Merge pull request #4674 from ReinUsesLisp/timeline-semaphores
renderer_vulkan: Make unconditional use of VK_KHR_timeline_semaphoremaster
bunnei
GitHub
commit
d66b897a6d
@ -0,0 +1,41 @@
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cstddef>
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#include "video_core/renderer_vulkan/vk_command_pool.h"
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#include "video_core/renderer_vulkan/vk_device.h"
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#include "video_core/renderer_vulkan/wrapper.h"
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namespace Vulkan {
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constexpr size_t COMMAND_BUFFER_POOL_SIZE = 0x1000;
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CommandPool::CommandPool(MasterSemaphore& master_semaphore, const VKDevice& device)
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: ResourcePool(master_semaphore, COMMAND_BUFFER_POOL_SIZE), device{device} {}
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CommandPool::~CommandPool() = default;
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void CommandPool::Allocate(size_t begin, size_t end) {
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// Command buffers are going to be commited, recorded, executed every single usage cycle.
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// They are also going to be reseted when commited.
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Pool& pool = pools.emplace_back();
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pool.handle = device.GetLogical().CreateCommandPool({
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.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
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.pNext = nullptr,
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.flags =
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VK_COMMAND_POOL_CREATE_TRANSIENT_BIT | VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
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.queueFamilyIndex = device.GetGraphicsFamily(),
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});
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pool.cmdbufs = pool.handle.Allocate(COMMAND_BUFFER_POOL_SIZE);
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}
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VkCommandBuffer CommandPool::Commit() {
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const size_t index = CommitResource();
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const auto pool_index = index / COMMAND_BUFFER_POOL_SIZE;
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const auto sub_index = index % COMMAND_BUFFER_POOL_SIZE;
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return pools[pool_index].cmdbufs[sub_index];
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}
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} // namespace Vulkan
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cstddef>
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#include <vector>
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#include "video_core/renderer_vulkan/vk_resource_pool.h"
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#include "video_core/renderer_vulkan/wrapper.h"
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namespace Vulkan {
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class MasterSemaphore;
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class VKDevice;
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class CommandPool final : public ResourcePool {
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public:
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explicit CommandPool(MasterSemaphore& master_semaphore, const VKDevice& device);
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virtual ~CommandPool();
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void Allocate(size_t begin, size_t end) override;
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VkCommandBuffer Commit();
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private:
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struct Pool {
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vk::CommandPool handle;
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vk::CommandBuffers cmdbufs;
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};
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const VKDevice& device;
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std::vector<Pool> pools;
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};
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} // namespace Vulkan
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <atomic>
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#include <chrono>
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#include "core/settings.h"
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#include "video_core/renderer_vulkan/vk_device.h"
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#include "video_core/renderer_vulkan/vk_master_semaphore.h"
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#include "video_core/renderer_vulkan/wrapper.h"
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namespace Vulkan {
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using namespace std::chrono_literals;
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MasterSemaphore::MasterSemaphore(const VKDevice& device) {
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static constexpr VkSemaphoreTypeCreateInfoKHR semaphore_type_ci{
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.sType = VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO_KHR,
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.pNext = nullptr,
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.semaphoreType = VK_SEMAPHORE_TYPE_TIMELINE_KHR,
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.initialValue = 0,
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};
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static constexpr VkSemaphoreCreateInfo semaphore_ci{
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.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO,
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.pNext = &semaphore_type_ci,
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.flags = 0,
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};
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semaphore = device.GetLogical().CreateSemaphore(semaphore_ci);
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if (!Settings::values.renderer_debug) {
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return;
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}
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// Validation layers have a bug where they fail to track resource usage when using timeline
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// semaphores and synchronizing with GetSemaphoreCounterValueKHR. To workaround this issue, have
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// a separate thread waiting for each timeline semaphore value.
