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Diffstat (limited to 'src/core/hle/kernel/scheduler.cpp')
| -rw-r--r-- | src/core/hle/kernel/scheduler.cpp | 819 |
1 files changed, 0 insertions, 819 deletions
diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp deleted file mode 100644 index 9a969fdb5..000000000 --- a/src/core/hle/kernel/scheduler.cpp +++ /dev/null @@ -1,819 +0,0 @@ -// Copyright 2018 yuzu emulator team -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. -// -// SelectThreads, Yield functions originally by TuxSH. -// licensed under GPLv2 or later under exception provided by the author. - -#include <algorithm> -#include <mutex> -#include <set> -#include <unordered_set> -#include <utility> - -#include "common/assert.h" -#include "common/bit_util.h" -#include "common/fiber.h" -#include "common/logging/log.h" -#include "core/arm/arm_interface.h" -#include "core/core.h" -#include "core/core_timing.h" -#include "core/cpu_manager.h" -#include "core/hle/kernel/kernel.h" -#include "core/hle/kernel/physical_core.h" -#include "core/hle/kernel/process.h" -#include "core/hle/kernel/scheduler.h" -#include "core/hle/kernel/time_manager.h" - -namespace Kernel { - -GlobalScheduler::GlobalScheduler(KernelCore& kernel) : kernel{kernel} {} - -GlobalScheduler::~GlobalScheduler() = default; - -void GlobalScheduler::AddThread(std::shared_ptr<Thread> thread) { - std::scoped_lock lock{global_list_guard}; - thread_list.push_back(std::move(thread)); -} - -void GlobalScheduler::RemoveThread(std::shared_ptr<Thread> thread) { - std::scoped_lock lock{global_list_guard}; - thread_list.erase(std::remove(thread_list.begin(), thread_list.end(), thread), - thread_list.end()); -} - -u32 GlobalScheduler::SelectThreads() { - ASSERT(is_locked); - const auto update_thread = [](Thread* thread, Scheduler& sched) { - std::scoped_lock lock{sched.guard}; - if (thread != sched.selected_thread_set.get()) { - if (thread == nullptr) { - ++sched.idle_selection_count; - } - sched.selected_thread_set = SharedFrom(thread); - } - const bool reschedule_pending = - sched.is_context_switch_pending || (sched.selected_thread_set != sched.current_thread); - sched.is_context_switch_pending = reschedule_pending; - std::atomic_thread_fence(std::memory_order_seq_cst); - return reschedule_pending; - }; - if (!is_reselection_pending.load()) { - return 0; - } - std::array<Thread*, Core::Hardware::NUM_CPU_CORES> top_threads{}; - - u32 idle_cores{}; - - // Step 1: Get top thread in schedule queue. - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - Thread* top_thread = - scheduled_queue[core].empty() ? nullptr : scheduled_queue[core].front(); - if (top_thread != nullptr) { - // TODO(Blinkhawk): Implement Thread Pinning - } else { - idle_cores |= (1U << core); - } - top_threads[core] = top_thread; - } - - while (idle_cores != 0) { - u32 core_id = Common::CountTrailingZeroes32(idle_cores); - - if (!suggested_queue[core_id].empty()) { - std::array<s32, Core::Hardware::NUM_CPU_CORES> migration_candidates{}; - std::size_t num_candidates = 0; - auto iter = suggested_queue[core_id].begin(); - Thread* suggested = nullptr; - // Step 2: Try selecting a suggested thread. - while (iter != suggested_queue[core_id].end()) { - suggested = *iter; - iter++; - s32 suggested_core_id = suggested->GetProcessorID(); - Thread* top_thread = - suggested_core_id >= 0 ? top_threads[suggested_core_id] : nullptr; - if (top_thread != suggested) { - if (top_thread != nullptr && - top_thread->GetPriority() < THREADPRIO_MAX_CORE_MIGRATION) { - suggested = nullptr; - break; - // There's a too high thread to do core migration, cancel - } - TransferToCore(suggested->GetPriority(), static_cast<s32>(core_id), suggested); - break; - } - suggested = nullptr; - migration_candidates[num_candidates++] = suggested_core_id; - } - // Step 3: Select a suggested thread from another core - if (suggested == nullptr) { - for (std::size_t i = 0; i < num_candidates; i++) { - s32 candidate_core = migration_candidates[i]; - suggested = top_threads[candidate_core]; - auto it = scheduled_queue[candidate_core].begin(); - it++; - Thread* next = it != scheduled_queue[candidate_core].end() ? *it : nullptr; - if (next != nullptr) { - TransferToCore(suggested->GetPriority(), static_cast<s32>(core_id), - suggested); - top_threads[candidate_core] = next; - break; - } else { - suggested = nullptr; - } - } - } - top_threads[core_id] = suggested; - } - - idle_cores &= ~(1U << core_id); - } - u32 cores_needing_context_switch{}; - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - Scheduler& sched = kernel.Scheduler(core); - ASSERT(top_threads[core] == nullptr || - static_cast<u32>(top_threads[core]->GetProcessorID()) == core); - if (update_thread(top_threads[core], sched)) { - cores_needing_context_switch |= (1U << core); - } - } - return cores_needing_context_switch; -} - -bool GlobalScheduler::YieldThread(Thread* yielding_thread) { - ASSERT(is_locked); - // Note: caller should use critical section, etc. - if (!yielding_thread->IsRunnable()) { - // Normally this case shouldn't happen except for SetThreadActivity. - is_reselection_pending.store(true, std::memory_order_release); - return false; - } - const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); - const u32 priority = yielding_thread->GetPriority(); - - // Yield the thread - Reschedule(priority, core_id, yielding_thread); - const Thread* const winner = scheduled_queue[core_id].front(); - if (kernel.GetCurrentHostThreadID() != core_id) { - is_reselection_pending.store(true, std::memory_order_release); - } - - return AskForReselectionOrMarkRedundant(yielding_thread, winner); -} - -bool GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) { - ASSERT(is_locked); - // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section, - // etc. - if (!yielding_thread->IsRunnable()) { - // Normally this case shouldn't happen except for SetThreadActivity. - is_reselection_pending.store(true, std::memory_order_release); - return false; - } - const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); - const u32 priority = yielding_thread->GetPriority(); - - // Yield the thread - Reschedule(priority, core_id, yielding_thread); - - std::array<Thread*, Core::Hardware::NUM_CPU_CORES> current_threads; - for (std::size_t i = 0; i < current_threads.size(); i++) { - current_threads[i] = scheduled_queue[i].empty() ? nullptr : scheduled_queue[i].front(); - } - - Thread* next_thread = scheduled_queue[core_id].front(priority); - Thread* winner = nullptr; - for (auto& thread : suggested_queue[core_id]) { - const s32 source_core = thread->GetProcessorID(); - if (source_core >= 0) { - if (current_threads[source_core] != nullptr) { - if (thread == current_threads[source_core] || - current_threads[source_core]->GetPriority() < min_regular_priority) { - continue; - } - } - } - if (next_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks() || - next_thread->GetPriority() < thread->GetPriority()) { - if (thread->GetPriority() <= priority) { - winner = thread; - break; - } - } - } - - if (winner != nullptr) { - if (winner != yielding_thread) { - TransferToCore(winner->GetPriority(), s32(core_id), winner); - } - } else { - winner = next_thread; - } - - if (kernel.GetCurrentHostThreadID() != core_id) { - is_reselection_pending.store(true, std::memory_order_release); - } - - return AskForReselectionOrMarkRedundant(yielding_thread, winner); -} - -bool GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread) { - ASSERT(is_locked); - // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section, - // etc. - if (!yielding_thread->IsRunnable()) { - // Normally this case shouldn't happen except for SetThreadActivity. - is_reselection_pending.store(true, std::memory_order_release); - return false; - } - Thread* winner = nullptr; - const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); - - // Remove the thread from its scheduled mlq, put it on the corresponding "suggested" one instead - TransferToCore(yielding_thread->GetPriority(), -1, yielding_thread); - - // If the core is idle, perform load balancing, excluding the threads that have just used this - // function... - if (scheduled_queue[core_id].empty()) { - // Here, "current_threads" is calculated after the ""yield"", unlike yield -1 - std::array<Thread*, Core::Hardware::NUM_CPU_CORES> current_threads; - for (std::size_t i = 0; i < current_threads.size(); i++) { - current_threads[i] = scheduled_queue[i].empty() ? nullptr : scheduled_queue[i].front(); - } - for (auto& thread : suggested_queue[core_id]) { - const s32 source_core = thread->GetProcessorID(); - if (source_core < 0 || thread == current_threads[source_core]) { - continue; - } - if (current_threads[source_core] == nullptr || - current_threads[source_core]->GetPriority() >= min_regular_priority) { - winner = thread; - } - break; - } - if (winner != nullptr) { - if (winner != yielding_thread) { - TransferToCore(winner->GetPriority(), static_cast<s32>(core_id), winner); - } - } else { - winner = yielding_thread; - } - } else { - winner = scheduled_queue[core_id].front(); - } - - if (kernel.GetCurrentHostThreadID() != core_id) { - is_reselection_pending.store(true, std::memory_order_release); - } - - return AskForReselectionOrMarkRedundant(yielding_thread, winner); -} - -void GlobalScheduler::PreemptThreads() { - ASSERT(is_locked); - for (std::size_t core_id = 0; core_id < Core::Hardware::NUM_CPU_CORES; core_id++) { - const u32 priority = preemption_priorities[core_id]; - - if (scheduled_queue[core_id].size(priority) > 0) { - if (scheduled_queue[core_id].size(priority) > 1) { - scheduled_queue[core_id].front(priority)->IncrementYieldCount(); - } - scheduled_queue[core_id].yield(priority); - if (scheduled_queue[core_id].size(priority) > 1) { - scheduled_queue[core_id].front(priority)->IncrementYieldCount(); - } - } - - Thread* current_thread = - scheduled_queue[core_id].empty() ? nullptr : scheduled_queue[core_id].front(); - Thread* winner = nullptr; - for (auto& thread : suggested_queue[core_id]) { - const s32 source_core = thread->GetProcessorID(); - if (thread->GetPriority() != priority) { - continue; - } - if (source_core >= 0) { - Thread* next_thread = scheduled_queue[source_core].empty() - ? nullptr - : scheduled_queue[source_core].front(); - if (next_thread != nullptr && next_thread->GetPriority() < 2) { - break; - } - if (next_thread == thread) { - continue; - } - } - if (current_thread != nullptr && - current_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks()) { - winner = thread; - break; - } - } - - if (winner != nullptr) { - TransferToCore(winner->GetPriority(), s32(core_id), winner); - current_thread = - winner->GetPriority() <= current_thread->GetPriority() ? winner : current_thread; - } - - if (current_thread != nullptr && current_thread->GetPriority() > priority) { - for (auto& thread : suggested_queue[core_id]) { - const s32 source_core = thread->GetProcessorID(); - if (thread->GetPriority() < priority) { - continue; - } - if (source_core >= 0) { - Thread* next_thread = scheduled_queue[source_core].empty() - ? nullptr - : scheduled_queue[source_core].front(); - if (next_thread != nullptr && next_thread->GetPriority() < 2) { - break; - } - if (next_thread == thread) { - continue; - } - } - if (current_thread != nullptr && - current_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks()) { - winner = thread; - break; - } - } - - if (winner != nullptr) { - TransferToCore(winner->GetPriority(), s32(core_id), winner); - current_thread = winner; - } - } - - is_reselection_pending.store(true, std::memory_order_release); - } -} - -void GlobalScheduler::EnableInterruptAndSchedule(u32 cores_pending_reschedule, - Core::EmuThreadHandle global_thread) { - u32 current_core = global_thread.host_handle; - bool must_context_switch = global_thread.guest_handle != InvalidHandle && - (current_core < Core::Hardware::NUM_CPU_CORES); - while (cores_pending_reschedule != 0) { - u32 core = Common::CountTrailingZeroes32(cores_pending_reschedule); - ASSERT(core < Core::Hardware::NUM_CPU_CORES); - if (!must_context_switch || core != current_core) { - auto& phys_core = kernel.PhysicalCore(core); - phys_core.Interrupt(); - } else { - must_context_switch = true; - } - cores_pending_reschedule &= ~(1U << core); - } - if (must_context_switch) { - auto& core_scheduler = kernel.CurrentScheduler(); - kernel.ExitSVCProfile(); - core_scheduler.TryDoContextSwitch(); - kernel.EnterSVCProfile(); - } -} - -void GlobalScheduler::Suggest(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - suggested_queue[core].add(thread, priority); -} - -void GlobalScheduler::Unsuggest(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - suggested_queue[core].remove(thread, priority); -} - -void