[emulator] Improve emulator performance by optimizing memory access and reducing unnecessary overhead in kernel and CPU execution paths

src/SharpEmu.CLI/SharpEmu.CLI.csproj

@@ -24,9 +24,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <ImplicitUsings>enable</ImplicitUsings>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Version>0.0.1</Version>
-    <ServerGarbageCollection>true</ServerGarbageCollection>
-    <ConcurrentGarbageCollection>true</ConcurrentGarbageCollection>
-    <TieredPGO>true</TieredPGO>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)' == 'Release'">

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Imports.cs

@@ -161,7 +161,7 @@ public sealed partial class DirectExecutionBackend
 				*(ulong*)(xmmSlot + 8));
 		}
 		cpuContext[CpuRegister.Rsp] = (ulong)argPackPtr + 96uL;
-		if (importStubEntry.Kind == ImportStubKind.BootstrapBridge)
+		if (string.Equals(importStubEntry.Nid, RuntimeStubNids.BootstrapBridge, StringComparison.Ordinal))
 		{
 			NormalizeKernelDynlibDlsymArguments(cpuContext, out _, out _);
 			*(ulong*)argPackPtr = cpuContext[CpuRegister.Rdi];
@@ -245,13 +245,12 @@ public sealed partial class DirectExecutionBackend
 		bool flag4 = !string.IsNullOrWhiteSpace(_importFilter);
 		bool flag5 = false;
 		ExportedFunction? matchedExport = importStubEntry.Export;
-		var traceFlags = importStubEntry.TraceFlags;
 		bool periodicTrace = num <= 128 ||
 			(num >= 240 && num <= 400) ||
 			(num >= 900 && num <= 1300) ||
 			num % 100000 == 0L ||
-			((traceFlags & ImportStubTraceFlags.PeriodicEvery1000) != 0 && (num <= 256 || num % 1000 == 0L)) ||
-			((traceFlags & ImportStubTraceFlags.PeriodicEvery128) != 0 && (num <= 256 || num % 128 == 0)) ||
+			(importStubEntry.Nid == "tsvEmnenz48" && (num <= 256 || num % 1000 == 0L)) ||
+			(importStubEntry.Nid == "rTXw65xmLIA" && (num <= 256 || num % 128 == 0)) ||
 			flag ||
 			flag2 ||
 			flag3;
@@ -312,15 +311,15 @@ public sealed partial class DirectExecutionBackend
 				cpuContext[CpuRegister.Rsi],
 				cpuContext[CpuRegister.Rdx]);
 		}
-		if ((traceFlags & ImportStubTraceFlags.Memset) != 0 && num <= 256)
+		if (importStubEntry.Nid == "8zTFvBIAIN8" && num <= 256)
 		{
 			Console.Error.WriteLine($"[LOADER][TRACE] memset#{num}: dst=0x{cpuContext[CpuRegister.Rdi]:X16} val=0x{cpuContext[CpuRegister.Rsi] & 0xFF:X2} len=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
 		}
-		if ((traceFlags & ImportStubTraceFlags.CxaAtexit) != 0 && num <= 64)
+		if (importStubEntry.Nid == "tsvEmnenz48" && num <= 64)
 		{
 			Console.Error.WriteLine($"[LOADER][TRACE] __cxa_atexit#{num}: func=0x{cpuContext[CpuRegister.Rdi]:X16} arg=0x{cpuContext[CpuRegister.Rsi]:X16} dso=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
 		}
-		if ((traceFlags & ImportStubTraceFlags.RawArgs) != 0)
+		if (importStubEntry.Nid == "bzQExy189ZI" || importStubEntry.Nid == "8G2LB+A3rzg")
 		{
 			Console.Error.WriteLine($"[LOADER][TRACE] {importStubEntry.Nid}#{num}: rdi=0x{cpuContext[CpuRegister.Rdi]:X16} rsi=0x{cpuContext[CpuRegister.Rsi]:X16} rdx=0x{cpuContext[CpuRegister.Rdx]:X16} ret=0x{num7:X16}");
 		}
@@ -350,7 +349,7 @@ public sealed partial class DirectExecutionBackend
 				Console.Error.Flush();
 			}
 		}
-		if ((traceFlags & ImportStubTraceFlags.StackChkFail) != 0)
+		if (importStubEntry.Nid == "Ou3iL1abvng")
 		{
 			if (_logStackCheck)
 			{
@@ -382,7 +381,7 @@ public sealed partial class DirectExecutionBackend
 				ActiveGuestReturnSlotAddress);
 			try
 			{
-				if (importStubEntry.Kind == ImportStubKind.BootstrapBridge)
+				if (string.Equals(importStubEntry.Nid, RuntimeStubNids.BootstrapBridge, StringComparison.Ordinal))
 				{
 					if (_logBootstrap)
 					{
@@ -391,11 +390,12 @@ public sealed partial class DirectExecutionBackend
 
 					orbisGen2Result = DispatchBootstrapBridge();
 				}
-				else if (importStubEntry.Kind == ImportStubKind.KernelDynlibDlsym)
+				else if (string.Equals(importStubEntry.Nid, RuntimeStubNids.KernelDynlibDlsym, StringComparison.Ordinal) ||
+					string.Equals(importStubEntry.Nid, "LwG8g3niqwA", StringComparison.Ordinal))
 				{
 					orbisGen2Result = DispatchKernelDynlibDlsym();
 				}
-				else if (importStubEntry.Kind == ImportStubKind.Il2CppApiLookupSymbol)
+				else if (string.Equals(importStubEntry.Nid, "r8mvOaWdi28", StringComparison.Ordinal))
 				{
 					orbisGen2Result = DispatchIl2CppApiLookupSymbol();
 				}
@@ -736,9 +736,6 @@ public sealed partial class DirectExecutionBackend
 		var expectedEqueueTimeout =
 			string.Equals(nid, "fzyMKs9kim0", StringComparison.Ordinal) &&
 			result == OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT;
-		var expectedEventFlagTimeout =
-			string.Equals(nid, "JTvBflhYazQ", StringComparison.Ordinal) &&
-			result == OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT;
 		var expectedMutexTrylockBusy =
 			string.Equals(nid, "K-jXhbt2gn4", StringComparison.Ordinal) &&
 			result == OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY;
@@ -751,7 +748,6 @@ public sealed partial class DirectExecutionBackend
 		if (!expectedFileProbeMiss &&
 			!expectedTimedWaitTimeout &&
 			!expectedEqueueTimeout &&
-			!expectedEventFlagTimeout &&
 			!expectedMutexTrylockBusy &&
 			!expectedUserServiceNoEvent &&
 			!expectedPrivacyInvalidParameter)
@@ -822,7 +818,6 @@ public sealed partial class DirectExecutionBackend
 			"2Z+PpY6CaJg" or // pthread_mutex_unlock
 			"EgmLo6EWgso" or // pthread_rwlock_unlock
 			"+L98PIbGttk" or // scePthreadRwlockUnlock
-			"q1cHNfGycLI" or // scePadRead
 			"8aI7R7WaOlc" or // sceAmprCommandBufferConstructor
 			"zgXifHT9ErY" or // sceVideoOutIsFlipPending
 			"V++UgBtQhn0" or // sceAgcGetDataPacketPayloadAddress
@@ -1081,15 +1076,9 @@ public sealed partial class DirectExecutionBackend
 	}
 
 	private static bool IsImportLoopGuardBoundary(string nid) =>
-    nid switch
-    {
-        "1jfXLRVzisc" => true, // sceKernelUsleep
-        "QcteRwbsnV0" => true, // usleep
-        "n88vx3C5nW8" => true, // gettimeofday
-        "Zxa0VhQVTsk" => true, // sceKernelWaitSema
-        "T72hz6ffq08" => true, // scePthreadYield
-        _ => false
-    };
+		string.Equals(nid, "1jfXLRVzisc", StringComparison.Ordinal) ||
+		string.Equals(nid, "Zxa0VhQVTsk", StringComparison.Ordinal) ||
+		string.Equals(nid, "T72hz6ffq08", StringComparison.Ordinal);
 
 	private void ResetImportLoopPattern()
 	{

src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.cs

@@ -25,26 +25,6 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 
 	private const int DefaultImportLoopGuardSeconds = 5;
 
-	private enum ImportStubKind : byte
-	{
-		Normal = 0,
-		BootstrapBridge = 1,
-		KernelDynlibDlsym = 2,
-		Il2CppApiLookupSymbol = 3,
-	}
-
-	[Flags]
-	private enum ImportStubTraceFlags : byte
-	{
-		None = 0,
-		Memset = 1 << 0,
-		CxaAtexit = 1 << 1,
-		RawArgs = 1 << 2,
-		StackChkFail = 1 << 3,
-		PeriodicEvery1000 = 1 << 4,
-		PeriodicEvery128 = 1 << 5,
-	}
-
 	private readonly struct ImportStubEntry
 	{
 		public ulong Address { get; }
@@ -53,36 +33,12 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 
 		public ExportedFunction? Export { get; }
 
-		public ImportStubKind Kind { get; }
-
-		public ImportStubTraceFlags TraceFlags { get; }
-
 		public ImportStubEntry(ulong address, string nid, ExportedFunction? export)
 		{
 			Address = address;
 			Nid = nid;
 			Export = export;
-			Kind = ClassifyKind(nid);
-			TraceFlags = ClassifyTraceFlags(nid);
 		}
-
-		private static ImportStubKind ClassifyKind(string nid) => nid switch
-		{
-			RuntimeStubNids.BootstrapBridge => ImportStubKind.BootstrapBridge,
-			RuntimeStubNids.KernelDynlibDlsym or "LwG8g3niqwA" => ImportStubKind.KernelDynlibDlsym,
-			"r8mvOaWdi28" => ImportStubKind.Il2CppApiLookupSymbol,
-			_ => ImportStubKind.Normal,
-		};
-
-		private static ImportStubTraceFlags ClassifyTraceFlags(string nid) => nid switch
-		{
-			"8zTFvBIAIN8" => ImportStubTraceFlags.Memset,
-			"tsvEmnenz48" => ImportStubTraceFlags.CxaAtexit | ImportStubTraceFlags.PeriodicEvery1000,
-			"bzQExy189ZI" or "8G2LB+A3rzg" => ImportStubTraceFlags.RawArgs,
-			"Ou3iL1abvng" => ImportStubTraceFlags.StackChkFail,
-			"rTXw65xmLIA" => ImportStubTraceFlags.PeriodicEvery128,
-			_ => ImportStubTraceFlags.None,
-		};
 	}
 
 	private readonly record struct RecentImportTraceEntry(
@@ -169,8 +125,6 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 
 	private const ulong GuestThreadRegionStride = 0x0100_0000UL;
 
-	private const int GuestThreadRegionSlotCount = 256;
-
 	private const uint PAGE_EXECUTE_READWRITE = 64u;
 
 	private const uint PAGE_READWRITE = 4u;
@@ -2803,21 +2757,7 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 			if (hostThread is not null &&
 				!ReferenceEquals(hostThread, Thread.CurrentThread))
 			{
-				// The handle is published before the host thread starts.
-				if ((hostThread.ThreadState & System.Threading.ThreadState.Unstarted) != 0)
-				{
-					Thread.Sleep(1);
-					continue;
-				}
-
-				try
-				{
-					hostThread.Join(1);
-				}
-				catch (ThreadStateException)
-				{
-					Thread.Sleep(1);
-				}
+				hostThread.Join(1);
 			}
 			else
 			{
@@ -3506,7 +3446,7 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 		out ulong mappedBase,
 		out string? error)
 	{
-		for (int i = 0; i < GuestThreadRegionSlotCount; i++)
+		for (int i = 0; i < 64; i++)
 		{
 			var candidateBase = baseAddress - ((ulong)i * GuestThreadRegionStride);
 			if (!IsGuestThreadRegionFree(virtualMemory, candidateBase, size))
@@ -3540,7 +3480,7 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
 		out ulong tlsBase,
 		out string? error)
 	{
-		for (int i = 0; i < GuestThreadRegionSlotCount; i++)
+		for (int i = 0; i < 64; i++)
 		{
 			var candidateBase = GuestThreadTlsBaseAddress - ((ulong)i * GuestThreadRegionStride);
 			var mappedBase = candidateBase - GuestThreadTlsPrefixSize;

src/SharpEmu.GUI/MainWindow.axaml.cs

@@ -25,7 +25,6 @@ namespace SharpEmu.GUI;
 public partial class MainWindow : Window
 {
     private const int MaxConsoleLines = 4000;
-    private const int MaxConsoleLinesPerFlush = 500;
 
