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VideoCommon/Fifo: Refactor to class, move to Core::System.

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This commit is contained in:
Admiral H. Curtiss
2022-12-09 20:01:25 +01:00
parent d250e69ddf
commit 5624dd6d39
18 changed files with 377 additions and 300 deletions
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389
Source/Core/VideoCommon/Fifo.cpp
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@ -34,88 +34,47 @@
namespace Fifo
{
static constexpr u32 FIFO_SIZE = 2 * 1024 * 1024;
static constexpr int GPU_TIME_SLOT_SIZE = 1000;
static Common::BlockingLoop s_gpu_mainloop;
FifoManager::FifoManager() = default;
FifoManager::~FifoManager() = default;
static Common::Flag s_emu_running_state;
// Most of this array is unlikely to be faulted in...
static u8 s_fifo_aux_data[FIFO_SIZE];
static u8* s_fifo_aux_write_ptr;
static u8* s_fifo_aux_read_ptr;
// This could be in SConfig, but it depends on multiple settings
// and can change at runtime.
static bool s_use_deterministic_gpu_thread;
static CoreTiming::EventType* s_event_sync_gpu;
// STATE_TO_SAVE
static u8* s_video_buffer;
static u8* s_video_buffer_read_ptr;
static std::atomic<u8*> s_video_buffer_write_ptr;
static std::atomic<u8*> s_video_buffer_seen_ptr;
static u8* s_video_buffer_pp_read_ptr;
// The read_ptr is always owned by the GPU thread. In normal mode, so is the
// write_ptr, despite it being atomic. In deterministic GPU thread mode,
// things get a bit more complicated:
// - The seen_ptr is written by the GPU thread, and points to what it's already
// processed as much of as possible - in the case of a partial command which
// caused it to stop, not the same as the read ptr. It's written by the GPU,
// under the lock, and updating the cond.
// - The write_ptr is written by the CPU thread after it copies data from the
// FIFO. Maybe someday it will be under the lock. For now, because RunGpuLoop
// polls, it's just atomic.
// - The pp_read_ptr is the CPU preprocessing version of the read_ptr.
static std::atomic<int> s_sync_ticks;
static bool s_syncing_suspended;
static Common::Event s_sync_wakeup_event;
static std::optional<size_t> s_config_callback_id = std::nullopt;
static bool s_config_sync_gpu = false;
static int s_config_sync_gpu_max_distance = 0;
static int s_config_sync_gpu_min_distance = 0;
static float s_config_sync_gpu_overclock = 0.0f;
static void RefreshConfig()
void FifoManager::RefreshConfig()
{
s_config_sync_gpu = Config::Get(Config::MAIN_SYNC_GPU);
s_config_sync_gpu_max_distance = Config::Get(Config::MAIN_SYNC_GPU_MAX_DISTANCE);
s_config_sync_gpu_min_distance = Config::Get(Config::MAIN_SYNC_GPU_MIN_DISTANCE);
s_config_sync_gpu_overclock = Config::Get(Config::MAIN_SYNC_GPU_OVERCLOCK);
m_config_sync_gpu = Config::Get(Config::MAIN_SYNC_GPU);
m_config_sync_gpu_max_distance = Config::Get(Config::MAIN_SYNC_GPU_MAX_DISTANCE);
m_config_sync_gpu_min_distance = Config::Get(Config::MAIN_SYNC_GPU_MIN_DISTANCE);
m_config_sync_gpu_overclock = Config::Get(Config::MAIN_SYNC_GPU_OVERCLOCK);
}
void DoState(PointerWrap& p)
void FifoManager::DoState(PointerWrap& p)
{
p.DoArray(s_video_buffer, FIFO_SIZE);
u8* write_ptr = s_video_buffer_write_ptr;
p.DoPointer(write_ptr, s_video_buffer);
s_video_buffer_write_ptr = write_ptr;
p.DoPointer(s_video_buffer_read_ptr, s_video_buffer);
if (p.IsReadMode() && s_use_deterministic_gpu_thread)
p.DoArray(m_video_buffer, FIFO_SIZE);
u8* write_ptr = m_video_buffer_write_ptr;
p.DoPointer(write_ptr, m_video_buffer);
m_video_buffer_write_ptr = write_ptr;
p.DoPointer(m_video_buffer_read_ptr, m_video_buffer);
if (p.IsReadMode() && m_use_deterministic_gpu_thread)
{
// We're good and paused, right?
