eden-emu
/
eden
mirror of https://git.eden-emu.dev/eden-emu/eden.git
1
0
Fork 0
Code Releases Wiki Activity
Browse Source

CpuManager: simplify pausing

nce_cpp
Liam 4 years ago
parent
3941e5db4d
commit
5772327b39
3 changed files with 36 additions and 95 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 116
      src/core/cpu_manager.cpp
  2. 11
      src/core/cpu_manager.h
  3. 4
      src/core/hle/kernel/kernel.cpp

116
src/core/cpu_manager.cpp
View File

@ -16,7 +16,8 @@
namespace Core {
CpuManager::CpuManager(System& system_) : system{system_} {}
CpuManager::CpuManager(System& system_)
: pause_barrier{std::make_unique<Common::Barrier>(1)}, system{system_} {}
CpuManager::~CpuManager() = default;
void CpuManager::ThreadStart(std::stop_token stop_token, CpuManager& cpu_manager,
@ -30,8 +31,10 @@ void CpuManager::Initialize() {
for (std::size_t core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
core_data[core].host_thread = std::jthread(ThreadStart, std::ref(*this), core);
}
pause_barrier = std::make_unique<Common::Barrier>(Core::Hardware::NUM_CPU_CORES + 1);
} else {
core_data[0].host_thread = std::jthread(ThreadStart, std::ref(*this), 0);
pause_barrier = std::make_unique<Common::Barrier>(2);
}
}
@ -138,51 +141,14 @@ void CpuManager::MultiCoreRunSuspendThread() {
auto core = kernel.CurrentPhysicalCoreIndex();
auto& scheduler = *kernel.CurrentScheduler();
Kernel::KThread* current_thread = scheduler.GetCurrentThread();
current_thread->DisableDispatch();
Common::Fiber::YieldTo(current_thread->GetHostContext(), *core_data[core].host_context);
ASSERT(scheduler.ContextSwitchPending());
ASSERT(core == kernel.CurrentPhysicalCoreIndex());
scheduler.RescheduleCurrentCore();
}
}
void CpuManager::MultiCorePause(bool paused) {
if (!paused) {
bool all_not_barrier = false;
while (!all_not_barrier) {
all_not_barrier = true;
for (const auto& data : core_data) {
all_not_barrier &= !data.is_running.load() && data.initialized.load();
}
}
for (auto& data : core_data) {
data.enter_barrier->Set();
}
if (paused_state.load()) {
bool all_barrier = false;
while (!all_barrier) {
all_barrier = true;
for (const auto& data : core_data) {
all_barrier &= data.is_paused.load() && data.initialized.load();
}
}
for (auto& data : core_data) {
data.exit_barrier->Set();
}
}
} else {
/// Wait until all cores are paused.
bool all_barrier = false;
while (!all_barrier) {
all_barrier = true;
for (const auto& data : core_data) {
all_barrier &= data.is_paused.load() && data.initialized.load();
}
}
/// Don't release the barrier
}
paused_state = paused;
}
///////////////////////////////////////////////////////////////////////////////
/// SingleCore ///
///////////////////////////////////////////////////////////////////////////////
@ -235,8 +201,9 @@ void CpuManager::SingleCoreRunSuspendThread() {
auto core = kernel.GetCurrentHostThreadID();
auto& scheduler = *kernel.CurrentScheduler();
Kernel::KThread* current_thread = scheduler.GetCurrentThread();
current_thread->DisableDispatch();
Common::Fiber::YieldTo(current_thread->GetHostContext(), *core_data[0].host_context);
ASSERT(scheduler.ContextSwitchPending());
ASSERT(core == kernel.GetCurrentHostThreadID());
scheduler.RescheduleCurrentCore();
}
@ -274,37 +241,21 @@ void CpuManager::PreemptSingleCore(bool from_running_enviroment) {
}
}
void CpuManager::SingleCorePause(bool paused) {
if (!paused) {
bool all_not_barrier = false;
while (!all_not_barrier) {
all_not_barrier = !core_data[0].is_running.load() && core_data[0].initialized.load();
}
core_data[0].enter_barrier->Set();
if (paused_state.load()) {
bool all_barrier = false;
while (!all_barrier) {
all_barrier = core_data[0].is_paused.load() && core_data[0].initialized.load();
}
core_data[0].exit_barrier->Set();
}
} else {
/// Wait until all cores are paused.
bool all_barrier = false;
while (!all_barrier) {
all_barrier = core_data[0].is_paused.load() && core_data[0].initialized.load();
}
/// Don't release the barrier
}
paused_state = paused;
}
void CpuManager::Pause(bool paused) {
if (is_multicore) {
MultiCorePause(paused);
} else {
SingleCorePause(paused);
std::scoped_lock lk{pause_lock};
if (pause_state == paused) {
return;
}
// Set the new state
pause_state.store(paused);
// Wake up any waiting threads
pause_state.notify_all();
// Wait for all threads to successfully change state before returning
pause_barrier->Sync();
}
void CpuManager::RunThread(std::stop_token stop_token, std::size_t core) {
@ -320,27 +271,29 @@ void CpuManager::RunThread(std::stop_token stop_token, std::size_t core) {
Common::SetCurrentThreadName(name.c_str());
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
auto& data = core_data[core];
data.enter_barrier = std::make_unique<Common::Event>();
data.exit_barrier = std::make_unique<Common::Event>();
data.host_context = Common::Fiber::ThreadToFiber();
data.is_running = false;
data.initialized = true;
const bool sc_sync = !is_async_gpu && !is_multicore;
bool sc_sync_first_use = sc_sync;
// Cleanup
SCOPE_EXIT({
data.host_context->Exit();
data.enter_barrier.reset();
data.exit_barrier.reset();
data.initialized = false;
MicroProfileOnThreadExit();
});
/// Running
while (running_mode) {
data.is_running = false;
data.enter_barrier->Wait();
if (pause_state.load(std::memory_order_relaxed)) {
// Wait for caller to acknowledge pausing
pause_barrier->Sync();
// Wait until unpaused
pause_state.wait(true, std::memory_order_relaxed);
// Wait for caller to acknowledge unpausing
pause_barrier->Sync();
}
if (sc_sync_first_use) {
system.GPU().ObtainContext();
sc_sync_first_use = false;
@ -352,12 +305,7 @@ void CpuManager::RunThread(std::stop_token stop_token, std::size_t core) {
}
auto current_thread = system.Kernel().CurrentScheduler()->GetCurrentThread();
data.is_running = true;
Common::Fiber::YieldTo(data.host_context, *current_thread->GetHostContext());
data.is_running = false;
data.is_paused = true;
data.exit_barrier->Wait();
data.is_paused = false;
}
}