     private static readonly IBrush DefaultLineBrush = new SolidColorBrush(Color.Parse("#C7CFDE"));
     private static readonly IBrush DimLineBrush = new SolidColorBrush(Color.Parse("#6B7488"));
@@ -1505,8 +1504,7 @@ public partial class MainWindow : Window
         }
 
         var incoming = new List<LogLine>();
-        while (incoming.Count < MaxConsoleLinesPerFlush &&
-               _pendingLines.TryDequeue(out var pending))
+        while (_pendingLines.TryDequeue(out var pending))
         {
             WriteFileLog(pending.Line);
             incoming.Add(new LogLine(pending.Line, BrushForLine(pending.Line)));

src/SharpEmu.Libs/Agc/AgcExports.cs

@@ -120,9 +120,6 @@ public static class AgcExports
     private const uint RegisterDefaultsVersion13 = 13;
     private const int RegisterDefaultsSize = 0x40;
     private const int RegisterDefaultBlockSize = 16 * 8;
-    private const ulong ResourceRegistrationBytesPerResource = 0x118;
-    private const ulong ResourceRegistrationBytesPerOwner = 0x1E0;
-    private const int ResourceRegistrationMaxNameLength = 256;
 
     private const ulong ShaderUserDataOffset = 0x08;
     private const ulong ShaderCodeOffset = 0x10;
@@ -391,26 +388,9 @@ public static class AgcExports
         public SubmittedDcbState Graphics { get; } = new();
         public Dictionary<uint, SubmittedDcbState> ComputeQueues { get; } = new();
         public Dictionary<ulong, ComputeImageWriter> ComputeImageWriters { get; } = new();
-        public Dictionary<uint, string> ResourceOwners { get; } = new();
-        public Dictionary<uint, RegisteredAgcResource> RegisteredResources { get; } = new();
-        public bool ResourceRegistrationInitialized { get; set; }
-        public ulong ResourceRegistrationMemory { get; set; }
-        public ulong ResourceRegistrationMemorySize { get; set; }
-        public uint ResourceRegistrationMaxOwners { get; set; }
-        public uint DefaultOwner { get; set; } = DefaultAgcOwner;
-        public uint NextOwner { get; set; } = 1;
-        public uint NextResource { get; set; } = 1;
         public ulong WorkSequence { get; set; }
     }
 
-    private readonly record struct RegisteredAgcResource(
-        uint Owner,
-        ulong Address,
-        ulong Size,
-        string Name,
-        uint Type,
-        uint Flags);
-
     private readonly record struct RegisterDefaultValue(uint Offset, uint Value);
 
     private readonly record struct RegisterDefaultGroup(
@@ -2140,87 +2120,12 @@ public static class AgcExports
             return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
         }
 
-        if (!ctx.TryWriteUInt32(outAddress, ResourceRegistrationMaxNameLength))
+        if (!ctx.TryWriteUInt32(outAddress, 256))
         {
             return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
         }
 
-        TraceAgc(
-            $"agc.driver_get_resource_registration_max_name_length " +
-            $"out=0x{outAddress:X16} value={ResourceRegistrationMaxNameLength}");
-        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
-    }
-
-    [SysAbiExport(
-        Nid = "AOLcoIkQDgM",
-        ExportName = "sceAgcDriverQueryResourceRegistrationUserMemoryRequirements",
-        Target = Generation.Gen5,
-        LibraryName = "libSceAgc")]
-    public static int DriverQueryResourceRegistrationUserMemoryRequirements(CpuContext ctx)
-    {
-        var sizeAddress = ctx[CpuRegister.Rdi];
-        var resourceCount = ctx[CpuRegister.Rsi];
-        var ownerCount = ctx[CpuRegister.Rdx];
-        if (sizeAddress == 0 || resourceCount == 0 || ownerCount == 0)
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        ulong requiredSize;
-        try
-        {
-            requiredSize = checked(
-                resourceCount * ResourceRegistrationBytesPerResource +
-                ownerCount * ResourceRegistrationBytesPerOwner);
-        }
-        catch (OverflowException)
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        if (!ctx.TryWriteUInt64(sizeAddress, requiredSize))
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-        }
-
-        TraceAgc(
-            $"agc.driver_query_resource_registration_memory resources={resourceCount} " +
-            $"owners={ownerCount} bytes=0x{requiredSize:X}");
-        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
-    }
-
-    [SysAbiExport(
-        Nid = "F0Y42t-3e18",
-        ExportName = "sceAgcDriverInitResourceRegistration",
-        Target = Generation.Gen5,
-        LibraryName = "libSceAgc")]
-    public static int DriverInitResourceRegistration(CpuContext ctx)
-    {
-        var memoryAddress = ctx[CpuRegister.Rdi];
-        var memorySize = ctx[CpuRegister.Rsi];
-        var ownerCount = ctx[CpuRegister.Rdx];
-        if (memoryAddress == 0 || memorySize == 0 || ownerCount == 0 || ownerCount > uint.MaxValue)
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        lock (state.Gate)
-        {
-            state.ResourceRegistrationInitialized = true;
-            state.ResourceRegistrationMemory = memoryAddress;
-            state.ResourceRegistrationMemorySize = memorySize;
-            state.ResourceRegistrationMaxOwners = (uint)ownerCount;
-            state.ResourceOwners.Clear();
-            state.RegisteredResources.Clear();
-            state.DefaultOwner = DefaultAgcOwner;
-            state.NextOwner = 1;
-            state.NextResource = 1;
-        }
-
-        TraceAgc(
-            $"agc.driver_init_resource_registration memory=0x{memoryAddress:X16} " +
-            $"bytes=0x{memorySize:X} owners={ownerCount}");
+        TraceAgc($"agc.driver_get_resource_registration_max_name_length out=0x{outAddress:X16} value=256");
         return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
     }
 
@@ -2239,97 +2144,12 @@ public static class AgcExports
             return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
         }
 
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        uint owner;
-        lock (state.Gate)
-        {
-            owner = state.DefaultOwner;
-        }
-
-        if (!ctx.TryWriteUInt32(ownerAddress, owner))
+        if (!ctx.TryWriteUInt32(ownerAddress, DefaultAgcOwner))
         {
             return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
         }
 
-        TraceAgc($"agc.driver_get_default_owner out=0x{ownerAddress:X16} owner={owner}");
-        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
-    }
-
-    [SysAbiExport(
-        Nid = "U9ueyEhSkF4",
-        ExportName = "sceAgcDriverRegisterDefaultOwner",
-        Target = Generation.Gen5,
-        LibraryName = "libSceAgc")]
-    public static int DriverRegisterDefaultOwner(CpuContext ctx)
-    {
-        var owner = (uint)ctx[CpuRegister.Rdi];
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        lock (state.Gate)
-        {
-            state.DefaultOwner = owner;
-        }
-
-        TraceAgc($"agc.driver_register_default_owner owner={owner}");
-        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
-    }
-
-    [SysAbiExport(
-        Nid = "X-Nm5KLREeg",
-        ExportName = "sceAgcDriverRegisterOwner",
-        Target = Generation.Gen5,
-        LibraryName = "libSceAgc")]
-    public static int DriverRegisterOwner(CpuContext ctx)
-    {
-        var ownerAddress = ctx[CpuRegister.Rdi];
-        var nameAddress = ctx[CpuRegister.Rsi];
-        if (ownerAddress == 0 || nameAddress == 0 ||
-            !TryReadGuestCString(
-                ctx,
-                nameAddress,
-                ResourceRegistrationMaxNameLength,
-                out var nameBytes))
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        uint owner;
-        lock (state.Gate)
-        {
-            if (!state.ResourceRegistrationInitialized ||
-                state.ResourceRegistrationMaxOwners != 0 &&
-                state.ResourceOwners.Count >= state.ResourceRegistrationMaxOwners)
-            {
-                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-            }
-
-            owner = state.NextOwner;
-            while (owner == state.DefaultOwner || state.ResourceOwners.ContainsKey(owner))
-            {
-                owner++;
-                if (owner == 0)
-                {
-                    return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-                }
-            }
-
-            state.NextOwner = owner + 1;
-            state.ResourceOwners.Add(owner, System.Text.Encoding.UTF8.GetString(nameBytes));
-        }
-
-        if (!ctx.TryWriteUInt32(ownerAddress, owner))
-        {
-            lock (state.Gate)
-            {
-                state.ResourceOwners.Remove(owner);
-            }
-
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-        }
-
-        TraceAgc(
-            $"agc.driver_register_owner out=0x{ownerAddress:X16} owner={owner} " +
-            $"name={System.Text.Encoding.UTF8.GetString(nameBytes)}");
+        TraceAgc($"agc.driver_get_default_owner out=0x{ownerAddress:X16} owner={DefaultAgcOwner}");
         return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
     }
 
@@ -2340,90 +2160,19 @@ public static class AgcExports
     LibraryName = "libSceAgc")]
     public static int DriverRegisterResource(CpuContext ctx)
     {
-        var resourceHandleAddress = ctx[CpuRegister.Rdi];
+        var resourceAddress = ctx[CpuRegister.Rdi];
         var owner = (uint)ctx[CpuRegister.Rsi];
-        var resourceAddress = ctx[CpuRegister.Rdx];
-        var resourceSize = ctx[CpuRegister.Rcx];
-        var nameAddress = ctx[CpuRegister.R8];
-        var type = (uint)ctx[CpuRegister.R9];
-        if (resourceHandleAddress == 0 || resourceAddress == 0 || resourceSize == 0 ||
-            !ctx.TryReadUInt32(ctx[CpuRegister.Rsp] + sizeof(ulong), out var flags) ||
-            !TryReadGuestCString(
-                ctx,
-                nameAddress,
-                ResourceRegistrationMaxNameLength,
-                out var nameBytes))
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        uint resourceHandle;
-        lock (state.Gate)
-        {
-            if (!state.ResourceRegistrationInitialized ||
-                owner != state.DefaultOwner &&
-                !state.ResourceOwners.ContainsKey(owner))
-            {
-                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-            }
-
-            resourceHandle = state.NextResource++;
-            if (resourceHandle == 0)
-            {
-                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-            }
-
-            state.RegisteredResources.Add(
-                resourceHandle,
-                new RegisteredAgcResource(
-                    owner,
-                    resourceAddress,
-                    resourceSize,
-                    System.Text.Encoding.UTF8.GetString(nameBytes),
-                    type,
-                    flags));
-        }
-
-        if (!ctx.TryWriteUInt32(resourceHandleAddress, resourceHandle))
-        {
-            lock (state.Gate)
-            {
-                state.RegisteredResources.Remove(resourceHandle);
-            }
-
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-        }
+        var nameAddress = ctx[CpuRegister.Rdx];
+        var type = (uint)ctx[CpuRegister.R8];
+        var flags = (uint)ctx[CpuRegister.R9];
 
