Android fixes and features

* Jit cache eviction (fixes out of memory errors in some games)

* Low power PPTC

* Fix 'unknown' games displayed when using game folder with subfolders

* Turn off NCE and PPTC by default

src/Ryujinx.Cpu/LightningJit/Cache/JitCache.cs

@@ -1,8 +1,11 @@
+using ARMeilleure;
 using ARMeilleure.Memory;
+using Ryujinx.Common.Logging;
 using Ryujinx.Memory;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Linq;
 using System.Runtime.InteropServices;
 using System.Runtime.Versioning;
 using System.Threading;
@@ -14,8 +17,15 @@ namespace Ryujinx.Cpu.LightningJit.Cache
         private static readonly int _pageSize = (int)MemoryBlock.GetPageSize();
         private static readonly int _pageMask = _pageSize - 1;
 
-        private const int CodeAlignment = 4; // Bytes.
-        private const int CacheSize = 2047 * 1024 * 1024;
+        private const int CodeAlignment = 4;
+        private const int FullCacheSize = 2047 * 1024 * 1024;
+        private const int ReducedCacheSize = FullCacheSize / 8;
+
+        private const float EvictionTargetPercentage = 0.20f;
+        private const int MaxEntriesToEvictAtOnce = 100;
+
+        // Simple logging configuration
+        private const int LogInterval = 5000;  // Log every 5000 allocations
 
         private static ReservedRegion _jitRegion;
         private static JitCacheInvalidation _jitCacheInvalidator;
@@ -23,9 +33,33 @@ namespace Ryujinx.Cpu.LightningJit.Cache
         private static CacheMemoryAllocator _cacheAllocator;
 
         private static readonly List<CacheEntry> _cacheEntries = [];
+        private static readonly Dictionary<int, EntryUsageStats> _entryUsageStats = [];
 
         private static readonly Lock _lock = new();
         private static bool _initialized;
+        private static int _cacheSize;
+
+        // Basic statistics
+        private static int _totalAllocations = 0;
+        private static int _totalEvictions = 0;
+
+        private class EntryUsageStats
+        {
+            public long LastAccessTime { get; private set; }
+            public int UsageCount { get; private set; }
+
+            public EntryUsageStats()
+            {
+                LastAccessTime = DateTime.UtcNow.Ticks;
+                UsageCount = 1;
+            }
+
+            public void UpdateUsage()
+            {
+                LastAccessTime = DateTime.UtcNow.Ticks;
+                UsageCount++;
+            }
+        }
 
         [SupportedOSPlatform("windows")]
         [LibraryImport("kernel32.dll", SetLastError = true)]
@@ -45,15 +79,17 @@ namespace Ryujinx.Cpu.LightningJit.Cache
                     return;
                 }
 
-                _jitRegion = new ReservedRegion(allocator, CacheSize);
+                _cacheSize = Optimizations.CacheEviction ? ReducedCacheSize : FullCacheSize;
+                _jitRegion = new ReservedRegion(allocator, (ulong)_cacheSize);
 
                 if (!OperatingSystem.IsWindows() && !OperatingSystem.IsMacOS())
                 {
                     _jitCacheInvalidator = new JitCacheInvalidation(allocator);
                 }
 
-                _cacheAllocator = new CacheMemoryAllocator(CacheSize);
+                _cacheAllocator = new CacheMemoryAllocator(_cacheSize);
 
+                Logger.Info?.Print(LogClass.Cpu, $"Lightning JIT Cache initialized: Size={_cacheSize / (1024 * 1024)} MB, Eviction={Optimizations.CacheEviction}");
                 _initialized = true;
             }
         }
@@ -63,8 +99,32 @@ namespace Ryujinx.Cpu.LightningJit.Cache
             lock (_lock)
             {
                 Debug.Assert(_initialized);
+                _totalAllocations++;
 
-                int funcOffset = Allocate(code.Length);
+                int funcOffset;
+
+                if (Optimizations.CacheEviction)
+                {
+                    int codeSize = AlignCodeSize(code.Length);
+                    funcOffset = _cacheAllocator.Allocate(codeSize);
+
+                    if (funcOffset < 0)
+                    {
+                        EvictEntries(codeSize);
+                        funcOffset = _cacheAllocator.Allocate(codeSize);
+
+                        if (funcOffset < 0)
+                        {
+                            throw new OutOfMemoryException("JIT Cache exhausted even after eviction.");
+                        }
+                    }
+
+                    _jitRegion.ExpandIfNeeded((ulong)funcOffset + (ulong)codeSize);
+                }
+                else
+                {
+                    funcOffset = Allocate(code.Length);
+                }
 
                 IntPtr funcPtr = _jitRegion.Pointer + funcOffset;
 
@@ -96,6 +156,12 @@ namespace Ryujinx.Cpu.LightningJit.Cache
 
                 Add(funcOffset, code.Length);
 