11
src/core/cpu_manager.h
View File

@ -69,13 +69,11 @@ private:
void MultiCoreRunGuestLoop();
void MultiCoreRunIdleThread();
void MultiCoreRunSuspendThread();
void MultiCorePause(bool paused);
void SingleCoreRunGuestThread();
void SingleCoreRunGuestLoop();
void SingleCoreRunIdleThread();
void SingleCoreRunSuspendThread();
void SingleCorePause(bool paused);
static void ThreadStart(std::stop_token stop_token, CpuManager& cpu_manager, std::size_t core);
@ -83,16 +81,13 @@ private:
struct CoreData {
std::shared_ptr<Common::Fiber> host_context;
std::unique_ptr<Common::Event> enter_barrier;
std::unique_ptr<Common::Event> exit_barrier;
std::atomic<bool> is_running;
std::atomic<bool> is_paused;
std::atomic<bool> initialized;
std::jthread host_thread;
};
std::atomic<bool> running_mode{};
std::atomic<bool> paused_state{};
std::atomic<bool> pause_state{};
std::unique_ptr<Common::Barrier> pause_barrier{};
std::mutex pause_lock{};
std::array<CoreData, Core::Hardware::NUM_CPU_CORES> core_data{};

4
src/core/hle/kernel/kernel.cpp
View File

@ -252,6 +252,7 @@ struct KernelCore::Impl {
core_id)
.IsSuccess());
suspend_threads[core_id]->SetName(fmt::format("SuspendThread:{}", core_id));
suspend_threads[core_id]->DisableDispatch();
}
}
@ -1073,9 +1074,6 @@ void KernelCore::Suspend(bool in_suspention) {
impl->suspend_threads[core_id]->SetState(state);
impl->suspend_threads[core_id]->SetWaitReasonForDebugging(
ThreadWaitReasonForDebugging::Suspended);
if (!should_suspend) {
impl->suspend_threads[core_id]->DisableDispatch();
}
}
}
}

Write Preview
Loading…
Cancel
Save