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thread: Implement ChangeCore function.

This commit is contained in:
bunnei 2018-05-05 23:03:01 -04:00
parent 1c36f2a798
commit 6ea8b3ef60
2 changed files with 58 additions and 1 deletions

View file

@ -273,7 +273,7 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
thread->name = std::move(name);
thread->callback_handle = wakeup_callback_handle_table.Create(thread).Unwrap();
thread->owner_process = owner_process;
thread->scheduler = Core::System().GetInstance().Scheduler(static_cast<size_t>(processor_id));
thread->scheduler = Core::System().GetInstance().Scheduler(processor_id);
thread->scheduler->AddThread(thread, priority);
// Find the next available TLS index, and mark it as used
@ -415,6 +415,57 @@ void Thread::UpdatePriority() {
lock_owner->UpdatePriority();
}
static s32 GetNextProcessorId(u64 mask) {
s32 processor_id{};
for (s32 index = 0; index < Core::NUM_CPU_CORES; ++index) {
if (mask & (1ULL << index)) {
if (!Core::System().GetInstance().Scheduler(index)->GetCurrentThread()) {
// Core is enabled and not running any threads, use this one
return index;
}
// Core is enabled, but running a thread, less ideal
processor_id = index;
}
}
return processor_id;
}
void Thread::ChangeCore(u32 core, u64 mask) {
const s32 new_processor_id{GetNextProcessorId(mask)};
ASSERT(ideal_core == core); // We're not doing anything with this yet, so assert the expected
ASSERT(new_processor_id < Core::NUM_CPU_CORES);
if (new_processor_id == processor_id) {
// Already running on ideal core, nothing to do here
return;
}
ASSERT(status != THREADSTATUS_RUNNING); // Unsupported
processor_id = new_processor_id;
ideal_core = core;
mask = mask;
// Add thread to new core's scheduler
auto& next_scheduler = Core::System().GetInstance().Scheduler(new_processor_id);
next_scheduler->AddThread(this, current_priority);
if (status == THREADSTATUS_READY) {
// If the thread was ready, unschedule from the previous core and schedule on the new core
scheduler->UnscheduleThread(this, current_priority);
next_scheduler->ScheduleThread(this, current_priority);
}
// Remove thread from previous core's scheduler
scheduler->RemoveThread(this);
// Change thread's scheduler
scheduler = next_scheduler;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/**

View file

@ -120,6 +120,9 @@ public:
/// Recalculates the current priority taking into account priority inheritance.
void UpdatePriority();
/// Changes the core that the thread is running or scheduled to run on.
void ChangeCore(u32 core, u64 mask);
/**
* Gets the thread's thread ID
* @return The thread's ID
@ -244,6 +247,9 @@ public:
std::shared_ptr<Scheduler> scheduler;
u32 ideal_core{0xFFFFFFFF};
u64 mask{0x1};
private:
Thread();
~Thread() override;