+                // Simple periodic logging
+                if (_totalAllocations % LogInterval == 0)
+                {
+                    LogCacheStatus();
+                }
+
                 return funcPtr;
             }
         }
@@ -112,6 +178,11 @@ namespace Ryujinx.Cpu.LightningJit.Cache
                 {
                     _cacheAllocator.Free(funcOffset, AlignCodeSize(entry.Size));
                     _cacheEntries.RemoveAt(entryIndex);
+
+                    if (Optimizations.CacheEviction)
+                    {
+                        _entryUsageStats.Remove(funcOffset);
+                    }
                 }
             }
         }
@@ -169,6 +240,11 @@ namespace Ryujinx.Cpu.LightningJit.Cache
             }
 
             _cacheEntries.Insert(index, entry);
+
+            if (Optimizations.CacheEviction)
+            {
+                _entryUsageStats[offset] = new EntryUsageStats();
+            }
         }
 
         public static bool TryFind(int offset, out CacheEntry entry, out int entryIndex)
@@ -185,6 +261,12 @@ namespace Ryujinx.Cpu.LightningJit.Cache
                 if (index >= 0)
                 {
                     entry = _cacheEntries[index];
+
+                    if (Optimizations.CacheEviction && _entryUsageStats.TryGetValue(offset, out var stats))
+                    {
+                        stats.UpdateUsage();
+                    }
+
                     entryIndex = index;
                     return true;
                 }
@@ -194,5 +276,83 @@ namespace Ryujinx.Cpu.LightningJit.Cache
             entryIndex = 0;
             return false;
         }
+
+        private static void EvictEntries(int requiredSize)
+        {
+            if (!Optimizations.CacheEviction)
+            {
+                return;
+            }
+
+            lock (_lock)
+            {
+                int targetSpace = Math.Max(requiredSize, (int)(_cacheSize * EvictionTargetPercentage));
+                int freedSpace = 0;
+                int evictedCount = 0;
+
+                var entriesWithStats = _cacheEntries
+                    .Where(e => _entryUsageStats.ContainsKey(e.Offset))
+                    .Select(e => new {
+                        Entry = e,
+                        Stats = _entryUsageStats[e.Offset],
+                        Score = CalculateEvictionScore(_entryUsageStats[e.Offset])
+                    })
+                    .OrderBy(x => x.Score)
+                    .Take(MaxEntriesToEvictAtOnce)
+                    .ToList();
+
+                foreach (var item in entriesWithStats)
+                {
+                    int entrySize = AlignCodeSize(item.Entry.Size);
+
+                    int entryIndex = _cacheEntries.BinarySearch(item.Entry);
+                    if (entryIndex >= 0)
+                    {
+                        _cacheAllocator.Free(item.Entry.Offset, entrySize);
+                        _cacheEntries.RemoveAt(entryIndex);
+                        _entryUsageStats.Remove(item.Entry.Offset);
+
+                        freedSpace += entrySize;
+                        evictedCount++;
+
+                        if (freedSpace >= targetSpace)
+                        {
+                            break;
+                        }
+                    }
+                }
+
+                _totalEvictions += evictedCount;
+
+                Logger.Info?.Print(LogClass.Cpu, $"Lightning JIT Cache: Evicted {evictedCount} entries, freed {freedSpace / (1024 * 1024.0):F2} MB");
+            }
+        }
+
+        private static double CalculateEvictionScore(EntryUsageStats stats)
+        {
+            long currentTime = DateTime.UtcNow.Ticks;
+            long ageInTicks = currentTime - stats.LastAccessTime;
+
+            double ageInSeconds = ageInTicks / 10_000_000.0;
+
+            const double usageWeight = 1.0;
+            const double ageWeight = 2.0;
+
+            double usageScore = Math.Log10(stats.UsageCount + 1) * usageWeight;
+            double ageScore = (10.0 / (ageInSeconds + 1.0)) * ageWeight;
+
+            return usageScore + ageScore;
+        }
+
+        private static void LogCacheStatus()
+        {
+            int estimatedUsedSize = _cacheEntries.Sum(e => AlignCodeSize(e.Size));
+            double usagePercentage = 100.0 * estimatedUsedSize / _cacheSize;
+
+            Logger.Info?.Print(LogClass.Cpu,
+                $"Lightning JIT Cache status: entries={_cacheEntries.Count}, " +
+                $"est. used={estimatedUsedSize / (1024 * 1024.0):F2} MB ({usagePercentage:F1}%), " +
+                $"evictions={_totalEvictions}, allocations={_totalAllocations}");
+        }
     }
 }

src/Ryujinx.Cpu/LightningJit/Cache/NoWxCache.cs

@@ -12,7 +12,7 @@ namespace Ryujinx.Cpu.LightningJit.Cache
     {
         private const int CodeAlignment = 4; // Bytes.
         private const int SharedCacheSize = 2047 * 1024 * 1024;
-        private const int LocalCacheSize = 128 * 1024 * 1024;
+        private const int LocalCacheSize = 256 * 1024 * 1024;
 
         // How many calls to the same function we allow until we pad the shared cache to force the function to become available there
         // and allow the guest to take the fast path.