         TraceAgc(
-            $"agc.driver_register_resource handle={resourceHandle} owner={owner} " +
-            $"resource=0x{resourceAddress:X16} bytes=0x{resourceSize:X} " +
-            $"name={System.Text.Encoding.UTF8.GetString(nameBytes)} type={type} flags={flags}");
+            $"agc.driver_register_resource resource=0x{resourceAddress:X16} owner={owner} " +
+            $"name=0x{nameAddress:X16} type={type} flags={flags}");
 
         return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
     }
 
-    [SysAbiExport(
-        Nid = "pWLG7WOpVcw",
-        ExportName = "sceAgcDriverUnregisterResource",
-        Target = Generation.Gen5,
-        LibraryName = "libSceAgc")]
-    public static int DriverUnregisterResource(CpuContext ctx)
-    {
-        var resourceHandle = (uint)ctx[CpuRegister.Rdi];
-        var state = _submittedGpuStates.GetValue(ctx.Memory, static _ => new SubmittedGpuState());
-        lock (state.Gate)
-        {
-            if (!state.RegisteredResources.Remove(resourceHandle))
-            {
-                return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-            }
-        }
-
-        TraceAgc($"agc.driver_unregister_resource handle={resourceHandle}");
-        return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK);
-    }
-
     [SysAbiExport(
     Nid = "-KRzWekV120",
     ExportName = "sceAgcDriverUnknown_KRzWekV120",
@@ -4501,7 +4250,7 @@ public static class AgcExports
         var localSizeZ = GetComputeLocalSize(state.ShRegisters, ComputeNumThreadZ);
         var gpuDispatch = false;
         var computeError = string.Empty;
-        if ((hasStorageBinding || evaluation.GlobalMemoryBindings.Count != 0) &&
+        if (hasStorageBinding &&
             (ulong)localSizeX * localSizeY * localSizeZ <= 1024)
         {
             var shaderKey = (
@@ -4571,8 +4320,7 @@ public static class AgcExports
                     $"groups={dispatch.GroupCountX}x{dispatch.GroupCountY}x{dispatch.GroupCountZ} " +
                     $"local={localSizeX}x{localSizeY}x{localSizeZ} " +
                     $"sys={DescribeComputeSystemRegisters(computeSystemRegisters)} " +
-                    $"gpu={gpuDispatch} blits={blitCount} " +
-                    $"globals={evaluation.GlobalMemoryBindings.Count}" +
+                    $"gpu={gpuDispatch} blits={blitCount}" +
                     (computeError.Length == 0 ? string.Empty : $" error={computeError}") +
                     $" bindings=[{string.Join(',', descriptions)}]");
             }

src/SharpEmu.Libs/Ajm/AjmExports.cs

@@ -1,37 +0,0 @@
-// Copyright (C) 2026 SharpEmu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-using SharpEmu.HLE;
-
-namespace SharpEmu.Libs.Ajm;
-
-public static class AjmExports
-{
-    private const int OrbisAjmErrorInvalidParameter = unchecked((int)0x80930005);
-    private static int _nextContextId;
-
-    [SysAbiExport(
-        Nid = "dl+4eHSzUu4",
-        ExportName = "sceAjmInitialize",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceAjm")]
-    public static int Initialize(CpuContext ctx)
-    {
-        var reserved = ctx[CpuRegister.Rdi];
-        var outContextAddress = ctx[CpuRegister.Rsi];
-
-        // AJM requires a zero reserved argument.
-        if (reserved != 0 || outContextAddress == 0)
-        {
-            return ctx.SetReturn(OrbisAjmErrorInvalidParameter);
-        }
-
-        var contextId = unchecked((uint)Interlocked.Increment(ref _nextContextId));
-        if (!ctx.TryWriteUInt32(outContextAddress, contextId))
-        {
-            return ctx.SetReturn(OrbisAjmErrorInvalidParameter);
-        }
-
-        return ctx.SetReturn(0);
-    }
-}

src/SharpEmu.Libs/Audio/AudioOut2Exports.cs

@@ -202,7 +202,7 @@ public static class AudioOut2Exports
     {
         var userId = unchecked((int)ctx[CpuRegister.Rdi]);
         var outUserAddress = ctx[CpuRegister.Rsi];
-        if ((userId != 0 && userId != 1 && userId != 1000 && userId != 255) || outUserAddress == 0)
+        if ((userId != 0 && userId != 1 && userId != 255) || outUserAddress == 0)
         {
             return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
         }

src/SharpEmu.Libs/HostTimerResolution.cs

@@ -1,46 +0,0 @@
-// Copyright (C) 2026 SharpEmu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-using System.Runtime.InteropServices;
-using System.Runtime.Versioning;
-
-namespace SharpEmu.Libs;
-
-public static class HostTimerResolution
-{
-    private const uint TargetPeriodMilliseconds = 1;
-
-    private static int _requested;
-
-    public static void Request()
-    {
-        if (Interlocked.Exchange(ref _requested, 1) != 0)
-        {
-            return;
-        }
-
-        if (!OperatingSystem.IsWindows())
-        {
-            return;
-        }
-
-        try
-        {
-            if (TimeBeginPeriod(TargetPeriodMilliseconds) != 0)
-            {
-                Console.Error.WriteLine(
-                    "[LOADER][WARN] Host timer resolution request rejected; " +
-                    "timed waits keep the default ~15.6 ms granularity.");
-            }
-        }
-        catch (DllNotFoundException exception)
-        {
-            Console.Error.WriteLine(
-                $"[LOADER][WARN] Host timer resolution unavailable: {exception.Message}");
-        }
-    }
-
-    [SupportedOSPlatform("windows")]
-    [DllImport("winmm.dll", EntryPoint = "timeBeginPeriod", ExactSpelling = true)]
-    private static extern uint TimeBeginPeriod(uint uPeriod);
-}

src/SharpEmu.Libs/Json/JsonExports.cs

@@ -78,58 +78,6 @@ public static class JsonExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    [SysAbiExport(
-        Nid = "WSOuge5IsCg",
-        ExportName = "_ZN3sce4Json15InitParameter2C2Ev",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceJson2")]
-    public static int InitParameter2Constructor(CpuContext ctx)
-    {
-        var thisAddress = ctx[CpuRegister.Rdi];
-        TraceJson("InitParameter2.ctor", thisAddress, ctx[CpuRegister.Rsi]);
-        ctx[CpuRegister.Rax] = thisAddress;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
-
-    [SysAbiExport(
-        Nid = "I2QC8PYhJWY",
-        ExportName = "_ZN3sce4Json15InitParameter212setAllocatorERNS0_12MemAllocatorE",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceJson2")]
-    public static int InitParameter2SetAllocator(CpuContext ctx)
-    {
-        var thisAddress = ctx[CpuRegister.Rdi];
-        TraceJson("InitParameter2.setAllocator", thisAddress, ctx[CpuRegister.Rsi]);
-        ctx[CpuRegister.Rax] = thisAddress;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
-
-    [SysAbiExport(
-        Nid = "Eu95jmqn5Rw",
-        ExportName = "_ZN3sce4Json15InitParameter217setFileBufferSizeEm",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceJson2")]
-    public static int InitParameter2SetFileBufferSize(CpuContext ctx)
-    {
-        var thisAddress = ctx[CpuRegister.Rdi];
-        TraceJson("InitParameter2.setFileBufferSize", thisAddress, ctx[CpuRegister.Rsi]);
-        ctx[CpuRegister.Rax] = thisAddress;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
-
-    [SysAbiExport(
-        Nid = "IXW-z8pggfg",
-        ExportName = "_ZN3sce4Json12Initializer2C1Ev",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceJson2")]
-    public static int Initializer2Constructor(CpuContext ctx)
-    {
-        var thisAddress = ctx[CpuRegister.Rdi];
-        TraceJson("Initializer2.ctor", thisAddress, ctx[CpuRegister.Rsi]);
-        ctx[CpuRegister.Rax] = thisAddress;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
-    }
-
     private static void TraceJson(string operation, ulong thisAddress, ulong argument)
     {
         if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_JSON"), "1", StringComparison.Ordinal))

src/SharpEmu.Libs/Kernel/KernelAprCompatExports.cs

@@ -80,8 +80,14 @@ public static class KernelAprCompatExports
             return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
         }
 
-        // Completion output was written when the command was submitted.
-        TraceApr(ctx, "wait", submissionId, submission.CommandBuffer, waitArg1, waitArg2);
+        var resultAddress = ResolveWaitResultAddress(waitArg1, waitArg2, submission.ResultAddress);
+        if (resultAddress != 0 && !TryWriteAprResult(ctx, resultAddress))
+        {
+            TraceAprWaitFailure(ctx, "wait_result_fault", submissionId, submission.CommandBuffer, waitArg1, waitArg2);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        TraceApr(ctx, "wait", submissionId, submission.CommandBuffer, waitArg1, resultAddress);
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
@@ -163,6 +169,27 @@ public static class KernelAprCompatExports
         return ctx.Memory.TryWrite(resultAddress, result);
     }
 
+    private static ulong ResolveWaitResultAddress(ulong waitArg1, ulong waitArg2, ulong submittedResultAddress)
+    {
+        if (waitArg2 == 0)
+        {
+            return submittedResultAddress;
+        }
+
+        if (IsAmprCompletionToken(waitArg1) && waitArg2 <= 0xFFFF)
+        {
+            return submittedResultAddress;
+        }
+
+        return waitArg2;
+    }
+
+    private static bool IsAmprCompletionToken(ulong value)
+    {
+        var tag = value >> 56;
+        return tag is 0x0C or 0x10;
+    }
+
     private static void TraceApr(
         CpuContext ctx,
         string operation,

src/SharpEmu.Libs/Kernel/KernelEventQueueCompatExports.cs

@@ -11,7 +11,6 @@ public static class KernelEventQueueCompatExports
 {
     private const int KernelEventSize = 0x20;
     public const short KernelEventFilterGraphics = -14;
-    public const short KernelEventFilterUser = -11;
     public const short KernelEventFilterAmpr = -16;
     public const short KernelEventFilterAmprSystem = -17;
 
@@ -90,16 +89,8 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelAddUserEventEdge(CpuContext ctx)
     {
-        var handle = ctx[CpuRegister.Rdi];
-        var registered = RegisterEvent(
-            handle,
-            ctx[CpuRegister.Rsi],
-            KernelEventFilterUser,
-            0);
-        TraceEventQueue(ctx, "add_user_edge", handle);
-        return registered
-            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
-            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        TraceEventQueue(ctx, "add_user_edge", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -109,16 +100,8 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelAddUserEvent(CpuContext ctx)
     {
-        var handle = ctx[CpuRegister.Rdi];
-        var registered = RegisterEvent(
-            handle,
-            ctx[CpuRegister.Rsi],
-            KernelEventFilterUser,
-            0);
-        TraceEventQueue(ctx, "add_user", handle);
-        return registered
-            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
-            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        TraceEventQueue(ctx, "add_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -128,15 +111,8 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelDeleteUserEvent(CpuContext ctx)
     {
-        var handle = ctx[CpuRegister.Rdi];
-        var deleted = DeleteRegisteredEvent(
-            handle,
-            ctx[CpuRegister.Rsi],
-            KernelEventFilterUser);
-        TraceEventQueue(ctx, "delete_user", handle);
-        return deleted
-            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
-            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        TraceEventQueue(ctx, "delete_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -146,18 +122,8 @@ public static class KernelEventQueueCompatExports
         LibraryName = "libKernel")]
     public static int KernelTriggerUserEvent(CpuContext ctx)
     {
-        var handle = ctx[CpuRegister.Rdi];
-        var triggered = TriggerRegisteredEvent(
-            handle,
-            ctx[CpuRegister.Rsi],
-            KernelEventFilterUser,
-            flags: 0x21,
-            fflags: 0,
-            data: ctx[CpuRegister.Rdx]);
-        TraceEventQueue(ctx, "trigger_user", handle);
-        return triggered
-            ? (int)OrbisGen2Result.ORBIS_GEN2_OK
-            : (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+        TraceEventQueue(ctx, "trigger_user", ctx[CpuRegister.Rdi]);
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -509,43 +475,6 @@ public static class KernelEventQueueCompatExports
         return triggeredCount;
     }
 
-    private static bool TriggerRegisteredEvent(
-        ulong handle,
-        ulong ident,
-        short filter,
-        ushort flags,
-        uint fflags,
-        ulong data)
-    {
-        lock (_eventQueueGate)
-        {
-            if (!_registeredEvents.TryGetValue(handle, out var registrations) ||
-                !registrations.TryGetValue((ident, filter), out var registration))
-            {
-                return false;
-            }
-
-            if (!_pendingEvents.TryGetValue(handle, out var queue))
-            {
-                queue = new LinkedList<KernelQueuedEvent>();
-                _pendingEvents[handle] = queue;
-            }
-
-            QueueOrUpdateEvent(
-                queue,
-                new KernelQueuedEvent(
-                    registration.Ident,
-                    registration.Filter,
-                    flags,
-                    fflags,
-                    data,
-                    registration.UserData));
-        }
-
-        WakeEventQueue(handle);
-        return true;
-    }
-
     public static bool TriggerDisplayEvent(
         ulong handle,
         ulong ident,
@@ -727,6 +656,6 @@ public static class KernelEventQueueCompatExports
 
         _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out ulong returnRip);
         Console.Error.WriteLine(
-            $"[LOADER][TRACE] equeue.{operation}: thread=0x{KernelPthreadState.GetCurrentThreadHandle():X16} handle=0x{handle:X16} rsi=0x{ctx[CpuRegister.Rsi]:X16} rdx=0x{ctx[CpuRegister.Rdx]:X16} ret=0x{returnRip:X16}");
+            $"[LOADER][TRACE] equeue.{operation}: handle=0x{handle:X16} rsi=0x{ctx[CpuRegister.Rsi]:X16} rdx=0x{ctx[CpuRegister.Rdx]:X16} ret=0x{returnRip:X16}");
     }
 }

src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs

@@ -1683,30 +1683,6 @@ public static class KernelMemoryCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    [SysAbiExport(
-        Nid = "E6ao34wPw+U",
-        ExportName = "stat",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libKernel")]
-    public static int PosixStat(CpuContext ctx)
-    {
-        var result = KernelStat(ctx);
-        if (result == (int)OrbisGen2Result.ORBIS_GEN2_OK)
-        {
-            return 0;
-        }
-
-        var errno = result switch
-        {
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT => Einval,
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT => Efault,
-            _ => 2,
-        };
-        KernelRuntimeCompatExports.TrySetErrno(ctx, errno);
-        ctx[CpuRegister.Rax] = ulong.MaxValue;
-        return -1;
-    }
-
     [SysAbiExport(
         Nid = "gEpBkcwxUjw",
         ExportName = "sceKernelAprResolveFilepathsToIdsAndFileSizes",
@@ -3989,7 +3965,7 @@ public static class KernelMemoryCompatExports
                             _ => unchecked((int)argumentSource.NextGpArg())
                         };
 
