Max FPS: thread priority, sustained perf always-on, hardwareAccelerated, cutout mode

- Set THREAD_PRIORITY_URGENT_DISPLAY (-8) on update/draw/input threads
- Always enable SustainedPerformanceMode (not gated behind toggle)
- Add android:hardwareAccelerated=true to AndroidManifest
- LayoutInDisplayCutoutMode.ShortEdges for full render area
- Recycle dummy MotionEvent from early unbuffered dispatch
- Fix integer overflow in affinity mask for 32+ core devices
- Vulkan only shown when IsVulkanRecommended (not just supported)
- Lazy VulkanProbe: no startup cost, only when setting enabled

Agent-Logs-Url: https://github.com/winnerspiros/osu/sessions/62a8048b-6fe1-424d-9c00-a3fbddf6ba74

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>

Author: Copilot

osu.Android/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="sh.ppy.osulazer" android:installLocation="auto">
 	<uses-sdk android:minSdkVersion="33" android:targetSdkVersion="36" />
-	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher" android:largeHeap="true">
+	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!" android:icon="@mipmap/ic_launcher" android:roundIcon="@mipmap/ic_launcher" android:largeHeap="true" android:hardwareAccelerated="true">
         <provider android:name="androidx.core.content.FileProvider" android:authorities="sh.ppy.osulazer.fileprovider" android:grantUriPermissions="true" android:exported="false">
             <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/filepaths" />
         </provider>

osu.Android/AndroidNativeBridgeManager.cs

@@ -55,7 +55,7 @@ public void StartOboeBridge(Scheduler scheduler, Action<double> onLatencyMeasure
                         for (int i = bigStart; i < Math.Min(cores, 32); i++)
                             audioAffinityMask |= 1 << i;
 
-                        if (audioAffinityMask == 0) audioAffinityMask = (1 << cores) - 1;
+                        if (audioAffinityMask == 0) audioAffinityMask = (1 << Math.Min(cores, 31)) - 1;
 
                         try { SetThreadAffinity(audioAffinityMask); }
                         catch (Exception e) { Debug.WriteLine($"[osu!] Audio thread affinity failed: {e.Message}"); }

osu.Android/OsuGameActivity.cs

@@ -93,11 +93,19 @@ protected override void OnCreate(Bundle? savedInstanceState)
                 Window.AddFlags(WindowManagerFlags.Fullscreen);
                 Window.AddFlags(WindowManagerFlags.KeepScreenOn);
 
+                // Use full display area including camera cutout/notch for maximum render space.
+                if (OperatingSystem.IsAndroidVersionAtLeast(28) && Window.Attributes != null)
+                    Window.Attributes.LayoutInDisplayCutoutMode = LayoutInDisplayCutoutMode.ShortEdges;
+
                 // Request unbuffered touch dispatch early for minimum input latency.
-                // This applies to all subsequent touch events for this window.
                 if (OperatingSystem.IsAndroidVersionAtLeast(21))
                 {
-                    try { Window.DecorView?.RequestUnbufferedDispatch(MotionEvent.Obtain(0, 0, MotionEventActions.Down, 0, 0, 0)); }
+                    try
+                    {
+                        var dummy = MotionEvent.Obtain(0, 0, MotionEventActions.Down, 0, 0, 0);
+                        Window.DecorView?.RequestUnbufferedDispatch(dummy);
+                        dummy?.Recycle();
+                    }
                     catch { /* best-effort; will also be requested per-event in dispatch methods */ }
                 }
 

osu.Android/OsuGameAndroid.cs

@@ -207,25 +207,38 @@ protected override void LoadComplete()
                 affinityMask |= 1 << i;
 
             if (affinityMask == 0)
-                affinityMask = (1 << coreCount) - 1; // fallback: use all cores
+                affinityMask = (1 << Math.Min(coreCount, 31)) - 1;
 
             try
             {
                 if (OboeAudioBridge.nSetThreadAffinity(affinityMask) != 0)
                     Logger.Log($"[osu!] Update thread pinned to big cores (mask=0x{affinityMask:X}, cores {bigCoreStart}-{coreCount - 1})", LoggingTarget.Performance);
 
+                // Set update thread to urgent display priority (-8) for minimum scheduling latency.
+                global::Android.OS.Process.SetThreadPriority(global::Android.OS.ThreadPriority.UrgentDisplay);
+
                 int mask = affinityMask;
 
                 Scheduler.Add(() =>
                 {
                     Host.DrawThread.Scheduler.Add(() =>
                     {
-                        try { if (OboeAudioBridge.nSetThreadAffinity(mask) != 0) Logger.Log("[osu!] Render thread pinned to big cores", LoggingTarget.Performance); } catch { }
+                        try
+                        {
+                            if (OboeAudioBridge.nSetThreadAffinity(mask) != 0) Logger.Log("[osu!] Render thread pinned to big cores", LoggingTarget.Performance);
+                            global::Android.OS.Process.SetThreadPriority(global::Android.OS.ThreadPriority.UrgentDisplay);
+                        }
+                        catch { }
                     });
 
                     Host.InputThread.Scheduler.Add(() =>
                     {
-                        try { if (OboeAudioBridge.nSetThreadAffinity(mask) != 0) Logger.Log("[osu!] Input thread pinned to big cores", LoggingTarget.Performance); } catch { }
+                        try
+                        {
+                            if (OboeAudioBridge.nSetThreadAffinity(mask) != 0) Logger.Log("[osu!] Input thread pinned to big cores", LoggingTarget.Performance);
+                            global::Android.OS.Process.SetThreadPriority(global::Android.OS.ThreadPriority.UrgentDisplay);
+                        }
+                        catch { }
                     });
                 });
             }
@@ -234,6 +247,11 @@ protected override void LoadComplete()
                 Logger.Log($"[osu!] Failed to pin threads: {e.Message}", LoggingTarget.Performance);
             }
 
+            // Always enable sustained performance mode for consistent frame delivery.
+            // This prevents thermal throttling from causing sudden FPS drops.
+            try { gameActivity.Window?.SetSustainedPerformanceMode(true); }
+            catch { }
+
             base.LoadComplete();
 
             // Always select the highest refresh rate on startup, regardless of performance mode.
@@ -362,8 +380,8 @@ private void applyPerformanceOptimizations(bool enabled)
             {
                 try
                 {
-                    gameActivity.Window?.SetSustainedPerformanceMode(enabled);
-
+                    // Sustained performance mode is always on (set in LoadComplete).
+                    // The performance toggle controls the high-perf GC session only.
                     if (enabled)
                     {
                         highPerformanceSession ??= highPerformanceSessionManager.BeginSession();
@@ -373,9 +391,6 @@ private void applyPerformanceOptimizations(bool enabled)
                         highPerformanceSession?.Dispose();
                         highPerformanceSession = null;
                     }
-
-                    // Refresh rate is controlled by SelectHighestRefreshRate() (called once in LoadComplete)
-                    // and the user's SelectedDisplayRefreshRate bindable. No need to re-apply here.
                 }
                 catch (Exception e)
                 {