kernel: Resolve sign conversion warnings
Uncovered a bug within Thread's SetCoreAndAffinityMask() where an unsigned variable (ideal_core) was being compared against "< 0", which would always be a false condition. We can also get rid of an unused function (GetNextProcessorId) which contained a sign mismatch warning.
This commit is contained in:
parent
86c397dd6e
commit
12dc918937
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@ -35,12 +35,12 @@ void GlobalScheduler::RemoveThread(const Thread* thread) {
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thread_list.end());
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}
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void GlobalScheduler::UnloadThread(s32 core) {
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void GlobalScheduler::UnloadThread(std::size_t core) {
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Scheduler& sched = system.Scheduler(core);
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sched.UnloadThread();
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}
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void GlobalScheduler::SelectThread(u32 core) {
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void GlobalScheduler::SelectThread(std::size_t core) {
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const auto update_thread = [](Thread* thread, Scheduler& sched) {
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if (thread != sched.selected_thread) {
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if (thread == nullptr) {
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@ -77,9 +77,9 @@ void GlobalScheduler::SelectThread(u32 core) {
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// if we got a suggested thread, select it, else do a second pass.
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if (winner && winner->GetPriority() > 2) {
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if (winner->IsRunning()) {
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UnloadThread(winner->GetProcessorID());
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UnloadThread(static_cast<u32>(winner->GetProcessorID()));
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}
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TransferToCore(winner->GetPriority(), core, winner);
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TransferToCore(winner->GetPriority(), static_cast<s32>(core), winner);
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update_thread(winner, sched);
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return;
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}
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@ -91,9 +91,9 @@ void GlobalScheduler::SelectThread(u32 core) {
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Thread* thread_on_core = scheduled_queue[src_core].front();
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Thread* to_change = *it;
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if (thread_on_core->IsRunning() || to_change->IsRunning()) {
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UnloadThread(src_core);
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UnloadThread(static_cast<u32>(src_core));
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}
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TransferToCore(thread_on_core->GetPriority(), core, thread_on_core);
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TransferToCore(thread_on_core->GetPriority(), static_cast<s32>(core), thread_on_core);
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current_thread = thread_on_core;
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break;
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}
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@ -154,9 +154,9 @@ bool GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) {
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if (winner != nullptr) {
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if (winner != yielding_thread) {
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if (winner->IsRunning()) {
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UnloadThread(winner->GetProcessorID());
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UnloadThread(static_cast<u32>(winner->GetProcessorID()));
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}
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TransferToCore(winner->GetPriority(), core_id, winner);
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TransferToCore(winner->GetPriority(), s32(core_id), winner);
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}
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} else {
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winner = next_thread;
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@ -196,9 +196,9 @@ bool GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread
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if (winner != nullptr) {
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if (winner != yielding_thread) {
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if (winner->IsRunning()) {
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UnloadThread(winner->GetProcessorID());
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UnloadThread(static_cast<u32>(winner->GetProcessorID()));
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}
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TransferToCore(winner->GetPriority(), core_id, winner);
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TransferToCore(winner->GetPriority(), static_cast<s32>(core_id), winner);
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}
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} else {
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winner = yielding_thread;
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@ -248,7 +248,7 @@ void GlobalScheduler::PreemptThreads() {
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if (winner != nullptr) {
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if (winner->IsRunning()) {
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UnloadThread(winner->GetProcessorID());
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UnloadThread(static_cast<u32>(winner->GetProcessorID()));
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}
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TransferToCore(winner->GetPriority(), s32(core_id), winner);
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current_thread =
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@ -281,7 +281,7 @@ void GlobalScheduler::PreemptThreads() {
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if (winner != nullptr) {
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if (winner->IsRunning()) {
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UnloadThread(winner->GetProcessorID());
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UnloadThread(static_cast<u32>(winner->GetProcessorID()));
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}
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TransferToCore(winner->GetPriority(), s32(core_id), winner);
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current_thread = winner;
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@ -292,30 +292,30 @@ void GlobalScheduler::PreemptThreads() {
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}
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}
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void GlobalScheduler::Suggest(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::Suggest(u32 priority, std::size_t core, Thread* thread) {
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suggested_queue[core].add(thread, priority);
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}
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void GlobalScheduler::Unsuggest(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::Unsuggest(u32 priority, std::size_t core, Thread* thread) {
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suggested_queue[core].remove(thread, priority);
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}
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void GlobalScheduler::Schedule(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::Schedule(u32 priority, std::size_t core, Thread* thread) {
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ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
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scheduled_queue[core].add(thread, priority);
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}
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void GlobalScheduler::SchedulePrepend(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::SchedulePrepend(u32 priority, std::size_t core, Thread* thread) {
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ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
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scheduled_queue[core].add(thread, priority, false);
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}
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void GlobalScheduler::Reschedule(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::Reschedule(u32 priority, std::size_t core, Thread* thread) {
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scheduled_queue[core].remove(thread, priority);
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scheduled_queue[core].add(thread, priority);
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}
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void GlobalScheduler::Unschedule(u32 priority, u32 core, Thread* thread) {
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void GlobalScheduler::Unschedule(u32 priority, std::size_t core, Thread* thread) {
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scheduled_queue[core].remove(thread, priority);
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}
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@ -327,14 +327,14 @@ void GlobalScheduler::TransferToCore(u32 priority, s32 destination_core, Thread*
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}
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thread->SetProcessorID(destination_core);
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if (source_core >= 0) {
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Unschedule(priority, source_core, thread);
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Unschedule(priority, static_cast<u32>(source_core), thread);
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}
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if (destination_core >= 0) {
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Unsuggest(priority, destination_core, thread);
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Schedule(priority, destination_core, thread);
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Unsuggest(priority, static_cast<u32>(destination_core), thread);
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Schedule(priority, static_cast<u32>(destination_core), thread);
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}
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if (source_core >= 0) {
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Suggest(priority, source_core, thread);
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Suggest(priority, static_cast<u32>(source_core), thread);
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}
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}
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@ -357,7 +357,7 @@ void GlobalScheduler::Shutdown() {
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thread_list.clear();
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}
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Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 core_id)
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Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, std::size_t core_id)
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: system(system), cpu_core(cpu_core), core_id(core_id) {}
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Scheduler::~Scheduler() = default;
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@ -42,41 +42,34 @@ public:
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* Add a thread to the suggested queue of a cpu core. Suggested threads may be
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* picked if no thread is scheduled to run on the core.