s_video_buffer_seen_ptr = s_video_buffer_pp_read_ptr = s_video_buffer_read_ptr;
m_video_buffer_seen_ptr = m_video_buffer_pp_read_ptr = m_video_buffer_read_ptr;
}
p.Do(s_sync_ticks);
p.Do(s_syncing_suspended);
p.Do(m_sync_ticks);
p.Do(m_syncing_suspended);
}
void PauseAndLock(bool doLock, bool unpauseOnUnlock)
void FifoManager::PauseAndLock(bool doLock, bool unpauseOnUnlock)
{
if (doLock)
{
SyncGPU(SyncGPUReason::Other);
EmulatorState(false);
if (!Core::System::GetInstance().IsDualCoreMode() || s_use_deterministic_gpu_thread)
if (!Core::System::GetInstance().IsDualCoreMode() || m_use_deterministic_gpu_thread)
return;
s_gpu_mainloop.WaitYield(std::chrono::milliseconds(100), Host_YieldToUI);
m_gpu_mainloop.WaitYield(std::chrono::milliseconds(100), Host_YieldToUI);
}
else
{
@ -124,44 +83,44 @@ void PauseAndLock(bool doLock, bool unpauseOnUnlock)
}
}
void Init()
void FifoManager::Init()
{
if (!s_config_callback_id)
s_config_callback_id = Config::AddConfigChangedCallback(RefreshConfig);
if (!m_config_callback_id)
m_config_callback_id = Config::AddConfigChangedCallback([this] { RefreshConfig(); });
RefreshConfig();
// Padded so that SIMD overreads in the vertex loader are safe
s_video_buffer = static_cast<u8*>(Common::AllocateMemoryPages(FIFO_SIZE + 4));
m_video_buffer = static_cast<u8*>(Common::AllocateMemoryPages(FIFO_SIZE + 4));
ResetVideoBuffer();
if (Core::System::GetInstance().IsDualCoreMode())
s_gpu_mainloop.Prepare();
s_sync_ticks.store(0);
m_gpu_mainloop.Prepare();
m_sync_ticks.store(0);
}
void Shutdown()
void FifoManager::Shutdown()
{
if (s_gpu_mainloop.IsRunning())
if (m_gpu_mainloop.IsRunning())
PanicAlertFmt("FIFO shutting down while active");
Common::FreeMemoryPages(s_video_buffer, FIFO_SIZE + 4);
s_video_buffer = nullptr;
s_video_buffer_write_ptr = nullptr;
s_video_buffer_pp_read_ptr = nullptr;
s_video_buffer_read_ptr = nullptr;
s_video_buffer_seen_ptr = nullptr;
s_fifo_aux_write_ptr = nullptr;
s_fifo_aux_read_ptr = nullptr;
Common::FreeMemoryPages(m_video_buffer, FIFO_SIZE + 4);
m_video_buffer = nullptr;
m_video_buffer_write_ptr = nullptr;
m_video_buffer_pp_read_ptr = nullptr;
m_video_buffer_read_ptr = nullptr;
m_video_buffer_seen_ptr = nullptr;
m_fifo_aux_write_ptr = nullptr;
m_fifo_aux_read_ptr = nullptr;
if (s_config_callback_id)
if (m_config_callback_id)
{
Config::RemoveConfigChangedCallback(*s_config_callback_id);
s_config_callback_id = std::nullopt;
Config::RemoveConfigChangedCallback(*m_config_callback_id);
m_config_callback_id = std::nullopt;
}
}
// May be executed from any thread, even the graphics thread.