-                        var formatted = value.ToString(CultureInfo.InvariantCulture);
+                        var formatted = value.ToString();
                         if (showSign && value >= 0)
                             formatted = "+" + formatted;
                         else if (spaceForSign && value >= 0)
@@ -4013,7 +3989,7 @@ public static class KernelMemoryCompatExports
                             _ => (uint)argumentSource.NextGpArg()
                         };
 
-                        var formatted = value.ToString(CultureInfo.InvariantCulture);
+                        var formatted = value.ToString();
                         sb.Append(PadString(formatted, width, leftAlign, padWithZero && !leftAlign));
                     }
                     break;
@@ -4034,8 +4010,8 @@ public static class KernelMemoryCompatExports
                         };
 
                         var formatted = specifier == 'x'
-                            ? value.ToString("x", CultureInfo.InvariantCulture)
-                            : value.ToString("X", CultureInfo.InvariantCulture);
+                            ? value.ToString("x")
+                            : value.ToString("X");
 
                         if (alternateForm && value != 0)
                             formatted = specifier == 'x' ? "0x" + formatted : "0X" + formatted;
@@ -4143,10 +4119,7 @@ public static class KernelMemoryCompatExports
                         var formatStr = precision >= 0
                             ? $"{{0:{specifier}{precision}}}"
                             : $"{{0:{specifier}}}";
-                        var formatted = string.Format(
-                            CultureInfo.InvariantCulture,
-                            formatStr,
-                            value);
+                        var formatted = string.Format(formatStr, value);
 
                         if (showSign && value >= 0)
                             formatted = "+" + formatted;

src/SharpEmu.Libs/Kernel/KernelPthreadCompatExports.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Concurrent;
 using SharpEmu.HLE;
-using SharpEmu.Libs.Fiber;
 using System.Diagnostics.CodeAnalysis;
 
 namespace SharpEmu.Libs.Kernel;
@@ -45,8 +44,6 @@ public static class KernelPthreadCompatExports
     // type initializer that first runs on a guest thread and fail-fasts the CLR.
     private static long _nextMutexWakeId;
     private static long _nextCondWakeId;
-    private static readonly ConcurrentDictionary<ulong, long> _posixTimedWaitCounts = new();
-    private static readonly ConcurrentDictionary<ulong, byte> _reportedContendedMutexes = new();
 
     private sealed class PthreadMutexState
     {
@@ -354,95 +351,29 @@ public static class KernelPthreadCompatExports
         LibraryName = "libKernel")]
     public static int PosixPthreadCondTimedwait(CpuContext ctx)
     {
-        var absoluteTimeAddress = ctx[CpuRegister.Rdx];
-        if (absoluteTimeAddress == 0 ||
-            !ctx.TryReadUInt64(absoluteTimeAddress, out var secondsRaw) ||
-            !ctx.TryReadUInt64(absoluteTimeAddress + sizeof(ulong), out var nanosecondsRaw))
+        // POSIX passes `const struct timespec *abstime` (absolute deadline), not relative microseconds (#113).
+        var abstimeAddress = ctx[CpuRegister.Rdx];
+        if (abstimeAddress == 0)
         {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
         }
 
-        var deadlineSeconds = unchecked((long)secondsRaw);
-        var deadlineNanoseconds = unchecked((long)nanosecondsRaw);
-        if (deadlineSeconds < 0 || deadlineNanoseconds is < 0 or >= 1_000_000_000)
+        if (!ctx.TryReadUInt64(abstimeAddress, out var deadlineSeconds) ||
+            !ctx.TryReadUInt64(abstimeAddress + 8, out var deadlineNanoseconds))
         {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
         }
 
-        long nowSeconds;
-        long nowNanoseconds;
-        if (deadlineSeconds >= 1_000_000_000)
-        {
-            var now = DateTimeOffset.UtcNow;
-            nowSeconds = now.ToUnixTimeSeconds();
-            nowNanoseconds = (now.Ticks % TimeSpan.TicksPerSecond) * 100;
-        }
-        else
-        {
-            // Engine condition variables use monotonic deadlines.
-            KernelRuntimeCompatExports.GetProcessMonotonicTime(out nowSeconds, out nowNanoseconds);
-        }
-
-        var remainingNanoseconds =
-            ((Int128)deadlineSeconds * 1_000_000_000 + deadlineNanoseconds) -
-            ((Int128)nowSeconds * 1_000_000_000 + nowNanoseconds);
-        var timeoutUsec = remainingNanoseconds <= 0
-            ? 0u
-            : (uint)Int128.Min(uint.MaxValue, (remainingNanoseconds + 999) / 1_000);
-
-        TracePosixTimedWait(
-            ctx,
-            deadlineSeconds,
-            deadlineNanoseconds,
-            nowSeconds,
-            nowNanoseconds,
-            remainingNanoseconds,
-            timeoutUsec);
-
-        return PthreadCondWaitCore(
-            ctx,
-            ctx[CpuRegister.Rdi],
-            ctx[CpuRegister.Rsi],
-            timed: true,
-            timeoutUsec,
-            posixResult: true);
-    }
-
-    private static void TracePosixTimedWait(
-        CpuContext ctx,
-        long deadlineSeconds,
-        long deadlineNanoseconds,
-        long nowSeconds,
-        long nowNanoseconds,
-        Int128 remainingNanoseconds,
-        uint timeoutUsec)
-    {
-        var condAddress = ctx[CpuRegister.Rdi];
-        var count = _posixTimedWaitCounts.AddOrUpdate(condAddress, 1, static (_, current) => current + 1);
-        if (count != 1 && count % 1_000_000 != 0)
-        {
-            return;
-        }
-
-        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out var returnRip);
-        Console.Error.WriteLine(
-            $"[LOADER][DIAG] pthread_cond_timedwait#{count}: thread=0x{KernelPthreadState.GetCurrentThreadHandle():X16} " +
-            $"cond=0x{condAddress:X16} mutex=0x{ctx[CpuRegister.Rsi]:X16} abstime=0x{ctx[CpuRegister.Rdx]:X16} " +
-            $"deadline={deadlineSeconds}.{deadlineNanoseconds:D9} now={nowSeconds}.{nowNanoseconds:D9} " +
-            $"remaining_ns={remainingNanoseconds} timeout_us={timeoutUsec} ret=0x{returnRip:X16}");
-
-        if (GuestThreadExecution.Scheduler is not { } scheduler)
-        {
-            return;
-        }
-
-        foreach (var snapshot in scheduler.SnapshotThreads())
-        {
-            Console.Error.WriteLine(
-                $"[LOADER][DIAG] guest_thread handle=0x{snapshot.ThreadHandle:X16} name='{snapshot.Name}' " +
-                $"state={snapshot.State} imports={snapshot.ImportCount} nid={snapshot.LastImportNid ?? "none"} " +
-                $"ret=0x{snapshot.LastReturnRip:X16} block={snapshot.BlockReason ?? "none"}");
-        }
+        var nowMicroseconds = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() * 1000L;
+        var deadlineMicroseconds =
+            deadlineSeconds >= long.MaxValue / 1_000_000UL
+                ? long.MaxValue
+                : (long)(deadlineSeconds * 1_000_000UL + Math.Min(deadlineNanoseconds, 999_999_999UL) / 1000UL);
+        var remainingMicroseconds = deadlineMicroseconds - nowMicroseconds;
+        var timeoutUsec = remainingMicroseconds <= 0
+            ? 1u
+            : (uint)Math.Min(remainingMicroseconds, uint.MaxValue);
+        return PthreadCondWaitCore(ctx, ctx[CpuRegister.Rdi], ctx[CpuRegister.Rsi], timed: true, timeoutUsec: timeoutUsec);
     }
 
     [SysAbiExport(
@@ -723,12 +654,11 @@ public static class KernelPthreadCompatExports
         var acquired = state.Semaphore.Wait(0);
         if (!acquired)
         {
-            TraceContendedMutex(ctx, mutexAddress, resolvedAddress, state, currentThreadId);
             var waiter = new PthreadMutexWaiter { ThreadId = currentThreadId };
-            // Fibers retain the synchronous fallback to preserve switch state.
-            var currentFiber = FiberExports.GetCurrentFiberAddressForDiagnostics(ctx);
-            var canCooperativelyBlock = _enableMutexLockBlocking || currentFiber == 0;
-            if (canCooperativelyBlock &&
+            // Cooperative deschedule on a contended lock corrupts fiber state
+            // (Demon's Souls sceFiberSwitch -> ESRCH). Off by default: fall through to the
+            // synchronous host-thread wait below.
+            if (_enableMutexLockBlocking &&
                 !tryOnly &&
                 GuestThreadExecution.IsGuestThread &&
                 GuestThreadExecution.TryGetCurrentImportCallFrame(out _) &&
@@ -767,53 +697,6 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    private static void TraceContendedMutex(
-        CpuContext ctx,
-        ulong mutexAddress,
-        ulong resolvedAddress,
-        PthreadMutexState state,
-        ulong currentThreadId)
-    {
-        if (!_reportedContendedMutexes.TryAdd(resolvedAddress, 0))
-        {
-            return;
-        }
-
-        ulong ownerThreadId;
-        int recursionCount;
-        int type;
-        lock (state)
-        {
-            ownerThreadId = state.OwnerThreadId;
-            recursionCount = state.RecursionCount;
-            type = state.Type;
-        }
-
-        _ = ctx.TryReadUInt64(ctx[CpuRegister.Rsp], out var returnRip);
-        Console.Error.WriteLine(
-            $"[LOADER][DIAG] pthread_mutex_contended: waiter=0x{currentThreadId:X16} owner=0x{ownerThreadId:X16} " +
-            $"mutex=0x{mutexAddress:X16} resolved=0x{resolvedAddress:X16} recursion={recursionCount} " +
-            $"type={type} semaphore_count={state.Semaphore.CurrentCount} ret=0x{returnRip:X16}");
-
-        if (GuestThreadExecution.Scheduler is not { } scheduler)
-        {
-            return;
-        }
-
-        foreach (var snapshot in scheduler.SnapshotThreads())
-        {
-            if (snapshot.ThreadHandle != currentThreadId && snapshot.ThreadHandle != ownerThreadId)
-            {
-                continue;
-            }
-
-            Console.Error.WriteLine(
-                $"[LOADER][DIAG] pthread_mutex_party handle=0x{snapshot.ThreadHandle:X16} name='{snapshot.Name}' " +
-                $"state={snapshot.State} imports={snapshot.ImportCount} nid={snapshot.LastImportNid ?? "none"} " +
-                $"ret=0x{snapshot.LastReturnRip:X16} block={snapshot.BlockReason ?? "none"}");
-        }
-    }
-
     private static int PthreadMutexUnlockCore(CpuContext ctx, ulong mutexAddress, bool requireOwner)
     {
         if (mutexAddress == 0)
@@ -1193,13 +1076,6 @@ public static class KernelPthreadCompatExports
 
         lock (_stateGate)
         {
-            if (_condStates.TryGetValue(condAddress, out var raced))
-            {
-                resolvedAddress = condAddress;
-                state = raced;
-                return true;
-            }
-
             _condStates[condAddress] = createdState;
             _condStates[handle] = createdState;
         }
@@ -1296,13 +1172,7 @@ public static class KernelPthreadCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    private static int PthreadCondWaitCore(
-        CpuContext ctx,
-        ulong condAddress,
-        ulong mutexAddress,
-        bool timed,
-        uint timeoutUsec = 0,
-        bool posixResult = false)
+    private static int PthreadCondWaitCore(CpuContext ctx, ulong condAddress, ulong mutexAddress, bool timed, uint timeoutUsec = 0)
     {
         if (condAddress == 0 || mutexAddress == 0)
         {
@@ -1340,10 +1210,9 @@ public static class KernelPthreadCompatExports
 
