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yuzu/src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp

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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <utility>
#include <vector>
#include <fmt/format.h>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/bit_util.h"
#include "common/common_types.h"
#include "common/literals.h"
#include "video_core/renderer_vulkan/vk_scheduler.h"
#include "video_core/renderer_vulkan/vk_staging_buffer_pool.h"
#include "video_core/vulkan_common/vulkan_device.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
namespace Vulkan {
namespace {
using namespace Common::Literals;
// Maximum potential alignment of a Vulkan buffer
constexpr VkDeviceSize MAX_ALIGNMENT = 256;
// Maximum size to put elements in the stream buffer
constexpr VkDeviceSize MAX_STREAM_BUFFER_REQUEST_SIZE = 8_MiB;
// Stream buffer size in bytes
constexpr VkDeviceSize STREAM_BUFFER_SIZE = 128_MiB;
constexpr VkDeviceSize REGION_SIZE = STREAM_BUFFER_SIZE / StagingBufferPool::NUM_SYNCS;
constexpr VkMemoryPropertyFlags HOST_FLAGS =
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
constexpr VkMemoryPropertyFlags STREAM_FLAGS = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT | HOST_FLAGS;
bool IsStreamHeap(VkMemoryHeap heap) noexcept {
return STREAM_BUFFER_SIZE < (heap.size * 2) / 3;
}
std::optional<u32> FindMemoryTypeIndex(const VkPhysicalDeviceMemoryProperties& props, u32 type_mask,
VkMemoryPropertyFlags flags) noexcept {
for (u32 type_index = 0; type_index < props.memoryTypeCount; ++type_index) {
if (((type_mask >> type_index) & 1) == 0) {
// Memory type is incompatible
continue;
}
const VkMemoryType& memory_type = props.memoryTypes[type_index];
if ((memory_type.propertyFlags & flags) != flags) {
// Memory type doesn't have the flags we want
continue;
}
if (!IsStreamHeap(props.memoryHeaps[memory_type.heapIndex])) {
// Memory heap is not suitable for streaming
continue;
}
// Success!
return type_index;
}
return std::nullopt;
}
u32 FindMemoryTypeIndex(const VkPhysicalDeviceMemoryProperties& props, u32 type_mask,
bool try_device_local) {
std::optional<u32> type;
if (try_device_local) {
// Try to find a DEVICE_LOCAL_BIT type, Nvidia and AMD have a dedicated heap for this
type = FindMemoryTypeIndex(props, type_mask, STREAM_FLAGS);
if (type) {
return *type;
}
}
// Otherwise try without the DEVICE_LOCAL_BIT
type = FindMemoryTypeIndex(props, type_mask, HOST_FLAGS);
if (type) {
return *type;
}
// This should never happen, and in case it does, signal it as an out of memory situation
throw vk::Exception(VK_ERROR_OUT_OF_DEVICE_MEMORY);
}
size_t Region(size_t iterator) noexcept {
return iterator / REGION_SIZE;
}
} // Anonymous namespace
StagingBufferPool::StagingBufferPool(const Device& device_, MemoryAllocator& memory_allocator_,
VKScheduler& scheduler_)
: device{device_}, memory_allocator{memory_allocator_}, scheduler{scheduler_} {
const vk::Device& dev = device.GetLogical();
stream_buffer = dev.CreateBuffer(VkBufferCreateInfo{
.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
.pNext = nullptr,
.flags = 0,
.size = STREAM_BUFFER_SIZE,
.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT |
VK_BUFFER_USAGE_INDEX_BUFFER_BIT | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
.sharingMode = VK_SHARING_MODE_EXCLUSIVE,
.queueFamilyIndexCount = 0,
.pQueueFamilyIndices = nullptr,
});
if (device.HasDebuggingToolAttached()) {