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*/
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void Suggest(u32 priority, u32 core, Thread* thread);
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void Suggest(u32 priority, std::size_t core, Thread* thread);
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/**
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* Remove a thread to the suggested queue of a cpu core. Suggested threads may be
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* picked if no thread is scheduled to run on the core.
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*/
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void Unsuggest(u32 priority, u32 core, Thread* thread);
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void Unsuggest(u32 priority, std::size_t core, Thread* thread);
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/**
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* Add a thread to the scheduling queue of a cpu core. The thread is added at the
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* back the queue in its priority level.
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*/
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void Schedule(u32 priority, u32 core, Thread* thread);
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void Schedule(u32 priority, std::size_t core, Thread* thread);
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/**
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* Add a thread to the scheduling queue of a cpu core. The thread is added at the
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* front the queue in its priority level.
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*/
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void SchedulePrepend(u32 priority, u32 core, Thread* thread);
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void SchedulePrepend(u32 priority, std::size_t core, Thread* thread);
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/// Reschedule an already scheduled thread based on a new priority
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void Reschedule(u32 priority, u32 core, Thread* thread);
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void Reschedule(u32 priority, std::size_t core, Thread* thread);
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/// Unschedules a thread.
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void Unschedule(u32 priority, u32 core, Thread* thread);
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/**
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* Transfers a thread into an specific core. If the destination_core is -1
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* it will be unscheduled from its source code and added into its suggested
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* queue.
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*/
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void TransferToCore(u32 priority, s32 destination_core, Thread* thread);
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void Unschedule(u32 priority, std::size_t core, Thread* thread);
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/// Selects a core and forces it to unload its current thread's context
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void UnloadThread(s32 core);
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void UnloadThread(std::size_t core);
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/**
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* Takes care of selecting the new scheduled thread in three steps:
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@ -90,9 +83,9 @@ public:
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* 3. Third is no suggested thread is found, we do a second pass and pick a running
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* thread in another core and swap it with its current thread.
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*/
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void SelectThread(u32 core);
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void SelectThread(std::size_t core);
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bool HaveReadyThreads(u32 core_id) const {
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bool HaveReadyThreads(std::size_t core_id) const {
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return !scheduled_queue[core_id].empty();
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}
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@ -145,6 +138,13 @@ public:
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void Shutdown();
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private:
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/**
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* Transfers a thread into an specific core. If the destination_core is -1
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* it will be unscheduled from its source code and added into its suggested
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* queue.
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*/
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void TransferToCore(u32 priority, s32 destination_core, Thread* thread);
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bool AskForReselectionOrMarkRedundant(Thread* current_thread, const Thread* winner);
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static constexpr u32 min_regular_priority = 2;
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@ -163,7 +163,7 @@ private:
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class Scheduler final {
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public:
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explicit Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 core_id);
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explicit Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, std::size_t core_id);
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~Scheduler();
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/// Returns whether there are any threads that are ready to run.
