From d4276d89f8d78c80aea921da2b929d9a5e0b6a0e Mon Sep 17 00:00:00 2001
From: ParantezTech <12572227+par274@users.noreply.github.com>
Date: Sun, 11 Oct 2026 06:11:55 +0300
Subject: [PATCH] [Profile] Count DCC metadata synchronizations and their
 outcome

---
 .../Gpu/Images/GuestImageCache.Metadata.cs          | 13 +++++++++++++
 src/SharpEmu.Libs/VideoOut/RenderPhaseProfile.cs    |  1 +
 2 files changed, 14 insertions(+)

diff --git a/src/SharpEmu.Libs/Gpu/Images/GuestImageCache.Metadata.cs b/src/SharpEmu.Libs/Gpu/Images/GuestImageCache.Metadata.cs
index ab099e0..660acfd 100644
--- a/src/SharpEmu.Libs/Gpu/Images/GuestImageCache.Metadata.cs
+++ b/src/SharpEmu.Libs/Gpu/Images/GuestImageCache.Metadata.cs
@@ -11,6 +11,14 @@ namespace SharpEmu.Libs.Gpu.Images;
 // Surface metadata (HTile, DCC, CMask, FMask) keyed by its guest address.
 public sealed partial class GuestImageCache
 {
+    private static long _dccSyncs;
+    private static long _dccSlicesUndecodable;
+    private static long _dccSlicesMixed;
+    private static long _dccSlicesCleared;
+
+    public static string TakeDccReport() => FormattableString.Invariant(
+        $"[PERF][DCC_SYNC] gpu_syncs={Interlocked.Exchange(ref _dccSyncs, 0)} cleared={Interlocked.Exchange(ref _dccSlicesCleared, 0)} mixed={Interlocked.Exchange(ref _dccSlicesMixed, 0)} undecodable={Interlocked.Exchange(ref _dccSlicesUndecodable, 0)}");
+
     private unsafe void MaterializeDccClear(
         ResourceSlotIdentifier imageIdentifier,
         in ImageRequest request,
@@ -96,6 +104,7 @@ public sealed partial class GuestImageCache
                         allowClearToRegister: request.Role == ImageRole.ColorTarget,
                         out var clear))
                 {
+                    Interlocked.Increment(ref _dccSlicesUndecodable);
                     continue;
                 }
 
@@ -126,9 +135,12 @@ public sealed partial class GuestImageCache
 
                 if (!uniform)
                 {
+                    Interlocked.Increment(ref _dccSlicesMixed);
                     continue;
                 }
 
+                Interlocked.Increment(ref _dccSlicesCleared);
+
                 using (var held = _lock.Hold())
                 {
                     if (_slots.TryGet(imageIdentifier) == null)
@@ -423,6 +435,7 @@ public sealed partial class GuestImageCache
         var size = (ulong)layerCount * sliceSize;
         if (IsValidRange(address, size) && _bufferCache.HasGpuDirtyBytes(address, size))
         {
+            Interlocked.Increment(ref _dccSyncs);
             _ = _bufferCache.TrySynchronizeCpuRead(address, size);
         }
     }
diff --git a/src/SharpEmu.Libs/VideoOut/RenderPhaseProfile.cs b/src/SharpEmu.Libs/VideoOut/RenderPhaseProfile.cs
index eb5e5d5..a1f6c38 100644
--- a/src/SharpEmu.Libs/VideoOut/RenderPhaseProfile.cs
+++ b/src/SharpEmu.Libs/VideoOut/RenderPhaseProfile.cs
@@ -472,6 +472,7 @@ internal static class RenderPhaseProfile
         Console.Error.WriteLine(SharpEmu.Libs.Gpu.Buffers.GuestBufferCache.TakeAsyncReadbackReport());
         Console.Error.WriteLine(SharpEmu.Libs.Gpu.Vulkan.GpuSyncProfile.TakeReport());
         Console.Error.WriteLine(SharpEmu.Libs.Gpu.Images.GuestImageCache.TakeLookupReport());
+        Console.Error.WriteLine(SharpEmu.Libs.Gpu.Images.GuestImageCache.TakeDccReport());
         SharpEmu.ShaderCompiler.Resources.ResourceMaterializationProfile.WriteReport();
         SharpEmu.Libs.Diagnostics.AgcRegisterPacketProfile.WriteReport();
         SharpEmu.HLE.GpuMemory.GpuMemoryAccessProfile.WriteReport();