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Merge pull request #7019 from ameerj/videocore-jthread 

videocore: Use std::jthread for worker threads
This commit is contained in:
bunnei 2021-09-18 20:37:40 -07:00 committed by GitHub
parent 6e376c27a3 84f7e7e91c
commit a9c3619d26
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 49 additions and 91 deletions
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27
src/common/threadsafe_queue.h
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@ -14,7 +14,7 @@
#include <utility>
namespace Common {
template <typename T>
template <typename T, bool with_stop_token = false>
class SPSCQueue {
public:
SPSCQueue() {
@ -84,7 +84,7 @@ public:
void Wait() {
if (Empty()) {
std::unique_lock lock{cv_mutex};
cv.wait(lock, [this]() { return !Empty(); });
cv.wait(lock, [this] { return !Empty(); });
}
}
@ -95,6 +95,19 @@ public:
return t;
}
T PopWait(std::stop_token stop_token) {
if (Empty()) {
std::unique_lock lock{cv_mutex};
cv.wait(lock, stop_token, [this] { return !Empty(); });
}
if (stop_token.stop_requested()) {
return T{};
}
T t;
Pop(t);
return t;
}
// not thread-safe
void Clear() {
size.store(0);
@ -123,13 +136,13 @@ private:
ElementPtr* read_ptr;
std::atomic_size_t size{0};
std::mutex cv_mutex;
std::condition_variable cv;
std::conditional_t<with_stop_token, std::condition_variable_any, std::condition_variable> cv;
};
// a simple thread-safe,
// single reader, multiple writer queue
template <typename T>
template <typename T, bool with_stop_token = false>
class MPSCQueue {
public:
[[nodiscard]] std::size_t Size() const {
@ -166,13 +179,17 @@ public:
return spsc_queue.PopWait();
}
T PopWait(std::stop_token stop_token) {
return spsc_queue.PopWait(stop_token);
}
// not thread-safe
void Clear() {
spsc_queue.Clear();
}
private:
SPSCQueue<T> spsc_queue;
SPSCQueue<T, with_stop_token> spsc_queue;
std::mutex write_lock;
};
} // namespace Common

6
src/core/core.cpp
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@ -305,10 +305,7 @@ struct System::Impl {
is_powered_on = false;
exit_lock = false;
if (gpu_core) {
gpu_core->ShutDown();
}
gpu_core.reset();
services.reset();
service_manager.reset();
cheat_engine.reset();
@ -317,7 +314,6 @@ struct System::Impl {
time_manager.Shutdown();
core_timing.Shutdown();
app_loader.reset();
gpu_core.reset();
perf_stats.reset();
kernel.Shutdown();
memory.Reset();

8
src/video_core/gpu.cpp
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@ -531,14 +531,6 @@ void GPU::TriggerCpuInterrupt(const u32 syncpoint_id, const u32 value) const {
interrupt_manager.GPUInterruptSyncpt(syncpoint_id, value);
}
void GPU::ShutDown() {
// Signal that threads should no longer block on syncpoint fences
shutting_down.store(true, std::memory_order_relaxed);
sync_cv.notify_all();
gpu_thread.ShutDown();
}
void GPU::OnCommandListEnd() {
if (is_async) {
// This command only applies to asynchronous GPU mode

3
src/video_core/gpu.h
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@ -219,9 +219,6 @@ public:
return *shader_notify;
}
// Stops the GPU execution and waits for the GPU to finish working
void ShutDown();
/// Allows the CPU/NvFlinger to wait on the GPU before presenting a frame.
void WaitFence(u32 syncpoint_id, u32 value);

