diff options
Diffstat (limited to 'src/video_core/gpu_thread.h')
-rw-r--r-- | src/video_core/gpu_thread.h | 76 |
1 files changed, 32 insertions, 44 deletions
diff --git a/src/video_core/gpu_thread.h b/src/video_core/gpu_thread.h index 8cd7db1c6..62bcea5bb 100644 --- a/src/video_core/gpu_thread.h +++ b/src/video_core/gpu_thread.h @@ -4,10 +4,8 @@ #pragma once -#include <array> #include <atomic> #include <condition_variable> -#include <memory> #include <mutex> #include <optional> #include <thread> @@ -21,9 +19,12 @@ struct FramebufferConfig; class DmaPusher; } // namespace Tegra -namespace VideoCore { -class RendererBase; -} // namespace VideoCore +namespace Core { +class System; +namespace Timing { +struct EventType; +} // namespace Timing +} // namespace Core namespace VideoCommon::GPUThread { @@ -77,81 +78,68 @@ using CommandData = struct CommandDataContainer { CommandDataContainer() = default; - CommandDataContainer(CommandData&& data) : data{std::move(data)} {} + CommandDataContainer(CommandData&& data, u64 next_fence) + : data{std::move(data)}, fence{next_fence} {} CommandDataContainer& operator=(const CommandDataContainer& t) { data = std::move(t.data); + fence = t.fence; return *this; } CommandData data; + u64 fence{}; }; /// Struct used to synchronize the GPU thread struct SynchState final { std::atomic_bool is_running{true}; std::atomic_int queued_frame_count{}; - std::mutex frames_mutex; + std::mutex synchronization_mutex; std::mutex commands_mutex; std::condition_variable commands_condition; - std::condition_variable frames_condition; + std::condition_variable synchronization_condition; - void IncrementFramesCounter() { - std::lock_guard<std::mutex> lock{frames_mutex}; - ++queued_frame_count; + /// Returns true if the gap in GPU commands is small enough that we can consider the CPU and GPU + /// synchronized. This is entirely empirical. + bool IsSynchronized() const { + constexpr std::size_t max_queue_gap{5}; + return queue.Size() <= max_queue_gap; } - void DecrementFramesCounter() { - { - std::lock_guard<std::mutex> lock{frames_mutex}; - --queued_frame_count; - - if (queued_frame_count) { - return; - } + void TrySynchronize() { + if (IsSynchronized()) { + std::lock_guard<std::mutex> lock{synchronization_mutex}; + synchronization_condition.notify_one(); } - frames_condition.notify_one(); } - void WaitForFrames() { - { - std::lock_guard<std::mutex> lock{frames_mutex}; - if (!queued_frame_count) { - return; - } - } - - // Wait for the GPU to be idle (all commands to be executed) - { - std::unique_lock<std::mutex> lock{frames_mutex}; - frames_condition.wait(lock, [this] { return !queued_frame_count; }); - } - } + void WaitForSynchronization(u64 fence); void SignalCommands() { - { - std::unique_lock<std::mutex> lock{commands_mutex}; - if (queue.Empty()) { - return; - } + if (queue.Empty()) { + return; } commands_condition.notify_one(); } void WaitForCommands() { - std::unique_lock<std::mutex> lock{commands_mutex}; + std::unique_lock lock{commands_mutex}; commands_condition.wait(lock, [this] { return !queue.Empty(); }); } using CommandQueue = Common::SPSCQueue<CommandDataContainer>; CommandQueue queue; + u64 last_fence{}; + std::atomic<u64> signaled_fence{}; }; /// Class used to manage the GPU thread class ThreadManager final { public: - explicit ThreadManager(VideoCore::RendererBase& renderer, Tegra::DmaPusher& dma_pusher); + explicit ThreadManager(Core::System& system, VideoCore::RendererBase& renderer, + Tegra::DmaPusher& dma_pusher); ~ThreadManager(); /// Push GPU command entries to be processed @@ -172,12 +160,12 @@ public: private: /// Pushes a command to be executed by the GPU thread - void PushCommand(CommandData&& command_data); + u64 PushCommand(CommandData&& command_data); private: SynchState state; - VideoCore::RendererBase& renderer; - Tegra::DmaPusher& dma_pusher; + Core::System& system; + Core::Timing::EventType* synchronization_event{}; std::thread thread; std::thread::id thread_id; }; |