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dolphin/Source/Core/VideoBackends/Vulkan/CommandBufferManager.cpp

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// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "VideoBackends/Vulkan/CommandBufferManager.h"
#include <array>
#include <cstdint>
#include "Common/Assert.h"
#include "Common/MsgHandler.h"
#include "Common/Thread.h"
#include "VideoBackends/Vulkan/VulkanContext.h"
namespace Vulkan
{
CommandBufferManager::CommandBufferManager(bool use_threaded_submission)
: m_submit_semaphore(1, 1), m_use_threaded_submission(use_threaded_submission)
{
}
CommandBufferManager::~CommandBufferManager()
{
// If the worker thread is enabled, stop and block until it exits.
if (m_use_threaded_submission)
{
m_submit_loop->Stop();
m_submit_thread.join();
}
DestroyCommandBuffers();
}
bool CommandBufferManager::Initialize()
{
if (!CreateCommandBuffers())
return false;
if (m_use_threaded_submission && !CreateSubmitThread())
return false;
return true;
}
bool CommandBufferManager::CreateCommandBuffers()
{
static constexpr VkSemaphoreCreateInfo semaphore_create_info = {
VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO, nullptr, 0};
VkDevice device = g_vulkan_context->GetDevice();
VkResult res;
for (FrameResources& resources : m_frame_resources)
{
resources.init_command_buffer_used = false;
resources.semaphore_used = false;
VkCommandPoolCreateInfo pool_info = {VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO, nullptr, 0,
g_vulkan_context->GetGraphicsQueueFamilyIndex()};
res = vkCreateCommandPool(g_vulkan_context->GetDevice(), &pool_info, nullptr,
&resources.command_pool);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkCreateCommandPool failed: ");
return false;
}
VkCommandBufferAllocateInfo buffer_info = {
VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO, nullptr, resources.command_pool,
VK_COMMAND_BUFFER_LEVEL_PRIMARY, static_cast<uint32_t>(resources.command_buffers.size())};
res = vkAllocateCommandBuffers(device, &buffer_info, resources.command_buffers.data());
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkAllocateCommandBuffers failed: ");
return false;
}
VkFenceCreateInfo fence_info = {VK_STRUCTURE_TYPE_FENCE_CREATE_INFO, nullptr,
VK_FENCE_CREATE_SIGNALED_BIT};
res = vkCreateFence(device, &fence_info, nullptr, &resources.fence);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkCreateFence failed: ");
return false;
}
res = vkCreateSemaphore(device, &semaphore_create_info, nullptr, &resources.semaphore);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkCreateSemaphore failed: ");
return false;
}
// TODO: A better way to choose the number of descriptors.
const std::array<VkDescriptorPoolSize, 5> pool_sizes{{
{VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 500000},
{VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 500000},
{VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 16},
{VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 16384},
{VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 16384},
}};
const VkDescriptorPoolCreateInfo pool_create_info = {
VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO,
nullptr,
0,
100000, // tweak this
static_cast<u32>(pool_sizes.size()),
pool_sizes.data(),
};
res = vkCreateDescriptorPool(device, &pool_create_info, nullptr, &resources.descriptor_pool);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkCreateDescriptorPool failed: ");
return false;
}
}
res = vkCreateSemaphore(device, &semaphore_create_info, nullptr, &m_present_semaphore);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkCreateSemaphore failed: ");
return false;
}
// Activate the first command buffer. ActivateCommandBuffer moves forward, so start with the last
m_current_frame = static_cast<u32>(m_frame_resources.size()) - 1;
BeginCommandBuffer();
return true;
}
void CommandBufferManager::DestroyCommandBuffers()
{
VkDevice device = g_vulkan_context->GetDevice();
for (FrameResources& resources : m_frame_resources)
{
// The Vulkan spec section 5.2 says: "When a pool is destroyed, all command buffers allocated
// from the pool are freed.". So we don't need to free the command buffers, just the pools.
