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kernel: Implement thread pinning support (#2840)

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* kernel: Implement Thread pinning support

This commit adds support for 8.x thread pinning changes and implement SynchronizePreemptionState syscall.

Based on kernel 13.x reverse.

* Address gdkchan's comment

* kernel: fix missing critical section leave in SetActivity

Fix Unity games

* Implement missing bits on the interrupt handler and inline update pinning function as it cannot be generic

* Fix some bugs in SetActivity and SetCoreAndAffinityMask

* Address gdkchan's comments
This commit is contained in:
Mary 2021-12-30 10:55:06 +01:00 committed by GitHub
parent 8544b1445b
commit e96ef6d532
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 436 additions and 95 deletions
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56
Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
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@ -46,6 +46,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
public KAddressArbiter AddressArbiter { get; private set; }
public long[] RandomEntropy { get; private set; }
public KThread[] PinnedThreads { get; private set; }
private bool _signaled;
@ -102,6 +103,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
Capabilities = new KProcessCapabilities();
RandomEntropy = new long[KScheduler.CpuCoresCount];
PinnedThreads = new KThread[KScheduler.CpuCoresCount];
// TODO: Remove once we no longer need to initialize it externally.
HandleTable = new KHandleTable(context);
@ -749,7 +751,24 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
{
KThread currentThread = KernelStatic.GetCurrentThread();
if (currentThread.IsSchedulable)
if (currentThread.Owner != null &&
currentThread.GetUserDisableCount() != 0 &&
currentThread.Owner.PinnedThreads[currentThread.CurrentCore] == null)
{
KernelContext.CriticalSection.Enter();
currentThread.Owner.PinThread(currentThread);
currentThread.SetUserInterruptFlag();
if (currentThread.IsSchedulable)
{
KernelContext.Schedulers[currentThread.CurrentCore].Schedule();
}
KernelContext.CriticalSection.Leave();
}
else if (currentThread.IsSchedulable)
{
KernelContext.Schedulers[currentThread.CurrentCore].Schedule();
}
@ -952,6 +971,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
{
KernelContext.CriticalSection.Enter();
if (currentThread != null && PinnedThreads[currentThread.CurrentCore] == currentThread)
{
UnpinThread(currentThread);
}
foreach (KThread thread in _threads)
{
if ((thread.SchedFlags & ThreadSchedState.LowMask) != ThreadSchedState.TerminationPending)
@ -1139,5 +1163,35 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
return KernelResult.InvalidState;
}
public void PinThread(KThread thread)
{
if (!thread.TerminationRequested)
{
PinnedThreads[thread.CurrentCore] = thread;
thread.Pin();
KernelContext.ThreadReselectionRequested = true;
}
}
public void UnpinThread(KThread thread)
{
if (!thread.TerminationRequested)
{
thread.Unpin();
PinnedThreads[thread.CurrentCore] = null;
KernelContext.ThreadReselectionRequested = true;
}
}
public bool IsExceptionUserThread(KThread thread)
{
// TODO
return false;
}
}
}

7
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
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@ -2655,6 +2655,13 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
};
}
public KernelResult SynchronizePreemptionState()
{
KernelStatic.GetCurrentThread().SynchronizePreemptionState();
return KernelResult.Success;
}
private bool IsPointingInsideKernel(ulong address)
{
return (address + 0x1000000000) < 0xffffff000;

5
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall32.cs
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@ -491,5 +491,10 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
{
return _syscall.SignalToAddress(address, type, value, count);
}
public KernelResult SynchronizePreemptionState32()
{
return _syscall.SynchronizePreemptionState();
}
}
}

5
Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall64.cs
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@ -405,5 +405,10 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
{
return _syscall.SignalToAddress(address, type, value, count);
}
public KernelResult SynchronizePreemptionState64()
{
return _syscall.SynchronizePreemptionState();
}
}
}

24
Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallHandler.cs
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@ -19,7 +19,22 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
public void SvcCall(object sender, InstExceptionEventArgs e)
{
ExecutionContext context = (ExecutionContext)sender;
KThread currentThread = KernelStatic.GetCurrentThread();
if (currentThread.Owner != null &&
currentThread.GetUserDisableCount() != 0 &&
currentThread.Owner.PinnedThreads[currentThread.CurrentCore] == null)
{
_context.CriticalSection.Enter();
currentThread.Owner.PinThread(currentThread);
currentThread.SetUserInterruptFlag();
_context.CriticalSection.Leave();
}
ExecutionContext context = (ExecutionContext)sender;
if (context.IsAarch32)
{
@ -44,13 +59,6 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
svcFunc(_syscall64, context);
}
PostSvcHandler();
}
private void PostSvcHandler()
{
KThread currentThread = KernelStatic.GetCurrentThread();
currentThread.HandlePostSyscall();
}
}