             if (consumedPendingSignal)
             {
+                // Leave SyncRoot before relocking the mutex to avoid lock-order inversion with cond-signal (#113).
                 state.Waiters = Math.Max(0, state.Waiters - 1);
                 TracePthreadCond("wait-wake-pending", condAddress, mutexAddress, state, timed, waitResult);
-
-                // Relock outside SyncRoot to preserve lock ordering.
                 Monitor.Exit(state.SyncRoot);
                 try
                 {
@@ -1352,7 +1221,6 @@ public static class KernelPthreadCompatExports
                 }
                 finally
                 {
-                    // Balance the surrounding lock statement.
                     Monitor.Enter(state.SyncRoot);
                 }
             }
@@ -1363,7 +1231,7 @@ public static class KernelPthreadCompatExports
                     ctx,
                     timed ? "pthread_cond_timedwait" : "pthread_cond_wait",
                     state.WakeKey,
-                    () => ResumePthreadCondWait(ctx, condAddress, mutexAddress, state, observedEpoch, timed, releasedRecursion, posixResult),
+                    () => ResumePthreadCondWait(ctx, condAddress, mutexAddress, state, observedEpoch, timed, releasedRecursion),
                     () => state.SignalEpoch != observedEpoch,
                     timed ? GuestThreadExecution.ComputeDeadlineTimestamp(GetCondWaitTimeout(timeoutUsec)) : 0))
             {
@@ -1447,7 +1315,7 @@ public static class KernelPthreadCompatExports
             state,
             timed,
             waitResult);
-        return TranslatePthreadResult(waitResult, posixResult);
+        return waitResult;
     }
 
     private static int PthreadCondSignalCore(CpuContext ctx, ulong condAddress, bool broadcast)
@@ -1504,8 +1372,7 @@ public static class KernelPthreadCompatExports
         PthreadCondState state,
         ulong observedEpoch,
         bool timed,
-        int releasedRecursion,
-        bool posixResult)
+        int releasedRecursion)
     {
         var waitResult = (int)OrbisGen2Result.ORBIS_GEN2_OK;
         lock (state.SyncRoot)
@@ -1526,32 +1393,7 @@ public static class KernelPthreadCompatExports
         }
 
         var lockResult = PthreadMutexRelockForCondWait(ctx, mutexAddress, releasedRecursion);
-        return TranslatePthreadResult(
-            lockResult == (int)OrbisGen2Result.ORBIS_GEN2_OK ? waitResult : lockResult,
-            posixResult);
-    }
-
-    private static int TranslatePthreadResult(int result, bool posixResult)
-    {
-        if (!posixResult || result == (int)OrbisGen2Result.ORBIS_GEN2_OK)
-        {
-            return result;
-        }
-
-        return result switch
-        {
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_PERMISSION_DENIED => 1, // EPERM
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND => 2,        // ENOENT
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT => 22, // EINVAL
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_DEADLOCK => 11,        // EDEADLK
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_DELETED => 13,         // EACCES
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_BUSY => 16,            // EBUSY
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_TRY_AGAIN => 35,       // EAGAIN
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_TIMED_OUT => 60,       // ETIMEDOUT
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_CANCELED => 85,        // ECANCELED
-            (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT => 14,    // EFAULT
-            _ => result
-        };
+        return lockResult == (int)OrbisGen2Result.ORBIS_GEN2_OK ? waitResult : lockResult;
     }
 
     private static string GetCondWakeKey(ulong resolvedCondAddress) =>
@@ -1717,10 +1559,7 @@ public static class KernelPthreadCompatExports
             return TimeSpan.Zero;
         }
 
-        // Round positive sub-millisecond waits to the host sleep quantum.
-        return timeoutUsec < 1_000
-            ? TimeSpan.FromMilliseconds(1)
-            : TimeSpan.FromTicks((long)timeoutUsec * 10L);
+        return TimeSpan.FromTicks((long)timeoutUsec * 10L);
     }
 
     private static TimeSpan GetCondSpuriousWakeTimeout()
@@ -1862,8 +1701,7 @@ public static class KernelPthreadCompatExports
         }
 
         Console.Error.WriteLine(
-            $"[LOADER][TRACE] pthread_cond_{operation}: thread=0x{KernelPthreadState.GetCurrentThreadHandle():X16} " +
-            $"cond=0x{condAddress:X16} key={state?.WakeKey ?? "none"} mutex=0x{mutexAddress:X16} " +
+            $"[LOADER][TRACE] pthread_cond_{operation}: cond=0x{condAddress:X16} mutex=0x{mutexAddress:X16} " +
             $"waiters={(state?.Waiters ?? 0)} epoch=0x{(state?.SignalEpoch ?? 0):X} timed={timed} result=0x{unchecked((uint)result):X8}");
     }
 

src/SharpEmu.Libs/Kernel/KernelRuntimeCompatExports.cs

@@ -213,13 +213,6 @@ public static class KernelRuntimeCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    [SysAbiExport(
-        Nid = "QcteRwbsnV0",
-        ExportName = "usleep",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libKernel")]
-    public static int PosixUsleep(CpuContext ctx) => KernelUsleep(ctx);
-
     private static void TraceUsleepSpin(CpuContext ctx, ulong micros)
     {
         if (!_traceUsleep)
@@ -431,18 +424,6 @@ public static class KernelRuntimeCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
-    [SysAbiExport(
-        Nid = "HoLVWNanBBc",
-        ExportName = "getpid",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libKernel")]
-    public static int GetProcessId(CpuContext ctx)
-    {
-        var processId = Environment.ProcessId;
-        ctx[CpuRegister.Rax] = unchecked((uint)processId);
-        return processId;
-    }
-
     [SysAbiExport(
         Nid = "fgxnMeTNUtY",
         ExportName = "sceKernelGetProcessTimeCounter",

src/SharpEmu.Libs/Np/NpManagerExports.cs

@@ -53,19 +53,8 @@ public static class NpManagerExports
         LibraryName = "libSceNpManager")]
     public static int NpGetOnlineId(CpuContext ctx)
     {
-        // Gen5 ABI: user ID, then output structure.
-        return WriteOfflineOnlineId(ctx, ctx[CpuRegister.Rsi]);
-    }
-
-    [SysAbiExport(
-        Nid = "rbknaUjpqWo",
-        ExportName = "sceNpGetOnlineIdA",
-        Target = Generation.Gen5,
-        LibraryName = "libSceNpManager")]
-    public static int NpGetOnlineIdA(CpuContext ctx)
-    {
-        // The A variant takes a user ID before OnlineId.
-        return WriteOfflineOnlineId(ctx, ctx[CpuRegister.Rsi]);
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
     [SysAbiExport(
@@ -180,19 +169,4 @@ public static class NpManagerExports
 
         Console.Error.WriteLine($"[LOADER][TRACE] np.{message}");
     }
-
-    private static int WriteOfflineOnlineId(CpuContext ctx, ulong address)
-    {
-        if (address == 0)
-        {
-            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
-        }
-
-        // SceNpOnlineId is a 16-byte handle plus four trailing bytes.
-        Span<byte> onlineId = stackalloc byte[20];
-        "Player"u8.CopyTo(onlineId);
-        return ctx.Memory.TryWrite(address, onlineId)
-            ? ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK)
-            : ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
-    }
 }

src/SharpEmu.Libs/Np/NpWebApi2Exports.cs

@@ -31,18 +31,6 @@ public static class NpWebApi2Exports
         return ctx.SetReturn(0);
     }
 
-    [SysAbiExport(
-        Nid = "WV1GwM32NgY",
-        ExportName = "sceNpWebApi2InitializeForToolkit",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceNpWebApi2")]
-    public static int NpWebApi2InitializeAlt(CpuContext ctx)
-    {
-        Interlocked.Exchange(ref _initialized, 1);
-        TraceNpWebApi2("init-alt", unchecked((int)ctx[CpuRegister.Rdi]), ctx[CpuRegister.Rsi]);
-        return ctx.SetReturn(0);
-    }
-
     [SysAbiExport(
         Nid = "bEvXpcEk200",
         ExportName = "sceNpWebApi2Terminate",

src/SharpEmu.Libs/Pad/PadExports.cs

@@ -14,18 +14,11 @@ public static class PadExports
     private const int OrbisPadErrorNotInitialized = unchecked((int)0x80920005);
     private const int OrbisPadErrorDeviceNotConnected = unchecked((int)0x80920007);
     private const int OrbisPadErrorDeviceNoHandle = unchecked((int)0x80920008);
-    private const int PrimaryUserId = 1000;
+    private const int PrimaryUserId = 1;
     private const int StandardPortType = 0;
     private const int PrimaryPadHandle = 1;
     private const int ControllerInformationSize = 0x1C;
     private const int PadDataSize = 0x78;
-    private static readonly long InputSampleIntervalTicks = Math.Max(1, Stopwatch.Frequency / 1000);
-
-    [ThreadStatic]
-    private static long _lastInputSampleTicks;
-
-    [ThreadStatic]
-    private static PadState _cachedInputState;
 
     private static bool _initialized;
 
@@ -277,44 +270,6 @@ public static class PadExports
     {
         Span<byte> data = stackalloc byte[PadDataSize];
         data.Clear();
-        var input = ReadHostInputState();
-        var buttons = input.Buttons;
-        var leftX = input.LeftX;
-        var leftY = input.LeftY;
-        var rightX = input.RightX;
-        var rightY = input.RightY;
-        var l2 = input.L2;
-        var r2 = input.R2;
-
-        BinaryPrimitives.WriteUInt32LittleEndian(data[0x00..], buttons);
-        data[0x04] = leftX;
-        data[0x05] = leftY;
-        data[0x06] = rightX;
-        data[0x07] = rightY;
-        data[0x08] = l2;
-        data[0x09] = r2;
-        BinaryPrimitives.WriteSingleLittleEndian(data[0x18..], 1.0f);
-        data[0x4C] = 1;
-        var timestampTicks = Stopwatch.GetTimestamp();
-        var timestampMicroseconds =
-            ((ulong)(timestampTicks / Stopwatch.Frequency) * 1_000_000UL) +
-            ((ulong)(timestampTicks % Stopwatch.Frequency) * 1_000_000UL / (ulong)Stopwatch.Frequency);
-        BinaryPrimitives.WriteUInt64LittleEndian(
-            data[0x50..],
-            timestampMicroseconds);
-        data[0x68] = 1;
-
-        return ctx.Memory.TryWrite(dataAddress, data);
-    }
-
-    private static PadState ReadHostInputState()
-    {
-        var now = Stopwatch.GetTimestamp();
-        if (_lastInputSampleTicks != 0 && now - _lastInputSampleTicks < InputSampleIntervalTicks)
-        {
-            return _cachedInputState;
-        }
-
         var acceptsKeyboardInput = IsEmulatorWindowFocused();
         var buttons = acceptsKeyboardInput ? ReadKeyboardButtons() : 0;
         var leftX = acceptsKeyboardInput ? ReadAnalogStick(IsKeyDown(0x41), IsKeyDown(0x44)) : (byte)128;
@@ -348,17 +303,25 @@ public static class PadExports
             r2 = Math.Max(r2, xpad.R2);
         }
 
-        _cachedInputState = new PadState(
-            Connected: true,
-            Buttons: buttons,
-            LeftX: leftX,
-            LeftY: leftY,
-            RightX: rightX,
-            RightY: rightY,
-            L2: l2,
-            R2: r2);
-        _lastInputSampleTicks = now;
-        return _cachedInputState;
+        BinaryPrimitives.WriteUInt32LittleEndian(data[0x00..], buttons);
+        data[0x04] = leftX;
+        data[0x05] = leftY;
+        data[0x06] = rightX;
+        data[0x07] = rightY;
+        data[0x08] = l2;
+        data[0x09] = r2;
+        BinaryPrimitives.WriteSingleLittleEndian(data[0x18..], 1.0f);
+        data[0x4C] = 1;
+        var timestampTicks = Stopwatch.GetTimestamp();
+        var timestampMicroseconds =
+            ((ulong)(timestampTicks / Stopwatch.Frequency) * 1_000_000UL) +
+            ((ulong)(timestampTicks % Stopwatch.Frequency) * 1_000_000UL / (ulong)Stopwatch.Frequency);
+        BinaryPrimitives.WriteUInt64LittleEndian(
+            data[0x50..],
+            timestampMicroseconds);
+        data[0x68] = 1;
+
+        return ctx.Memory.TryWrite(dataAddress, data);
     }
 