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debug_thread = std::thread([this] {
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u64 counter = 0;
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while (!shutdown) {
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if (semaphore.Wait(counter, 10'000'000)) {
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++counter;
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}
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}
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});
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}
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MasterSemaphore::~MasterSemaphore() {
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shutdown = true;
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// This thread might not be started
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if (debug_thread.joinable()) {
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debug_thread.join();
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}
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}
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} // namespace Vulkan
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <atomic>
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#include <thread>
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#include "common/common_types.h"
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#include "video_core/renderer_vulkan/wrapper.h"
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namespace Vulkan {
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class VKDevice;
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class MasterSemaphore {
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public:
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explicit MasterSemaphore(const VKDevice& device);
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~MasterSemaphore();
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/// Returns the current logical tick.
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[[nodiscard]] u64 CurrentTick() const noexcept {
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return current_tick;
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}
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/// Returns the timeline semaphore handle.
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[[nodiscard]] VkSemaphore Handle() const noexcept {
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return *semaphore;
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}
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/// Returns true when a tick has been hit by the GPU.
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[[nodiscard]] bool IsFree(u64 tick) {
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return gpu_tick >= tick;
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}
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/// Advance to the logical tick.
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void NextTick() noexcept {
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++current_tick;
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}
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/// Refresh the known GPU tick
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void Refresh() {
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gpu_tick = semaphore.GetCounter();
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}
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/// Waits for a tick to be hit on the GPU
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void Wait(u64 tick) {
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// No need to wait if the GPU is ahead of the tick
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if (IsFree(tick)) {
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return;
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}
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// Update the GPU tick and try again
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Refresh();
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if (IsFree(tick)) {
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return;
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}
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// If none of the above is hit, fallback to a regular wait
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semaphore.Wait(tick);
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}
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private:
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vk::Semaphore semaphore; ///< Timeline semaphore.
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std::atomic<u64> gpu_tick{0}; ///< Current known GPU tick.
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std::atomic<u64> current_tick{1}; ///< Current logical tick.
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std::atomic<bool> shutdown{false}; ///< True when the object is being destroyed.
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std::thread debug_thread; ///< Debug thread to workaround validation layer bugs.
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};
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} // namespace Vulkan
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@ -1,311 +0,0 @@
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// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <optional>
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "video_core/renderer_vulkan/vk_device.h"
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#include "video_core/renderer_vulkan/vk_resource_manager.h"
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#include "video_core/renderer_vulkan/wrapper.h"
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namespace Vulkan {
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namespace {
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// TODO(Rodrigo): Fine tune these numbers.
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constexpr std::size_t COMMAND_BUFFER_POOL_SIZE = 0x1000;
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constexpr std::size_t FENCES_GROW_STEP = 0x40;
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constexpr VkFenceCreateInfo BuildFenceCreateInfo() {
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return {
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.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO,
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.pNext = nullptr,
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.flags = 0,
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};
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}
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} // Anonymous namespace
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class CommandBufferPool final : public VKFencedPool {
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public:
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explicit CommandBufferPool(const VKDevice& device)
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: VKFencedPool(COMMAND_BUFFER_POOL_SIZE), device{device} {}
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void Allocate(std::size_t begin, std::size_t end) override {
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// Command buffers are going to be commited, recorded, executed every single usage cycle.
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// They are also going to be reseted when commited.
