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Simplify free descriptor set accounting and update ratios

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Slightly reduces descriptor usage in Breath of The Wild
This commit is contained in:
Billy Laws 2023-01-20 21:01:13 +00:00
parent 5e862cf5f7
commit bbef006051
2 changed files with 21 additions and 15 deletions
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34
app/src/main/cpp/skyline/gpu/descriptor_allocator.cpp
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@ -16,29 +16,34 @@ namespace skyline::gpu {
void DescriptorAllocator::AllocateDescriptorPool() {
namespace maxwell3d = soc::gm20b::engine::maxwell3d::type; // We use Maxwell3D as reference for base descriptor counts
using DescriptorSizes = std::array<vk::DescriptorPoolSize, 5>;
using DescriptorSizes = std::array<vk::DescriptorPoolSize, 6>;
constexpr DescriptorSizes BaseDescriptorSizes{
vk::DescriptorPoolSize{
.descriptorCount = maxwell3d::ShaderStageConstantBufferCount,
.descriptorCount = 512,
.type = vk::DescriptorType::eUniformBuffer,
},
vk::DescriptorPoolSize{
.descriptorCount = maxwell3d::ShaderStageCount * 5,
.descriptorCount = 64,
.type = vk::DescriptorType::eStorageBuffer,
},
vk::DescriptorPoolSize{
.descriptorCount = maxwell3d::ShaderStageCount * 5,
.descriptorCount = 256,
.type = vk::DescriptorType::eCombinedImageSampler,
},
vk::DescriptorPoolSize{
.descriptorCount = maxwell3d::ShaderStageCount,
.descriptorCount = 16,
.type = vk::DescriptorType::eStorageImage,
},
vk::DescriptorPoolSize{
.descriptorCount = maxwell3d::ColorTargetCount,
.type = vk::DescriptorType::eInputAttachment,
.descriptorCount = 4,
.type = vk::DescriptorType::eUniformTexelBuffer,
},
}; //!< A best approximate ratio of descriptors of each type that may be utilized, the total amount will grow in these ratios
vk::DescriptorPoolSize{
.descriptorCount = 4,
.type = vk::DescriptorType::eStorageTexelBuffer,
} //!< Approximated descriptor counts based off empirical testing, the total amount will grow in these ratios
};
DescriptorSizes descriptorSizes{BaseDescriptorSizes};
for (auto &descriptorSize : descriptorSizes)
@ -49,6 +54,8 @@ namespace skyline::gpu {
.pPoolSizes = descriptorSizes.data(),
.poolSizeCount = descriptorSizes.size(),
});
pool->freeSetCount = descriptorSetCount;
}
vk::ResultValue<vk::DescriptorSet> DescriptorAllocator::AllocateVkDescriptorSet(vk::DescriptorSetLayout layout) {
@ -60,6 +67,9 @@ namespace skyline::gpu {
vk::DescriptorSet descriptorSet{};
auto result{(*gpu.vkDevice).allocateDescriptorSets(&allocateInfo, &descriptorSet, *gpu.vkDevice.getDispatcher())};
if (pool->freeSetCount > 0)
pool->freeSetCount--;
return vk::createResultValue(result, descriptorSet, __builtin_FUNCTION(), {
vk::Result::eSuccess,
vk::Result::eErrorOutOfPoolMemory,
@ -67,9 +77,7 @@ namespace skyline::gpu {
});
}
DescriptorAllocator::ActiveDescriptorSet::ActiveDescriptorSet(std::shared_ptr<DescriptorPool> pPool, DescriptorSetSlot *slot) : pool{std::move(pPool)}, slot{slot} {
pool->freeSetCount--;
}
DescriptorAllocator::ActiveDescriptorSet::ActiveDescriptorSet(std::shared_ptr<DescriptorPool> pPool, DescriptorSetSlot *slot) : pool{std::move(pPool)}, slot{slot} {}
DescriptorAllocator::ActiveDescriptorSet::ActiveDescriptorSet(DescriptorAllocator::ActiveDescriptorSet &&other) noexcept {
pool = std::move(other.pool);
@ -77,10 +85,8 @@ namespace skyline::gpu {
}
DescriptorAllocator::ActiveDescriptorSet::~ActiveDescriptorSet() {
if (slot) {
if (slot)
slot->active.clear(std::memory_order_release);
pool->freeSetCount++;
}
}
DescriptorAllocator::DescriptorAllocator(GPU &gpu) : gpu{gpu} {

2
app/src/main/cpp/skyline/gpu/descriptor_allocator.h
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@ -36,7 +36,7 @@ namespace skyline::gpu {
* @brief A lockable VkDescriptorPool for maintaining external synchronization requirements
*/
struct DescriptorPool : public vk::raii::DescriptorPool {
std::atomic<u64> freeSetCount{}; //!< The amount of sets free to allocate from this pool
size_t freeSetCount{}; //!< The amount of sets free to allocate from this pool
std::unordered_map<vk::DescriptorSetLayout, std::list<DescriptorSetSlot>> layoutSlots; //!< A map of pools based on the layout of the descriptor sets
DescriptorPool(vk::raii::Device const &device, vk::DescriptorPoolCreateInfo const &createInfo);