57
src/video_core/gpu_thread.cpp
View File

@ -17,9 +17,9 @@
namespace VideoCommon::GPUThread {
/// Runs the GPU thread
static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
Core::Frontend::GraphicsContext& context, Tegra::DmaPusher& dma_pusher,
SynchState& state) {
static void RunThread(std::stop_token stop_token, Core::System& system,
VideoCore::RendererBase& renderer, Core::Frontend::GraphicsContext& context,
Tegra::DmaPusher& dma_pusher, SynchState& state) {
std::string name = "yuzu:GPU";
MicroProfileOnThreadCreate(name.c_str());
SCOPE_EXIT({ MicroProfileOnThreadExit(); });
@ -28,20 +28,14 @@ static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
system.RegisterHostThread();
// Wait for first GPU command before acquiring the window context
state.queue.Wait();
// If emulation was stopped during disk shader loading, abort before trying to acquire context
if (!state.is_running) {
return;
}
auto current_context = context.Acquire();
VideoCore::RasterizerInterface* const rasterizer = renderer.ReadRasterizer();
CommandDataContainer next;
while (state.is_running) {
next = state.queue.PopWait();
while (!stop_token.stop_requested()) {
CommandDataContainer next = state.queue.PopWait(stop_token);
if (stop_token.stop_requested()) {
break;
}
if (auto* submit_list = std::get_if<SubmitListCommand>(&next.data)) {
dma_pusher.Push(std::move(submit_list->entries));
dma_pusher.DispatchCalls();
@ -55,8 +49,6 @@ static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
rasterizer->FlushRegion(flush->addr, flush->size);
} else if (const auto* invalidate = std::get_if<InvalidateRegionCommand>(&next.data)) {
rasterizer->OnCPUWrite(invalidate->addr, invalidate->size);
} else if (std::holds_alternative<EndProcessingCommand>(next.data)) {
ASSERT(state.is_running == false);
} else {
UNREACHABLE();
}
@ -73,16 +65,14 @@ static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
ThreadManager::ThreadManager(Core::System& system_, bool is_async_)
: system{system_}, is_async{is_async_} {}
ThreadManager::~ThreadManager() {
ShutDown();
}
ThreadManager::~ThreadManager() = default;
void ThreadManager::StartThread(VideoCore::RendererBase& renderer,
Core::Frontend::GraphicsContext& context,
Tegra::DmaPusher& dma_pusher) {
rasterizer = renderer.ReadRasterizer();
thread = std::thread(RunThread, std::ref(system), std::ref(renderer), std::ref(context),
std::ref(dma_pusher), std::ref(state));
thread = std::jthread(RunThread, std::ref(system), std::ref(renderer), std::ref(context),
std::ref(dma_pusher), std::ref(state));
}
void ThreadManager::SubmitList(Tegra::CommandList&& entries) {
@ -117,26 +107,6 @@ void ThreadManager::FlushAndInvalidateRegion(VAddr addr, u64 size) {
rasterizer->OnCPUWrite(addr, size);
}
void ThreadManager::ShutDown() {
if (!state.is_running) {
return;
}
{
std::lock_guard lk(state.write_lock);
state.is_running = false;
state.cv.notify_all();
}
if (!thread.joinable()) {
return;
}
// Notify GPU thread that a shutdown is pending
PushCommand(EndProcessingCommand());
thread.join();
}
void ThreadManager::OnCommandListEnd() {
PushCommand(OnCommandListEndCommand());
}
@ -152,9 +122,8 @@ u64 ThreadManager::PushCommand(CommandData&& command_data, bool block) {
state.queue.Push(CommandDataContainer(std::move(command_data), fence, block));
if (block) {
state.cv.wait(lk, [this, fence] {
return fence <= state.signaled_fence.load(std::memory_order_relaxed) ||
!state.is_running;
state.cv.wait(lk, thread.get_stop_token(), [this, fence] {
return fence <= state.signaled_fence.load(std::memory_order_relaxed);
});
}