     [DllImport("user32.dll")]

src/SharpEmu.Libs/PlayGo/PlayGoExports.cs

@@ -682,9 +682,7 @@ public static class PlayGoExports
         var hasMetadata = File.Exists(playGoDat) || File.Exists(scenarioJson) || File.Exists(chunkDefsXml);
         if (!hasMetadata)
         {
-            // Full installs may omit PlayGo sidecar metadata.
-            TracePlayGo("metadata_missing; using fully-installed default chunk");
-            return new PlayGoMetadata(true, [(ushort)0]);
+            return PlayGoMetadata.Empty;
         }
 
         var chunkIds = LoadChunkIds(chunkDefsXml);

src/SharpEmu.Libs/SaveData/SaveDataExports.cs

@@ -30,17 +30,13 @@ public static class SaveDataExports
     private const uint MountModeCreate2 = 1u << 5;
     private const int MountResultSize = 0x40;
     private static readonly object _stateGate = new();
-    private static readonly HashSet<int> _transactionResources = [];
     private static string? _titleId;
-    private static int _nextTransactionResource;
 
     public static void ConfigureApplicationInfo(string? titleId)
     {
         lock (_stateGate)
         {
             _titleId = string.IsNullOrWhiteSpace(titleId) ? null : SanitizePathSegment(titleId.Trim());
-            _transactionResources.Clear();
-            _nextTransactionResource = 0;
         }
     }
 
@@ -248,6 +244,7 @@ public static class SaveDataExports
         }
     }
 
+    private static int _nextTransactionResource;
     [SysAbiExport(
         Nid = "gjRZNnw0JPE",
         ExportName = "sceSaveDataCreateTransactionResource",
@@ -255,32 +252,25 @@ public static class SaveDataExports
         LibraryName = "libSceSaveData")]
     public static int SaveDataCreateTransactionResource(CpuContext ctx)
     {
-        var memorySize = ctx[CpuRegister.Rdi];
-        int resource;
-        lock (_stateGate)
+        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
+        var reserved = ctx[CpuRegister.Rsi];
+        var resourceAddress = ctx[CpuRegister.Rdx];
+
+        if (resourceAddress == 0)
         {
-            resource = ++_nextTransactionResource;
-            _transactionResources.Add(resource);
+            return ctx.SetReturn(OrbisSaveDataErrorParameter);
         }
 
-        TraceSaveData($"create_transaction_resource memory_size=0x{memorySize:X} resource={resource}");
-        return ctx.SetReturn(resource);
-    }
+        var id = (uint)Interlocked.Increment(ref _nextTransactionResource);
 
-    [SysAbiExport(
-        Nid = "lJUQuaKqoKY",
-        ExportName = "sceSaveDataDeleteTransactionResource",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceSaveData")]
-    public static int SaveDataDeleteTransactionResource(CpuContext ctx)
-    {
-        var resource = unchecked((int)ctx[CpuRegister.Rdi]);
-        lock (_stateGate)
+        if (!ctx.TryWriteUInt32(resourceAddress, id))
         {
-            _transactionResources.Remove(resource);
+            return ctx.SetReturn((int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
         }
 
-        TraceSaveData($"delete_transaction_resource resource={resource}");
+        TraceSaveData(
+            $"create_transaction_resource user={userId} reserved=0x{reserved:X} resource_addr=0x{resourceAddress:X} id={id}");
+
         return ctx.SetReturn(0);
     }
 

src/SharpEmu.Libs/UserService/UserServiceExports.cs

@@ -13,8 +13,7 @@ public static class UserServiceExports
     private const int OrbisUserServiceErrorNoEvent = unchecked((int)0x80960007);
     private const int OrbisUserServiceErrorInvalidParameter = unchecked((int)0x80960009);
     private const int OrbisUserServiceErrorBufferTooShort = unchecked((int)0x8096000A);
-    // Retail user-service IDs begin at 0x3E8.
-    private const int PrimaryUserId = 1000;
+    private const int PrimaryUserId = 1;
     private const int InvalidUserId = -1;
     private const string PrimaryUserName = "SharpEmu";
     private static int _loginEventDelivered;
@@ -112,8 +111,7 @@ public static class UserServiceExports
         var userId = unchecked((int)ctx[CpuRegister.Rdi]);
         var nameAddress = ctx[CpuRegister.Rsi];
         var capacity = ctx[CpuRegister.Rdx];
-        // Zero selects the current user.
-        if (userId != 0 && userId != PrimaryUserId)
+        if (userId != PrimaryUserId)
         {
             return ctx.SetReturn(OrbisUserServiceErrorInvalidParameter);
         }
@@ -139,28 +137,6 @@ public static class UserServiceExports
         return ctx.SetReturn(result);
     }
 
-    [SysAbiExport(
-        Nid = "-sD02mFDBh4",
-        ExportName = "sceUserServiceGetGamePresets",
-        Target = Generation.Gen5,
-        LibraryName = "libSceUserService")]
-    public static int UserServiceGetGamePresets(CpuContext ctx)
-    {
-        // Return deterministic defaults for the offline profile.
-        var userId = unchecked((int)ctx[CpuRegister.Rdi]);
-        var resultAddress = ctx[CpuRegister.Rcx];
-        Span<byte> defaults = stackalloc byte[0x18];
-        if (resultAddress == 0 || !ctx.Memory.TryWrite(resultAddress, defaults))
-        {
-            return ctx.SetReturn(OrbisUserServiceErrorInvalidArgument);
-        }
-
-        TraceUserService(
-            $"get_game_presets user={userId} title=0x{ctx[CpuRegister.Rsi]:X16} " +
-            $"key=0x{ctx[CpuRegister.R9]:X} out=0x{resultAddress:X16} result=0x00000000");
-        return ctx.SetReturn(0);
-    }
-
     [SysAbiExport(
         Nid = "D-CzAxQL0XI",
         ExportName = "sceUserServiceGetPlatformPrivacySetting",

src/SharpEmu.Libs/VideoOut/VideoOutExports.cs

@@ -48,106 +48,54 @@ public static class VideoOutExports
     private static readonly Dictionary<int, VideoOutPortState> _ports = new();
 
     // Hardware raises vblank autonomously; UE blocks its frame loop on it.
-    private const double VblankHz = 60.0;
-    private const int VblankWaitTimeoutMilliseconds = 100;
-    private static Thread? _vblankPumpThread;
-    private static int _vblankPumpStarted;
-
-    private static readonly object _vblankEdgeGate = new();
-    private static ulong _vblankEdgeSequence;
-    private static long _vblankMissedEdges;
+    private static Timer? _vblankPumpTimer;
+    private static int _vblankPumpActive;
+    private const int VblankPumpIntervalMs = 16;
 
     private static void EnsureVblankPumpStarted()
     {
-        if (Interlocked.Exchange(ref _vblankPumpStarted, 1) != 0)
+        if (_vblankPumpTimer is not null)
         {
             return;
         }
 
-        HostTimerResolution.Request();
-
-        _vblankPumpThread = new Thread(VblankPumpLoop)
-        {
-            IsBackground = true,
-            Name = "SharpEmu VideoOut vblank",
-            Priority = ThreadPriority.AboveNormal,
-        };
-        _vblankPumpThread.Start();
-    }
-
-    private static void VblankPumpLoop()
-    {
-        var intervalTicks = Math.Max(1L, (long)(Stopwatch.Frequency / VblankHz));
-        var nextEdge = Stopwatch.GetTimestamp() + intervalTicks;
-
-        while (true)
-        {
-            WaitUntilTimestamp(nextEdge);
-            PumpVblanks();
-
-            nextEdge += intervalTicks;
-
-            var now = Stopwatch.GetTimestamp();
-            if (nextEdge < now)
-            {
-                var missed = (now - nextEdge) / intervalTicks + 1;
-                Interlocked.Add(ref _vblankMissedEdges, missed);
-                nextEdge = now + intervalTicks;
-            }
-        }
-    }
-
-    private static void WaitUntilTimestamp(long deadlineTicks)
-    {
-        var spinThresholdTicks = Stopwatch.Frequency * 2L / 1000L;
-
-        while (true)
-        {
-            var remaining = deadlineTicks - Stopwatch.GetTimestamp();
-            if (remaining <= 0)
-            {
-                return;
-            }
-
-            if (remaining > spinThresholdTicks)
-            {
-                var sleepMilliseconds =
-                    (int)((remaining - spinThresholdTicks) * 1000L / Stopwatch.Frequency);
-                if (sleepMilliseconds > 0)
-                {
-                    Thread.Sleep(sleepMilliseconds);
-                    continue;
-                }
-            }
-
-            Thread.SpinWait(64);
-        }
+        _vblankPumpTimer = new Timer(
+            static _ => PumpVblanks(),
+            null,
+            VblankPumpIntervalMs,
+            VblankPumpIntervalMs);
     }
 
     private static void PumpVblanks()
     {
-        lock (_vblankEdgeGate)
+        if (Interlocked.Exchange(ref _vblankPumpActive, 1) != 0)
         {
-            _vblankEdgeSequence++;
-            Monitor.PulseAll(_vblankEdgeGate);
+            return;
         }
 
-        VideoOutPortState[] ports;
-        lock (_stateGate)
+        try
         {
-            if (_ports.Count == 0)
+            VideoOutPortState[] ports;
+            lock (_stateGate)
             {
-                return;
+                if (_ports.Count == 0)
+                {
+                    return;
+                }
+
+                // Signalling reaches WakeBlockedThreads -> Pump(), which serialises on one global
+                // flag. Waking an unwatched queue would hold it 60x/sec and starve guest threads.
+                ports = _ports.Values.Where(static port => port.VblankEvents.Count != 0).ToArray();
             }
 
-            // Signalling reaches WakeBlockedThreads -> Pump(), which serialises on one global
-            // flag. Waking an unwatched queue would hold it 60x/sec and starve guest threads.
-            ports = _ports.Values.Where(static port => port.VblankEvents.Count != 0).ToArray();
+            foreach (var port in ports)
+            {
+                SignalVblank(port);
+            }
         }
-
-        foreach (var port in ports)
+        finally
         {
-            SignalVblank(port);
+            Volatile.Write(ref _vblankPumpActive, 0);
         }
     }
 
@@ -155,7 +103,6 @@ public static class VideoOutExports
     private static int _nextHandle = 1;
     private static int _frameDumpCount;
     private static long _nextFrameDumpIndex;
-    private static string _windowTitleBase = "SharpEmu VideoOut";
     private static string _windowTitle = "SharpEmu VideoOut";
     private static readonly bool _logFrameRate = string.Equals(
         Environment.GetEnvironmentVariable("SHARPEMU_LOG_VIDEOOUT_FPS"),
@@ -165,10 +112,6 @@ public static class VideoOutExports
         Environment.GetEnvironmentVariable("SHARPEMU_LOG_VIDEOOUT_SYNC"),
         "1",
         StringComparison.Ordinal);
-    private static readonly bool _dumpVideoOut = string.Equals(
-        Environment.GetEnvironmentVariable("SHARPEMU_DUMP_VIDEOOUT"),
-        "1",
-        StringComparison.Ordinal);
     private static long _frameRateWindowStart = Stopwatch.GetTimestamp();
     private static long _submittedFrameCount;
     private static long _presentedFrameCount;
@@ -191,24 +134,10 @@ public static class VideoOutExports
         var application = parts.Count == 0 ? "VideoOut" : string.Join(' ', parts);
         var versionSuffix = string.IsNullOrWhiteSpace(version) ? string.Empty : $" v{version.Trim()}";
         var commitSuffix = string.IsNullOrWhiteSpace(emulatorCommitSha) ? string.Empty : $" \u00b7 {emulatorCommitSha.Trim()}";
-        var hardwareSuffix = $" \u00b7 {HostSystemInfo.CpuName}";
+        var hardwareSuffix = $" \u00b7 {HostSystemInfo.CpuName} \u00b7 {HostSystemInfo.GpuName}";
         lock (_stateGate)
         {
-            _windowTitleBase = $"SharpEmu{commitSuffix} - {application}{versionSuffix}{hardwareSuffix}";
-            _windowTitle = $"{_windowTitleBase} \u00b7 {HostSystemInfo.GpuName}";
-        }
-    }
-
-    internal static void SetSelectedGpuName(string gpuName)
-    {
-        if (string.IsNullOrWhiteSpace(gpuName))
-        {
-            return;
-        }
-
-        lock (_stateGate)
-        {
-            _windowTitle = $"{_windowTitleBase} \u00b7 {gpuName.Trim()}";
+            _windowTitle = $"SharpEmu{commitSuffix} - {application}{versionSuffix}{hardwareSuffix}";
         }
     }
 
@@ -447,20 +376,7 @@ public static class VideoOutExports
             return OrbisVideoOutErrorInvalidHandle;
         }
 
