From 409dcf0e0aecfdb676fd3b64223a25e47c1b1c1a Mon Sep 17 00:00:00 2001 From: Zach Hilman Date: Sun, 18 Nov 2018 23:44:19 -0500 Subject: svc: Implement yield types 0 and -1 --- src/common/thread_queue_list.h | 16 +++++++++++ src/core/hle/kernel/scheduler.cpp | 18 ++++++++++++ src/core/hle/kernel/scheduler.h | 6 ++++ src/core/hle/kernel/svc.cpp | 27 ++++++++++++++++-- src/core/hle/kernel/thread.cpp | 60 +++++++++++++++++++++++++++++++++++++++ src/core/hle/kernel/thread.h | 5 ++++ 6 files changed, 130 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/common/thread_queue_list.h b/src/common/thread_queue_list.h index 133122c5f..323eab97c 100644 --- a/src/common/thread_queue_list.h +++ b/src/common/thread_queue_list.h @@ -6,6 +6,7 @@ #include #include +#include #include namespace Common { @@ -49,6 +50,21 @@ struct ThreadQueueList { return T(); } + T get_first_filter(std::function filter) const { + const Queue* cur = first; + while (cur != nullptr) { + if (!cur->data.empty()) { + for (const auto& item : cur->data) { + if (filter(item)) + return item; + } + } + cur = cur->next_nonempty; + } + + return T(); + } + T pop_first() { Queue* cur = first; while (cur != nullptr) { diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp index 5a5f4cef1..fb5e14950 100644 --- a/src/core/hle/kernel/scheduler.cpp +++ b/src/core/hle/kernel/scheduler.cpp @@ -169,6 +169,16 @@ void Scheduler::UnscheduleThread(Thread* thread, u32 priority) { ready_queue.remove(priority, thread); } +void Scheduler::RescheduleThread(Thread* thread, u32 priority) { + std::lock_guard lock(scheduler_mutex); + + // Thread is not in queue + ASSERT(ready_queue.contains(thread) != -1); + + ready_queue.remove(priority, thread); + ready_queue.push_back(priority, thread); +} + void Scheduler::SetThreadPriority(Thread* thread, u32 priority) { std::lock_guard lock(scheduler_mutex); @@ -179,4 +189,12 @@ void Scheduler::SetThreadPriority(Thread* thread, u32 priority) { ready_queue.prepare(priority); } +Thread* Scheduler::GetNextSuggestedThread(u32 core) { + std::lock_guard lock(scheduler_mutex); + + const auto mask = 1 << core; + return ready_queue.get_first_filter( + [&mask](Thread* thread) { return (thread->GetAffinityMask() & mask) != 0; }); +} + } // namespace Kernel diff --git a/src/core/hle/kernel/scheduler.h b/src/core/hle/kernel/scheduler.h index c63032b7d..8444afdbc 100644 --- a/src/core/hle/kernel/scheduler.h +++ b/src/core/hle/kernel/scheduler.h @@ -48,9 +48,15 @@ public: /// Unschedules a thread that was already scheduled void UnscheduleThread(Thread* thread, u32 priority); + /// Moves a thread to the back of the current priority queue + void RescheduleThread(Thread* thread, u32 priority); + /// Sets the priority of a thread in the scheduler void SetThreadPriority(Thread* thread, u32 priority); + /// Gets the next suggested thread for load balancing + Thread* GetNextSuggestedThread(u32 core); + /// Returns a list of all threads managed by the scheduler const std::vector>& GetThreadList() const { return thread_list; diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index 75dbfc31d..467575c93 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -962,16 +962,39 @@ static void SleepThread(s64 nanoseconds) { // Don't attempt to yield execution if there are no available threads to run, // this way we avoid a useless reschedule to the idle thread. - if (nanoseconds == 0 && !Core::System::GetInstance().CurrentScheduler().HaveReadyThreads()) + if (!Core::System::GetInstance().CurrentScheduler().HaveReadyThreads()) return; + if (nanoseconds <= 0) { + switch (nanoseconds) { + case 0: + GetCurrentThread()->YieldNormal(); + break; + case -1: + GetCurrentThread()->YieldWithLoadBalancing(); + break; + case -2: + GetCurrentThread()->YieldAndWaitForLoadBalancing(); + break; + default: + UNREACHABLE_MSG( + "Unimplemented sleep yield type '{:016X}'! Falling back to forced reschedule...", + nanoseconds); + } + + nanoseconds = 0; + } + // Sleep current thread and check for next thread to schedule WaitCurrentThread_Sleep(); // Create an event to wake the thread up after the specified nanosecond delay has passed GetCurrentThread()->WakeAfterDelay(nanoseconds); - Core::System::GetInstance().PrepareReschedule(); + Core::System::GetInstance().CpuCore(0).PrepareReschedule(); + Core::System::GetInstance().CpuCore(1).PrepareReschedule(); + Core::System::GetInstance().CpuCore(2).PrepareReschedule(); + Core::System::GetInstance().CpuCore(3).PrepareReschedule(); } /// Wait process wide key atomic diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp index 4ffb76818..ddc4da1c0 100644 --- a/src/core/hle/kernel/thread.cpp +++ b/src/core/hle/kernel/thread.cpp @@ -388,6 +388,66 @@ bool Thread::InvokeWakeupCallback(ThreadWakeupReason reason, SharedPtr t return wakeup_callback(reason, std::move(thread), std::move(object), index); } +void Thread::YieldNormal() { + // Avoid yielding if the thread isn't even running. + if (status != ThreadStatus::Running) { + return; + } + + if (nominal_priority < THREADPRIO_COUNT) { + scheduler->RescheduleThread(this, nominal_priority); + scheduler->Reschedule(); + } +} + +void Thread::YieldWithLoadBalancing() { + auto priority = nominal_priority; + auto core = processor_id; + + // Avoid yielding if the thread isn't even running. + if (status != ThreadStatus::Running) { + Core::System::GetInstance().CpuCore(processor_id).PrepareReschedule(); + return; + } + + SharedPtr next; + const auto& threads = scheduler->GetThreadList(); + + if (priority < THREADPRIO_COUNT) { + // Reschedule thread to end of queue. + scheduler->RescheduleThread(this, priority); + + const auto iter = std::find_if(threads.begin(), threads.end(), + [&priority](const SharedPtr& thread) { + return thread->GetNominalPriority() == priority; + }); + + if (iter != threads.end()) + next = iter->get(); + } + + Thread* suggested_thread = nullptr; + + for (int i = 0; i < 4; ++i) { + if (i == core) + continue; + + const auto res = + Core::System::GetInstance().CpuCore(i).Scheduler().GetNextSuggestedThread(core); + if (res != nullptr) { + suggested_thread = res; + break; + } + } + + if (suggested_thread != nullptr) + suggested_thread->ChangeCore(core, suggested_thread->GetAffinityMask()); +} + +void Thread::YieldAndWaitForLoadBalancing() { + UNIMPLEMENTED_MSG("Wait for load balancing thread yield type is not implemented!"); +} + //////////////////////////////////////////////////////////////////////////////////////////////////// /** diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h index d384d50db..e97434dd8 100644 --- a/src/core/hle/kernel/thread.h +++ b/src/core/hle/kernel/thread.h @@ -26,6 +26,7 @@ enum ThreadPriority : u32 { THREADPRIO_USERLAND_MAX = 24, ///< Highest thread priority for userland apps THREADPRIO_DEFAULT = 44, ///< Default thread priority for userland apps THREADPRIO_LOWEST = 63, ///< Lowest thread priority + THREADPRIO_COUNT = 64, ///< Total number of possible thread priorities. }; enum ThreadProcessorId : s32 { @@ -370,6 +371,10 @@ public: return affinity_mask; } + void YieldNormal(); + void YieldWithLoadBalancing(); + void YieldAndWaitForLoadBalancing(); + private: explicit Thread(KernelCore& kernel); ~Thread() override; -- cgit v1.2.3