13
src/video_core/gpu_thread.h
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@ -33,9 +33,6 @@ class RendererBase;
namespace VideoCommon::GPUThread {
/// Command to signal to the GPU thread that processing has ended
struct EndProcessingCommand final {};
/// Command to signal to the GPU thread that a command list is ready for processing
struct SubmitListCommand final {
explicit SubmitListCommand(Tegra::CommandList&& entries_) : entries{std::move(entries_)} {}
@ -83,7 +80,7 @@ struct OnCommandListEndCommand final {};
struct GPUTickCommand final {};
using CommandData =
std::variant<EndProcessingCommand, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
std::variant<std::monostate, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
InvalidateRegionCommand, FlushAndInvalidateRegionCommand, OnCommandListEndCommand,
GPUTickCommand>;
@ -100,14 +97,12 @@ struct CommandDataContainer {
/// Struct used to synchronize the GPU thread
struct SynchState final {
std::atomic_bool is_running{true};
using CommandQueue = Common::SPSCQueue<CommandDataContainer>;
using CommandQueue = Common::SPSCQueue<CommandDataContainer, true>;
std::mutex write_lock;
CommandQueue queue;
u64 last_fence{};
std::atomic<u64> signaled_fence{};
std::condition_variable cv;
std::condition_variable_any cv;
};
/// Class used to manage the GPU thread
@ -149,7 +144,7 @@ private:
VideoCore::RasterizerInterface* rasterizer = nullptr;
SynchState state;
std::thread thread;
std::jthread thread;
};
} // namespace VideoCommon::GPUThread

19
src/video_core/renderer_vulkan/vk_scheduler.cpp
View File

@ -43,17 +43,10 @@ VKScheduler::VKScheduler(const Device& device_, StateTracker& state_tracker_)
command_pool{std::make_unique<CommandPool>(*master_semaphore, device)} {
AcquireNewChunk();
AllocateWorkerCommandBuffer();
worker_thread = std::thread(&VKScheduler::WorkerThread, this);
worker_thread = std::jthread([this](std::stop_token token) { WorkerThread(token); });
}
VKScheduler::~VKScheduler() {
{
std::lock_guard lock{work_mutex};
quit = true;
}
work_cv.notify_all();
worker_thread.join();
}
VKScheduler::~VKScheduler() = default;
void VKScheduler::Flush(VkSemaphore signal_semaphore, VkSemaphore wait_semaphore) {
SubmitExecution(signal_semaphore, wait_semaphore);
@ -135,7 +128,7 @@ bool VKScheduler::UpdateGraphicsPipeline(GraphicsPipeline* pipeline) {
return true;
}
void VKScheduler::WorkerThread() {
void VKScheduler::WorkerThread(std::stop_token stop_token) {
Common::SetCurrentThreadName("yuzu:VulkanWorker");
do {
if (work_queue.empty()) {
@ -144,8 +137,8 @@ void VKScheduler::WorkerThread() {
std::unique_ptr<CommandChunk> work;
{
std::unique_lock lock{work_mutex};
work_cv.wait(lock, [this] { return !work_queue.empty() || quit; });
if (quit) {
work_cv.wait(lock, stop_token, [this] { return !work_queue.empty(); });
if (stop_token.stop_requested()) {
continue;
}
work = std::move(work_queue.front());
@ -158,7 +151,7 @@ void VKScheduler::WorkerThread() {
}
std::lock_guard reserve_lock{reserve_mutex};
chunk_reserve.push_back(std::move(work));
} while (!quit);
} while (!stop_token.stop_requested());
}
void VKScheduler::AllocateWorkerCommandBuffer() {

7
src/video_core/renderer_vulkan/vk_scheduler.h
View File

@ -187,7 +187,7 @@ private:
GraphicsPipeline* graphics_pipeline = nullptr;
};
void WorkerThread();
void WorkerThread(std::stop_token stop_token);
void AllocateWorkerCommandBuffer();
@ -212,7 +212,7 @@ private:
vk::CommandBuffer current_cmdbuf;
std::unique_ptr<CommandChunk> chunk;
std::thread worker_thread;
std::jthread worker_thread;
State state;
@ -224,9 +224,8 @@ private:
std::vector<std::unique_ptr<CommandChunk>> chunk_reserve;
std::mutex reserve_mutex;
std::mutex work_mutex;
std::condition_variable work_cv;
std::condition_variable_any work_cv;
std::condition_variable wait_cv;
std::atomic_bool quit{};
};
} // namespace Vulkan