Configured the garbage collector for lower spikes (#88)

Did you know that the garbage collector's default settings are designed for single-threaded applications and quick start-up times? We don't care about either of these.

Configured:
- Concurrent GC (default is true) (set for clarity)
- RetainVM: segments that should be deleted are put on a standby list for future use (default is false)
- QuickJit: enabling quick JIT decreases startup time but can produce code with degraded performance characteristics; for example, the code may use more stack space, allocate more memory, and run slower. (default is true) (disabled)
- ReadyToRun: configures whether the .NET runtime uses pre-compiled code for images with available ReadyToRun data; disabling this option forces the runtime to JIT-compile framework code. (default is true) (set to false, we dont publish with this option anyway)
- TieredPGO: this setting enables dynamic (tiered) profile-guided optimization (PGO) in .NET 6 and later versions. If quick JIT is disabled but tiered compilation is enabled, only pre-compiled code participates in tiered compilation. If a method is not pre-compiled with ReadyToRun, the JIT behavior is the same as if tiered compilation were disabled.

Features:
- Set ``GCLatencyMode.Interactive`` when in-menu and emulator is paused, otherwise uses ``GCLatencyMode.LowLatency``.
- Added a new UI option in the Settings > CPU menu to toggle ``GCLatencyMode.LowLatency`` during guest runtime.

![image](/attachments/84ffc6c6-d92c-4ec5-8a95-9d72dc6f1b04)

Reviewed-on: https://git.ryujinx.app/projects/Ryubing/pulls/88

src/Ryujinx/Systems/AppHost.cs

@@ -46,6 +46,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
+using System.Runtime;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
@@ -579,6 +580,12 @@ namespace Ryujinx.Ava.Systems
         {
             _isActive = false;
             _playTimer.Stop();
+            
+            GCSettings.LatencyMode = GCLatencyMode.Interactive;
+            if (ConfigurationState.Instance.System.GCLowLatency)
+            {
+                Logger.Info?.Print(LogClass.Application, "Garbage collector set to interactive mode.");
+            }
         }
 
         private void Exit()
@@ -662,6 +669,12 @@ namespace Ryujinx.Ava.Systems
 
             _chrono.Stop();
             _playTimer.Stop();
+            
+            GCSettings.LatencyMode = GCLatencyMode.Interactive;
+            if (ConfigurationState.Instance.System.GCLowLatency)
+            {
+                Logger.Info?.Print(LogClass.Application, "Garbage collector set to interactive mode.");
+            }
         }
 
         public void DisposeGpu()
@@ -915,7 +928,14 @@ namespace Ryujinx.Ava.Systems
             ApplicationLibrary.LoadAndSaveMetaData(Device.Processes.ActiveApplication.ProgramIdText,
                 appMetadata => appMetadata.UpdatePreGame()
             );
+            
             _playTimer.Start();
+
+            if (ConfigurationState.Instance.System.GCLowLatency)
+            {
+                GCSettings.LatencyMode = GCLatencyMode.LowLatency;
+                Logger.Info?.Print(LogClass.Application, "Garbage collector set to low latency mode.");
+            }
         }
 
         internal void Resume()
@@ -926,6 +946,12 @@ namespace Ryujinx.Ava.Systems
             _playTimer.Start();
             _viewModel.Title = TitleHelper.ActiveApplicationTitle(Device?.Processes.ActiveApplication, Program.Version, !ConfigurationState.Instance.ShowOldUI);
             Logger.Info?.Print(LogClass.Emulation, "Emulation was resumed.");
+            
+            if (ConfigurationState.Instance.System.GCLowLatency)
+            {
+                GCSettings.LatencyMode = GCLatencyMode.LowLatency;
+                Logger.Info?.Print(LogClass.Application, "Garbage collector set to low latency mode.");
+            }
         }
 
