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author | Fernando Sahmkow <fsahmkow27@gmail.com> | 2019-06-19 15:11:18 +0200 |
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committer | FernandoS27 <fsahmkow27@gmail.com> | 2019-10-15 17:55:12 +0200 |
commit | 82218c925af8bcbaa05ae9f39af2d2393de7681f (patch) | |
tree | e38d90c4838679ae59d58f51fff2904b16b1a155 /src/core/hle/kernel/scheduler.cpp | |
parent | Correct PrepareReschedule (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/scheduler.cpp | 78 |
1 files changed, 48 insertions, 30 deletions
diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp index 537640152..df4e9b799 100644 --- a/src/core/hle/kernel/scheduler.cpp +++ b/src/core/hle/kernel/scheduler.cpp @@ -1,6 +1,9 @@ // 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 <set> @@ -19,16 +22,15 @@ namespace Kernel { -/* - * SelectThreads, Yield functions originally by TuxSH. - * licensed under GPLv2 or later under exception provided by the author. - */ +GlobalScheduler::GlobalScheduler(Core::System& system) : system{system} { + reselection_pending = false; +} void GlobalScheduler::AddThread(SharedPtr<Thread> thread) { thread_list.push_back(std::move(thread)); } -void GlobalScheduler::RemoveThread(Thread* thread) { +void GlobalScheduler::RemoveThread(const Thread* thread) { thread_list.erase(std::remove(thread_list.begin(), thread_list.end(), thread), thread_list.end()); } @@ -37,7 +39,7 @@ void GlobalScheduler::RemoveThread(Thread* thread) { * UnloadThread selects a core and forces it to unload its current thread's context */ void GlobalScheduler::UnloadThread(s32 core) { - Scheduler& sched = Core::System::GetInstance().Scheduler(core); + Scheduler& sched = system.Scheduler(core); sched.UnloadThread(); } @@ -52,7 +54,7 @@ void GlobalScheduler::UnloadThread(s32 core) { * thread in another core and swap it with its current thread. */ void GlobalScheduler::SelectThread(u32 core) { - auto update_thread = [](Thread* thread, Scheduler& sched) { + const auto update_thread = [](Thread* thread, Scheduler& sched) { if (thread != sched.selected_thread) { if (thread == nullptr) { ++sched.idle_selection_count; @@ -62,7 +64,7 @@ void GlobalScheduler::SelectThread(u32 core) { sched.context_switch_pending = sched.selected_thread != sched.current_thread; std::atomic_thread_fence(std::memory_order_seq_cst); }; - Scheduler& sched = Core::System::GetInstance().Scheduler(core); + Scheduler& sched = system.Scheduler(core); Thread* current_thread = nullptr; // Step 1: Get top thread in schedule queue. current_thread = scheduled_queue[core].empty() ? nullptr : scheduled_queue[core].front(); @@ -118,8 +120,8 @@ void GlobalScheduler::SelectThread(u32 core) { */ void GlobalScheduler::YieldThread(Thread* yielding_thread) { // Note: caller should use critical section, etc. - u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); - u32 priority = yielding_thread->GetPriority(); + const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); + const u32 priority = yielding_thread->GetPriority(); // Yield the thread ASSERT_MSG(yielding_thread == scheduled_queue[core_id].front(priority), @@ -139,8 +141,8 @@ void GlobalScheduler::YieldThread(Thread* yielding_thread) { void GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) { // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section, // etc. - u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); - u32 priority = yielding_thread->GetPriority(); + const u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); + const u32 priority = yielding_thread->GetPriority(); // Yield the thread ASSERT_MSG(yielding_thread == scheduled_queue[core_id].front(priority), @@ -155,12 +157,13 @@ void GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) { Thread* next_thread = scheduled_queue[core_id].front(priority); Thread* winner = nullptr; for (auto& thread : suggested_queue[core_id]) { - s32 source_core = thread->GetProcessorID(); + 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) + current_threads[source_core]->GetPriority() < min_regular_priority) { continue; + } } if (next_thread->GetLastRunningTicks() >= thread->GetLastRunningTicks() || next_thread->GetPriority() < thread->GetPriority()) { @@ -174,8 +177,9 @@ void GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) { if (winner != nullptr) { if (winner != yielding_thread) { - if (winner->IsRunning()) + if (winner->IsRunning()) { UnloadThread(winner->GetProcessorID()); + } TransferToCore(winner->GetPriority(), core_id, winner); } } else { @@ -195,7 +199,7 @@ void GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread // Note: caller should check if !thread.IsSchedulerOperationRedundant and use critical section, // etc. Thread* winner = nullptr; - u32 core_id = static_cast<u32>(yielding_thread->GetProcessorID()); + 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); @@ -209,9 +213,10 @@ void GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread current_threads[i] = scheduled_queue[i].empty() ? nullptr : scheduled_queue[i].front(); } for (auto& thread : suggested_queue[core_id]) { - s32 source_core = thread->GetProcessorID(); - if (source_core < 0 || thread == current_threads[source_core]) + 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; @@ -220,8 +225,9 @@ void GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread } if (winner != nullptr) { if (winner != yielding_thread) { - if (winner->IsRunning()) + if (winner->IsRunning()) { UnloadThread(winner->GetProcessorID()); + } TransferToCore(winner->GetPriority(), core_id, winner); } } else { @@ -232,6 +238,16 @@ void GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread AskForReselectionOrMarkRedundant(yielding_thread, winner); } +void GlobalScheduler::Schedule(u32 priority, u32 core, Thread* thread) { + ASSERT_MSG(thread->GetProcessorID() == core, "Thread must be assigned to this core."); + scheduled_queue[core].add(thread, priority); +} + +void GlobalScheduler::SchedulePrepend(u32 priority, u32 core, Thread* thread) { + ASSERT_MSG(thread->GetProcessorID() == core, "Thread must be assigned to this core."); + scheduled_queue[core].add(thread, priority, false); +} + void GlobalScheduler::AskForReselectionOrMarkRedundant(Thread* current_thread, Thread* winner) { if (current_thread == winner) { // TODO(blinkhawk): manage redundant operations, this is not implemented. @@ -244,13 +260,13 @@ void GlobalScheduler::AskForReselectionOrMarkRedundant(Thread* current_thread, T GlobalScheduler::~GlobalScheduler() = default; -Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 id) - : system(system), cpu_core(cpu_core), id(id) {} +Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 core_id) + : system(system), cpu_core(cpu_core), core_id(core_id) {} -Scheduler::~Scheduler() {} +Scheduler::~Scheduler() = default; bool Scheduler::HaveReadyThreads() const { - return system.GlobalScheduler().HaveReadyThreads(id); + return system.GlobalScheduler().HaveReadyThreads(core_id); } Thread* Scheduler::GetCurrentThread() const { @@ -262,7 +278,7 @@ Thread* Scheduler::GetSelectedThread() const { } void Scheduler::SelectThreads() { - system.GlobalScheduler().SelectThread(id); + system.GlobalScheduler().SelectThread(core_id); } u64 Scheduler::GetLastContextSwitchTicks() const { @@ -270,13 +286,14 @@ u64 Scheduler::GetLastContextSwitchTicks() const { } void Scheduler::TryDoContextSwitch() { - if (context_switch_pending) + if (context_switch_pending) { SwitchContext(); + } } void Scheduler::UnloadThread() { Thread* const previous_thread = GetCurrentThread(); - Process* const previous_process = Core::CurrentProcess(); + Process* const previous_process = system.Kernel().CurrentProcess(); UpdateLastContextSwitchTime(previous_thread, previous_process); @@ -301,10 +318,11 @@ void Scheduler::SwitchContext() { Thread* const new_thread = GetSelectedThread(); context_switch_pending = false; - if (new_thread == previous_thread) + if (new_thread == previous_thread) { return; + } - Process* const previous_process = Core::CurrentProcess(); + Process* const previous_process = system.Kernel().CurrentProcess(); UpdateLastContextSwitchTime(previous_thread, previous_process); @@ -324,7 +342,7 @@ void Scheduler::SwitchContext() { // Load context of new thread if (new_thread) { - ASSERT_MSG(new_thread->GetProcessorID() == this->id, + ASSERT_MSG(new_thread->GetProcessorID() == this->core_id, "Thread must be assigned to this core."); ASSERT_MSG(new_thread->GetStatus() == ThreadStatus::Ready, "Thread must be ready to become running."); @@ -353,7 +371,7 @@ void Scheduler::SwitchContext() { void Scheduler::UpdateLastContextSwitchTime(Thread* thread, Process* process) { const u64 prev_switch_ticks = last_context_switch_time; - const u64 most_recent_switch_ticks = Core::System::GetInstance().CoreTiming().GetTicks(); + const u64 most_recent_switch_ticks = system.CoreTiming().GetTicks(); const u64 update_ticks = most_recent_switch_ticks - prev_switch_ticks; if (thread != nullptr) { |