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@ -220,7 +220,7 @@ private:
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Core::ARM_Interface& cpu_core;
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u64 last_context_switch_time = 0;
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u64 idle_selection_count = 0;
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const u32 core_id;
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const std::size_t core_id;
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bool is_context_switch_pending = false;
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};
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@ -77,18 +77,6 @@ void Thread::CancelWakeupTimer() {
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callback_handle);
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}
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static std::optional<s32> GetNextProcessorId(u64 mask) {
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for (s32 index = 0; index < Core::NUM_CPU_CORES; ++index) {
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if (mask & (1ULL << index)) {
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if (!Core::System::GetInstance().Scheduler(index).GetCurrentThread()) {
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// Core is enabled and not running any threads, use this one
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return index;
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}
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}
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}
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return {};
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}
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void Thread::ResumeFromWait() {
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ASSERT_MSG(wait_objects.empty(), "Thread is waking up while waiting for objects");
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@ -173,7 +161,7 @@ ResultVal<SharedPtr<Thread>> Thread::Create(KernelCore& kernel, std::string name
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if (!Memory::IsValidVirtualAddress(owner_process, entry_point)) {
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LOG_ERROR(Kernel_SVC, "(name={}): invalid entry {:016X}", name, entry_point);
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// TODO (bunnei): Find the correct error code to use here
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return ResultCode(-1);
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return RESULT_UNKNOWN;
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}
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auto& system = Core::System::GetInstance();
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@ -401,7 +389,7 @@ void Thread::SetCurrentPriority(u32 new_priority) {
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ResultCode Thread::SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask) {
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const auto HighestSetCore = [](u64 mask, u32 max_cores) {
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for (s32 core = max_cores - 1; core >= 0; core--) {
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for (s32 core = static_cast<s32>(max_cores - 1); core >= 0; core--) {
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if (((mask >> core) & 1) != 0) {
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return core;
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}
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@ -425,7 +413,7 @@ ResultCode Thread::SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask) {
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if (old_affinity_mask != new_affinity_mask) {
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const s32 old_core = processor_id;
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if (processor_id >= 0 && ((affinity_mask >> processor_id) & 1) == 0) {
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if (ideal_core < 0) {
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if (static_cast<s32>(ideal_core) < 0) {
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processor_id = HighestSetCore(affinity_mask, GlobalScheduler::NUM_CPU_CORES);
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} else {
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processor_id = ideal_core;
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@ -447,23 +435,23 @@ void Thread::AdjustSchedulingOnStatus(u32 old_flags) {
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ThreadSchedStatus::Runnable) {
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// In this case the thread was running, now it's pausing/exitting
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if (processor_id >= 0) {
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scheduler.Unschedule(current_priority, processor_id, this);
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scheduler.Unschedule(current_priority, static_cast<u32>(processor_id), this);
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}
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for (s32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Unsuggest(current_priority, static_cast<u32>(core), this);
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Unsuggest(current_priority, core, this);
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}
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}
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} else if (GetSchedulingStatus() == ThreadSchedStatus::Runnable) {
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// The thread is now set to running from being stopped
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if (processor_id >= 0) {
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scheduler.Schedule(current_priority, processor_id, this);
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scheduler.Schedule(current_priority, static_cast<u32>(processor_id), this);
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}
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for (s32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Suggest(current_priority, static_cast<u32>(core), this);
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Suggest(current_priority, core, this);
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}
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}
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}
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@ -477,11 +465,11 @@ void Thread::AdjustSchedulingOnPriority(u32 old_priority) {
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}
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auto& scheduler = Core::System::GetInstance().GlobalScheduler();
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if (processor_id >= 0) {
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scheduler.Unschedule(old_priority, processor_id, this);
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scheduler.Unschedule(old_priority, static_cast<u32>(processor_id), this);
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}
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
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if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Unsuggest(old_priority, core, this);
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}
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}
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@ -491,14 +479,14 @@ void Thread::AdjustSchedulingOnPriority(u32 old_priority) {
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if (processor_id >= 0) {
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if (current_thread == this) {
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scheduler.SchedulePrepend(current_priority, processor_id, this);
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scheduler.SchedulePrepend(current_priority, static_cast<u32>(processor_id), this);
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} else {
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scheduler.Schedule(current_priority, processor_id, this);
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scheduler.Schedule(current_priority, static_cast<u32>(processor_id), this);
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}
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}
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
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if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
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scheduler.Suggest(current_priority, core, this);
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}
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}
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@ -515,7 +503,7 @@ void Thread::AdjustSchedulingOnAffinity(u64 old_affinity_mask, s32 old_core) {
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (((old_affinity_mask >> core) & 1) != 0) {
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if (core == old_core) {
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if (core == static_cast<u32>(old_core)) {
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scheduler.Unschedule(current_priority, core, this);
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} else {
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scheduler.Unsuggest(current_priority, core, this);
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@ -525,7 +513,7 @@ void Thread::AdjustSchedulingOnAffinity(u64 old_affinity_mask, s32 old_core) {
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for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
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if (((affinity_mask >> core) & 1) != 0) {
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if (core == processor_id) {
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if (core == static_cast<u32>(processor_id)) {
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scheduler.Schedule(current_priority, core, this);
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} else {
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scheduler.Suggest(current_priority, core, this);
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@ -167,7 +167,7 @@ ResultVal<VAddr> VMManager::FindFreeRegion(VAddr begin, VAddr end, u64 size) con
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if (vma_handle == vma_map.cend()) {
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// TODO(Subv): Find the correct error code here.
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return ResultCode(-1);
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return RESULT_UNKNOWN;
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}
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const VAddr target = std::max(begin, vma_handle->second.base);
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