Merge pull request #2177 from riperiperi/feature/parallel-shader-cache

Allow parallel shader compilation when loading a shader cache

Ryujinx.Common/GraphicsDriver/DriverUtilities.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace Ryujinx.Common.GraphicsDriver
+{
+    public static class DriverUtilities
+    {
+        public static void ToggleOGLThreading(bool enabled)
+        {
+            Environment.SetEnvironmentVariable("mesa_glthread", enabled.ToString());
+            Environment.SetEnvironmentVariable("__GL_THREADED_OPTIMIZATIONS", enabled ? "1" : "0");
+
+            try
+            {
+                NVThreadedOptimization.SetThreadedOptimization(enabled);
+            }
+            catch
+            {
+                // NVAPI is not available, or couldn't change the application profile.
+            }
+        }
+    }
+}

Ryujinx.Common/GraphicsDriver/NVAPI/Nvapi.cs

@@ -0,0 +1,11 @@
+namespace Ryujinx.Common.GraphicsDriver.NVAPI
+{
+    enum Nvapi : uint
+    {
+        OglThreadControlId = 0x20C1221E,
+
+        OglThreadControlDefault = 0,
+        OglThreadControlEnable = 1,
+        OglThreadControlDisable = 2
+    }
+}

Ryujinx.Common/GraphicsDriver/NVAPI/NvapiUnicodeString.cs

@@ -0,0 +1,42 @@
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Ryujinx.Common.GraphicsDriver.NVAPI
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 4)]
+    public unsafe struct NvapiUnicodeString
+    {
+        private fixed byte _data[4096];
+
+        public NvapiUnicodeString(string text)
+        {
+            Set(text);
+        }
+
+        public string Get()
+        {
+            fixed (byte* data = _data)
+            {
+                string text = Encoding.Unicode.GetString(data, 4096);
+
+                int index = text.IndexOf('\0');
+                if (index > -1)
+                {
+                    text = text.Remove(index);
+                }
+
+                return text;
+            }
+        }
+
+        public void Set(string text)
+        {
+            text += '\0';
+            fixed (char* textPtr = text)
+            fixed (byte* data = _data)
+            {
+                int written = Encoding.Unicode.GetBytes(textPtr, text.Length, data, 4096);
+            }
+        }
+    }
+}

Ryujinx.Common/GraphicsDriver/NVAPI/NvdrsApplicationV4.cs

@@ -0,0 +1,17 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Common.GraphicsDriver.NVAPI
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 4)]
+    unsafe struct NvdrsApplicationV4
+    {
+        public uint Version;
+        public uint IsPredefined;
+        public NvapiUnicodeString AppName;
+        public NvapiUnicodeString UserFriendlyName;
+        public NvapiUnicodeString Launcher;
+        public NvapiUnicodeString FileInFolder;
+        public uint Flags;
+        public NvapiUnicodeString CommandLine;
+    }
+}

Ryujinx.Common/GraphicsDriver/NVAPI/NvdrsProfile.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Common.GraphicsDriver.NVAPI
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    unsafe struct NvdrsProfile
+    {
+        public uint Version;
+        public NvapiUnicodeString ProfileName;
+        public uint GpuSupport;
+        public uint IsPredefined;
+        public uint NumOfApps;
+        public uint NumOfSettings;
+    }
+}

Ryujinx.Common/GraphicsDriver/NVAPI/NvdrsSetting.cs

@@ -0,0 +1,49 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Common.GraphicsDriver.NVAPI
+{
+    enum NvdrsSettingType : uint
+    {
+        NvdrsDwordType,
+        NvdrsBinaryType,
+        NvdrsStringType,
+        NvdrsWstringType,
+    }
+
+    enum NvdrsSettingLocation : uint
+    {
+        NvdrsCurrentProfileLocation,
+        NvdrsGlobalProfileLocation,
+        NvdrsBaseProfileLocation,
+        NvdrsDefaultProfileLocation,
+    }
+
+    [StructLayout(LayoutKind.Explicit, Size = 0x3020)]
+    unsafe struct NvdrsSetting
+    {
+        [FieldOffset(0x0)]
+        public uint Version;
+        [FieldOffset(0x4)]
+        public NvapiUnicodeString SettingName;
+        [FieldOffset(0x1004)]
+        public Nvapi SettingId;
+        [FieldOffset(0x1008)]
+        public NvdrsSettingType SettingType;
+        [FieldOffset(0x100C)]
+        public NvdrsSettingLocation SettingLocation;
+        [FieldOffset(0x1010)]
+        public uint IsCurrentPredefined;
+        [FieldOffset(0x1014)]
+        public uint IsPredefinedValid;
+
+        [FieldOffset(0x1018)]
+        public uint PredefinedValue;
+        [FieldOffset(0x1018)]
+        public NvapiUnicodeString PredefinedString;
+
+        [FieldOffset(0x201C)]
+        public uint CurrentValue;
+        [FieldOffset(0x201C)]
+        public NvapiUnicodeString CurrentString;
+    }
+}

