WIP: all of my pending patches. #104456

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Alexander Gavrilov wants to merge 7 commits from angavrilov/blender:pending-combined into main

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All of my pending and WIP patches combined into a single build.

DO NOT MERGE. No review is requested here.

All of my pending and WIP patches combined into a single build. DO NOT MERGE. No review is requested here.
Alexander Gavrilov added 1 commit 2023-02-08 09:20:02 +01:00
d8bb0d329c Subdivision Surface: fix a serious performance hit when mixing CPU & GPU.
Subdivision surface efficiency relies on caching pre-computed topology
data for evaluation between frames. However, while eed45d2a23
introduced a second GPU subdiv evaluator type, it still only kept
one slot for caching this runtime data per mesh.

The result is that if the mesh is also needed on CPU, for instance
due to a modifier on a different object (e.g. shrinkwrap), the two
evaluators are used at the same time and fight over the single slot.
This causes the topology data to be discarded and recomputed twice
per frame.

Since avoiding duplicate evaluation is a complex task, this fix
simply adds a second separate cache slot for the GPU data, so that
the cost is simply running subdivision twice, not recomputing topology
twice.

To help diagnostics, I also add a message to show when GPU evaluation
is actually used to the modifier panel. Two frame counters are used
to suppress flicker in the UI panel.

Differential Revision: https://developer.blender.org/D17117
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Package build started. Download here when ready.

Package build started. [Download here](https://builder.blender.org/download/patch/PR104456) when ready.
Alexander Gavrilov force-pushed pending-combined from 71a181729a to f003f3473a 2023-02-08 13:51:20 +01:00 Compare
Alexander Gavrilov force-pushed pending-combined from f003f3473a to 71140b8cc6 2023-02-09 09:43:03 +01:00 Compare
Alexander Gavrilov force-pushed pending-combined from 71140b8cc6 to e65480ece8 2023-02-11 15:38:34 +01:00 Compare
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Alexander Gavrilov force-pushed pending-combined from e7da57ec2b to 2da85e205e 2023-12-25 17:41:26 +01:00 Compare
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Package build started. Download here when ready.

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Package build started. Download here when ready.

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Package build started. Download here when ready.

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Alexander Gavrilov force-pushed pending-combined from 478cb2c33f to 390349fa1c 2024-02-05 20:20:15 +01:00 Compare
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Package build started. [Download here](https://builder.blender.org/download/patch/PR104456) when ready.
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