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Pool& pool = pools.emplace_back();
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pool.handle = device.GetLogical().CreateCommandPool({
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.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
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.pNext = nullptr,
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.flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT |
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VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
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.queueFamilyIndex = device.GetGraphicsFamily(),
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});
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pool.cmdbufs = pool.handle.Allocate(COMMAND_BUFFER_POOL_SIZE);
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}
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VkCommandBuffer Commit(VKFence& fence) {
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const std::size_t index = CommitResource(fence);
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const auto pool_index = index / COMMAND_BUFFER_POOL_SIZE;
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const auto sub_index = index % COMMAND_BUFFER_POOL_SIZE;
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return pools[pool_index].cmdbufs[sub_index];
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}
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private:
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struct Pool {
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vk::CommandPool handle;
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vk::CommandBuffers cmdbufs;
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};
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const VKDevice& device;
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std::vector<Pool> pools;
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};
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VKResource::VKResource() = default;
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VKResource::~VKResource() = default;
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VKFence::VKFence(const VKDevice& device)
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: device{device}, handle{device.GetLogical().CreateFence(BuildFenceCreateInfo())} {}
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VKFence::~VKFence() = default;
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void VKFence::Wait() {
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switch (const VkResult result = handle.Wait()) {
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case VK_SUCCESS:
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return;
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case VK_ERROR_DEVICE_LOST:
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device.ReportLoss();
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[[fallthrough]];
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default:
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throw vk::Exception(result);
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}
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}
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void VKFence::Release() {
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ASSERT(is_owned);
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is_owned = false;
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}
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void VKFence::Commit() {
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is_owned = true;
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is_used = true;
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}
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bool VKFence::Tick(bool gpu_wait, bool owner_wait) {
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if (!is_used) {
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// If a fence is not used it's always free.
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return true;
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}
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if (is_owned && !owner_wait) {
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// The fence is still being owned (Release has not been called) and ownership wait has
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// not been asked.
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return false;
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}
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if (gpu_wait) {
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// Wait for the fence if it has been requested.
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(void)handle.Wait();
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} else {
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if (handle.GetStatus() != VK_SUCCESS) {
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// Vulkan fence is not ready, not much it can do here
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return false;
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}
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}
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// Broadcast resources their free state.
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for (auto* resource : protected_resources) {
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resource->OnFenceRemoval(this);
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}
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protected_resources.clear();
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// Prepare fence for reusage.
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handle.Reset();
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is_used = false;
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return true;
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}
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void VKFence::Protect(VKResource* resource) {
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protected_resources.push_back(resource);
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}
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void VKFence::Unprotect(VKResource* resource) {
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const auto it = std::find(protected_resources.begin(), protected_resources.end(), resource);
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ASSERT(it != protected_resources.end());
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resource->OnFenceRemoval(this);
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protected_resources.erase(it);
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}
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void VKFence::RedirectProtection(VKResource* old_resource, VKResource* new_resource) noexcept {
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std::replace(std::begin(protected_resources), std::end(protected_resources), old_resource,
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new_resource);
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}
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VKFenceWatch::VKFenceWatch() = default;
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VKFenceWatch::VKFenceWatch(VKFence& initial_fence) {
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Watch(initial_fence);
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}
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VKFenceWatch::VKFenceWatch(VKFenceWatch&& rhs) noexcept {
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fence = std::exchange(rhs.fence, nullptr);
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if (fence) {
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fence->RedirectProtection(&rhs, this);
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}
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}
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VKFenceWatch& VKFenceWatch::operator=(VKFenceWatch&& rhs) noexcept {
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fence = std::exchange(rhs.fence, nullptr);
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if (fence) {
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fence->RedirectProtection(&rhs, this);
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}
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return *this;
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}
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VKFenceWatch::~VKFenceWatch() {
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if (fence) {
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fence->Unprotect(this);
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}
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}
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void VKFenceWatch::Wait() {
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if (fence == nullptr) {
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return;
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}
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fence->Wait();
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fence->Unprotect(this);
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}
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void VKFenceWatch::Watch(VKFence& new_fence) {
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Wait();
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fence = &new_fence;
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fence->Protect(this);
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}
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bool VKFenceWatch::TryWatch(VKFence& new_fence) {
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if (fence) {
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return false;
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}
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fence = &new_fence;
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fence->Protect(this);
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return true;
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}
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void VKFenceWatch::OnFenceRemoval(VKFence* signaling_fence) {
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ASSERT_MSG(signaling_fence == fence, "Removing the wrong fence");
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fence = nullptr;
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}
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VKFencedPool::VKFencedPool(std::size_t grow_step) : grow_step{grow_step} {}
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VKFencedPool::~VKFencedPool() = default;
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std::size_t VKFencedPool::CommitResource(VKFence& fence) {
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const auto Search = [&](std::size_t begin, std::size_t end) -> std::optional<std::size_t> {
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for (std::size_t iterator = begin; iterator < end; ++iterator) {
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if (watches[iterator]->TryWatch(fence)) {
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// The resource is now being watched, a free resource was successfully found.
