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[Perf] (DirectVulkan): memoize resolved vertex-input state on the VAO and dedupe vertex/index binds

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This commit is contained in:
swung0x48
2026-07-30 07:02:01 -04:00
parent a12068df52
commit ec685b9fa7
4 changed files with 107 additions and 13 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VertexInputStateFactory.cpp
+24 -5
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@@ -58,15 +58,27 @@ namespace MobileGL::MG_Backend::DirectVulkan {
const VertexInputStateFactory::BackendVertexInputState& VertexInputStateFactory::GetOrCreateVertexInputState(
const MG_State::GLState::VertexArrayObject& vao) {
return GetOrCreateVertexInputState(vao, GetOrComputeHash(vao));
// Per-draw fast path: the VAO carries a pointer to its resolved entry,
// valid while its config version and the cache's eviction epoch both
// match - no re-hash, no map lookup.
const void* memoState = nullptr;
Uint64 memoEpoch = 0;
if (vao.GetBackendStateMemo(memoState, memoEpoch) && memoEpoch == m_evictionEpoch) {
const auto* entry = static_cast<const BackendVertexInputState*>(memoState);
entry->lastUsedFrameBoundary = m_frameBoundaryCounter;
return *entry;
}
const BackendVertexInputState& entry = GetOrCreateVertexInputState(vao, GetOrComputeHash(vao));
vao.SetBackendStateMemo(&entry, m_evictionEpoch);
return entry;
}
const VertexInputStateFactory::BackendVertexInputState& VertexInputStateFactory::GetOrCreateVertexInputState(
const MG_State::GLState::VertexArrayObject& vao, HashType hash) {
auto it = m_cache.find(hash);
if (it != m_cache.end()) {
it->second.lastUsedFrameBoundary = m_frameBoundaryCounter;
return it->second;
it->second->lastUsedFrameBoundary = m_frameBoundaryCounter;
return *it->second;
}
VertexInputStateBuilder builder;
@@ -172,7 +184,11 @@ namespace MobileGL::MG_Backend::DirectVulkan {
const auto& state = builder.Build();
auto& entry = m_cache[hash];
auto& slot = m_cache[hash];
if (!slot) {
slot = MakeUnique<BackendVertexInputState>();
}
BackendVertexInputState& entry = *slot;
entry.hash = hash;
entry.lastUsedFrameBoundary = m_frameBoundaryCounter;
entry.bindings = builder.GetBindings();
@@ -221,8 +237,11 @@ namespace MobileGL::MG_Backend::DirectVulkan {
}
for (auto it = m_cache.begin(); it != m_cache.end();) {
if (m_frameBoundaryCounter - it->second.lastUsedFrameBoundary > kRetireAgeBoundaries) {
if (m_frameBoundaryCounter - it->second->lastUsedFrameBoundary > kRetireAgeBoundaries) {
it = m_cache.erase(it);
// Invalidate every VAO's state-pointer memo: the erased node's
// address may be reused by a future insert.
++m_evictionEpoch;
} else {
++it;
}