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vulkan: reduce memory usage when many shaders are being used with many draw calls.

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Descriptor pools are now shared among shaders that have the same descriptor counts, instead of being unique per shader.
This commit is contained in:
Sasha Szpakowski
2025-01-26 14:45:51 -04:00
parent 32bd2bdaad
commit 92e79ab609
5 changed files with 247 additions and 98 deletions
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src/modules/graphics/vulkan/Graphics.h
+13
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@@ -273,6 +273,8 @@ public:
void addReadbackCallback(std::function<void()> callback);
void submitGpuCommands(SubmitMode, void *screenshotCallbackData = nullptr);
VkSampler getCachedSampler(const SamplerState &sampler);
SharedDescriptorPools *acquireDescriptorPools(int dynamicUniformBuffers, int sampledTextures, int storageTextures, int texelBuffers, int storageBuffers);
void releaseDescriptorPools(SharedDescriptorPools *pools);
graphics::Shader::BuiltinUniformData getCurrentBuiltinUniformData();
const OptionalDeviceExtensions &getEnabledOptionalDeviceExtensions() const;
const OptionalInstanceExtensions &getEnabledOptionalInstanceExtensions() const;
@@ -287,6 +289,8 @@ public:
uint32 getDeviceApiVersion() const { return deviceApiVersion; }
uint64 getRealFrameIndex() const { return realFrameIndex; }
protected:
graphics::ShaderStage *newShaderStageInternal(ShaderStageType stage, const std::string &cachekey, const std::string &source, bool gles) override;
graphics::Shader *newShaderInternal(StrongRef<love::graphics::ShaderStage> stages[SHADERSTAGE_MAX_ENUM], const Shader::CompileOptions &options) override;
@@ -298,6 +302,13 @@ protected:
void setRenderTargetsInternal(const RenderTargets &rts, int pixelw, int pixelh, bool hasSRGBtexture) override;
private:
struct SharedDescriptorPoolsRef
{
SharedDescriptorPools *pools = nullptr;
int referenceCount = 0;
};
bool checkValidationSupport();
void pickPhysicalDevice();
int rateDeviceSuitability(VkPhysicalDevice device, bool querySwapChain);
@@ -381,6 +392,7 @@ private:
std::unordered_map<FramebufferConfiguration, VkFramebuffer, FramebufferConfigurationHasher> framebuffers;
std::unordered_map<VkFramebuffer, bool> framebufferUsages;
std::unordered_map<uint64, VkSampler> samplers;
std::unordered_map<uint64, SharedDescriptorPoolsRef> sharedDescriptorPools;
VkCommandPool commandPool = VK_NULL_HANDLE;
std::vector<VkCommandBuffer> commandBuffers;
std::vector<VkSemaphore> imageAvailableSemaphores;
@@ -392,6 +404,7 @@ private:
bool imageRequested = false;
size_t currentFrame = 0;
uint32_t imageIndex = 0;
uint64 realFrameIndex = 0;
bool swapChainRecreationRequested = false;
bool transitionColorDepthLayouts = false;
VmaAllocator vmaAllocator = VK_NULL_HANDLE;