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return iterator;
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}
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}
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return {};
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};
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// Try to find a free resource from the hinted position to the end.
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auto found = Search(free_iterator, watches.size());
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if (!found) {
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// Search from beginning to the hinted position.
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found = Search(0, free_iterator);
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if (!found) {
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// Both searches failed, the pool is full; handle it.
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const std::size_t free_resource = ManageOverflow();
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// Watch will wait for the resource to be free.
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watches[free_resource]->Watch(fence);
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found = free_resource;
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}
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}
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// Free iterator is hinted to the resource after the one that's been commited.
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free_iterator = (*found + 1) % watches.size();
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return *found;
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}
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std::size_t VKFencedPool::ManageOverflow() {
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const std::size_t old_capacity = watches.size();
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Grow();
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// The last entry is guaranted to be free, since it's the first element of the freshly
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// allocated resources.
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return old_capacity;
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}
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void VKFencedPool::Grow() {
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const std::size_t old_capacity = watches.size();
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watches.resize(old_capacity + grow_step);
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std::generate(watches.begin() + old_capacity, watches.end(),
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[]() { return std::make_unique<VKFenceWatch>(); });
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Allocate(old_capacity, old_capacity + grow_step);
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}
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VKResourceManager::VKResourceManager(const VKDevice& device) : device{device} {
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GrowFences(FENCES_GROW_STEP);
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command_buffer_pool = std::make_unique<CommandBufferPool>(device);
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}
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VKResourceManager::~VKResourceManager() = default;
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VKFence& VKResourceManager::CommitFence() {
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const auto StepFences = [&](bool gpu_wait, bool owner_wait) -> VKFence* {
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const auto Tick = [=](auto& fence) { return fence->Tick(gpu_wait, owner_wait); };
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const auto hinted = fences.begin() + fences_iterator;
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auto it = std::find_if(hinted, fences.end(), Tick);
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if (it == fences.end()) {
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it = std::find_if(fences.begin(), hinted, Tick);
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if (it == hinted) {
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return nullptr;
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}
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}
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fences_iterator = std::distance(fences.begin(), it) + 1;
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if (fences_iterator >= fences.size())
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fences_iterator = 0;
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auto& fence = *it;
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fence->Commit();
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return fence.get();
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};
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VKFence* found_fence = StepFences(false, false);
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if (!found_fence) {
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// Try again, this time waiting.
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found_fence = StepFences(true, false);
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|
||||
if (!found_fence) {
|
||||
// Allocate new fences and try again.
|
||||
LOG_INFO(Render_Vulkan, "Allocating new fences {} -> {}", fences.size(),
|
||||
fences.size() + FENCES_GROW_STEP);
|
||||
|
||||
GrowFences(FENCES_GROW_STEP);
|
||||
found_fence = StepFences(true, false);
|
||||
ASSERT(found_fence != nullptr);
|
||||
}
|
||||
}
|
||||
return *found_fence;
|
||||
}
|
||||
|
||||
VkCommandBuffer VKResourceManager::CommitCommandBuffer(VKFence& fence) {
|
||||
return command_buffer_pool->Commit(fence);
|
||||
}
|
||||
|
||||
void VKResourceManager::GrowFences(std::size_t new_fences_count) {
|
||||
const std::size_t previous_size = fences.size();
|
||||
fences.resize(previous_size + new_fences_count);
|
||||
|
||||
std::generate(fences.begin() + previous_size, fences.end(),
|
||||
[this] { return std::make_unique<VKFence>(device); });
|
||||
}
|
||||
|
||||
} // namespace Vulkan
|
||||
@ -1,196 +0,0 @@
|
||||
// Copyright 2018 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <cstddef>
|
||||
#include <memory>
|
||||
#include <vector>
|
||||
#include "video_core/renderer_vulkan/wrapper.h"
|
||||
|
||||
namespace Vulkan {
|
||||
|
||||
class VKDevice;
|
||||
class VKFence;
|
||||
class VKResourceManager;
|
||||
|
||||
class CommandBufferPool;
|
||||
|
||||
/// Interface for a Vulkan resource
|
||||
class VKResource {
|
||||
public:
|
||||
explicit VKResource();
|
||||
virtual ~VKResource();
|
||||
|
||||
/**
|
||||
* Signals the object that an owning fence has been signaled.
