +01:00

Sergey Sharybin commented

2019-01-06 12:14:13 +01:00

Will only happen when setting number of threads to something higher than the physical number of processor threads.

@brecht, i'm a bit on a split here. Shall we support this (and allow more than one Cycles thread on a CPU thread), or we'd better clamp number of threads in a pool? I kind of see benefits in both approaches.

Will only happen when setting number of threads to something higher than the physical number of processor threads. @brecht, i'm a bit on a split here. Shall we support this (and allow more than one Cycles thread on a CPU thread), or we'd better clamp number of threads in a pool? I kind of see benefits in both approaches.

Brecht Van Lommel commented

2019-01-06 12:28:38 +01:00

I think we can continue to allow a higher number of threads, but just not set any affinity for them (assuming that's the issue)?

Sergey Sharybin commented

2019-01-07 13:39:24 +01:00

@brecht, well, we need to set some affinity, to "decouple" it from the main thread (which is using node 0). Not a big deal to implement, was more wondering what is the best thing to do.

Will get it fixed after solving render issues for the studio.

@brecht, well, we need to set some affinity, to "decouple" it from the main thread (which is using node 0). Not a big deal to implement, was more wondering what is the best thing to do. Will get it fixed after solving render issues for the studio.

blender-admin commented

2019-01-11 15:01:54 +01:00

This issue was referenced by blender/cycles@4076b00be7

This issue was referenced by blender/cycles@4076b00be7f09c906c891b545d018f0d081b210c

blender-admin commented

2019-01-11 15:01:54 +01:00

This issue was referenced by c1dd74580e

This issue was referenced by c1dd74580ed8352b9f6c96d816a604ebb4f3c39d

Sergey Sharybin commented

2019-01-11 15:09:35 +01:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-01-11 15:09:35 +01:00

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Setting Thread Count #60227