2
Ryujinx.HLE/HOS/Kernel/SupervisorCall/SyscallTable.cs
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@ -71,6 +71,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
{ 0x33, nameof(Syscall64.GetThreadContext364) },
{ 0x34, nameof(Syscall64.WaitForAddress64) },
{ 0x35, nameof(Syscall64.SignalToAddress64) },
{ 0x36, nameof(Syscall64.SynchronizePreemptionState64) },
{ 0x37, nameof(Syscall64.GetResourceLimitPeakValue64) },
{ 0x40, nameof(Syscall64.CreateSession64) },
{ 0x41, nameof(Syscall64.AcceptSession64) },
@ -145,6 +146,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
{ 0x33, nameof(Syscall32.GetThreadContext332) },
{ 0x34, nameof(Syscall32.WaitForAddress32) },
{ 0x35, nameof(Syscall32.SignalToAddress32) },
{ 0x36, nameof(Syscall32.SynchronizePreemptionState32) },
{ 0x37, nameof(Syscall32.GetResourceLimitPeakValue32) },
{ 0x40, nameof(Syscall32.CreateSession32) },
{ 0x41, nameof(Syscall32.AcceptSession32) },

21
Ryujinx.HLE/HOS/Kernel/Threading/KScheduler.cs
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@ -36,6 +36,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
private readonly KThread _idleThread;
public KThread PreviousThread => _previousThread;
public KThread CurrentThread => _currentThread;
public long LastContextSwitchTime { get; private set; }
public long TotalIdleTimeTicks => _idleThread.TotalTimeRunning;
@ -87,6 +88,26 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
KThread thread = context.PriorityQueue.ScheduledThreads(core).FirstOrDefault();
if (thread != null &&
thread.Owner != null &&
thread.Owner.PinnedThreads[core] != null &&
thread.Owner.PinnedThreads[core] != thread)
{
KThread candidate = thread.Owner.PinnedThreads[core];
if (candidate.KernelWaitersCount == 0 && !thread.Owner.IsExceptionUserThread(candidate))
{
if (candidate.SchedFlags == ThreadSchedState.Running)
{
thread = candidate;
}
else
{
thread = null;
}
}
}
scheduledCoresMask |= context.Schedulers[core].SelectThread(thread);
}