// We destroy the command pool first, to avoid any warnings from the validation layers about
// objects which are pending destruction being in-use.
if (resources.command_pool != VK_NULL_HANDLE)
vkDestroyCommandPool(device, resources.command_pool, nullptr);
// Destroy any pending objects.
for (auto& it : resources.cleanup_resources)
it();
if (resources.semaphore != VK_NULL_HANDLE)
vkDestroySemaphore(device, resources.semaphore, nullptr);
if (resources.fence != VK_NULL_HANDLE)
vkDestroyFence(device, resources.fence, nullptr);
if (resources.descriptor_pool != VK_NULL_HANDLE)
vkDestroyDescriptorPool(device, resources.descriptor_pool, nullptr);
}
vkDestroySemaphore(device, m_present_semaphore, nullptr);
}
VkDescriptorSet CommandBufferManager::AllocateDescriptorSet(VkDescriptorSetLayout set_layout)
{
VkDescriptorSetAllocateInfo allocate_info = {
VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO, nullptr,
m_frame_resources[m_current_frame].descriptor_pool, 1, &set_layout};
VkDescriptorSet descriptor_set;
VkResult res =
vkAllocateDescriptorSets(g_vulkan_context->GetDevice(), &allocate_info, &descriptor_set);
if (res != VK_SUCCESS)
{
// Failing to allocate a descriptor set is not a fatal error, we can
// recover by moving to the next command buffer.
return VK_NULL_HANDLE;
}
return descriptor_set;
}
bool CommandBufferManager::CreateSubmitThread()
{
m_submit_loop = std::make_unique<Common::BlockingLoop>();
m_submit_thread = std::thread([this]() {
Common::SetCurrentThreadName("Vulkan CommandBufferManager SubmitThread");
m_submit_loop->Run([this]() {
PendingCommandBufferSubmit submit;
{
std::lock_guard<std::mutex> guard(m_pending_submit_lock);
if (m_pending_submits.empty())
{
m_submit_loop->AllowSleep();
return;
}
submit = m_pending_submits.front();
m_pending_submits.pop_front();
}
SubmitCommandBuffer(submit.command_buffer_index, submit.present_swap_chain,
submit.present_image_index);
});
});
return true;
}
void CommandBufferManager::WaitForWorkerThreadIdle()
{
// Drain the semaphore, then allow another request in the future.
m_submit_semaphore.Wait();
m_submit_semaphore.Post();
}
void CommandBufferManager::WaitForFenceCounter(u64 fence_counter)
{
if (m_completed_fence_counter >= fence_counter)
return;
// Find the first command buffer which covers this counter value.
u32 index = (m_current_frame + 1) % NUM_COMMAND_BUFFERS;
while (index != m_current_frame)
{
if (m_frame_resources[index].fence_counter >= fence_counter)
break;
index = (index + 1) % NUM_COMMAND_BUFFERS;
}
ASSERT(index != m_current_frame);
WaitForCommandBufferCompletion(index);
}
void CommandBufferManager::WaitForCommandBufferCompletion(u32 index)
{
// Ensure this command buffer has been submitted.
WaitForWorkerThreadIdle();
// Wait for this command buffer to be completed.
VkResult res = vkWaitForFences(g_vulkan_context->GetDevice(), 1, &m_frame_resources[index].fence,
VK_TRUE, UINT64_MAX);
if (res != VK_SUCCESS)
LOG_VULKAN_ERROR(res, "vkWaitForFences failed: ");
// Clean up any resources for command buffers between the last known completed buffer and this
// now-completed command buffer. If we use >2 buffers, this may be more than one buffer.
const u64 now_completed_counter = m_frame_resources[index].fence_counter;
u32 cleanup_index = (m_current_frame + 1) % NUM_COMMAND_BUFFERS;
while (cleanup_index != m_current_frame)
{
FrameResources& resources = m_frame_resources[cleanup_index];
if (resources.fence_counter > now_completed_counter)
break;
if (resources.fence_counter > m_completed_fence_counter)
{
for (auto& it : resources.cleanup_resources)
it();
resources.cleanup_resources.clear();
}
cleanup_index = (cleanup_index + 1) % NUM_COMMAND_BUFFERS;
}
m_completed_fence_counter = now_completed_counter;
}
void CommandBufferManager::SubmitCommandBuffer(bool submit_on_worker_thread,
bool wait_for_completion,
VkSwapchainKHR present_swap_chain,
uint32_t present_image_index)
{
// End the current command buffer.