// Created to allow for self shutdown.
void ExitGpuLoop()
void FifoManager::ExitGpuLoop()
{
auto& system = Core::System::GetInstance();
auto& command_processor = system.GetCommandProcessor();
@ -172,68 +131,68 @@ void ExitGpuLoop()
FlushGpu();
// Terminate GPU thread loop
s_emu_running_state.Set();
s_gpu_mainloop.Stop(s_gpu_mainloop.kNonBlock);
m_emu_running_state.Set();
m_gpu_mainloop.Stop(m_gpu_mainloop.kNonBlock);
}
void EmulatorState(bool running)
void FifoManager::EmulatorState(bool running)
{
s_emu_running_state.Set(running);
m_emu_running_state.Set(running);
if (running)
s_gpu_mainloop.Wakeup();
m_gpu_mainloop.Wakeup();
else
s_gpu_mainloop.AllowSleep();
m_gpu_mainloop.AllowSleep();
}
void SyncGPU(SyncGPUReason reason, bool may_move_read_ptr)
void FifoManager::SyncGPU(SyncGPUReason reason, bool may_move_read_ptr)
{
if (s_use_deterministic_gpu_thread)
if (m_use_deterministic_gpu_thread)
{
s_gpu_mainloop.Wait();
if (!s_gpu_mainloop.IsRunning())
m_gpu_mainloop.Wait();
if (!m_gpu_mainloop.IsRunning())
return;
// Opportunistically reset FIFOs so we don't wrap around.
if (may_move_read_ptr && s_fifo_aux_write_ptr != s_fifo_aux_read_ptr)
if (may_move_read_ptr && m_fifo_aux_write_ptr != m_fifo_aux_read_ptr)
{
PanicAlertFmt("Aux FIFO not synced ({}, {})", fmt::ptr(s_fifo_aux_write_ptr),
fmt::ptr(s_fifo_aux_read_ptr));
PanicAlertFmt("Aux FIFO not synced ({}, {})", fmt::ptr(m_fifo_aux_write_ptr),
fmt::ptr(m_fifo_aux_read_ptr));
}
memmove(s_fifo_aux_data, s_fifo_aux_read_ptr, s_fifo_aux_write_ptr - s_fifo_aux_read_ptr);
s_fifo_aux_write_ptr -= (s_fifo_aux_read_ptr - s_fifo_aux_data);
s_fifo_aux_read_ptr = s_fifo_aux_data;
memmove(m_fifo_aux_data, m_fifo_aux_read_ptr, m_fifo_aux_write_ptr - m_fifo_aux_read_ptr);
m_fifo_aux_write_ptr -= (m_fifo_aux_read_ptr - m_fifo_aux_data);
m_fifo_aux_read_ptr = m_fifo_aux_data;
if (may_move_read_ptr)
{
u8* write_ptr = s_video_buffer_write_ptr;
u8* write_ptr = m_video_buffer_write_ptr;
// what's left over in the buffer
size_t size = write_ptr - s_video_buffer_pp_read_ptr;
size_t size = write_ptr - m_video_buffer_pp_read_ptr;
memmove(s_video_buffer, s_video_buffer_pp_read_ptr, size);
memmove(m_video_buffer, m_video_buffer_pp_read_ptr, size);
// This change always decreases the pointers. We write seen_ptr
// after write_ptr here, and read it before in RunGpuLoop, so
// 'write_ptr > seen_ptr' there cannot become spuriously true.
s_video_buffer_write_ptr = write_ptr = s_video_buffer + size;
s_video_buffer_pp_read_ptr = s_video_buffer;
s_video_buffer_read_ptr = s_video_buffer;
s_video_buffer_seen_ptr = write_ptr;
m_video_buffer_write_ptr = write_ptr = m_video_buffer + size;
m_video_buffer_pp_read_ptr = m_video_buffer;
m_video_buffer_read_ptr = m_video_buffer;
m_video_buffer_seen_ptr = write_ptr;
}
}
}
void PushFifoAuxBuffer(const void* ptr, size_t size)
void FifoManager::PushFifoAuxBuffer(const void* ptr, size_t size)
{
if (size > (size_t)(s_fifo_aux_data + FIFO_SIZE - s_fifo_aux_write_ptr))
if (size > (size_t)(m_fifo_aux_data + FIFO_SIZE - m_fifo_aux_write_ptr))
{
SyncGPU(SyncGPUReason::AuxSpace, /* may_move_read_ptr */ false);
if (!s_gpu_mainloop.IsRunning())
if (!m_gpu_mainloop.IsRunning())
{
// GPU is shutting down
return;
}
if (size > (size_t)(s_fifo_aux_data + FIFO_SIZE - s_fifo_aux_write_ptr))
if (size > (size_t)(m_fifo_aux_data + FIFO_SIZE - m_fifo_aux_write_ptr))
{
// That will sync us up to the last 32 bytes, so this short region
// of FIFO would have to point to a 2MB display list or something.