Ryujinx.Common/GraphicsDriver/NVThreadedOptimization.cs

@@ -0,0 +1,163 @@
+using Ryujinx.Common.GraphicsDriver.NVAPI;
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Common.GraphicsDriver
+{
+    static class NVThreadedOptimization
+    {
+        private const string ProfileName = "Ryujinx Nvidia Profile";
+
+        private const uint NvAPI_Initialize_ID = 0x0150E828;
+        private const uint NvAPI_DRS_CreateSession_ID = 0x0694D52E;
+        private const uint NvAPI_DRS_LoadSettings_ID = 0x375DBD6B;
+        private const uint NvAPI_DRS_FindProfileByName_ID = 0x7E4A9A0B;
+        private const uint NvAPI_DRS_CreateProfile_ID = 0x0CC176068;
+        private const uint NvAPI_DRS_CreateApplication_ID = 0x4347A9DE;
+        private const uint NvAPI_DRS_SetSetting_ID = 0x577DD202;
+        private const uint NvAPI_DRS_SaveSettings_ID = 0xFCBC7E14;
+        private const uint NvAPI_DRS_DestroySession_ID = 0x0DAD9CFF8;
+
+        [DllImport("nvapi64")]
+        private static extern IntPtr nvapi_QueryInterface(uint id);
+
+        private delegate int NvAPI_InitializeDelegate();
+        private static NvAPI_InitializeDelegate NvAPI_Initialize;
+
+        private delegate int NvAPI_DRS_CreateSessionDelegate(out IntPtr handle);
+        private static NvAPI_DRS_CreateSessionDelegate NvAPI_DRS_CreateSession;
+
+        private delegate int NvAPI_DRS_LoadSettingsDelegate(IntPtr handle);
+        private static NvAPI_DRS_LoadSettingsDelegate NvAPI_DRS_LoadSettings;
+
+        private delegate int NvAPI_DRS_FindProfileByNameDelegate(IntPtr handle, NvapiUnicodeString profileName, out IntPtr profileHandle);
+        private static NvAPI_DRS_FindProfileByNameDelegate NvAPI_DRS_FindProfileByName;
+
+        private delegate int NvAPI_DRS_CreateProfileDelegate(IntPtr handle, ref NvdrsProfile profileInfo, out IntPtr profileHandle);
+        private static NvAPI_DRS_CreateProfileDelegate NvAPI_DRS_CreateProfile;
+
+        private delegate int NvAPI_DRS_CreateApplicationDelegate(IntPtr handle, IntPtr profileHandle, ref NvdrsApplicationV4 app);
+        private static NvAPI_DRS_CreateApplicationDelegate NvAPI_DRS_CreateApplication;
+
+        private delegate int NvAPI_DRS_SetSettingDelegate(IntPtr handle, IntPtr profileHandle, ref NvdrsSetting setting);
+        private static NvAPI_DRS_SetSettingDelegate NvAPI_DRS_SetSetting;
+
+        private delegate int NvAPI_DRS_SaveSettingsDelegate(IntPtr handle);
+        private static NvAPI_DRS_SaveSettingsDelegate NvAPI_DRS_SaveSettings;
+
+        private delegate int NvAPI_DRS_DestroySessionDelegate(IntPtr handle);
+        private static NvAPI_DRS_DestroySessionDelegate NvAPI_DRS_DestroySession;
+
+        private static bool _initialized;
+
+        private static void Check(int status)
+        {
+            if (status != 0)
+            {
+                throw new Exception($"NVAPI Error: {status}");
+            }
+        }
+
+        private static void Initialize()
+        {
+            if (!_initialized)
+            {
+                NvAPI_Initialize = NvAPI_Delegate<NvAPI_InitializeDelegate>(NvAPI_Initialize_ID);
+
+                Check(NvAPI_Initialize());
+
+                NvAPI_DRS_CreateSession = NvAPI_Delegate<NvAPI_DRS_CreateSessionDelegate>(NvAPI_DRS_CreateSession_ID);
+                NvAPI_DRS_LoadSettings = NvAPI_Delegate<NvAPI_DRS_LoadSettingsDelegate>(NvAPI_DRS_LoadSettings_ID);
+                NvAPI_DRS_FindProfileByName = NvAPI_Delegate<NvAPI_DRS_FindProfileByNameDelegate>(NvAPI_DRS_FindProfileByName_ID);
+                NvAPI_DRS_CreateProfile = NvAPI_Delegate<NvAPI_DRS_CreateProfileDelegate>(NvAPI_DRS_CreateProfile_ID);
+                NvAPI_DRS_CreateApplication = NvAPI_Delegate<NvAPI_DRS_CreateApplicationDelegate>(NvAPI_DRS_CreateApplication_ID);
