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[Perf] (DirectVulkan): reuse pipelines across per-chunk buffers and skip redundant pipeline binds

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swung0x48
2026-07-30 05:01:46 -04:00
parent 0b344792cc
commit a12068df52
4 changed files with 98 additions and 41 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.h
+24 -8
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@@ -455,14 +455,30 @@ namespace MobileGL::MG_Backend::DirectVulkan {
// gather + synthetic vertex-input rebuild + payload hash + lookup) when the full pipeline
// state is unchanged from the previous draw. The key provably covers every pipeline field.
// Reset per-frame and on pipeline destruction so the cached handle can never dangle.
Bool m_lastPipelineValid = false;
GLenum m_lastPipelineMode = 0;
Uint64 m_lastPipelineProgramHash = 0;
Uint64 m_lastPipelineVertexInputHash = 0;
Uint64 m_lastPipelineRenderPassHash = 0;
Uint m_lastPipelineRenderStateVersion = 0;
ProgramFactory::CompileOptionFlags m_lastPipelineTransformFlags = {};
VkPipeline m_lastPipelineResult = VK_NULL_HANDLE;
// Small N-way pipeline-resolution memo (round-robin replacement). A
// single-entry memo thrashed on draw sequences that alternate a few
// pipelines (GUI text/quad program ping-pong), paying the full
// payload-hash lookup per draw; eight entries cover such working sets
// while keeping the hit path a trivial linear scan.
struct PipelineMemoEntry {
GLenum mode = 0;
Uint64 programHash = 0;
Uint64 vertexInputHash = 0;
Uint64 renderPassHash = 0;
Uint renderStateVersion = 0;
ProgramFactory::CompileOptionFlags transformFlags = {};
VkPipeline pipeline = VK_NULL_HANDLE;
};
static constexpr Uint32 kPipelineMemoSize = 8;
PipelineMemoEntry m_pipelineMemo[kPipelineMemoSize];
Uint32 m_pipelineMemoCount = 0;
Uint32 m_pipelineMemoNext = 0;
// Drops every memoized pipeline handle. Required at command-buffer
// boundaries and whenever any pipeline may have been destroyed.
void InvalidatePipelineMemo() {
m_pipelineMemoCount = 0;
m_pipelineMemoNext = 0;
}
UnorderedMap<ProgramFactory::HashType, VkPipeline> m_computePipelines;
UniquePtr<ProgramFactory> m_programFactory;
UniquePtr<UniformManager> m_uniformManager;