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kernel: fix issues with single core mode

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This commit is contained in:
Liam 2022-07-05 23:27:25 -04:00
parent 0624c880bd
commit 21945ae127
9 changed files with 229 additions and 193 deletions
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160
src/core/cpu_manager.cpp
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@ -42,14 +42,6 @@ void CpuManager::Shutdown() {
}
}
void CpuManager::GuestActivateFunction() {
if (is_multicore) {
MultiCoreGuestActivate();
} else {
SingleCoreGuestActivate();
}
}
void CpuManager::GuestThreadFunction() {
if (is_multicore) {
MultiCoreRunGuestThread();
@ -58,21 +50,16 @@ void CpuManager::GuestThreadFunction() {
}
}
void CpuManager::ShutdownThreadFunction() {
ShutdownThread();
void CpuManager::IdleThreadFunction() {
if (is_multicore) {
MultiCoreRunIdleThread();
} else {
SingleCoreRunIdleThread();
}
}
void CpuManager::WaitForAndHandleInterrupt() {
auto& kernel = system.Kernel();
auto& physical_core = kernel.CurrentPhysicalCore();
ASSERT(Kernel::GetCurrentThread(kernel).GetDisableDispatchCount() == 1);
if (!physical_core.IsInterrupted()) {
physical_core.Idle();
}
HandleInterrupt();
void CpuManager::ShutdownThreadFunction() {
ShutdownThread();
}
void CpuManager::HandleInterrupt() {
@ -86,26 +73,10 @@ void CpuManager::HandleInterrupt() {
/// MultiCore ///
///////////////////////////////////////////////////////////////////////////////
void CpuManager::MultiCoreGuestActivate() {
// Similar to the HorizonKernelMain callback in HOS
auto& kernel = system.Kernel();
auto* scheduler = kernel.CurrentScheduler();
scheduler->Activate();
UNREACHABLE();
}
void CpuManager::MultiCoreRunGuestThread() {
// Similar to UserModeThreadStarter in HOS
auto& kernel = system.Kernel();
auto* thread = kernel.GetCurrentEmuThread();
thread->EnableDispatch();
MultiCoreRunGuestLoop();
}
void CpuManager::MultiCoreRunGuestLoop() {
auto& kernel = system.Kernel();
kernel.CurrentScheduler()->OnThreadStart();
while (true) {
auto* physical_core = &kernel.CurrentPhysicalCore();
@ -118,17 +89,105 @@ void CpuManager::MultiCoreRunGuestLoop() {
}
}
void CpuManager::MultiCoreRunIdleThread() {
// Not accurate to HOS. Remove this entire method when singlecore is removed.
// See notes in KScheduler::ScheduleImpl for more information about why this
// is inaccurate.
auto& kernel = system.Kernel();
kernel.CurrentScheduler()->OnThreadStart();
while (true) {
auto& physical_core = kernel.CurrentPhysicalCore();
if (!physical_core.IsInterrupted()) {
physical_core.Idle();
}
HandleInterrupt();
}
}
///////////////////////////////////////////////////////////////////////////////
/// SingleCore ///
///////////////////////////////////////////////////////////////////////////////
void CpuManager::SingleCoreGuestActivate() {}
void CpuManager::SingleCoreRunGuestThread() {
auto& kernel = system.Kernel();
kernel.CurrentScheduler()->OnThreadStart();
void CpuManager::SingleCoreRunGuestThread() {}
while (true) {
auto* physical_core = &kernel.CurrentPhysicalCore();
if (!physical_core->IsInterrupted()) {
physical_core->Run();
physical_core = &kernel.CurrentPhysicalCore();
}
void CpuManager::SingleCoreRunGuestLoop() {}
kernel.SetIsPhantomModeForSingleCore(true);
system.CoreTiming().Advance();
kernel.SetIsPhantomModeForSingleCore(false);
void CpuManager::PreemptSingleCore(bool from_running_enviroment) {}
PreemptSingleCore();
HandleInterrupt();
}
}
void CpuManager::SingleCoreRunIdleThread() {
auto& kernel = system.Kernel();
kernel.CurrentScheduler()->OnThreadStart();
while (true) {
PreemptSingleCore(false);
system.CoreTiming().AddTicks(1000U);
idle_count++;
HandleInterrupt();
}
}
void CpuManager::PreemptSingleCore(bool from_running_environment) {
{
auto& kernel = system.Kernel();
auto& scheduler = kernel.Scheduler(current_core);
Kernel::KThread* current_thread = scheduler.GetSchedulerCurrentThread();
if (idle_count >= 4 || from_running_environment) {
if (!from_running_environment) {
system.CoreTiming().Idle();
idle_count = 0;
}
kernel.SetIsPhantomModeForSingleCore(true);
system.CoreTiming().Advance();
kernel.SetIsPhantomModeForSingleCore(false);
}
current_core.store((current_core + 1) % Core::Hardware::NUM_CPU_CORES);
system.CoreTiming().ResetTicks();
scheduler.Unload(scheduler.GetSchedulerCurrentThread());
auto& next_scheduler = kernel.Scheduler(current_core);
// Disable dispatch. We're about to preempt this thread.
Kernel::KScopedDisableDispatch dd{kernel};
Common::Fiber::YieldTo(current_thread->GetHostContext(), *next_scheduler.GetSwitchFiber());
}
// We've now been scheduled again, and we may have exchanged schedulers.
// Reload the scheduler in case it's different.
{
auto& scheduler = system.Kernel().Scheduler(current_core);
scheduler.Reload(scheduler.GetSchedulerCurrentThread());
if (!scheduler.IsIdle()) {
idle_count = 0;
}
}
}
void CpuManager::GuestActivate() {
// Similar to the HorizonKernelMain callback in HOS
auto& kernel = system.Kernel();
auto* scheduler = kernel.CurrentScheduler();
scheduler->Activate();
UNREACHABLE();
}
void CpuManager::ShutdownThread() {
auto& kernel = system.Kernel();
@ -168,20 +227,11 @@ void CpuManager::RunThread(std::size_t core) {
}
auto& kernel = system.Kernel();
auto& scheduler = *kernel.CurrentScheduler();
auto* thread = scheduler.GetSchedulerCurrentThread();
Kernel::SetCurrentThread(kernel, thread);
auto* main_thread = Kernel::KThread::Create(kernel);
main_thread->SetName(fmt::format("MainThread:{}", core));
ASSERT(Kernel::KThread::InitializeMainThread(system, main_thread, static_cast<s32>(core))
.IsSuccess());
auto* idle_thread = Kernel::KThread::Create(kernel);
ASSERT(Kernel::KThread::InitializeIdleThread(system, idle_thread, static_cast<s32>(core))
.IsSuccess());
kernel.SetCurrentEmuThread(main_thread);
kernel.CurrentScheduler()->Initialize(idle_thread);
Common::Fiber::YieldTo(data.host_context, *main_thread->GetHostContext());
Common::Fiber::YieldTo(data.host_context, *thread->GetHostContext());
}
} // namespace Core