408
Ryujinx.HLE/HOS/Kernel/Threading/KThread.cs
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@ -11,6 +11,9 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
class KThread : KSynchronizationObject, IKFutureSchedulerObject
{
private const int TlsUserDisableCountOffset = 0x100;
private const int TlsUserInterruptFlagOffset = 0x102;
public const int MaxWaitSyncObjects = 64;
private ManualResetEvent _schedulerWaitEvent;
@ -43,6 +46,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
public bool IsSchedulable => _customThreadStart == null && !_forcedUnschedulable;
public ulong MutexAddress { get; set; }
public int KernelWaitersCount { get; private set; }
public KProcess Owner { get; private set; }
@ -65,11 +69,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
private LinkedList<KThread> _mutexWaiters;
private LinkedListNode<KThread> _mutexWaiterNode;
private LinkedList<KThread> _pinnedWaiters;
public KThread MutexOwner { get; private set; }
public int ThreadHandleForUserMutex { get; set; }
private ThreadSchedState _forcePauseFlags;
private ThreadSchedState _forcePausePermissionFlags;
public KernelResult ObjSyncResult { get; set; }
@ -79,11 +86,12 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
public int CurrentCore { get; set; }
public int ActiveCore { get; set; }
private long _affinityMaskOverride;
private int _preferredCoreOverride;
#pragma warning disable CS0649
private int _affinityOverrideCount;
#pragma warning restore CS0649
public bool IsPinned { get; private set; }
private long _originalAffinityMask;
private int _originalPreferredCore;
private int _originalBasePriority;
private int _coreMigrationDisableCount;
public ThreadSchedState SchedFlags { get; private set; }
@ -108,6 +116,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
public long LastPc { get; set; }
private object ActivityOperationLock = new object();
public KThread(KernelContext context) : base(context)
{
WaitSyncObjects = new KSynchronizationObject[MaxWaitSyncObjects];
@ -116,6 +126,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
SiblingsPerCore = new LinkedListNode<KThread>[KScheduler.CpuCoresCount];
_mutexWaiters = new LinkedList<KThread>();
_pinnedWaiters = new LinkedList<KThread>();
}
public KernelResult Initialize(
@ -147,6 +158,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
DynamicPriority = priority;
BasePriority = priority;
CurrentCore = cpuCore;
IsPinned = false;
_entrypoint = entrypoint;
_customThreadStart = customThreadStart;
@ -204,6 +216,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
_hasBeenInitialized = true;
_forcePausePermissionFlags = ThreadSchedState.ForcePauseMask;
if (owner != null)
{
owner.SubscribeThreadEventHandlers(Context);
@ -301,6 +315,11 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
KernelContext.CriticalSection.Enter();
if (Owner != null && Owner.PinnedThreads[KernelStatic.GetCurrentThread().CurrentCore] == this)
{
Owner.UnpinThread(this);
}
ThreadSchedState result;
if (Interlocked.CompareExchange(ref _shallBeTerminated, 1, 0) == 0)
@ -405,6 +424,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
KernelContext.CriticalSection.Enter();
_forcePauseFlags &= ~ThreadSchedState.ForcePauseMask;
_forcePausePermissionFlags = 0;
bool decRef = ExitImpl();
@ -433,6 +453,19 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
return decRef;
}
private int GetEffectiveRunningCore()
{
for (int coreNumber = 0; coreNumber < KScheduler.CpuCoresCount; coreNumber++)
{
if (KernelContext.Schedulers[coreNumber].CurrentThread == this)
{
return coreNumber;
}
}
return -1;
}
public KernelResult Sleep(long timeout)
{
KernelContext.CriticalSection.Enter();
@ -465,7 +498,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
KernelContext.CriticalSection.Enter();
BasePriority = priority;
if (IsPinned)
{
_originalBasePriority = priority;
}
else
{
BasePriority = priority;
}
UpdatePriorityInheritance();
@ -497,53 +537,96 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
public KernelResult SetActivity(bool pause)
{
KernelResult result = KernelResult.Success;
KernelContext.CriticalSection.Enter();
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
if (lowNibble != ThreadSchedState.Paused && lowNibble != ThreadSchedState.Running)
lock (ActivityOperationLock)
{