|
||||
* @param signaling_fence Fence that signals its usage end.
|
||||
*/
|
||||
virtual void OnFenceRemoval(VKFence* signaling_fence) = 0;
|
||||
};
|
||||
|
||||
/**
|
||||
* Fences take ownership of objects, protecting them from GPU-side or driver-side concurrent access.
|
||||
* They must be commited from the resource manager. Their usage flow is: commit the fence from the
|
||||
* resource manager, protect resources with it and use them, send the fence to an execution queue
|
||||
* and Wait for it if needed and then call Release. Used resources will automatically be signaled
|
||||
* when they are free to be reused.
|
||||
* @brief Protects resources for concurrent usage and signals its release.
|
||||
*/
|
||||
class VKFence {
|
||||
friend class VKResourceManager;
|
||||
|
||||
public:
|
||||
explicit VKFence(const VKDevice& device);
|
||||
~VKFence();
|
||||
|
||||
/**
|
||||
* Waits for the fence to be signaled.
|
||||
* @warning You must have ownership of the fence and it has to be previously sent to a queue to
|
||||
* call this function.
|
||||
*/
|
||||
void Wait();
|
||||
|
||||
/**
|
||||
* Releases ownership of the fence. Pass after it has been sent to an execution queue.
|
||||
* Unmanaged usage of the fence after the call will result in undefined behavior because it may
|
||||
* be being used for something else.
|
||||
*/
|
||||
void Release();
|
||||
|
||||
/// Protects a resource with this fence.
|
||||
void Protect(VKResource* resource);
|
||||
|
||||
/// Removes protection for a resource.
|
||||
void Unprotect(VKResource* resource);
|
||||
|
||||
/// Redirects one protected resource to a new address.
|
||||
void RedirectProtection(VKResource* old_resource, VKResource* new_resource) noexcept;
|
||||
|
||||
/// Retreives the fence.
|
||||
operator VkFence() const {
|
||||
return *handle;
|
||||
}
|
||||
|
||||
private:
|
||||
/// Take ownership of the fence.
|
||||
void Commit();
|
||||
|
||||
/**
|
||||
* Updates the fence status.
|
||||
* @warning Waiting for the owner might soft lock the execution.
|
||||
* @param gpu_wait Wait for the fence to be signaled by the driver.
|
||||
* @param owner_wait Wait for the owner to signal its freedom.
|
||||
* @returns True if the fence is free. Waiting for gpu and owner will always return true.
|
||||
*/
|
||||
bool Tick(bool gpu_wait, bool owner_wait);
|
||||
|
||||
const VKDevice& device; ///< Device handler
|
||||
vk::Fence handle; ///< Vulkan fence
|
||||
std::vector<VKResource*> protected_resources; ///< List of resources protected by this fence
|
||||
bool is_owned = false; ///< The fence has been commited but not released yet.
|
||||
bool is_used = false; ///< The fence has been commited but it has not been checked to be free.
|
||||
};
|
||||
|
||||
/**
|
||||
* A fence watch is used to keep track of the usage of a fence and protect a resource or set of
|
||||
* resources without having to inherit VKResource from their handlers.
|
||||
*/
|
||||
class VKFenceWatch final : public VKResource {
|
||||
public:
|
||||
explicit VKFenceWatch();
|
||||
VKFenceWatch(VKFence& initial_fence);
|
||||
VKFenceWatch(VKFenceWatch&&) noexcept;
|
||||
VKFenceWatch(const VKFenceWatch&) = delete;
|
||||
~VKFenceWatch() override;
|
||||
|
||||
VKFenceWatch& operator=(VKFenceWatch&&) noexcept;
|
||||
|
||||
/// Waits for the fence to be released.
