BlueRoseNote/03-UnrealEngine/Rendering/RenderingPipeline/PSO Precache机制笔记.md

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title	date	excerpt	tags	rating
PSO Precache机制笔记	2025-02-08 20:42:16			⭐

前言

• 视频
  • Unreal Engine 5: Setup Precompiling Shaders (Bundled PSO's)
  • Unreal Engine 5: Show Number Of Compiling Shaders
• 文章
  • [UE5.3] PSO Cache&PreCache 源码阅读:https://zhuanlan.zhihu.com/p/679832250
  • [UE5.3] PSO Cache&PreCache 源码阅读(二):https://zhuanlan.zhihu.com/p/681803986
  • Unreal Engine 5.2 MeshPass拓展:https://zhuanlan.zhihu.com/p/671423486
  • 优化UE5的PSO卡顿：FileCache，PreCache和异步PSO https://zhuanlan.zhihu.com/p/1898646962561094034

BundledPSO

可以使用启动命令参数来清除PSO缓存。

• 启动参数
  • -logPSO
  • -clearPSODriverCache
• 命令行
  • r.ShaderPipelineCache.Enable=1

执行链

• FGraphEventArray UPrimitiveComponent::PrecachePSOs()
• void UMaterialInterface::InitDefaultMaterials()
• UMaterial::PrecachePSOs

UMaterial::PrecachePSOs => MaterialResource->CollectPSOs() => PrecacheMaterialPSOs() => PrecachePSOs() => CollectPSOs() => CollectPSOInitializers()

CollectPSOInitializers()

接口IPSOCollector::CollectPSOInitializers()

其他MeshProcessor实现