-        EnsureVblankPumpStarted();
-
-        lock (_vblankEdgeGate)
-        {
-            var entryEdge = _vblankEdgeSequence;
-            while (_vblankEdgeSequence == entryEdge)
-            {
-                if (!Monitor.Wait(_vblankEdgeGate, VblankWaitTimeoutMilliseconds))
-                {
-                    break;
-                }
-            }
-        }
-
+        Thread.Sleep(1);
         SignalVblank(port);
 
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
@@ -1071,7 +987,10 @@ public static class VideoOutExports
                 displayBuffer.PitchInPixel);
         }
 
-        if (_dumpVideoOut)
+        if (string.Equals(
+                Environment.GetEnvironmentVariable("SHARPEMU_DUMP_VIDEOOUT"),
+                "1",
+                StringComparison.Ordinal))
         {
             _ = TryDumpFrame(ctx, port, bufferIndex, flipMode, flipArg);
         }
@@ -1131,11 +1050,9 @@ public static class VideoOutExports
         var elapsedSeconds = (double)elapsedTicks / Stopwatch.Frequency;
         var submitted = Interlocked.Exchange(ref _submittedFrameCount, 0);
         var presentedCount = Interlocked.Exchange(ref _presentedFrameCount, 0);
-        var missedEdges = Interlocked.Exchange(ref _vblankMissedEdges, 0);
         Console.Error.WriteLine(
             $"[LOADER][PERF] videoout submitted_fps={submitted / elapsedSeconds:F1} " +
-            $"presented_fps={presentedCount / elapsedSeconds:F1} " +
-            $"vblank_missed={missedEdges}");
+            $"presented_fps={presentedCount / elapsedSeconds:F1}");
     }
 
     private static int RegisterBufferRange(VideoOutPortState port, int startIndex, ReadOnlySpan<ulong> addresses, BufferAttribute attribute, int requestedGroupIndex = -1)

src/SharpEmu.Libs/VideoOut/VulkanVideoPresenter.cs

@@ -11,7 +11,6 @@ using Silk.NET.Vulkan.Extensions.EXT;
 using Silk.NET.Windowing;
 using System.Numerics;
 using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 using System.Security.Cryptography;
 using System.Text;
 using VkBuffer = Silk.NET.Vulkan.Buffer;
@@ -601,8 +600,7 @@ internal static unsafe class VulkanVideoPresenter
         var traceSubmission = false;
         lock (_gate)
         {
-            // VideoOut registration does not imply a rendered Vulkan image.
-            var known = _gpuGuestImages.ContainsKey(address);
+            var known = _availableGuestImages.ContainsKey(address);
             if (ShouldTracePresentedGuestImageContentsForDiagnostics())
             {
                 Console.Error.WriteLine(
@@ -624,7 +622,7 @@ internal static unsafe class VulkanVideoPresenter
                 {
                     Console.Error.WriteLine(
                         $"[LOADER][WARN] vk.submit_guest_image_unknown addr=0x{address:X16} " +
-                        $"{width}x{height} - flip target has no completed GPU render output");
+                        $"{width}x{height} - flip target was never registered as a render output");
                 }
 
                 return false;
@@ -935,8 +933,6 @@ internal static unsafe class VulkanVideoPresenter
         private ExtDebugUtils? _debugUtils;
         private PhysicalDevice _physicalDevice;
         private Device _device;
-        private PipelineCache _pipelineCache;
-        private string? _pipelineCachePath;
         private Queue _queue;
         private uint _queueFamilyIndex;
         private SwapchainKHR _swapchain;
@@ -954,9 +950,6 @@ internal static unsafe class VulkanVideoPresenter
         private CommandBuffer _presentationCommandBuffer;
         private VkSemaphore _imageAvailable;
         private VkSemaphore _renderFinished;
-        private Fence _presentationFence;
-        private bool _presentationInFlight;
-        private TranslatedDrawResources? _pendingPresentationResources;
         private VkBuffer _stagingBuffer;
         private DeviceMemory _stagingMemory;
         private ulong _stagingSize;
@@ -973,10 +966,6 @@ internal static unsafe class VulkanVideoPresenter
         private int _directPresentationCount;
         private readonly Dictionary<ulong, GuestImageResource> _guestImages = new();
         private readonly HashSet<(ulong Address, uint Width, uint Height, Format Format)> _tracedTextureCacheHits = new();
-        private static readonly bool _dumpTextures = string.Equals(
-            Environment.GetEnvironmentVariable("SHARPEMU_DUMP_TEXTURES"),
-            "1",
-            StringComparison.Ordinal);
         private readonly HashSet<(ulong Address, uint Width, uint Height, Format Format)> _tracedTextureUploads = new();
         private readonly HashSet<(ulong Address, uint Width, uint Height, uint Format)> _dumpedTextures = new();
         private readonly HashSet<(ulong Address, int Size)> _tracedGlobalBuffers = new();
@@ -999,7 +988,7 @@ internal static unsafe class VulkanVideoPresenter
         private readonly record struct GraphicsPipelineKey(
             string VertexShader,
             string FragmentShader,
-            Format RenderTargetFormat,
+            ulong RenderPass,
             PrimitiveTopology Topology,
             VulkanGuestBlendState Blend,
             string ResourceLayout,
@@ -1161,7 +1150,6 @@ internal static unsafe class VulkanVideoPresenter
             CreateSurface();
             SelectPhysicalDevice();
             CreateDevice();
-            CreatePipelineCache();
             CreateSwapchain();
             CreateCommandResources();
             CreateGuestDrawResources();
@@ -1571,11 +1559,8 @@ internal static unsafe class VulkanVideoPresenter
             }
 
             _vk.GetPhysicalDeviceProperties(_physicalDevice, out var selected);
-            var selectedName = SilkMarshal.PtrToString((nint)selected.DeviceName) ?? "unknown";
             Console.Error.WriteLine(
-                $"[LOADER][INFO] Vulkan device: {selectedName} ({selected.DeviceType})");
-            VideoOutExports.SetSelectedGpuName(selectedName);
-            _window.Title = VideoOutExports.GetWindowTitle();
+                $"[LOADER][INFO] Vulkan device: {SilkMarshal.PtrToString((nint)selected.DeviceName)} ({selected.DeviceType})");
         }
 
         private static int ScorePhysicalDevice(
@@ -1758,110 +1743,6 @@ internal static unsafe class VulkanVideoPresenter
             }
         }
 
-        private void CreatePipelineCache()
-        {
-            _vk.GetPhysicalDeviceProperties(_physicalDevice, out var properties);
-            var directory = Path.Combine(AppContext.BaseDirectory, "pipeline-cache");
-            _pipelineCachePath = Path.Combine(
-                directory,
-                $"vulkan-{properties.VendorID:X4}-{properties.DeviceID:X4}-{properties.DriverVersion:X8}.bin");
-
-            byte[] initialData = [];
-            try
-            {
-                if (File.Exists(_pipelineCachePath))
-                {
-                    initialData = File.ReadAllBytes(_pipelineCachePath);
-                }
-            }
-            catch (IOException exception)
-            {
-                Console.Error.WriteLine(
-                    $"[LOADER][WARN] Vulkan pipeline cache could not be read: {exception.Message}");
-            }
-
-            fixed (byte* initialDataPointer = initialData)
-            {
-                var createInfo = new PipelineCacheCreateInfo
-                {
-                    SType = StructureType.PipelineCacheCreateInfo,
-                    InitialDataSize = (nuint)initialData.Length,
-                    PInitialData = initialData.Length == 0 ? null : initialDataPointer,
-                };
-                var result = _vk.CreatePipelineCache(
-                    _device,
-                    &createInfo,
-                    null,
-                    out _pipelineCache);
-                if (result != Result.Success && initialData.Length != 0)
-                {
-                    createInfo.InitialDataSize = 0;
-                    createInfo.PInitialData = null;
-                    Check(
-                        _vk.CreatePipelineCache(
-                            _device,
-                            &createInfo,
-                            null,
-                            out _pipelineCache),
-                        "vkCreatePipelineCache(empty)");
-                    initialData = [];
-                }
-                else
-                {
-                    Check(result, "vkCreatePipelineCache");
-                }
-            }
-
-            Console.Error.WriteLine(
-                $"[LOADER][INFO] Vulkan pipeline cache: " +
-                $"{(initialData.Length == 0 ? "new" : $"loaded {initialData.Length} bytes")}");
-        }
-
-        private void SavePipelineCache()
-        {
-            if (_pipelineCache.Handle == 0 || string.IsNullOrWhiteSpace(_pipelineCachePath))
-            {
-                return;
-            }
-
-            try
-            {
-                nuint size = 0;
-                Check(
-                    _vk.GetPipelineCacheData(_device, _pipelineCache, &size, null),
-                    "vkGetPipelineCacheData(size)");
-                if (size == 0 || size > int.MaxValue)
-                {
-                    return;
-                }
-
-                var data = new byte[(int)size];
-                fixed (byte* dataPointer = data)
-                {
-                    Check(
-                        _vk.GetPipelineCacheData(
-                            _device,
-                            _pipelineCache,
-                            &size,
-                            dataPointer),
-                        "vkGetPipelineCacheData");
-                }
-
-                var directory = Path.GetDirectoryName(_pipelineCachePath);
-                if (!string.IsNullOrWhiteSpace(directory))
-                {
-                    Directory.CreateDirectory(directory);
-                }
-                File.WriteAllBytes(_pipelineCachePath, data.AsSpan(0, (int)size).ToArray());
-            }
-            catch (Exception exception) when (
-                exception is IOException or UnauthorizedAccessException or InvalidOperationException)
-            {
-                Console.Error.WriteLine(
-                    $"[LOADER][WARN] Vulkan pipeline cache could not be saved: {exception.Message}");
-            }
-        }
-
         private void CreateSwapchain()
         {
             Check(
@@ -1954,44 +1835,9 @@ internal static unsafe class VulkanVideoPresenter
             Check(_vk.CreateSemaphore(_device, &semaphoreInfo, null, out _imageAvailable), "vkCreateSemaphore");
             Check(_vk.CreateSemaphore(_device, &semaphoreInfo, null, out _renderFinished), "vkCreateSemaphore");
 
-            var fenceInfo = new FenceCreateInfo
-            {
-                SType = StructureType.FenceCreateInfo,
-            };
-            Check(
-                _vk.CreateFence(_device, &fenceInfo, null, out _presentationFence),
-                "vkCreateFence(presentation)");
-
             CreateStagingBuffer((ulong)_extent.Width * _extent.Height * 4);
         }
 
