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kern: kill the interrupt task manager thread

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This commit is contained in:
Michael Scire 2021-09-17 16:12:01 -07:00 • committed by SciresM
parent 29cc3d1c09
commit cb28150912
9 changed files with 112 additions and 140 deletions
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31
libraries/libmesosphere/source/kern_k_scheduler.cpp
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@ -55,10 +55,11 @@ namespace ams::kern {
}
void KScheduler::Initialize(KThread *idle_thread) {
/* Set core ID and idle thread. */
m_core_id = GetCurrentCoreId();
m_idle_thread = idle_thread;
m_state.idle_thread_stack = m_idle_thread->GetStackTop();
/* Set core ID/idle thread/interrupt task manager. */
m_core_id = GetCurrentCoreId();
m_idle_thread = idle_thread;
m_state.idle_thread_stack = m_idle_thread->GetStackTop();
m_state.interrupt_task_manager = std::addressof(Kernel::GetInterruptTaskManager());
/* Insert the main thread into the priority queue. */
{
@ -212,19 +213,9 @@ namespace ams::kern {
return cores_needing_scheduling;
}
void KScheduler::InterruptTaskThreadToRunnable() {
MESOSPHERE_ASSERT(GetCurrentThread().GetDisableDispatchCount() == 1);
KThread *task_thread = Kernel::GetInterruptTaskManager().GetThread();
{
KScopedSchedulerLock sl;
task_thread->SetState(KThread::ThreadState_Runnable);
}
}
void KScheduler::SwitchThread(KThread *next_thread) {
KProcess *cur_process = GetCurrentProcessPointer();
KThread *cur_thread = GetCurrentThreadPointer();
KProcess * const cur_process = GetCurrentProcessPointer();
KThread * const cur_thread = GetCurrentThreadPointer();
/* We never want to schedule a null thread, so use the idle thread if we don't have a next. */
if (next_thread == nullptr) {
@ -257,12 +248,10 @@ namespace ams::kern {
if (cur_process != nullptr) {
/* NOTE: Combining this into AMS_LIKELY(!... && ...) triggers an internal compiler error: Segmentation fault in GCC 9.2.0. */
if (AMS_LIKELY(!cur_thread->IsTerminationRequested()) && AMS_LIKELY(cur_thread->GetActiveCore() == m_core_id)) {
m_prev_thread = cur_thread;
m_state.prev_thread = cur_thread;
} else {
m_prev_thread = nullptr;
m_state.prev_thread = nullptr;
}
} else if (cur_thread == m_idle_thread) {
m_prev_thread = nullptr;
}
MESOSPHERE_KTRACE_THREAD_SWITCH(next_thread);
@ -284,7 +273,7 @@ namespace ams::kern {
MESOSPHERE_ASSERT(IsSchedulerLockedByCurrentThread());
for (size_t i = 0; i < cpu::NumCores; ++i) {
/* Get an atomic reference to the core scheduler's previous thread. */
std::atomic_ref<KThread *> prev_thread(Kernel::GetScheduler(static_cast<s32>(i)).m_prev_thread);
std::atomic_ref<KThread *> prev_thread(Kernel::GetScheduler(static_cast<s32>(i)).m_state.prev_thread);
static_assert(std::atomic_ref<KThread *>::is_always_lock_free);
/* Atomically clear the previous thread if it's our target. */