mirror of
https://github.com/yuzu-mirror/yuzu
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365 lines
12 KiB
C++
365 lines
12 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/fiber.h"
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#include "common/microprofile.h"
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#include "common/scope_exit.h"
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#include "common/thread.h"
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#include "core/core.h"
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#include "core/core_timing.h"
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#include "core/cpu_manager.h"
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#include "core/hle/kernel/k_scheduler.h"
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#include "core/hle/kernel/k_thread.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/physical_core.h"
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#include "video_core/gpu.h"
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namespace Core {
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CpuManager::CpuManager(System& system_) : system{system_} {}
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CpuManager::~CpuManager() = default;
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void CpuManager::ThreadStart(std::stop_token stop_token, CpuManager& cpu_manager,
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std::size_t core) {
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cpu_manager.RunThread(stop_token, core);
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}
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void CpuManager::Initialize() {
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running_mode = true;
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if (is_multicore) {
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for (std::size_t core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) {
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core_data[core].host_thread = std::jthread(ThreadStart, std::ref(*this), core);
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}
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} else {
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core_data[0].host_thread = std::jthread(ThreadStart, std::ref(*this), 0);
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}
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}
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void CpuManager::Shutdown() {
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running_mode = false;
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Pause(false);
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}
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std::function<void(void*)> CpuManager::GetGuestThreadStartFunc() {
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return GuestThreadFunction;
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}
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std::function<void(void*)> CpuManager::GetIdleThreadStartFunc() {
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return IdleThreadFunction;
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}
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std::function<void(void*)> CpuManager::GetSuspendThreadStartFunc() {
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return SuspendThreadFunction;
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}
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void CpuManager::GuestThreadFunction(void* cpu_manager_) {
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CpuManager* cpu_manager = static_cast<CpuManager*>(cpu_manager_);
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if (cpu_manager->is_multicore) {
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cpu_manager->MultiCoreRunGuestThread();
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} else {
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cpu_manager->SingleCoreRunGuestThread();
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}
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}
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void CpuManager::GuestRewindFunction(void* cpu_manager_) {
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CpuManager* cpu_manager = static_cast<CpuManager*>(cpu_manager_);
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if (cpu_manager->is_multicore) {
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cpu_manager->MultiCoreRunGuestLoop();
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} else {
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cpu_manager->SingleCoreRunGuestLoop();
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}
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}
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void CpuManager::IdleThreadFunction(void* cpu_manager_) {
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CpuManager* cpu_manager = static_cast<CpuManager*>(cpu_manager_);
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if (cpu_manager->is_multicore) {
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cpu_manager->MultiCoreRunIdleThread();
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} else {
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cpu_manager->SingleCoreRunIdleThread();
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}
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}
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void CpuManager::SuspendThreadFunction(void* cpu_manager_) {
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CpuManager* cpu_manager = static_cast<CpuManager*>(cpu_manager_);
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if (cpu_manager->is_multicore) {
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cpu_manager->MultiCoreRunSuspendThread();
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} else {
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cpu_manager->SingleCoreRunSuspendThread();
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}
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}
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void* CpuManager::GetStartFuncParamater() {
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return static_cast<void*>(this);
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}
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///////////////////////////////////////////////////////////////////////////////
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/// MultiCore ///
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///////////////////////////////////////////////////////////////////////////////
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void CpuManager::MultiCoreRunGuestThread() {
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auto& kernel = system.Kernel();
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kernel.CurrentScheduler()->OnThreadStart();
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auto* thread = kernel.CurrentScheduler()->GetCurrentThread();
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auto& host_context = thread->GetHostContext();
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host_context->SetRewindPoint(GuestRewindFunction, this);
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MultiCoreRunGuestLoop();
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}
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void CpuManager::MultiCoreRunGuestLoop() {
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auto& kernel = system.Kernel();
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while (true) {
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auto* physical_core = &kernel.CurrentPhysicalCore();
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system.EnterDynarmicProfile();
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while (!physical_core->IsInterrupted()) {
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physical_core->Run();
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physical_core = &kernel.CurrentPhysicalCore();
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}
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system.ExitDynarmicProfile();
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{
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Kernel::KScopedDisableDispatch dd(kernel);
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physical_core->ArmInterface().ClearExclusiveState();
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}
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}
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}
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void CpuManager::MultiCoreRunIdleThread() {
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auto& kernel = system.Kernel();
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while (true) {