-        private void CompletePendingPresentation(bool wait)
-        {
-            if (!_presentationInFlight)
-            {
-                return;
-            }
-
-            var fence = _presentationFence;
-            var result = wait
-                ? _vk.WaitForFences(_device, 1, &fence, true, ulong.MaxValue)
-                : _vk.GetFenceStatus(_device, fence);
-            if (!wait && result == Result.NotReady)
-            {
-                return;
-            }
-
-            Check(result, "vkWaitForFences(presentation)");
-            _presentationInFlight = false;
-            if (_pendingPresentationResources is not null)
-            {
-                MarkSampledImagesInitialized(_pendingPresentationResources);
-                MarkStorageImagesInitialized(_pendingPresentationResources);
-                DestroyTranslatedDrawResources(_pendingPresentationResources);
-                _pendingPresentationResources = null;
-            }
-        }
-
         private CommandBuffer AllocateGuestCommandBuffer()
         {
             var allocateInfo = new CommandBufferAllocateInfo
@@ -2338,7 +2184,7 @@ internal static unsafe class VulkanVideoPresenter
                 Check(
                     _vk.CreateGraphicsPipelines(
                         _device,
-                        _pipelineCache,
+                        default,
                         1,
                         &pipelineInfo,
                         null,
@@ -2373,7 +2219,6 @@ internal static unsafe class VulkanVideoPresenter
         private TranslatedDrawResources CreateTranslatedDrawResources(
             VulkanTranslatedGuestDraw draw,
             RenderPass renderPass,
-            Format renderTargetFormat,
             Extent2D extent)
         {
             var vertexSpirv = draw.VertexSpirv;
@@ -2440,13 +2285,7 @@ internal static unsafe class VulkanVideoPresenter
                 CreateTranslatedDescriptorResources(
                     resources,
                     ShaderStageFlags.VertexBit | ShaderStageFlags.FragmentBit);
-                CreateTranslatedPipeline(
-                    resources,
-                    vertexSpirv,
-                    draw.PixelSpirv,
-                    renderPass,
-                    renderTargetFormat,
-                    extent);
+                CreateTranslatedPipeline(resources, vertexSpirv, draw.PixelSpirv, renderPass, extent);
                 return resources;
             }
             catch
@@ -2742,13 +2581,12 @@ internal static unsafe class VulkanVideoPresenter
             byte[] vertexSpirv,
             byte[] fragmentSpirv,
             RenderPass renderPass,
-            Format renderTargetFormat,
             Extent2D extent)
         {
             var pipelineKey = new GraphicsPipelineKey(
                 GetShaderDigest(vertexSpirv),
                 GetShaderDigest(fragmentSpirv),
-                renderTargetFormat,
+                renderPass.Handle,
                 resources.Topology,
                 resources.Blend,
                 GetResourceLayoutKey(resources),
@@ -2904,7 +2742,7 @@ internal static unsafe class VulkanVideoPresenter
                     Check(
                         _vk.CreateGraphicsPipelines(
                             _device,
-                            _pipelineCache,
+                            default,
                             1,
                             &pipelineInfo,
                             null,
@@ -3084,7 +2922,7 @@ internal static unsafe class VulkanVideoPresenter
                 Check(
                     _vk.CreateComputePipelines(
                         _device,
-                        _pipelineCache,
+                        default,
                         1,
                         &pipelineInfo,
                         null,
@@ -3610,36 +3448,11 @@ internal static unsafe class VulkanVideoPresenter
         {
             const ulong offsetBasis = 14695981039346656037;
             const ulong prime = 1099511628211;
-
-            var h0 = offsetBasis ^ (ulong)pixels.Length;
-            var h1 = offsetBasis;
-            var h2 = offsetBasis;
-            var h3 = offsetBasis;
-
-            var words = MemoryMarshal.Cast<byte, ulong>(pixels);
-            var index = 0;
-            var blockEnd = words.Length - (words.Length & 3);
-            for (; index < blockEnd; index += 4)
+            var hash = offsetBasis;
+            foreach (var value in pixels)
             {
-                h0 = (h0 ^ words[index]) * prime;
-                h1 = (h1 ^ words[index + 1]) * prime;
-                h2 = (h2 ^ words[index + 2]) * prime;
-                h3 = (h3 ^ words[index + 3]) * prime;
-            }
-
-            for (; index < words.Length; index++)
-            {
-                h0 = (h0 ^ words[index]) * prime;
-            }
-
-            var hash = h0;
-            hash = (hash ^ h1) * prime;
-            hash = (hash ^ h2) * prime;
-            hash = (hash ^ h3) * prime;
-
-            foreach (var value in pixels[(words.Length * sizeof(ulong))..])
-            {
-                hash = (hash ^ value) * prime;
+                hash ^= value;
+                hash *= prime;
             }
 
             return hash;
@@ -3652,7 +3465,10 @@ internal static unsafe class VulkanVideoPresenter
             uint width,
             uint height)
         {
-            if (!_dumpTextures ||
+            if (!string.Equals(
+                    Environment.GetEnvironmentVariable("SHARPEMU_DUMP_TEXTURES"),
+                    "1",
+                    StringComparison.Ordinal) ||
                 texture.IsFallback ||
                 texture.IsStorage ||
                 GetTextureBytesPerPixel(texture.Format) != 4 ||
@@ -4673,7 +4489,6 @@ internal static unsafe class VulkanVideoPresenter
                 resources = CreateTranslatedDrawResources(
                     work.Draw,
                     target.RenderPass,
-                    target.Format,
                     extent);
                 resources.DebugName =
                     $"SharpEmu offscreen rt=0x{work.Target.Address:X16} " +
@@ -5310,8 +5125,6 @@ internal static unsafe class VulkanVideoPresenter
                 return;
             }
 
-            CompletePendingPresentation(wait: true);
-
             byte[]? pixels = null;
             if (presentation.Pixels is { } sourcePixels)
             {
@@ -5359,7 +5172,6 @@ internal static unsafe class VulkanVideoPresenter
                     translatedResources = CreateTranslatedDrawResources(
                         translatedDraw,
                         _renderPass,
-                        _swapchainFormat,
                         _extent);
                     if (ShouldTracePresentedGuestImageContentsForDiagnostics() &&
                         !_firstGuestDrawPresented)
@@ -5491,16 +5303,7 @@ internal static unsafe class VulkanVideoPresenter
                 SignalSemaphoreCount = 1,
                 PSignalSemaphores = &renderFinished,
             };
-            var presentationFence = _presentationFence;
-            Check(
-                _vk.ResetFences(_device, 1, &presentationFence),
-                "vkResetFences(presentation)");
-            Check(
-                _vk.QueueSubmit(_queue, 1, &submitInfo, presentationFence),
-                "vkQueueSubmit");
-            _presentationInFlight = true;
-            _pendingPresentationResources = translatedResources;
-            translatedResources = null;
+            Check(_vk.QueueSubmit(_queue, 1, &submitInfo, default), "vkQueueSubmit");
 
             var swapchain = _swapchain;
             var presentInfo = new PresentInfoKHR
@@ -5516,7 +5319,6 @@ internal static unsafe class VulkanVideoPresenter
             if (presentResult == Result.ErrorOutOfDateKhr)
             {
                 Check(_vk.QueueWaitIdle(_queue), "vkQueueWaitIdle");
-                CompletePendingPresentation(wait: false);
                 CollectCompletedGuestSubmissions(waitForOldest: false);
                 if (translatedResources is not null)
                 {
@@ -5529,13 +5331,19 @@ internal static unsafe class VulkanVideoPresenter
 
             CheckSwapchainResult(presentResult, "vkQueuePresentKHR");
             recreateAfterPresent |= presentResult == Result.SuboptimalKhr;
+            Check(_vk.QueueWaitIdle(_queue), "vkQueueWaitIdle");
             VideoOutExports.ReportPresentedFrame();
             if (_swapchainReadbackPending)
             {
-                CompletePendingPresentation(wait: true);
                 TraceSwapchainReadback();
             }
             CollectCompletedGuestSubmissions(waitForOldest: false);
+            if (translatedResources is not null)
+            {
+                MarkSampledImagesInitialized(translatedResources);
+                MarkStorageImagesInitialized(translatedResources);
+                DestroyTranslatedDrawResources(translatedResources);
+            }
 
             _imageInitialized[imageIndex] = true;
             _presentedSequence = presentation.Sequence;
@@ -6789,9 +6597,7 @@ internal static unsafe class VulkanVideoPresenter
             }
             _vulkanReady = false;
             _vk.DeviceWaitIdle(_device);
-            CompletePendingPresentation(wait: false);
             CollectCompletedGuestSubmissions(waitForOldest: false);
-            SavePipelineCache();
             foreach (var pipeline in _computePipelines.Values)
             {
                 _vk.DestroyPipeline(_device, pipeline, null);
@@ -6802,11 +6608,6 @@ internal static unsafe class VulkanVideoPresenter
                 _vk.DestroyPipeline(_device, pipeline, null);
             }
             _graphicsPipelines.Clear();
-            if (_pipelineCache.Handle != 0)
-            {
-                _vk.DestroyPipelineCache(_device, _pipelineCache, null);
-                _pipelineCache = default;
-            }
             foreach (var layout in _descriptorLayouts.Values)
             {
                 _vk.DestroyPipelineLayout(_device, layout.PipelineLayout, null);
@@ -6898,7 +6699,6 @@ internal static unsafe class VulkanVideoPresenter
             Console.Error.WriteLine(
                 $"[LOADER][INFO] Vulkan VideoOut recreating swapchain after {operation}: {result}");
             _vk.DeviceWaitIdle(_device);
-            CompletePendingPresentation(wait: false);
             CollectCompletedGuestSubmissions(waitForOldest: false);
             DestroySwapchainResources();
             CreateSwapchain();
@@ -6932,11 +6732,6 @@ internal static unsafe class VulkanVideoPresenter
                 _vk.DestroySemaphore(_device, _renderFinished, null);
                 _renderFinished = default;
             }
-            if (_presentationFence.Handle != 0)
-            {
-                _vk.DestroyFence(_device, _presentationFence, null);
-                _presentationFence = default;
-            }
             if (_barycentricPipeline.Handle != 0)
             {
                 _vk.DestroyPipeline(_device, _barycentricPipeline, null);

src/SharpEmu.Libs/Voice/VoiceQoSExports.cs

@@ -1,19 +0,0 @@
-// Copyright (C) 2026 SharpEmu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-using SharpEmu.HLE;
-
-namespace SharpEmu.Libs.Voice;
-
-public static class VoiceQoSExports
-{
-    [SysAbiExport(
-        Nid = "U8IfNl6-Css",
-        ExportName = "sceVoiceQoSInit",
-        Target = Generation.Gen4 | Generation.Gen5,
-        LibraryName = "libSceVoiceQoS")]
-    public static int VoiceQoSInit(CpuContext ctx)
-    {
-        return ctx.SetReturn(0);
-    }
-}

src/SharpEmu.Logging/FileLogSink.cs

@@ -6,15 +6,19 @@ using System.Text;
 
 namespace SharpEmu.Logging;
 
+/// <summary>
+/// Writes log entries to a file. Thread-safe via an internal lock.
+/// <see cref="StreamWriter.AutoFlush"/> is enabled so entries survive a crash.
+/// </summary>
 public sealed class FileLogSink : ISharpEmuLogSink, IDisposable
 {
-    private static readonly TimeSpan FlushInterval = TimeSpan.FromMilliseconds(500);
-
     private readonly object _sync = new();
     private readonly StreamWriter _writer;
-    private readonly Timer _flushTimer;
     private bool _disposed;
 
+    /// <param name="path">Absolute or relative file path. Parent directories are created if missing.</param>
+    /// <param name="append"><see langword="true"/> to append to an existing file; <see langword="false"/> to overwrite.</param>
+    /// <param name="includeTimestamp">Always recommended for file logs — entries include a full date-time prefix.</param>
     public FileLogSink(string path, bool append = true, bool includeTimestamp = true)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(path);
@@ -30,20 +34,14 @@ public sealed class FileLogSink : ISharpEmuLogSink, IDisposable
             append ? FileMode.Append : FileMode.Create,
             FileAccess.Write,
             FileShare.Read,
-            bufferSize: 65536,
+            bufferSize: 4096,
             FileOptions.SequentialScan);
-        _writer = new StreamWriter(fileStream, Encoding.UTF8, bufferSize: 65536)
+        _writer = new StreamWriter(fileStream, Encoding.UTF8)
         {
-            AutoFlush = false
+            AutoFlush = true
         };
 
         IncludeTimestamp = includeTimestamp;
-
-        _flushTimer = new Timer(
-            static state => ((FileLogSink)state!).FlushBuffered(),
-            this,
-            FlushInterval,
-            FlushInterval);
     }
 
     public bool IncludeTimestamp { get; set; }
@@ -86,31 +84,11 @@ public sealed class FileLogSink : ISharpEmuLogSink, IDisposable
             {
                 _writer.WriteLine(entry.Exception);
             }
-
-            if (entry.Level >= LogLevel.Error)
-            {
-                _writer.Flush();
-            }
-        }
-    }
-
-    private void FlushBuffered()
-    {
-        lock (_sync)
-        {
-            if (_disposed)
-            {
-                return;
-            }
-
-            _writer.Flush();
         }
     }
 
     public void Dispose()
     {
-        _flushTimer.Dispose();
-
         lock (_sync)
         {
             if (_disposed)

src/SharpEmu.Logging/HostSystemInfo.cs

@@ -36,16 +36,11 @@ public static class HostSystemInfo
             using var key = Registry.LocalMachine.OpenSubKey(@"HARDWARE\DESCRIPTION\System\CentralProcessor\0");
             if (key?.GetValue("ProcessorNameString") is string name && !string.IsNullOrWhiteSpace(name))
             {
-                name = Regex.Replace(
+                return Regex.Replace(
                     name.Trim(),
                     @"\s+\d+-Core Processor$",
                     string.Empty,
                     RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
-                return Regex.Replace(
-                    name,
-                    @"\s+with Radeon Graphics$",
-                    string.Empty,
-                    RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
             }
         }
         catch (Exception)
@@ -108,12 +103,8 @@ public static class HostSystemInfo
         }
 
         if (name.Contains("nvidia", StringComparison.OrdinalIgnoreCase) ||
-            name.Contains("geforce", StringComparison.OrdinalIgnoreCase))
-        {
-            return 3;
-        }
-
-        if (name.Contains("amd", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("geforce", StringComparison.OrdinalIgnoreCase) ||
+            name.Contains("amd", StringComparison.OrdinalIgnoreCase) ||
             name.Contains("radeon", StringComparison.OrdinalIgnoreCase))
         {
             return 2;