@ -241,63 +200,63 @@ void PushFifoAuxBuffer(const void* ptr, size_t size)
return;
}
}
memcpy(s_fifo_aux_write_ptr, ptr, size);
s_fifo_aux_write_ptr += size;
memcpy(m_fifo_aux_write_ptr, ptr, size);
m_fifo_aux_write_ptr += size;
}
void* PopFifoAuxBuffer(size_t size)
void* FifoManager::PopFifoAuxBuffer(size_t size)
{
void* ret = s_fifo_aux_read_ptr;
s_fifo_aux_read_ptr += size;
void* ret = m_fifo_aux_read_ptr;
m_fifo_aux_read_ptr += size;
return ret;
}
// Description: RunGpuLoop() sends data through this function.
static void ReadDataFromFifo(u32 readPtr)
void FifoManager::ReadDataFromFifo(u32 readPtr)
{
if (GPFifo::GATHER_PIPE_SIZE >
static_cast<size_t>(s_video_buffer + FIFO_SIZE - s_video_buffer_write_ptr))
static_cast<size_t>(m_video_buffer + FIFO_SIZE - m_video_buffer_write_ptr))
{
const size_t existing_len = s_video_buffer_write_ptr - s_video_buffer_read_ptr;
const size_t existing_len = m_video_buffer_write_ptr - m_video_buffer_read_ptr;
if (GPFifo::GATHER_PIPE_SIZE > static_cast<size_t>(FIFO_SIZE - existing_len))
{
PanicAlertFmt("FIFO out of bounds (existing {} + new {} > {})", existing_len,
GPFifo::GATHER_PIPE_SIZE, FIFO_SIZE);
return;
}
memmove(s_video_buffer, s_video_buffer_read_ptr, existing_len);
s_video_buffer_write_ptr = s_video_buffer + existing_len;
s_video_buffer_read_ptr = s_video_buffer;
memmove(m_video_buffer, m_video_buffer_read_ptr, existing_len);
m_video_buffer_write_ptr = m_video_buffer + existing_len;
m_video_buffer_read_ptr = m_video_buffer;
}
// Copy new video instructions to s_video_buffer for future use in rendering the new picture
// Copy new video instructions to m_video_buffer for future use in rendering the new picture
auto& system = Core::System::GetInstance();
auto& memory = system.GetMemory();
memory.CopyFromEmu(s_video_buffer_write_ptr, readPtr, GPFifo::GATHER_PIPE_SIZE);
s_video_buffer_write_ptr += GPFifo::GATHER_PIPE_SIZE;
memory.CopyFromEmu(m_video_buffer_write_ptr, readPtr, GPFifo::GATHER_PIPE_SIZE);
m_video_buffer_write_ptr += GPFifo::GATHER_PIPE_SIZE;
}
// The deterministic_gpu_thread version.
static void ReadDataFromFifoOnCPU(u32 readPtr)
void FifoManager::ReadDataFromFifoOnCPU(u32 readPtr)
{
u8* write_ptr = s_video_buffer_write_ptr;
if (GPFifo::GATHER_PIPE_SIZE > static_cast<size_t>(s_video_buffer + FIFO_SIZE - write_ptr))
u8* write_ptr = m_video_buffer_write_ptr;
if (GPFifo::GATHER_PIPE_SIZE > static_cast<size_t>(m_video_buffer + FIFO_SIZE - write_ptr))
{
// We can't wrap around while the GPU is working on the data.
// This should be very rare due to the reset in SyncGPU.