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Kernel::KScopedDisableDispatch dd(kernel);
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kernel.CurrentPhysicalCore().Idle();
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}
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}
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void CpuManager::MultiCoreRunSuspendThread() {
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auto& kernel = system.Kernel();
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kernel.CurrentScheduler()->OnThreadStart();
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while (true) {
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auto core = kernel.CurrentPhysicalCoreIndex();
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auto& scheduler = *kernel.CurrentScheduler();
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Kernel::KThread* current_thread = scheduler.GetCurrentThread();
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Common::Fiber::YieldTo(current_thread->GetHostContext(), *core_data[core].host_context);
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ASSERT(scheduler.ContextSwitchPending());
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ASSERT(core == kernel.CurrentPhysicalCoreIndex());
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scheduler.RescheduleCurrentCore();
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}
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}
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void CpuManager::MultiCorePause(bool paused) {
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if (!paused) {
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bool all_not_barrier = false;
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while (!all_not_barrier) {
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all_not_barrier = true;
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for (const auto& data : core_data) {
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all_not_barrier &= !data.is_running.load() && data.initialized.load();
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}
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}
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for (auto& data : core_data) {
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data.enter_barrier->Set();
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}
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if (paused_state.load()) {
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bool all_barrier = false;
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while (!all_barrier) {
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all_barrier = true;
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for (const auto& data : core_data) {
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all_barrier &= data.is_paused.load() && data.initialized.load();
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}
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}
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for (auto& data : core_data) {
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data.exit_barrier->Set();
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}
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}
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} else {
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/// Wait until all cores are paused.
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bool all_barrier = false;
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while (!all_barrier) {
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all_barrier = true;
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for (const auto& data : core_data) {
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all_barrier &= data.is_paused.load() && data.initialized.load();
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}
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}
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/// Don't release the barrier
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}
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paused_state = paused;
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}
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///////////////////////////////////////////////////////////////////////////////
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/// SingleCore ///
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///////////////////////////////////////////////////////////////////////////////
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void CpuManager::SingleCoreRunGuestThread() {
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auto& kernel = system.Kernel();
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kernel.CurrentScheduler()->OnThreadStart();
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auto* thread = kernel.CurrentScheduler()->GetCurrentThread();
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auto& host_context = thread->GetHostContext();
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host_context->SetRewindPoint(GuestRewindFunction, this);
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SingleCoreRunGuestLoop();
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}
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void CpuManager::SingleCoreRunGuestLoop() {
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auto& kernel = system.Kernel();
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while (true) {
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auto* physical_core = &kernel.CurrentPhysicalCore();
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system.EnterDynarmicProfile();
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if (!physical_core->IsInterrupted()) {
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physical_core->Run();
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physical_core = &kernel.CurrentPhysicalCore();
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}
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system.ExitDynarmicProfile();
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kernel.SetIsPhantomModeForSingleCore(true);
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system.CoreTiming().Advance();
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kernel.SetIsPhantomModeForSingleCore(false);
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physical_core->ArmInterface().ClearExclusiveState();
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PreemptSingleCore();
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auto& scheduler = kernel.Scheduler(current_core);
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scheduler.RescheduleCurrentCore();
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}
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}
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void CpuManager::SingleCoreRunIdleThread() {
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auto& kernel = system.Kernel();
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while (true) {
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auto& physical_core = kernel.CurrentPhysicalCore();
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PreemptSingleCore(false);
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system.CoreTiming().AddTicks(1000U);
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idle_count++;
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auto& scheduler = physical_core.Scheduler();
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scheduler.RescheduleCurrentCore();
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}
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}
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void CpuManager::SingleCoreRunSuspendThread() {
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auto& kernel = system.Kernel();
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kernel.CurrentScheduler()->OnThreadStart();
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while (true) {
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auto core = kernel.GetCurrentHostThreadID();
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auto& scheduler = *kernel.CurrentScheduler();
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Kernel::KThread* current_thread = scheduler.GetCurrentThread();
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Common::Fiber::YieldTo(current_thread->GetHostContext(), *core_data[0].host_context);
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ASSERT(scheduler.ContextSwitchPending());
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ASSERT(core == kernel.GetCurrentHostThreadID());
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scheduler.RescheduleCurrentCore();
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}
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}