         internal void Pause()
@@ -936,6 +962,12 @@ namespace Ryujinx.Ava.Systems
             _playTimer.Stop();
             _viewModel.Title = TitleHelper.ActiveApplicationTitle(Device?.Processes.ActiveApplication, Program.Version, !ConfigurationState.Instance.ShowOldUI, LocaleManager.Instance[LocaleKeys.Paused]);
             Logger.Info?.Print(LogClass.Emulation, "Emulation was paused.");
+            
+            GCSettings.LatencyMode = GCLatencyMode.Interactive;
+            if (ConfigurationState.Instance.System.GCLowLatency)
+            {
+                Logger.Info?.Print(LogClass.Application, "Garbage collector set to interactive mode.");
+            }
         }
 
         private void InitEmulatedSwitch()

src/Ryujinx/Systems/Configuration/ConfigurationFileFormat.cs

@@ -470,6 +470,11 @@ namespace Ryujinx.Ava.Systems.Configuration
         /// Uses Hypervisor over JIT if available
         /// </summary>
         public bool UseHypervisor { get; set; }
+        
+        /// <summary>
+        /// Enable or disable low-latency mode for garbage collection
+        /// </summary>
+        public bool GCLowLatency { get; set; }
 
         /// <summary>
         /// Enables or disables the GDB stub

src/Ryujinx/Systems/Configuration/ConfigurationState.Migration.cs

@@ -112,6 +112,7 @@ namespace Ryujinx.Ava.Systems.Configuration
             System.IgnoreControllerApplet.Value = cff.IgnoreApplet;
             System.SkipUserProfilesManager.Value = cff.SkipUserProfiles;
             System.UseHypervisor.Value = cff.UseHypervisor;
+            System.GCLowLatency.Value = cff.GCLowLatency;
 
             UI.GuiColumns.FavColumn.Value = shouldLoadFromFile ? cff.GuiColumns.FavColumn : UI.GuiColumns.FavColumn.Value;
             UI.GuiColumns.IconColumn.Value = shouldLoadFromFile ? cff.GuiColumns.IconColumn : UI.GuiColumns.IconColumn.Value;
@@ -535,7 +536,8 @@ namespace Ryujinx.Ava.Systems.Configuration
                 {
                     if (cff.AudioBackend is AudioBackend.SDL2)
                         cff.AudioBackend = AudioBackend.SDL3;
-                })
+                }),
+                (72, static cff => cff.GCLowLatency = false)
             );
     }
 }

src/Ryujinx/Systems/Configuration/ConfigurationState.Model.cs

@@ -417,6 +417,11 @@ namespace Ryujinx.Ava.Systems.Configuration
             /// Uses Hypervisor over JIT if available
             /// </summary>
             public ReactiveObject<bool> UseHypervisor { get; private set; }
+            
+            /// <summary>
+            /// Enable or disable low-latency garbage collection
+            /// </summary>
+            public ReactiveObject<bool> GCLowLatency { get; private set; }
 
             public SystemSection()
             {
@@ -471,6 +476,8 @@ namespace Ryujinx.Ava.Systems.Configuration
                 AudioVolume.LogChangesToValue(nameof(AudioVolume));
                 UseHypervisor = new ReactiveObject<bool>();
                 UseHypervisor.LogChangesToValue(nameof(UseHypervisor));
+                GCLowLatency = new ReactiveObject<bool>();
+                GCLowLatency.LogChangesToValue(nameof(GCLowLatency));
             }
         }
 

src/Ryujinx/Systems/Configuration/ConfigurationState.cs

@@ -87,6 +87,7 @@ namespace Ryujinx.Ava.Systems.Configuration
                 IgnoreApplet = System.IgnoreControllerApplet,
                 SkipUserProfiles = System.SkipUserProfilesManager,
                 UseHypervisor = System.UseHypervisor,
+                GCLowLatency = System.GCLowLatency,
                 GuiColumns = new GuiColumns
                 {
                     FavColumn = UI.GuiColumns.FavColumn,