stream_buffer.SetObjectNameEXT("Stream Buffer");
}
VkMemoryDedicatedRequirements dedicated_reqs{
.sType = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_REQUIREMENTS,
.pNext = nullptr,
.prefersDedicatedAllocation = VK_FALSE,
.requiresDedicatedAllocation = VK_FALSE,
};
const auto requirements = dev.GetBufferMemoryRequirements(*stream_buffer, &dedicated_reqs);
const bool make_dedicated = dedicated_reqs.prefersDedicatedAllocation == VK_TRUE ||
dedicated_reqs.requiresDedicatedAllocation == VK_TRUE;
const VkMemoryDedicatedAllocateInfo dedicated_info{
.sType = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO,
.pNext = nullptr,
.image = nullptr,
.buffer = *stream_buffer,
};
const auto memory_properties = device.GetPhysical().GetMemoryProperties();
VkMemoryAllocateInfo stream_memory_info{
.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
.pNext = make_dedicated ? &dedicated_info : nullptr,
.allocationSize = requirements.size,
.memoryTypeIndex =
FindMemoryTypeIndex(memory_properties, requirements.memoryTypeBits, true),
};
stream_memory = dev.TryAllocateMemory(stream_memory_info);
if (!stream_memory) {
LOG_INFO(Render_Vulkan, "Dynamic memory allocation failed, trying with system memory");
stream_memory_info.memoryTypeIndex =
FindMemoryTypeIndex(memory_properties, requirements.memoryTypeBits, false);
stream_memory = dev.AllocateMemory(stream_memory_info);
}
if (device.HasDebuggingToolAttached()) {
stream_memory.SetObjectNameEXT("Stream Buffer Memory");
}
stream_buffer.BindMemory(*stream_memory, 0);
stream_pointer = stream_memory.Map(0, STREAM_BUFFER_SIZE);
}
StagingBufferPool::~StagingBufferPool() = default;
StagingBufferRef StagingBufferPool::Request(size_t size, MemoryUsage usage) {
if (usage == MemoryUsage::Upload && size <= MAX_STREAM_BUFFER_REQUEST_SIZE) {
return GetStreamBuffer(size);
}
return GetStagingBuffer(size, usage);
}
void StagingBufferPool::TickFrame() {
current_delete_level = (current_delete_level + 1) % NUM_LEVELS;
ReleaseCache(MemoryUsage::DeviceLocal);
ReleaseCache(MemoryUsage::Upload);
ReleaseCache(MemoryUsage::Download);
}
StagingBufferRef StagingBufferPool::GetStreamBuffer(size_t size) {
if (AreRegionsActive(Region(free_iterator) + 1,
std::min(Region(iterator + size) + 1, NUM_SYNCS))) {
// Avoid waiting for the previous usages to be free
return GetStagingBuffer(size, MemoryUsage::Upload);
}
const u64 current_tick = scheduler.CurrentTick();
std::fill(sync_ticks.begin() + Region(used_iterator), sync_ticks.begin() + Region(iterator),
current_tick);
used_iterator = iterator;
free_iterator = std::max(free_iterator, iterator + size);
if (iterator + size >= STREAM_BUFFER_SIZE) {
std::fill(sync_ticks.begin() + Region(used_iterator), sync_ticks.begin() + NUM_SYNCS,
current_tick);
used_iterator = 0;
iterator = 0;
free_iterator = size;
if (AreRegionsActive(0, Region(size) + 1)) {
// Avoid waiting for the previous usages to be free
return GetStagingBuffer(size, MemoryUsage::Upload);
}
}
const size_t offset = iterator;
iterator = Common::AlignUp(iterator + size, MAX_ALIGNMENT);
return StagingBufferRef{
.buffer = *stream_buffer,
.offset = static_cast<VkDeviceSize>(offset),
.mapped_span = std::span<u8>(stream_pointer + offset, size),
};
}
bool StagingBufferPool::AreRegionsActive(size_t region_begin, size_t region_end) const {
const u64 gpu_tick = scheduler.GetMasterSemaphore().KnownGpuTick();
return std::any_of(sync_ticks.begin() + region_begin, sync_ticks.begin() + region_end,
[gpu_tick](u64 sync_tick) { return gpu_tick < sync_tick; });