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void CpuManager::PreemptSingleCore(bool from_running_enviroment) {
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{
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auto& kernel = system.Kernel();
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auto& scheduler = kernel.Scheduler(current_core);
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Kernel::KThread* current_thread = scheduler.GetCurrentThread();
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if (idle_count >= 4 || from_running_enviroment) {
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if (!from_running_enviroment) {
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system.CoreTiming().Idle();
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idle_count = 0;
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}
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kernel.SetIsPhantomModeForSingleCore(true);
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system.CoreTiming().Advance();
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kernel.SetIsPhantomModeForSingleCore(false);
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}
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current_core.store((current_core + 1) % Core::Hardware::NUM_CPU_CORES);
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system.CoreTiming().ResetTicks();
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scheduler.Unload(scheduler.GetCurrentThread());
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auto& next_scheduler = kernel.Scheduler(current_core);
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Common::Fiber::YieldTo(current_thread->GetHostContext(), *next_scheduler.ControlContext());
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}
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// May have changed scheduler
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{
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auto& scheduler = system.Kernel().Scheduler(current_core);
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scheduler.Reload(scheduler.GetCurrentThread());
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if (!scheduler.IsIdle()) {
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idle_count = 0;
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}
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}
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}
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void CpuManager::SingleCorePause(bool paused) {
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if (!paused) {
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bool all_not_barrier = false;
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while (!all_not_barrier) {
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all_not_barrier = !core_data[0].is_running.load() && core_data[0].initialized.load();
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}
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core_data[0].enter_barrier->Set();
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if (paused_state.load()) {
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bool all_barrier = false;
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while (!all_barrier) {
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all_barrier = core_data[0].is_paused.load() && core_data[0].initialized.load();
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}
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core_data[0].exit_barrier->Set();
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}
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} else {
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/// Wait until all cores are paused.
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bool all_barrier = false;
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while (!all_barrier) {
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all_barrier = core_data[0].is_paused.load() && core_data[0].initialized.load();
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}
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/// Don't release the barrier
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}
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paused_state = paused;
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}
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void CpuManager::Pause(bool paused) {
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if (is_multicore) {
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MultiCorePause(paused);
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} else {
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SingleCorePause(paused);
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}
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}
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void CpuManager::RunThread(std::stop_token stop_token, std::size_t core) {
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/// Initialization
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system.RegisterCoreThread(core);
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std::string name;
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if (is_multicore) {
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name = "yuzu:CPUCore_" + std::to_string(core);
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} else {
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name = "yuzu:CPUThread";
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}
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MicroProfileOnThreadCreate(name.c_str());
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Common::SetCurrentThreadName(name.c_str());
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Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
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auto& data = core_data[core];
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data.enter_barrier = std::make_unique<Common::Event>();
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data.exit_barrier = std::make_unique<Common::Event>();
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data.host_context = Common::Fiber::ThreadToFiber();
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data.is_running = false;
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data.initialized = true;
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const bool sc_sync = !is_async_gpu && !is_multicore;
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bool sc_sync_first_use = sc_sync;
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// Cleanup
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SCOPE_EXIT({
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data.host_context->Exit();
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data.enter_barrier.reset();
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data.exit_barrier.reset();
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data.initialized = false;
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MicroProfileOnThreadExit();
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});
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/// Running
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while (running_mode) {
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data.is_running = false;
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data.enter_barrier->Wait();
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if (sc_sync_first_use) {
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system.GPU().ObtainContext();
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sc_sync_first_use = false;
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}
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// Emulation was stopped
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if (stop_token.stop_requested()) {
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return;
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}
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auto current_thread = system.Kernel().CurrentScheduler()->GetCurrentThread();
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data.is_running = true;
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Common::Fiber::YieldTo(data.host_context, *current_thread->GetHostContext());
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data.is_running = false;
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data.is_paused = true;
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data.exit_barrier->Wait();
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data.is_paused = false;
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}
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}
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} // namespace Core
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