+                NvAPI_DRS_SetSetting = NvAPI_Delegate<NvAPI_DRS_SetSettingDelegate>(NvAPI_DRS_SetSetting_ID);
+                NvAPI_DRS_SaveSettings = NvAPI_Delegate<NvAPI_DRS_SaveSettingsDelegate>(NvAPI_DRS_SaveSettings_ID);
+                NvAPI_DRS_DestroySession = NvAPI_Delegate<NvAPI_DRS_DestroySessionDelegate>(NvAPI_DRS_DestroySession_ID);
+
+                _initialized = true;
+            }
+        }
+
+        private static uint MakeVersion<T>(uint version) where T : unmanaged
+        {
+            return (uint)Unsafe.SizeOf<T>() | version << 16;
+        }
+
+        public static void SetThreadedOptimization(bool enabled)
+        {
+            Initialize();
+
+            uint targetValue = (uint)(enabled ? Nvapi.OglThreadControlEnable : Nvapi.OglThreadControlDisable);
+
+            Check(NvAPI_Initialize());
+
+            Check(NvAPI_DRS_CreateSession(out IntPtr handle));
+
+            Check(NvAPI_DRS_LoadSettings(handle));
+
+            IntPtr profileHandle;
+
+            // Check if the profile already exists.
+
+            int status = NvAPI_DRS_FindProfileByName(handle, new NvapiUnicodeString(ProfileName), out profileHandle);
+
+            if (status != 0)
+            {
+                NvdrsProfile profile = new NvdrsProfile { 
+                    Version = MakeVersion<NvdrsProfile>(1), 
+                    IsPredefined = 0, 
+                    GpuSupport = uint.MaxValue 
+                };
+                profile.ProfileName.Set(ProfileName);
+                Check(NvAPI_DRS_CreateProfile(handle, ref profile, out profileHandle));
+
+                NvdrsApplicationV4 application = new NvdrsApplicationV4
+                {
+                    Version = MakeVersion<NvdrsApplicationV4>(4),
+                    IsPredefined = 0,
+                    Flags = 3 // IsMetro, IsCommandLine
+                };
+                application.AppName.Set("Ryujinx.exe");
+                application.UserFriendlyName.Set("Ryujinx");
+                application.Launcher.Set("");
+                application.FileInFolder.Set("");
+
+                Check(NvAPI_DRS_CreateApplication(handle, profileHandle, ref application));
+            }
+
+            NvdrsSetting setting = new NvdrsSetting
+            {
+                Version = MakeVersion<NvdrsSetting>(1),
+                SettingId = Nvapi.OglThreadControlId,
+                SettingType = NvdrsSettingType.NvdrsDwordType,
+                SettingLocation = NvdrsSettingLocation.NvdrsCurrentProfileLocation,
+                IsCurrentPredefined = 0,
+                IsPredefinedValid = 0,
+                CurrentValue = targetValue,
+                PredefinedValue = targetValue
+            };
+
+            Check(NvAPI_DRS_SetSetting(handle, profileHandle, ref setting));
+
+            Check(NvAPI_DRS_SaveSettings(handle));
+
+            NvAPI_DRS_DestroySession(handle);
+        }
+
+        private static T NvAPI_Delegate<T>(uint id) where T : class
+        {
+            IntPtr ptr = nvapi_QueryInterface(id);
+
+            if (ptr != IntPtr.Zero)
+            {
+                return Marshal.GetDelegateForFunctionPointer(ptr, typeof(T)) as T;
+            }
+            else
+            {
+                return null;
+            }
+        }
+    }
+}

Ryujinx.Common/System/ForceDedicatedGpu.cs

@@ -1,16 +0,0 @@
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Common.System
-{
-    public static class ForceDedicatedGpu
-    {
-        public static void Nvidia()
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                // NOTE: If the DLL exists, we can load it to force the usage of the dedicated Nvidia Gpu.
-                NativeLibrary.TryLoad("nvapi64.dll", out _);
-            }
-        }
-    }
-}