KernelResult result = KernelResult.Success;
KernelContext.CriticalSection.Enter();
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
if (lowNibble != ThreadSchedState.Paused && lowNibble != ThreadSchedState.Running)
{
KernelContext.CriticalSection.Leave();
return KernelResult.InvalidState;
}
if (!ShallBeTerminated && SchedFlags != ThreadSchedState.TerminationPending)
{
if (pause)
{
// Pause, the force pause flag should be clear (thread is NOT paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) == 0)
{
Suspend(ThreadSchedState.ThreadPauseFlag);
}
else
{
result = KernelResult.InvalidState;
}
}
else
{
// Unpause, the force pause flag should be set (thread is paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) != 0)
{
Resume(ThreadSchedState.ThreadPauseFlag);
}
else
{
result = KernelResult.InvalidState;
}
}
}
KernelContext.CriticalSection.Leave();
return KernelResult.InvalidState;
}
KernelContext.CriticalSection.Enter();
if (!ShallBeTerminated && SchedFlags != ThreadSchedState.TerminationPending)
{
if (pause)
if (result == KernelResult.Success && pause)
{
// Pause, the force pause flag should be clear (thread is NOT paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) == 0)
bool isThreadRunning = true;
while (isThreadRunning)
{
Suspend(ThreadSchedState.ThreadPauseFlag);
}
else
{
result = KernelResult.InvalidState;
}
}
else
{
// Unpause, the force pause flag should be set (thread is paused).
if ((_forcePauseFlags & ThreadSchedState.ThreadPauseFlag) != 0)
{
Resume(ThreadSchedState.ThreadPauseFlag);
}
else
{
result = KernelResult.InvalidState;
KernelContext.CriticalSection.Enter();
if (TerminationRequested)
{
KernelContext.CriticalSection.Leave();
break;
}
isThreadRunning = false;
if (IsPinned)
{
KThread currentThread = KernelStatic.GetCurrentThread();
if (currentThread.TerminationRequested)
{
KernelContext.CriticalSection.Leave();
result = KernelResult.ThreadTerminating;
break;
}
_pinnedWaiters.AddLast(currentThread);
currentThread.Reschedule(ThreadSchedState.Paused);
}
else
{
isThreadRunning = GetEffectiveRunningCore() >= 0;
}
KernelContext.CriticalSection.Leave();
}
}
return result;
}
KernelContext.CriticalSection.Leave();
KernelContext.CriticalSection.Leave();
return result;
}
public void CancelSynchronization()
@ -579,58 +662,105 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
public KernelResult SetCoreAndAffinityMask(int newCore, long newAffinityMask)
{
KernelContext.CriticalSection.Enter();
bool useOverride = _affinityOverrideCount != 0;
// The value -3 is "do not change the preferred core".
if (newCore == -3)
lock (ActivityOperationLock)
{
newCore = useOverride ? _preferredCoreOverride : PreferredCore;
KernelContext.CriticalSection.Enter();
if ((newAffinityMask & (1 << newCore)) == 0)
bool isCoreMigrationDisabled = _coreMigrationDisableCount != 0;
// The value -3 is "do not change the preferred core".
if (newCore == -3)
{
KernelContext.CriticalSection.Leave();
newCore = isCoreMigrationDisabled ? _originalPreferredCore : PreferredCore;
return KernelResult.InvalidCombination;
}
}
if (useOverride)
{
_preferredCoreOverride = newCore;
_affinityMaskOverride = newAffinityMask;
}
else
{
long oldAffinityMask = AffinityMask;
PreferredCore = newCore;
AffinityMask = newAffinityMask;
if (oldAffinityMask != newAffinityMask)
{
int oldCore = ActiveCore;
if (oldCore >= 0 && ((AffinityMask >> oldCore) & 1) == 0)
if ((newAffinityMask & (1 << newCore)) == 0)
{
if (PreferredCore < 0)
KernelContext.CriticalSection.Leave();
return KernelResult.InvalidCombination;
}
}
if (isCoreMigrationDisabled)
{
_originalPreferredCore = newCore;
_originalAffinityMask = newAffinityMask;
}
else
{
long oldAffinityMask = AffinityMask;
PreferredCore = newCore;
AffinityMask = newAffinityMask;
if (oldAffinityMask != newAffinityMask)
{
int oldCore = ActiveCore;
if (oldCore >= 0 && ((AffinityMask >> oldCore) & 1) == 0)
{
ActiveCore = sizeof(ulong) * 8 - 1 - BitOperations.LeadingZeroCount((ulong)AffinityMask);
if (PreferredCore < 0)
{
ActiveCore = sizeof(ulong) * 8 - 1 - BitOperations.LeadingZeroCount((ulong)AffinityMask);
}
else
{
ActiveCore = PreferredCore;
}
}
AdjustSchedulingForNewAffinity(oldAffinityMask, oldCore);
}
}
KernelContext.CriticalSection.Leave();
bool targetThreadPinned = true;
while (targetThreadPinned)