FrameResources& resources = m_frame_resources[m_current_frame];
for (VkCommandBuffer command_buffer : resources.command_buffers)
{
VkResult res = vkEndCommandBuffer(command_buffer);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkEndCommandBuffer failed: ");
PanicAlertFmt("Failed to end command buffer");
}
}
// Grab the semaphore before submitting command buffer either on-thread or off-thread.
// This prevents a race from occurring where a second command buffer is executed
// before the worker thread has woken and executed the first one yet.
m_submit_semaphore.Wait();
// Submitting off-thread?
if (m_use_threaded_submission && submit_on_worker_thread && !wait_for_completion)
{
// Push to the pending submit queue.
{
std::lock_guard<std::mutex> guard(m_pending_submit_lock);
m_pending_submits.push_back({present_swap_chain, present_image_index, m_current_frame});
}
// Wake up the worker thread for a single iteration.
m_submit_loop->Wakeup();
}
else
{
// Pass through to normal submission path.
SubmitCommandBuffer(m_current_frame, present_swap_chain, present_image_index);
if (wait_for_completion)
WaitForCommandBufferCompletion(m_current_frame);
}
// Switch to next cmdbuffer.
BeginCommandBuffer();
}
void CommandBufferManager::SubmitCommandBuffer(u32 command_buffer_index,
VkSwapchainKHR present_swap_chain,
u32 present_image_index)
{
FrameResources& resources = m_frame_resources[command_buffer_index];
// This may be executed on the worker thread, so don't modify any state of the manager class.
uint32_t wait_bits = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
VkSubmitInfo submit_info = {VK_STRUCTURE_TYPE_SUBMIT_INFO,
nullptr,
0,
nullptr,
&wait_bits,
static_cast<u32>(resources.command_buffers.size()),
resources.command_buffers.data(),
0,
nullptr};
// If the init command buffer did not have any commands recorded, don't submit it.
if (!resources.init_command_buffer_used)
{
submit_info.commandBufferCount = 1;
submit_info.pCommandBuffers = &resources.command_buffers[1];
}
if (resources.semaphore_used)
{
submit_info.pWaitSemaphores = &resources.semaphore;
submit_info.waitSemaphoreCount = 1;
}
if (present_swap_chain != VK_NULL_HANDLE)
{
submit_info.signalSemaphoreCount = 1;
submit_info.pSignalSemaphores = &m_present_semaphore;
}
VkResult res =
vkQueueSubmit(g_vulkan_context->GetGraphicsQueue(), 1, &submit_info, resources.fence);
if (res != VK_SUCCESS)
{
LOG_VULKAN_ERROR(res, "vkQueueSubmit failed: ");
PanicAlertFmt("Failed to submit command buffer.");
}
// Do we have a swap chain to present?
if (present_swap_chain != VK_NULL_HANDLE)
{
// Should have a signal semaphore.
VkPresentInfoKHR present_info = {VK_STRUCTURE_TYPE_PRESENT_INFO_KHR,
nullptr,
1,
&m_present_semaphore,
1,
&present_swap_chain,
&present_image_index,
nullptr};
m_last_present_result = vkQueuePresentKHR(g_vulkan_context->GetPresentQueue(), &present_info);
if (m_last_present_result != VK_SUCCESS)
{
// VK_ERROR_OUT_OF_DATE_KHR is not fatal, just means we need to recreate our swap chain.
if (m_last_present_result != VK_ERROR_OUT_OF_DATE_KHR &&
m_last_present_result != VK_SUBOPTIMAL_KHR &&
m_last_present_result != VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT)
{
LOG_VULKAN_ERROR(m_last_present_result, "vkQueuePresentKHR failed: ");
}
// Don't treat VK_SUBOPTIMAL_KHR as fatal on Android. Android 10+ requires prerotation.