SyncGPU(SyncGPUReason::Wraparound);
if (!s_gpu_mainloop.IsRunning())
if (!m_gpu_mainloop.IsRunning())
{
// GPU is shutting down, so the next asserts may fail
return;
}
if (s_video_buffer_pp_read_ptr != s_video_buffer_read_ptr)
if (m_video_buffer_pp_read_ptr != m_video_buffer_read_ptr)
{
PanicAlertFmt("Desynced read pointers");
return;
}
write_ptr = s_video_buffer_write_ptr;
const size_t existing_len = write_ptr - s_video_buffer_pp_read_ptr;
write_ptr = m_video_buffer_write_ptr;
const size_t existing_len = write_ptr - m_video_buffer_pp_read_ptr;
if (GPFifo::GATHER_PIPE_SIZE > static_cast<size_t>(FIFO_SIZE - existing_len))
{
PanicAlertFmt("FIFO out of bounds (existing {} + new {} > {})", existing_len,
@ -307,50 +266,50 @@ static void ReadDataFromFifoOnCPU(u32 readPtr)
}
auto& system = Core::System::GetInstance();
auto& memory = system.GetMemory();
memory.CopyFromEmu(s_video_buffer_write_ptr, readPtr, GPFifo::GATHER_PIPE_SIZE);
s_video_buffer_pp_read_ptr = OpcodeDecoder::RunFifo<true>(
DataReader(s_video_buffer_pp_read_ptr, write_ptr + GPFifo::GATHER_PIPE_SIZE), nullptr);
memory.CopyFromEmu(m_video_buffer_write_ptr, readPtr, GPFifo::GATHER_PIPE_SIZE);
m_video_buffer_pp_read_ptr = OpcodeDecoder::RunFifo<true>(
DataReader(m_video_buffer_pp_read_ptr, write_ptr + GPFifo::GATHER_PIPE_SIZE), nullptr);
// This would have to be locked if the GPU thread didn't spin.
s_video_buffer_write_ptr = write_ptr + GPFifo::GATHER_PIPE_SIZE;
m_video_buffer_write_ptr = write_ptr + GPFifo::GATHER_PIPE_SIZE;
}
void ResetVideoBuffer()
void FifoManager::ResetVideoBuffer()
{
s_video_buffer_read_ptr = s_video_buffer;
s_video_buffer_write_ptr = s_video_buffer;
s_video_buffer_seen_ptr = s_video_buffer;
s_video_buffer_pp_read_ptr = s_video_buffer;
s_fifo_aux_write_ptr = s_fifo_aux_data;
s_fifo_aux_read_ptr = s_fifo_aux_data;
m_video_buffer_read_ptr = m_video_buffer;
m_video_buffer_write_ptr = m_video_buffer;
m_video_buffer_seen_ptr = m_video_buffer;
m_video_buffer_pp_read_ptr = m_video_buffer;
m_fifo_aux_write_ptr = m_fifo_aux_data;
m_fifo_aux_read_ptr = m_fifo_aux_data;
}
// Description: Main FIFO update loop
// Purpose: Keep the Core HW updated about the CPU-GPU distance
void RunGpuLoop()
void FifoManager::RunGpuLoop()
{
AsyncRequests::GetInstance()->SetEnable(true);
AsyncRequests::GetInstance()->SetPassthrough(false);
s_gpu_mainloop.Run(
[] {
m_gpu_mainloop.Run(
[this] {
// Run events from the CPU thread.
AsyncRequests::GetInstance()->PullEvents();
// Do nothing while paused
if (!s_emu_running_state.IsSet())
if (!m_emu_running_state.IsSet())
return;
if (s_use_deterministic_gpu_thread)
if (m_use_deterministic_gpu_thread)
{
// All the fifo/CP stuff is on the CPU. We just need to run the opcode decoder.