{
KernelContext.CriticalSection.Enter();
if (TerminationRequested)
{
KernelContext.CriticalSection.Leave();
break;
}
targetThreadPinned = false;
int coreNumber = GetEffectiveRunningCore();
bool isPinnedThreadCurrentlyRunning = coreNumber >= 0;
if (isPinnedThreadCurrentlyRunning && ((1 << coreNumber) & AffinityMask) == 0)
{
if (IsPinned)
{
KThread currentThread = KernelStatic.GetCurrentThread();
if (currentThread.TerminationRequested)
{
KernelContext.CriticalSection.Leave();
return KernelResult.ThreadTerminating;
}
_pinnedWaiters.AddLast(currentThread);
currentThread.Reschedule(ThreadSchedState.Paused);
}
else
{
ActiveCore = PreferredCore;
targetThreadPinned = true;
}
}
AdjustSchedulingForNewAffinity(oldAffinityMask, oldCore);
KernelContext.CriticalSection.Leave();
}
return KernelResult.Success;
}
KernelContext.CriticalSection.Leave();
return KernelResult.Success;
}
private void CombineForcePauseFlags()
@ -638,7 +768,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
ThreadSchedState oldFlags = SchedFlags;
ThreadSchedState lowNibble = SchedFlags & ThreadSchedState.LowMask;
SchedFlags = lowNibble | _forcePauseFlags;
SchedFlags = lowNibble | (_forcePauseFlags & _forcePausePermissionFlags);
AdjustScheduling(oldFlags);
}
@ -1106,7 +1236,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
foreach (KThread thread in _mutexWaiters)
{
thread.MutexOwner = null;
thread._preferredCoreOverride = 0;
thread._originalPreferredCore = 0;
thread.ObjSyncResult = KernelResult.InvalidState;
thread.ReleaseAndResume();
@ -1116,5 +1246,113 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
Owner?.DecrementThreadCountAndTerminateIfZero();
}
public void Pin()
{
IsPinned = true;
_coreMigrationDisableCount++;
int activeCore = ActiveCore;
_originalPreferredCore = PreferredCore;
_originalAffinityMask = AffinityMask;
ActiveCore = CurrentCore;
PreferredCore = CurrentCore;
AffinityMask = 1 << CurrentCore;
if (activeCore != CurrentCore || _originalAffinityMask != AffinityMask)
{
AdjustSchedulingForNewAffinity(_originalAffinityMask, activeCore);
}
_originalBasePriority = BasePriority;
BasePriority = Math.Min(_originalBasePriority, BitOperations.TrailingZeroCount(Owner.Capabilities.AllowedThreadPriosMask) - 1);
UpdatePriorityInheritance();
// Disallows thread pausing
_forcePausePermissionFlags &= ~ThreadSchedState.ThreadPauseFlag;
CombineForcePauseFlags();
// TODO: Assign reduced SVC permissions
}
public void Unpin()
{
IsPinned = false;
_coreMigrationDisableCount--;
long affinityMask = AffinityMask;
int activeCore = ActiveCore;
PreferredCore = _originalPreferredCore;
AffinityMask = _originalAffinityMask;
if (AffinityMask != affinityMask)
{
if ((AffinityMask & 1 << ActiveCore) != 0)
{
if (PreferredCore >= 0)
{
ActiveCore = PreferredCore;
}
else
{
ActiveCore = sizeof(ulong) * 8 - 1 - BitOperations.LeadingZeroCount((ulong)AffinityMask);
}
AdjustSchedulingForNewAffinity(affinityMask, activeCore);
}
}
BasePriority = _originalBasePriority;
UpdatePriorityInheritance();
if (!TerminationRequested)
{
// Allows thread pausing
_forcePausePermissionFlags |= ThreadSchedState.ThreadPauseFlag;
CombineForcePauseFlags();
// TODO: Restore SVC permissions
}
// Wake up waiters
foreach (KThread waiter in _pinnedWaiters)
{
waiter.ReleaseAndResume();
}
_pinnedWaiters.Clear();
}
public void SynchronizePreemptionState()
{
KernelContext.CriticalSection.Enter();
if (Owner != null && Owner.PinnedThreads[CurrentCore] == this)
{
ClearUserInterruptFlag();
Owner.UnpinThread(this);
}
KernelContext.CriticalSection.Leave();
}
public ushort GetUserDisableCount()
{
return Owner.CpuMemory.Read<ushort>(_tlsAddress + TlsUserDisableCountOffset);
}
public void SetUserInterruptFlag()
{
Owner.CpuMemory.Write<ushort>(_tlsAddress + TlsUserInterruptFlagOffset, 1);
}
public void ClearUserInterruptFlag()
{
Owner.CpuMemory.Write<ushort>(_tlsAddress + TlsUserInterruptFlagOffset, 0);
}
}
}

3
Ryujinx.HLE/HOS/Kernel/Threading/ThreadSchedState.cs
View File

@ -4,11 +4,12 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
{
LowMask = 0xf,
HighMask = 0xfff0,
ForcePauseMask = 0x70,
ForcePauseMask = 0x1f0,
ProcessPauseFlag = 1 << 4,
ThreadPauseFlag = 1 << 5,
ProcessDebugPauseFlag = 1 << 6,
BacktracePauseFlag = 1 << 7,
KernelInitPauseFlag = 1 << 8,
None = 0,