// See https://twitter.com/Themaister/status/1207062674011574273
#ifdef VK_USE_PLATFORM_ANDROID_KHR
if (m_last_present_result != VK_SUBOPTIMAL_KHR)
m_last_present_failed.Set();
#else
m_last_present_failed.Set();
#endif
}
}
// Command buffer has been queued, so permit the next one.
m_submit_semaphore.Post();
}
void CommandBufferManager::BeginCommandBuffer()
{
// Move to the next command buffer.
const u32 next_buffer_index = (m_current_frame + 1) % NUM_COMMAND_BUFFERS;
FrameResources& resources = m_frame_resources[next_buffer_index];
// Wait for the GPU to finish with all resources for this command buffer.
if (resources.fence_counter > m_completed_fence_counter)
WaitForCommandBufferCompletion(next_buffer_index);
// Reset fence to unsignaled before starting.
VkResult res = vkResetFences(g_vulkan_context->GetDevice(), 1, &resources.fence);
if (res != VK_SUCCESS)
LOG_VULKAN_ERROR(res, "vkResetFences failed: ");
// Reset command pools to beginning since we can re-use the memory now
res = vkResetCommandPool(g_vulkan_context->GetDevice(), resources.command_pool, 0);
if (res != VK_SUCCESS)
LOG_VULKAN_ERROR(res, "vkResetCommandPool failed: ");
// Enable commands to be recorded to the two buffers again.
VkCommandBufferBeginInfo begin_info = {VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO, nullptr,
VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT, nullptr};
for (VkCommandBuffer command_buffer : resources.command_buffers)
{
res = vkBeginCommandBuffer(command_buffer, &begin_info);
if (res != VK_SUCCESS)
LOG_VULKAN_ERROR(res, "vkBeginCommandBuffer failed: ");
}
// Also can do the same for the descriptor pools
res = vkResetDescriptorPool(g_vulkan_context->GetDevice(), resources.descriptor_pool, 0);
if (res != VK_SUCCESS)
LOG_VULKAN_ERROR(res, "vkResetDescriptorPool failed: ");
// Reset upload command buffer state
resources.init_command_buffer_used = false;
resources.semaphore_used = false;
resources.fence_counter = m_next_fence_counter++;
m_current_frame = next_buffer_index;
}
void CommandBufferManager::DeferBufferDestruction(VkBuffer object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkDestroyBuffer(g_vulkan_context->GetDevice(), object, nullptr); });
}
void CommandBufferManager::DeferBufferViewDestruction(VkBufferView object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkDestroyBufferView(g_vulkan_context->GetDevice(), object, nullptr); });
}
void CommandBufferManager::DeferDeviceMemoryDestruction(VkDeviceMemory object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkFreeMemory(g_vulkan_context->GetDevice(), object, nullptr); });
}
void CommandBufferManager::DeferFramebufferDestruction(VkFramebuffer object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkDestroyFramebuffer(g_vulkan_context->GetDevice(), object, nullptr); });
}
void CommandBufferManager::DeferImageDestruction(VkImage object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkDestroyImage(g_vulkan_context->GetDevice(), object, nullptr); });
}
void CommandBufferManager::DeferImageViewDestruction(VkImageView object)
{
FrameResources& resources = m_frame_resources[m_current_frame];
resources.cleanup_resources.push_back(
[object]() { vkDestroyImageView(g_vulkan_context->GetDevice(), object, nullptr); });
}
std::unique_ptr<CommandBufferManager> g_command_buffer_mgr;
} // namespace Vulkan
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