u8* seen_ptr = s_video_buffer_seen_ptr;
u8* write_ptr = s_video_buffer_write_ptr;
u8* seen_ptr = m_video_buffer_seen_ptr;
u8* write_ptr = m_video_buffer_write_ptr;
// See comment in SyncGPU
if (write_ptr > seen_ptr)
{
s_video_buffer_read_ptr =
OpcodeDecoder::RunFifo(DataReader(s_video_buffer_read_ptr, write_ptr), nullptr);
s_video_buffer_seen_ptr = write_ptr;
m_video_buffer_read_ptr =
OpcodeDecoder::RunFifo(DataReader(m_video_buffer_read_ptr, write_ptr), nullptr);
m_video_buffer_seen_ptr = write_ptr;
}
}
else
@ -365,7 +324,7 @@ void RunGpuLoop()
fifo.bFF_GPReadEnable.load(std::memory_order_relaxed) &&
fifo.CPReadWriteDistance.load(std::memory_order_relaxed) && !AtBreakpoint())
{
if (s_config_sync_gpu && s_sync_ticks.load() < s_config_sync_gpu_min_distance)
if (m_config_sync_gpu && m_sync_ticks.load() < m_config_sync_gpu_min_distance)
break;
u32 cyclesExecuted = 0;
@ -385,13 +344,13 @@ void RunGpuLoop()
"instability in the game. Please report it.",
distance);
u8* write_ptr = s_video_buffer_write_ptr;
s_video_buffer_read_ptr = OpcodeDecoder::RunFifo(
DataReader(s_video_buffer_read_ptr, write_ptr), &cyclesExecuted);
u8* write_ptr = m_video_buffer_write_ptr;
m_video_buffer_read_ptr = OpcodeDecoder::RunFifo(
DataReader(m_video_buffer_read_ptr, write_ptr), &cyclesExecuted);
fifo.CPReadPointer.store(readPtr, std::memory_order_relaxed);
fifo.CPReadWriteDistance.fetch_sub(GPFifo::GATHER_PIPE_SIZE, std::memory_order_seq_cst);
if ((write_ptr - s_video_buffer_read_ptr) == 0)
if ((write_ptr - m_video_buffer_read_ptr) == 0)
{
fifo.SafeCPReadPointer.store(fifo.CPReadPointer.load(std::memory_order_relaxed),
std::memory_order_relaxed);
@ -399,13 +358,15 @@ void RunGpuLoop()
command_processor.SetCPStatusFromGPU(system);
if (s_config_sync_gpu)
if (m_config_sync_gpu)
{
cyclesExecuted = (int)(cyclesExecuted / s_config_sync_gpu_overclock);
int old = s_sync_ticks.fetch_sub(cyclesExecuted);
if (old >= s_config_sync_gpu_max_distance &&
old - (int)cyclesExecuted < s_config_sync_gpu_max_distance)
s_sync_wakeup_event.Set();
cyclesExecuted = (int)(cyclesExecuted / m_config_sync_gpu_overclock);
int old = m_sync_ticks.fetch_sub(cyclesExecuted);
if (old >= m_config_sync_gpu_max_distance &&
old - (int)cyclesExecuted < m_config_sync_gpu_max_distance)
{
m_sync_wakeup_event.Set();
}
}
// This call is pretty important in DualCore mode and must be called in the FIFO Loop.
@ -416,11 +377,11 @@ void RunGpuLoop()
}
// fast skip remaining GPU time if fifo is empty
if (s_sync_ticks.load() > 0)
if (m_sync_ticks.load() > 0)
{
int old = s_sync_ticks.exchange(0);
if (old >= s_config_sync_gpu_max_distance)
s_sync_wakeup_event.Set();
int old = m_sync_ticks.exchange(0);
if (old >= m_config_sync_gpu_max_distance)
m_sync_wakeup_event.Set();
}
// The fifo is empty and it's unlikely we will get any more work in the near future.
@ -435,20 +396,20 @@ void RunGpuLoop()
AsyncRequests::GetInstance()->SetPassthrough(true);
}
void FlushGpu()
void FifoManager::FlushGpu()
{
if (!Core::System::GetInstance().IsDualCoreMode() || s_use_deterministic_gpu_thread)
if (!Core::System::GetInstance().IsDualCoreMode() || m_use_deterministic_gpu_thread)
return;
s_gpu_mainloop.Wait();
m_gpu_mainloop.Wait();
}
void GpuMaySleep()
void FifoManager::GpuMaySleep()
{
s_gpu_mainloop.AllowSleep();
m_gpu_mainloop.AllowSleep();
}
bool AtBreakpoint()
bool FifoManager::AtBreakpoint() const
{
auto& system = Core::System::GetInstance();
auto& command_processor = system.GetCommandProcessor();
@ -458,44 +419,44 @@ bool AtBreakpoint()
fifo.CPBreakpoint.load(std::memory_order_relaxed));
}
void RunGpu()
void FifoManager::RunGpu()
{
auto& system = Core::System::GetInstance();
const bool is_dual_core = system.IsDualCoreMode();
// wake up GPU thread
if (is_dual_core && !s_use_deterministic_gpu_thread)
if (is_dual_core && !m_use_deterministic_gpu_thread)
{
s_gpu_mainloop.Wakeup();
m_gpu_mainloop.Wakeup();
}
// if the sync GPU callback is suspended, wake it up.
