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kernel: Fix sleep timing accuracy (#2828)
* kernel: Fix sleep timing accuracy This commit corrects some mistake while comparing reversing of kernel 13.x with our own. WaitAndCheckScheduledObjects timing accuracy was also improved. * Make KTimeManager.WaitAndCheckScheduledObjects spin wait for sub milliseconds Fix performance regression on Pokemon Let's Go games and possibly others. * Address rip's comment * kernel: Fix issues with timeout of -1 (0xFFFFFFFF) Fixes possible hang on Pokemon DP and possibly others
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@ -8,6 +8,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
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{
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class KTimeManager : IDisposable
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{
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public static readonly long DefaultTimeIncrementNanoseconds = ConvertGuestTicksToNanoseconds(2);
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private class WaitingObject
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{
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public IKFutureSchedulerObject Object { get; }
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@ -24,6 +26,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
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private readonly List<WaitingObject> _waitingObjects;
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private AutoResetEvent _waitEvent;
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private bool _keepRunning;
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private long _enforceWakeupFromSpinWait;
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public KTimeManager(KernelContext context)
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{
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@ -41,11 +44,16 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
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public void ScheduleFutureInvocation(IKFutureSchedulerObject schedulerObj, long timeout)
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{
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long timePoint = PerformanceCounter.ElapsedMilliseconds + ConvertNanosecondsToMilliseconds(timeout);
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long timePoint = PerformanceCounter.ElapsedTicks + ConvertNanosecondsToHostTicks(timeout);
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lock (_context.CriticalSection.Lock)
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{
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_waitingObjects.Add(new WaitingObject(schedulerObj, timePoint));
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if (timeout < 1000000)
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{
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Interlocked.Exchange(ref _enforceWakeupFromSpinWait, 1);
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}
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}
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_waitEvent.Set();
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@ -61,27 +69,51 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
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private void WaitAndCheckScheduledObjects()
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{
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SpinWait spinWait = new SpinWait();
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WaitingObject next;
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using (_waitEvent = new AutoResetEvent(false))
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{
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while (_keepRunning)
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{
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WaitingObject next;
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lock (_context.CriticalSection.Lock)
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{
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Interlocked.Exchange(ref _enforceWakeupFromSpinWait, 0);
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next = _waitingObjects.OrderBy(x => x.TimePoint).FirstOrDefault();
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}
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if (next != null)
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{
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long timePoint = PerformanceCounter.ElapsedMilliseconds;
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long timePoint = PerformanceCounter.ElapsedTicks;
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if (next.TimePoint > timePoint)
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{
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_waitEvent.WaitOne((int)(next.TimePoint - timePoint));
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long ms = Math.Min((next.TimePoint - timePoint) / PerformanceCounter.TicksPerMillisecond, int.MaxValue);
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if (ms > 0)
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{
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_waitEvent.WaitOne((int)ms);
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}
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else
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{
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while (Interlocked.Read(ref _enforceWakeupFromSpinWait) != 1 && PerformanceCounter.ElapsedTicks <= next.TimePoint)
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{
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if (spinWait.NextSpinWillYield)
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{
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Thread.Yield();
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spinWait.Reset();
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}
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spinWait.SpinOnce();
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}
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spinWait.Reset();
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}
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}
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bool timeUp = PerformanceCounter.ElapsedMilliseconds >= next.TimePoint;
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bool timeUp = PerformanceCounter.ElapsedTicks >= next.TimePoint;
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if (timeUp)
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{
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@ -119,6 +151,22 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
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return time * 1000000;
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}
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public static long ConvertNanosecondsToHostTicks(long ns)
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{
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long nsDiv = ns / 1000000000;
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long nsMod = ns % 1000000000;
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long tickDiv = PerformanceCounter.TicksPerSecond / 1000000000;
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long tickMod = PerformanceCounter.TicksPerSecond % 1000000000;
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long baseTicks = (nsMod * tickMod + PerformanceCounter.TicksPerSecond - 1) / 1000000000;
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return (nsDiv * tickDiv) * 1000000000 + nsDiv * tickMod + nsMod * tickDiv + baseTicks;
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}
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public static long ConvertGuestTicksToNanoseconds(long ticks)
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{
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return (long)Math.Ceiling(ticks * (1000000000.0 / 19200000.0));
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}
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public static long ConvertHostTicksToTicks(long time)
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{
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return (long)((time / (double)PerformanceCounter.TicksPerSecond) * 19200000.0);
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@ -506,6 +506,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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return KernelResult.UserCopyFailed;
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}
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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return ReplyAndReceive(handles, replyTargetHandle, timeout, out handleIndex);
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}
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@ -547,6 +552,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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if (result == KernelResult.Success)
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{
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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while ((result = _context.Synchronization.WaitFor(syncObjs, timeout, out handleIndex)) == KernelResult.Success)
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{
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KServerSession session = currentProcess.HandleTable.GetObject<KServerSession>(handles[handleIndex]);
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@ -644,6 +654,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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if (result == KernelResult.Success)
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{
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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while ((result = _context.Synchronization.WaitFor(syncObjs, timeout, out handleIndex)) == KernelResult.Success)
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{
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KServerSession session = currentProcess.HandleTable.GetObject<KServerSession>(handles[handleIndex]);
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@ -2117,7 +2132,7 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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}
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else
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{
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KernelStatic.GetCurrentThread().Sleep(timeout);
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KernelStatic.GetCurrentThread().Sleep(timeout + KTimeManager.DefaultTimeIncrementNanoseconds);
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}
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}
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@ -2458,6 +2473,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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}
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}
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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KernelResult result = _context.Synchronization.WaitFor(syncObjs, timeout, out handleIndex);
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if (result == KernelResult.PortRemoteClosed)
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@ -2541,6 +2561,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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KProcess currentProcess = KernelStatic.GetCurrentProcess();
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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return currentProcess.AddressArbiter.WaitProcessWideKeyAtomic(
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mutexAddress,
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condVarAddress,
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@ -2571,6 +2596,11 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
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KProcess currentProcess = KernelStatic.GetCurrentProcess();
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if (timeout > 0)
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{
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timeout += KTimeManager.DefaultTimeIncrementNanoseconds;
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}
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return type switch
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{
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ArbitrationType.WaitIfLessThan
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