Ryujinx.Graphics.GAL/IProgram.cs

@@ -4,6 +4,8 @@ namespace Ryujinx.Graphics.GAL
 {
     public interface IProgram : IDisposable
     {
+        ProgramLinkStatus CheckProgramLink(bool blocking);
+
         byte[] GetBinary();
     }
 }

Ryujinx.Graphics.GAL/ProgramLinkStatus.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.Graphics.GAL
+{
+    public enum ProgramLinkStatus
+    {
+        Incomplete,
+        Success,
+        Failure
+    }
+}

Ryujinx.Graphics.Gpu/Shader/ShaderCache.cs

@@ -10,6 +10,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Threading;
+using System.Threading.Tasks;
 
 namespace Ryujinx.Graphics.Gpu.Shader
 {
@@ -102,8 +103,23 @@ namespace Ryujinx.Graphics.Gpu.Shader
                     progressReportThread.Start(progressReportEvent);
                 }
 
-                for (int programIndex = 0; programIndex < guestProgramList.Length; programIndex++)
+                // Make sure these are initialized before doing compilation.
+                Capabilities caps = _context.Capabilities;
+
+                int maxTaskCount = Math.Min(Environment.ProcessorCount, 8);
+                int programIndex = 0;
+                List<ShaderCompileTask> activeTasks = new List<ShaderCompileTask>();
+
+                AutoResetEvent taskDoneEvent = new AutoResetEvent(false);
+
+                // This thread dispatches tasks to do shader translation, and creates programs that OpenGL will link in the background.
+                // The program link status is checked in a non-blocking manner so that multiple shaders can be compiled at once.
+
+                while (programIndex < guestProgramList.Length || activeTasks.Count > 0)
                 {
+                    if (activeTasks.Count < maxTaskCount && programIndex < guestProgramList.Length)
+                    {
+                        // Begin a new shader compilation.
                         Hash128 key = guestProgramList[programIndex];
 
                         byte[] hostProgramBinary = _cacheManager.GetHostProgramByHash(ref key);
@@ -121,6 +137,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
                             // Should not happen, but if someone messed with the cache it's better to catch it.
                             invalidEntries?.Add(key);
 
+                            _shaderCount = ++programIndex;
+
                             continue;
                         }
 
@@ -144,35 +162,50 @@ namespace Ryujinx.Graphics.Gpu.Shader
                                 hostProgram = _context.Renderer.LoadProgramBinary(hostProgramBinary);
                             }
 
-                        bool isHostProgramValid = hostProgram != null;
+                            ShaderCompileTask task = new ShaderCompileTask(taskDoneEvent);
+                            activeTasks.Add(task);
 
-                        ShaderProgram program;
+                            task.OnCompiled(hostProgram, (bool isHostProgramValid, ShaderCompileTask task) =>
-                        ShaderProgramInfo shaderProgramInfo;
+                            {
+                                ShaderProgram program = null;
+                                ShaderProgramInfo shaderProgramInfo = null;
 
-                        // Reconstruct code holder.
                                 if (isHostProgramValid)
                                 {
+                                    // Reconstruct code holder.
+
                                     program = new ShaderProgram(entry.Header.Stage, "");
                                     shaderProgramInfo = hostShaderEntries[0].ToShaderProgramInfo();
+
+                                    ShaderCodeHolder shader = new ShaderCodeHolder(program, shaderProgramInfo, entry.Code);
+
+                                    _cpProgramsDiskCache.Add(key, new ShaderBundle(hostProgram, shader));
+
+                                    return true;
                                 }
                                 else
+                                {
+                                    // If the host program was rejected by the gpu driver or isn't in cache, try to build from program sources again.
+
+                                    Task compileTask = Task.Run(() =>
                                     {
                                         IGpuAccessor gpuAccessor = new CachedGpuAccessor(_context, entry.Code, entry.Header.GpuAccessorHeader, entry.TextureDescriptors);
 
                                         program = Translator.CreateContext(0, gpuAccessor, DefaultFlags | TranslationFlags.Compute).Translate(out shaderProgramInfo);
-                        }
+                                    });
 
+                                    task.OnTask(compileTask, (bool _, ShaderCompileTask task) =>
+                                    {
                                         ShaderCodeHolder shader = new ShaderCodeHolder(program, shaderProgramInfo, entry.Code);
 
-                        // If the host program was rejected by the gpu driver or isn't in cache, try to build from program sources again.
-                        if (hostProgram == null)
-                        {
                                         Logger.Info?.Print(LogClass.Gpu, $"Host shader {key} got invalidated, rebuilding from guest...");
 