GlobalScheduler::Schedule(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core."); - scheduled_queue[core].add(thread, priority); -} - -void GlobalScheduler::SchedulePrepend(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core."); - scheduled_queue[core].add(thread, priority, false); -} - -void GlobalScheduler::Reschedule(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - scheduled_queue[core].remove(thread, priority); - scheduled_queue[core].add(thread, priority); -} - -void GlobalScheduler::Unschedule(u32 priority, std::size_t core, Thread* thread) { - ASSERT(is_locked); - scheduled_queue[core].remove(thread, priority); -} - -void GlobalScheduler::TransferToCore(u32 priority, s32 destination_core, Thread* thread) { - ASSERT(is_locked); - const bool schedulable = thread->GetPriority() < THREADPRIO_COUNT; - const s32 source_core = thread->GetProcessorID(); - if (source_core == destination_core || !schedulable) { - return; - } - thread->SetProcessorID(destination_core); - if (source_core >= 0) { - Unschedule(priority, static_cast<u32>(source_core), thread); - } - if (destination_core >= 0) { - Unsuggest(priority, static_cast<u32>(destination_core), thread); - Schedule(priority, static_cast<u32>(destination_core), thread); - } - if (source_core >= 0) { - Suggest(priority, static_cast<u32>(source_core), thread); - } -} - -bool GlobalScheduler::AskForReselectionOrMarkRedundant(Thread* current_thread, - const Thread* winner) { - if (current_thread == winner) { - current_thread->IncrementYieldCount(); - return true; - } else { - is_reselection_pending.store(true, std::memory_order_release); - return false; - } -} - -void GlobalScheduler::AdjustSchedulingOnStatus(Thread* thread, u32 old_flags) { - if (old_flags == thread->scheduling_state) { - return; - } - ASSERT(is_locked); - - if (old_flags == static_cast<u32>(ThreadSchedStatus::Runnable)) { - // In this case the thread was running, now it's pausing/exitting - if (thread->processor_id >= 0) { - Unschedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread); - } - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (core != static_cast<u32>(thread->processor_id) && - thread->affinity_mask.GetAffinity(core)) { - Unsuggest(thread->current_priority, core, thread); - } - } - } else if (thread->scheduling_state == static_cast<u32>(ThreadSchedStatus::Runnable)) { - // The thread is now set to running from being stopped - if (thread->processor_id >= 0) { - Schedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread); - } - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (core != static_cast<u32>(thread->processor_id) && - thread->affinity_mask.GetAffinity(core)) { - Suggest(thread->current_priority, core, thread); - } - } - } - - SetReselectionPending(); -} - -void GlobalScheduler::AdjustSchedulingOnPriority(Thread* thread, u32 old_priority) { - if (thread->scheduling_state != static_cast<u32>(ThreadSchedStatus::Runnable)) { - return; - } - ASSERT(is_locked); - if (thread->processor_id >= 0) { - Unschedule(old_priority, static_cast<u32>(thread->processor_id), thread); - } - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (core != static_cast<u32>(thread->processor_id) && - thread->affinity_mask.GetAffinity(core)) { - Unsuggest(old_priority, core, thread); - } - } - - if (thread->processor_id >= 0) { - if (thread == kernel.CurrentScheduler().GetCurrentThread()) { - SchedulePrepend(thread->current_priority, static_cast<u32>(thread->processor_id), - thread); - } else { - Schedule(thread->current_priority, static_cast<u32>(thread->processor_id), thread); - } - } - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (core != static_cast<u32>(thread->processor_id) && - thread->affinity_mask.GetAffinity(core)) { - Suggest(thread->current_priority, core, thread); - } - } - thread->IncrementYieldCount(); - SetReselectionPending(); -} - -void GlobalScheduler::AdjustSchedulingOnAffinity(Thread* thread, u64 old_affinity_mask, - s32 old_core) { - if (thread->scheduling_state != static_cast<u32>(ThreadSchedStatus::Runnable) || - thread->current_priority >= THREADPRIO_COUNT) { - return; - } - ASSERT(is_locked); - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (((old_affinity_mask >> core) & 1) != 0) { - if (core == static_cast<u32>(old_core)) { - Unschedule(thread->current_priority, core, thread); - } else { - Unsuggest(thread->current_priority, core, thread); - } - } - } - - for (u32 core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - if (thread->affinity_mask.GetAffinity(core)) { - if (core == static_cast<u32>(thread->processor_id)) { - Schedule(thread->current_priority, core, thread); - } else { - Suggest(thread->current_priority, core, thread); - } - } - } - - thread->IncrementYieldCount(); - SetReselectionPending(); -} - -void GlobalScheduler::Shutdown() { - for (std::size_t core = 0; core < Core::Hardware::NUM_CPU_CORES; core++) { - scheduled_queue[core].clear(); - suggested_queue[core].clear(); - } - thread_list.clear(); -} - -void GlobalScheduler::Lock() { - Core::EmuThreadHandle current_thread = kernel.GetCurrentEmuThreadID(); - ASSERT(!current_thread.IsInvalid()); - if (current_thread == current_owner) { - ++scope_lock; - } else { - inner_lock.lock(); - is_locked = true; - current_owner = current_thread; - ASSERT(current_owner != Core::EmuThreadHandle::InvalidHandle()); - scope_lock = 1; - } -} - -void GlobalScheduler::Unlock() { - if (--scope_lock != 0) { - ASSERT(scope_lock > 0); - return; - } - u32 cores_pending_reschedule = SelectThreads(); - Core::EmuThreadHandle leaving_thread = current_owner; - current_owner = Core::EmuThreadHandle::InvalidHandle(); - scope_lock = 1; - is_locked = false; - inner_lock.unlock(); - EnableInterruptAndSchedule(cores_pending_reschedule, leaving_thread); -} - -Scheduler::Scheduler(Core::System& system, std::size_t core_id) : system(system), core_id(core_id) { - switch_fiber = std::make_shared<Common::Fiber>(std::function<void(void*)>(OnSwitch), this); -} - -Scheduler::~Scheduler() = default; - -bool Scheduler::HaveReadyThreads() const { - return system.GlobalScheduler().HaveReadyThreads(core_id); -} - -Thread* Scheduler::GetCurrentThread() const { - if (current_thread) { - return current_thread.get(); - } - return idle_thread.get(); -} - -Thread* Scheduler::GetSelectedThread() const { - return selected_thread.get(); -} - -u64 Scheduler::GetLastContextSwitchTicks() const { - return last_context_switch_time; -} - -void Scheduler::TryDoContextSwitch() { - auto& phys_core = system.Kernel().CurrentPhysicalCore(); - if (phys_core.IsInterrupted()) { - phys_core.ClearInterrupt(); - } - guard.lock(); - if (is_context_switch_pending) { - SwitchContext(); - } else { - guard.unlock(); - } -} - -void Scheduler::OnThreadStart() { - SwitchContextStep2(); -} - -void Scheduler::Unload(Thread* thread) { - if (thread) { - thread->last_running_ticks = system.CoreTiming().GetCPUTicks(); - thread->SetIsRunning(false); - if (thread->IsContinuousOnSVC() && !thread->IsHLEThread()) { - system.ArmInterface(core_id).ExceptionalExit(); - thread->SetContinuousOnSVC(false); - } - if (!thread->IsHLEThread() && !thread->HasExited()) { - Core::ARM_Interface& cpu_core = system.ArmInterface(core_id); - cpu_core.SaveContext(thread->GetContext32()); - cpu_core.SaveContext(thread->GetContext64()); - // Save the TPIDR_EL0 system register in case it was modified. - thread->SetTPIDR_EL0(cpu_core.GetTPIDR_EL0()); - cpu_core.ClearExclusiveState(); - } - thread->context_guard.unlock(); - } -} - -void Scheduler::Unload() { - Unload(current_thread.get()); -} - -void Scheduler::Reload(Thread* thread) { - if (thread) { - ASSERT_MSG(thread->GetSchedulingStatus() == ThreadSchedStatus::Runnable, - "Thread must be runnable."); - - // Cancel any outstanding wakeup events for this thread - thread->SetIsRunning(true); - thread->SetWasRunning(false); - thread->last_running_ticks = system.CoreTiming().GetCPUTicks(); - - auto* const thread_owner_process = thread->GetOwnerProcess(); - if (thread_owner_process != nullptr) { - system.Kernel().MakeCurrentProcess(thread_owner_process); - } - if (!thread->IsHLEThread()) { - Core::ARM_Interface& cpu_core = system.ArmInterface(core_id); - cpu_core.LoadContext(thread->GetContext32()); - cpu_core.LoadContext(thread->GetContext64()); - cpu_core.SetTlsAddress(thread->GetTLSAddress()); - cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0()); - cpu_core.ClearExclusiveState(); - } - } -} - -void Scheduler::Reload() { - Reload(current_thread.get()); -} - -void Scheduler::SwitchContextStep2() { - // Load context of new thread - Reload(selected_thread.get()); - - TryDoContextSwitch(); -} - -void Scheduler::SwitchContext() { - current_thread_prev = current_thread; - selected_thread = selected_thread_set; - Thread* previous_thread = current_thread_prev.get(); - Thread* new_thread = selected_thread.get(); - current_thread = selected_thread; - - is_context_switch_pending = false; - - if (new_thread == previous_thread) { - guard.unlock(); - return; - } - - Process* const previous_process = system.Kernel().CurrentProcess(); - - UpdateLastContextSwitchTime(previous_thread, previous_process); - - // Save context for previous thread - Unload(previous_thread); - - std::shared_ptr<Common::Fiber>* old_context; - if (previous_thread != nullptr) { - old_context = &previous_thread->GetHostContext(); - } else { - old_context = &idle_thread->GetHostContext(); - } - guard.unlock(); - - Common::Fiber::YieldTo(*old_context, switch_fiber); - /// When a thread wakes up, the scheduler may have changed to other in another core. - auto& next_scheduler = system.Kernel().CurrentScheduler(); - next_scheduler.SwitchContextStep2(); -} - -void Scheduler::OnSwitch(void* this_scheduler) { - Scheduler* sched = static_cast<Scheduler*>(this_scheduler); - sched->SwitchToCurrent(); -} - -void Scheduler::SwitchToCurrent() { - while (true) { - { - std::scoped_lock lock{guard}; - selected_thread = selected_thread_set; - current_thread = selected_thread; - is_context_switch_pending = false; - } - const auto is_switch_pending = [this] { - std::scoped_lock lock{guard}; - return is_context_switch_pending; - }; - do { - if (current_thread != nullptr && !current_thread->IsHLEThread()) { - current_thread->context_guard.lock(); - if (!current_thread->IsRunnable()) { - current_thread->context_guard.unlock(); - break; - } - if (static_cast<u32>(current_thread->GetProcessorID()) != core_id) { - current_thread->context_guard.unlock(); - break; - } - } - std::shared_ptr<Common::Fiber>* next_context; - if (current_thread != nullptr) { - next_context = ¤t_thread->GetHostContext(); - } else { - next_context = &idle_thread->GetHostContext(); - } - Common::Fiber::YieldTo(switch_fiber, *next_context); - } while (!is_switch_pending()); - } -} - -void Scheduler::UpdateLastContextSwitchTime(Thread* thread, Process* process) { - const u64 prev_switch_ticks = last_context_switch_time; - const u64 most_recent_switch_ticks = system.CoreTiming().GetCPUTicks(); - const u64 update_ticks = most_recent_switch_ticks - prev_switch_ticks; - - if (thread != nullptr) { - thread->UpdateCPUTimeTicks(update_ticks); - } - - if (process != nullptr) { - process->UpdateCPUTimeTicks(update_ticks); - } - - last_context_switch_time = most_recent_switch_ticks; -} - -void Scheduler::Initialize() { - std::string name = "Idle Thread Id:" + std::to_string(core_id); - std::function<void(void*)> init_func = Core::CpuManager::GetIdleThreadStartFunc(); - void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater(); - ThreadType type = static_cast<ThreadType>(THREADTYPE_KERNEL | THREADTYPE_HLE | THREADTYPE_IDLE); - auto thread_res = Thread::Create(system, type, name, 0, 64, 0, static_cast<u32>(core_id), 0, - nullptr, std::move(init_func), init_func_parameter); - idle_thread = std::move(thread_res).Unwrap(); -} - -void Scheduler::Shutdown() { - current_thread = nullptr; - selected_thread = nullptr; -} - -SchedulerLock::SchedulerLock(KernelCore& kernel) : kernel{kernel} { - kernel.GlobalScheduler().Lock(); -} - -SchedulerLock::~SchedulerLock() { - kernel.GlobalScheduler().Unlock(); -} - -SchedulerLockAndSleep::SchedulerLockAndSleep(KernelCore& kernel, Handle& event_handle, - Thread* time_task, s64 nanoseconds) - : SchedulerLock{kernel}, event_handle{event_handle}, time_task{time_task}, nanoseconds{ - nanoseconds} { - event_handle = InvalidHandle; -} - -SchedulerLockAndSleep::~SchedulerLockAndSleep() { - if (sleep_cancelled) { - return; - } - auto& time_manager = kernel.TimeManager(); - time_manager.ScheduleTimeEvent(event_handle, time_task, nanoseconds); -} - -void SchedulerLockAndSleep::Release() { - if (sleep_cancelled) { - return; - } - auto& time_manager = kernel.TimeManager(); - time_manager.ScheduleTimeEvent(event_handle, time_task, nanoseconds); - sleep_cancelled = true; -} - -} // namespace Kernel |