if (!is_dual_core || s_use_deterministic_gpu_thread || s_config_sync_gpu)
if (!is_dual_core || m_use_deterministic_gpu_thread || m_config_sync_gpu)
{
if (s_syncing_suspended)
if (m_syncing_suspended)
{
s_syncing_suspended = false;
system.GetCoreTiming().ScheduleEvent(GPU_TIME_SLOT_SIZE, s_event_sync_gpu,
m_syncing_suspended = false;
system.GetCoreTiming().ScheduleEvent(GPU_TIME_SLOT_SIZE, m_event_sync_gpu,
GPU_TIME_SLOT_SIZE);
}
}
}
static int RunGpuOnCpu(int ticks)
int FifoManager::RunGpuOnCpu(int ticks)
{
auto& system = Core::System::GetInstance();
auto& command_processor = system.GetCommandProcessor();
auto& fifo = command_processor.GetFifo();
bool reset_simd_state = false;
int available_ticks = int(ticks * s_config_sync_gpu_overclock) + s_sync_ticks.load();
int available_ticks = int(ticks * m_config_sync_gpu_overclock) + m_sync_ticks.load();
while (fifo.bFF_GPReadEnable.load(std::memory_order_relaxed) &&
fifo.CPReadWriteDistance.load(std::memory_order_relaxed) && !AtBreakpoint() &&
available_ticks >= 0)
{
if (s_use_deterministic_gpu_thread)
if (m_use_deterministic_gpu_thread)
{
ReadDataFromFifoOnCPU(fifo.CPReadPointer.load(std::memory_order_relaxed));
s_gpu_mainloop.Wakeup();
m_gpu_mainloop.Wakeup();
}
else
{
@ -507,8 +468,8 @@ static int RunGpuOnCpu(int ticks)
}
ReadDataFromFifo(fifo.CPReadPointer.load(std::memory_order_relaxed));
u32 cycles = 0;
s_video_buffer_read_ptr = OpcodeDecoder::RunFifo(
DataReader(s_video_buffer_read_ptr, s_video_buffer_write_ptr), &cycles);
m_video_buffer_read_ptr = OpcodeDecoder::RunFifo(
DataReader(m_video_buffer_read_ptr, m_video_buffer_write_ptr), &cycles);
available_ticks -= cycles;
}
@ -534,7 +495,7 @@ static int RunGpuOnCpu(int ticks)
}
// Discard all available ticks as there is nothing to do any more.
s_sync_ticks.store(std::min(available_ticks, 0));
m_sync_ticks.store(std::min(available_ticks, 0));
// If the GPU is idle, drop the handler.
if (available_ticks >= 0)
@ -544,7 +505,7 @@ static int RunGpuOnCpu(int ticks)
return -available_ticks + GPU_TIME_SLOT_SIZE;
}
void UpdateWantDeterminism(bool want)
void FifoManager::UpdateWantDeterminism(bool want)
{
// We are paused (or not running at all yet), so
// it should be safe to change this.
