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Maniphest T70766

eevee performance drop with node tree in 2.81
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Description

System Information
Operating system: Linux-4.13.10-041310-generic-x86_64-with-debian-stretch-sid 64 Bits
Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.67

Blender Version
Broken: version: 2.81 (sub 14), branch: master, commit date: 2019-10-10 23:31, hash: rBf9cc51788bd6
Worked: (optional)

Short description of error
Maybe related to this recent issue, I have another node tree that seems to affect eevee performance quite significantly.

eevee_performance_drop_with_eevee.blend356 KBDownload

Exact steps for others to reproduce the error

  • open the attached blend file in 2.80 and drag any of the principled shader's inputs, like metallic or roughness, it should be smooth
  • repeat in a recent 2.81 build, it should be sluggish

Revisions and Commits

rB Blender
rB32f0bb052308 Fix T70766 EEVEE: Performance drop with node tree in 2.81

Related Objects

Event Timeline

MACHIN3 (MACHIN3) created this task.Oct 12 2019, 8:39 PM
ThinkingPolygons (ThinkingPolygons) added a subscriber: ThinkingPolygons (ThinkingPolygons).Oct 12 2019, 9:34 PM

Confirmed. :(

noki paike (amonpaike) added a subscriber: noki paike (amonpaike).Oct 13 2019, 12:33 AM

I also confirm on the radeon

Philipp Oeser (lichtwerk) assigned this task to Clément Foucault (fclem).Oct 14 2019, 10:33 AM
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 50.
Philipp Oeser (lichtwerk) added a project: Eevee.
Philipp Oeser (lichtwerk) added subscribers: Clément Foucault (fclem), Philipp Oeser (lichtwerk).

Can confirm a performance difference.
@Clément Foucault (fclem): this expected? (I know there's changes to bump and tree traversal, but this also seems to affect trees not even connected to normal slot... but I guess the traversal runs regardless...)

Clément Foucault (fclem) added a comment.Oct 15 2019, 2:40 PM

Well I guess it's a duplicate of T70325 which has already been resolved. Feel free to reopen if that's still a problem. Note that the new bump mapping increase the shader/nodetree complexity so it will never be on the same level as 2.80.

Clément Foucault (fclem) closed this task as a duplicate of T70325: sudden significant performance drop with Eevee and parallax node tree .Oct 15 2019, 2:40 PM
MACHIN3 (MACHIN3) added a comment.EditedOct 15 2019, 2:58 PM

T70325 was also reported by me and seems to be resolved to me. This one here is not however. It also doesn't seem like it is related to bump, unless I misunderstand you. I can pipe the node tree into the roughness slot as well and it's just as sluggish.

It doesn't look like i can reopen this task, but I think it's very unfortunate if this slow down can't be resolved. I'll see if I can pin point the issue to any specific node or node combination in the tree.

Philipp Oeser (lichtwerk) added a comment.Jan 15 2020, 6:08 PM

@MACHIN3 (MACHIN3) : reading your previous comment, just checking if this is still an issue in fresh builds?

MACHIN3 (MACHIN3) added a comment.EditedJan 16 2020, 2:23 PM

@Philipp Oeser (lichtwerk) Yep, still happening in rB689a873029b9 - todays 2.82 beta, and also in rBeca8bae6718d - todays 2.83 alpha. Thanks for following up!

Philipp Oeser (lichtwerk) reopened this task as Needs Triage.Jan 16 2020, 2:26 PM
Clément Foucault (fclem) closed this task as Resolved by committing rB32f0bb052308: Fix T70766 EEVEE: Performance drop with node tree in 2.81.Jan 16 2020, 3:57 PM
Clément Foucault (fclem) added a commit: rB32f0bb052308: Fix T70766 EEVEE: Performance drop with node tree in 2.81.
Philipp Oeser (lichtwerk) mentioned this in T71201: eevee/blender freezing for a few seconds when renaming a few materials via python.Jan 26 2020, 7:13 PM
Clément Foucault (fclem) edited projects, added EEVEE & Viewport; removed Eevee.Jun 19 2020, 10:07 PM