|
||||
void Wait();
|
||||
|
||||
/**
|
||||
* Waits for a previous fence and watches a new one.
|
||||
* @param new_fence New fence to wait to.
|
||||
*/
|
||||
void Watch(VKFence& new_fence);
|
||||
|
||||
/**
|
||||
* Checks if it's currently being watched and starts watching it if it's available.
|
||||
* @returns True if a watch has started, false if it's being watched.
|
||||
*/
|
||||
bool TryWatch(VKFence& new_fence);
|
||||
|
||||
void OnFenceRemoval(VKFence* signaling_fence) override;
|
||||
|
||||
/**
|
||||
* Do not use it paired with Watch. Use TryWatch instead.
|
||||
* Returns true when the watch is free.
|
||||
*/
|
||||
bool IsUsed() const {
|
||||
return fence != nullptr;
|
||||
}
|
||||
|
||||
private:
|
||||
VKFence* fence{}; ///< Fence watching this resource. nullptr when the watch is free.
|
||||
};
|
||||
|
||||
/**
|
||||
* Handles a pool of resources protected by fences. Manages resource overflow allocating more
|
||||
* resources.
|
||||
*/
|
||||
class VKFencedPool {
|
||||
public:
|
||||
explicit VKFencedPool(std::size_t grow_step);
|
||||
virtual ~VKFencedPool();
|
||||
|
||||
protected:
|
||||
/**
|
||||
* Commits a free resource and protects it with a fence. It may allocate new resources.
|
||||
* @param fence Fence that protects the commited resource.
|
||||
* @returns Index of the resource commited.
|
||||
*/
|
||||
std::size_t CommitResource(VKFence& fence);
|
||||
|
||||
/// Called when a chunk of resources have to be allocated.
|
||||
virtual void Allocate(std::size_t begin, std::size_t end) = 0;
|
||||
|
||||
private:
|
||||
/// Manages pool overflow allocating new resources.
|
||||
std::size_t ManageOverflow();
|
||||
|
||||
/// Allocates a new page of resources.
|
||||
void Grow();
|
||||
|
||||
std::size_t grow_step = 0; ///< Number of new resources created after an overflow
|
||||
std::size_t free_iterator = 0; ///< Hint to where the next free resources is likely to be found
|
||||
std::vector<std::unique_ptr<VKFenceWatch>> watches; ///< Set of watched resources
|
||||
};
|
||||
|
||||
/**
|
||||
* The resource manager handles all resources that can be protected with a fence avoiding
|
||||
* driver-side or GPU-side concurrent usage. Usage is documented in VKFence.
|
||||
*/
|
||||
class VKResourceManager final {
|
||||
public:
|
||||
explicit VKResourceManager(const VKDevice& device);
|
||||
~VKResourceManager();
|
||||
|
||||
/// Commits a fence. It has to be sent to a queue and released.
|
||||
VKFence& CommitFence();
|
||||
|
||||
/// Commits an unused command buffer and protects it with a fence.
|
||||
VkCommandBuffer CommitCommandBuffer(VKFence& fence);
|
||||
|
||||
private:
|
||||
/// Allocates new fences.
|
||||
void GrowFences(std::size_t new_fences_count);
|
||||
|
||||
const VKDevice& device; ///< Device handler.
|
||||
std::size_t fences_iterator = 0; ///< Index where a free fence is likely to be found.
|
||||
std::vector<std::unique_ptr<VKFence>> fences; ///< Pool of fences.
|
||||
std::unique_ptr<CommandBufferPool> command_buffer_pool; ///< Pool of command buffers.