};
StagingBufferRef StagingBufferPool::GetStagingBuffer(size_t size, MemoryUsage usage) {
if (const std::optional<StagingBufferRef> ref = TryGetReservedBuffer(size, usage)) {
return *ref;
}
return CreateStagingBuffer(size, usage);
}
std::optional<StagingBufferRef> StagingBufferPool::TryGetReservedBuffer(size_t size,
MemoryUsage usage) {
StagingBuffers& cache_level = GetCache(usage)[Common::Log2Ceil64(size)];
const auto is_free = [this](const StagingBuffer& entry) {
return scheduler.IsFree(entry.tick);
};
auto& entries = cache_level.entries;
const auto hint_it = entries.begin() + cache_level.iterate_index;
auto it = std::find_if(entries.begin() + cache_level.iterate_index, entries.end(), is_free);
if (it == entries.end()) {
it = std::find_if(entries.begin(), hint_it, is_free);
if (it == hint_it) {
return std::nullopt;
}
}
cache_level.iterate_index = std::distance(entries.begin(), it) + 1;
it->tick = scheduler.CurrentTick();
return it->Ref();
}
StagingBufferRef StagingBufferPool::CreateStagingBuffer(size_t size, MemoryUsage usage) {
const u32 log2 = Common::Log2Ceil64(size);
vk::Buffer buffer = device.GetLogical().CreateBuffer({
.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
.pNext = nullptr,
.flags = 0,
.size = 1ULL << log2,
.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT |
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
VK_BUFFER_USAGE_INDEX_BUFFER_BIT | VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
.sharingMode = VK_SHARING_MODE_EXCLUSIVE,
.queueFamilyIndexCount = 0,
.pQueueFamilyIndices = nullptr,
});
if (device.HasDebuggingToolAttached()) {
++buffer_index;
buffer.SetObjectNameEXT(fmt::format("Staging Buffer {}", buffer_index).c_str());
}
MemoryCommit commit = memory_allocator.Commit(buffer, usage);
const std::span<u8> mapped_span = IsHostVisible(usage) ? commit.Map() : std::span<u8>{};
StagingBuffer& entry = GetCache(usage)[log2].entries.emplace_back(StagingBuffer{
.buffer = std::move(buffer),
.commit = std::move(commit),
.mapped_span = mapped_span,
.tick = scheduler.CurrentTick(),
});
return entry.Ref();
}
StagingBufferPool::StagingBuffersCache& StagingBufferPool::GetCache(MemoryUsage usage) {
switch (usage) {
case MemoryUsage::DeviceLocal:
return device_local_cache;
case MemoryUsage::Upload:
return upload_cache;
case MemoryUsage::Download:
return download_cache;
default:
UNREACHABLE_MSG("Invalid memory usage={}", usage);
return upload_cache;
}
}
void StagingBufferPool::ReleaseCache(MemoryUsage usage) {
ReleaseLevel(GetCache(usage), current_delete_level);
}
void StagingBufferPool::ReleaseLevel(StagingBuffersCache& cache, size_t log2) {
constexpr size_t deletions_per_tick = 16;
auto& staging = cache[log2];
auto& entries = staging.entries;
const size_t old_size = entries.size();
const auto is_deleteable = [this](const StagingBuffer& entry) {
return scheduler.IsFree(entry.tick);
};
const size_t begin_offset = staging.delete_index;
const size_t end_offset = std::min(begin_offset + deletions_per_tick, old_size);
const auto begin = entries.begin() + begin_offset;
const auto end = entries.begin() + end_offset;
entries.erase(std::remove_if(begin, end, is_deleteable), end);
const size_t new_size = entries.size();
staging.delete_index += deletions_per_tick;
if (staging.delete_index >= new_size) {
staging.delete_index = 0;
}
if (staging.iterate_index > new_size) {
staging.iterate_index = 0;
}
}
} // namespace Vulkan
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