@ -564,87 +525,83 @@ void UpdateWantDeterminism(bool want)
gpu_thread = gpu_thread && Core::System::GetInstance().IsDualCoreMode();
if (s_use_deterministic_gpu_thread != gpu_thread)
if (m_use_deterministic_gpu_thread != gpu_thread)
{
s_use_deterministic_gpu_thread = gpu_thread;
m_use_deterministic_gpu_thread = gpu_thread;
if (gpu_thread)
{
// These haven't been updated in non-deterministic mode.
s_video_buffer_seen_ptr = s_video_buffer_pp_read_ptr = s_video_buffer_read_ptr;
m_video_buffer_seen_ptr = m_video_buffer_pp_read_ptr = m_video_buffer_read_ptr;
CopyPreprocessCPStateFromMain();
VertexLoaderManager::MarkAllDirty();
}
}
}
bool UseDeterministicGPUThread()
{
return s_use_deterministic_gpu_thread;
}
/* This function checks the emulated CPU - GPU distance and may wake up the GPU,
* or block the CPU if required. It should be called by the CPU thread regularly.
* @ticks The gone emulated CPU time.
* @return A good time to call WaitForGpuThread() next.
*/
static int WaitForGpuThread(int ticks)
int FifoManager::WaitForGpuThread(int ticks)
{
int old = s_sync_ticks.fetch_add(ticks);
int old = m_sync_ticks.fetch_add(ticks);
int now = old + ticks;
// GPU is idle, so stop polling.
if (old >= 0 && s_gpu_mainloop.IsDone())
if (old >= 0 && m_gpu_mainloop.IsDone())
return -1;
// Wakeup GPU
if (old < s_config_sync_gpu_min_distance && now >= s_config_sync_gpu_min_distance)
if (old < m_config_sync_gpu_min_distance && now >= m_config_sync_gpu_min_distance)
RunGpu();
// If the GPU is still sleeping, wait for a longer time
if (now < s_config_sync_gpu_min_distance)
return GPU_TIME_SLOT_SIZE + s_config_sync_gpu_min_distance - now;
if (now < m_config_sync_gpu_min_distance)
return GPU_TIME_SLOT_SIZE + m_config_sync_gpu_min_distance - now;
// Wait for GPU
if (now >= s_config_sync_gpu_max_distance)
s_sync_wakeup_event.Wait();
if (now >= m_config_sync_gpu_max_distance)
m_sync_wakeup_event.Wait();
return GPU_TIME_SLOT_SIZE;
}
static void SyncGPUCallback(Core::System& system, u64 ticks, s64 cyclesLate)
void FifoManager::SyncGPUCallback(Core::System& system, u64 ticks, s64 cyclesLate)
{
ticks += cyclesLate;
int next = -1;
if (!system.IsDualCoreMode() || s_use_deterministic_gpu_thread)
auto& fifo = system.GetFifo();
if (!system.IsDualCoreMode() || fifo.m_use_deterministic_gpu_thread)
{
next = RunGpuOnCpu((int)ticks);
next = fifo.RunGpuOnCpu((int)ticks);
}
else if (s_config_sync_gpu)
else if (fifo.m_config_sync_gpu)
{
next = WaitForGpuThread((int)ticks);
next = fifo.WaitForGpuThread((int)ticks);
}
s_syncing_suspended = next < 0;
if (!s_syncing_suspended)
system.GetCoreTiming().ScheduleEvent(next, s_event_sync_gpu, next);
fifo.m_syncing_suspended = next < 0;
if (!fifo.m_syncing_suspended)
system.GetCoreTiming().ScheduleEvent(next, fifo.m_event_sync_gpu, next);
}
void SyncGPUForRegisterAccess()
void FifoManager::SyncGPUForRegisterAccess()
{
SyncGPU(SyncGPUReason::Other);
if (!Core::System::GetInstance().IsDualCoreMode() || s_use_deterministic_gpu_thread)
if (!Core::System::GetInstance().IsDualCoreMode() || m_use_deterministic_gpu_thread)
RunGpuOnCpu(GPU_TIME_SLOT_SIZE);
else if (s_config_sync_gpu)
else if (m_config_sync_gpu)
WaitForGpuThread(GPU_TIME_SLOT_SIZE);
}
// Initialize GPU - CPU thread syncing, this gives us a deterministic way to start the GPU thread.
void Prepare()
void FifoManager::Prepare()
{
s_event_sync_gpu =
m_event_sync_gpu =
Core::System::GetInstance().GetCoreTiming().RegisterEvent("SyncGPUCallback", SyncGPUCallback);
s_syncing_suspended = true;
m_syncing_suspended = true;
}
} // namespace Fifo