|
||||
};
|
||||
|
||||
} // namespace Vulkan
|
||||
@ -0,0 +1,63 @@
|
||||
// Copyright 2020 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <optional>
|
||||
|
||||
#include "video_core/renderer_vulkan/vk_master_semaphore.h"
|
||||
#include "video_core/renderer_vulkan/vk_resource_pool.h"
|
||||
|
||||
namespace Vulkan {
|
||||
|
||||
ResourcePool::ResourcePool(MasterSemaphore& master_semaphore_, size_t grow_step_)
|
||||
: master_semaphore{master_semaphore_}, grow_step{grow_step_} {}
|
||||
|
||||
ResourcePool::~ResourcePool() = default;
|
||||
|
||||
size_t ResourcePool::CommitResource() {
|
||||
// Refresh semaphore to query updated results
|
||||
master_semaphore.Refresh();
|
||||
|
||||
const auto search = [this](size_t begin, size_t end) -> std::optional<size_t> {
|
||||
for (size_t iterator = begin; iterator < end; ++iterator) {
|
||||
if (master_semaphore.IsFree(ticks[iterator])) {
|
||||
ticks[iterator] = master_semaphore.CurrentTick();
|
||||
return iterator;
|
||||
}
|
||||
}
|
||||
return {};
|
||||
};
|
||||
// Try to find a free resource from the hinted position to the end.
|
||||
auto found = search(free_iterator, ticks.size());
|
||||
if (!found) {
|
||||
// Search from beginning to the hinted position.
|
||||
found = search(0, free_iterator);
|
||||
if (!found) {
|
||||
// Both searches failed, the pool is full; handle it.
|
||||
const size_t free_resource = ManageOverflow();
|
||||
|
||||
ticks[free_resource] = master_semaphore.CurrentTick();
|
||||
found = free_resource;
|
||||
}
|
||||
}
|
||||
// Free iterator is hinted to the resource after the one that's been commited.
|
||||
free_iterator = (*found + 1) % ticks.size();
|
||||
return *found;
|
||||
}
|
||||
|
||||
size_t ResourcePool::ManageOverflow() {
|
||||
const size_t old_capacity = ticks.size();
|
||||
Grow();
|
||||
|
||||
// The last entry is guaranted to be free, since it's the first element of the freshly
|
||||
// allocated resources.
|
||||
return old_capacity;
|
||||
}
|
||||
|
||||
void ResourcePool::Grow() {
|
||||
const size_t old_capacity = ticks.size();
|
||||
ticks.resize(old_capacity + grow_step);
|
||||
Allocate(old_capacity, old_capacity + grow_step);
|
||||
}
|
||||
|
||||
} // namespace Vulkan
|
||||
@ -0,0 +1,43 @@
|
||||
// Copyright 2020 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <vector>
|
||||
|
||||
#include "common/common_types.h"
|
||||
|
||||
namespace Vulkan {
|
||||
|
||||
class MasterSemaphore;
|
||||
|
||||
/**
|
||||
* Handles a pool of resources protected by fences. Manages resource overflow allocating more
|
||||
* resources.
|
||||
*/
|
||||
class ResourcePool {
|
||||
public:
|
||||
explicit ResourcePool(MasterSemaphore& master_semaphore, size_t grow_step);
|
||||
virtual ~ResourcePool();
|
||||
|
||||
protected:
|
||||
size_t CommitResource();
|
||||
|
||||
/// Called when a chunk of resources have to be allocated.
|
||||
virtual void Allocate(size_t begin, size_t end) = 0;
|
||||
|
||||
private:
|
||||
/// Manages pool overflow allocating new resources.
|
||||
size_t ManageOverflow();
|
||||
|
||||
/// Allocates a new page of resources.
|
||||
void Grow();
|
||||
|
||||
MasterSemaphore& master_semaphore;
|
||||
size_t grow_step = 0; ///< Number of new resources created after an overflow
|
||||
size_t free_iterator = 0; ///< Hint to where the next free resources is likely to be found
|
||||
std::vector<u64> ticks; ///< Ticks for each resource
|
||||
};
|
||||
|
||||
} // namespace Vulkan
|
||||
Loading…
Reference in New Issue