                                         // Compile shader and create program as the shader program binary got invalidated.
                                         shader.HostShader = _context.Renderer.CompileShader(ShaderStage.Compute, shader.Program.Code);
                                         hostProgram = _context.Renderer.CreateProgram(new IShader[] { shader.HostShader }, null);
 
+                                        task.OnCompiled(hostProgram, (bool isNewProgramValid, ShaderCompileTask task) =>
+                                        {
                                             // As the host program was invalidated, save the new entry in the cache.
                                             hostProgramBinary = HostShaderCacheEntry.Create(hostProgram.GetBinary(), new ShaderCodeHolder[] { shader });
 
@@ -189,9 +222,18 @@ namespace Ryujinx.Graphics.Gpu.Shader
                                                     _cacheManager.AddHostProgram(ref key, hostProgramBinary);
                                                 }
                                             }
-                        }
 
                                             _cpProgramsDiskCache.Add(key, new ShaderBundle(hostProgram, shader));
+
+                                            return true;
+                                        });
+
+                                        return false; // Not finished: still need to compile the host program.
+                                    });
+
+                                    return false; // Not finished: translating the program.
+                                }
+                            });
                         }
                         else
                         {
@@ -221,12 +263,19 @@ namespace Ryujinx.Graphics.Gpu.Shader
                                 hostProgram = _context.Renderer.LoadProgramBinary(hostProgramBinary);
                             }
 
-                        bool isHostProgramValid = hostProgram != null;
+                            ShaderCompileTask task = new ShaderCompileTask(taskDoneEvent);
+                            activeTasks.Add(task);
 
-                        // Reconstruct code holder.
+                            GuestShaderCacheEntry[] entries = cachedShaderEntries.ToArray();
-                        for (int i = 0; i < cachedShaderEntries.Length; i++)
+
+                            task.OnCompiled(hostProgram, (bool isHostProgramValid, ShaderCompileTask task) =>
                             {
-                            GuestShaderCacheEntry entry = cachedShaderEntries[i];
+                                Task compileTask = Task.Run(() =>
+                                {
+                                    // Reconstruct code holder.
+                                    for (int i = 0; i < entries.Length; i++)
+                                    {
+                                        GuestShaderCacheEntry entry = entries[i];
 
                                         if (entry == null)
                                         {
@@ -281,7 +330,10 @@ namespace Ryujinx.Graphics.Gpu.Shader
 
                                         shaderPrograms.Add(program);
                                     }
+                                });
 
+                                task.OnTask(compileTask, (bool _, ShaderCompileTask task) =>
+                                {
                                     // If the host program was rejected by the gpu driver or isn't in cache, try to build from program sources again.
                                     if (!isHostProgramValid)
                                     {
@@ -308,6 +360,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
 
                                         hostProgram = _context.Renderer.CreateProgram(hostShaders.ToArray(), tfd);
 
+                                        task.OnCompiled(hostProgram, (bool isNewProgramValid, ShaderCompileTask task) =>
+                                        {
                                             // As the host program was invalidated, save the new entry in the cache.
                                             hostProgramBinary = HostShaderCacheEntry.Create(hostProgram.GetBinary(), shaders);
 
@@ -324,12 +378,48 @@ namespace Ryujinx.Graphics.Gpu.Shader
                                                     _cacheManager.AddHostProgram(ref key, hostProgramBinary);
                                                 }
                                             }
-                        }
 
                                             _gpProgramsDiskCache.Add(key, new ShaderBundle(hostProgram, shaders));
+
+                                            return true;
+                                        });
+
+                                        return false; // Not finished: still need to compile the host program.
+                                    }
+                                    else
+                                    {
+                                        _gpProgramsDiskCache.Add(key, new ShaderBundle(hostProgram, shaders));
+
+                                        return true;
+                                    }
+                                });
+
+                                return false; // Not finished: translating the program.
+                            });
                         }
 
-                    _shaderCount = programIndex + 1;
+                        _shaderCount = ++programIndex;
+                    }
+
+                    // Process the queue.
+                    for (int i = 0; i < activeTasks.Count; i++)
+                    {
+                        ShaderCompileTask task = activeTasks[i];
+
+                        if (task.IsDone())
+                        {
+                            activeTasks.RemoveAt(i--);
+                        }
+                    }
+
+                    if (activeTasks.Count == maxTaskCount)
+                    {
+                        // Wait for a task to be done, or for 1ms.
+                        // Host shader compilation cannot signal when it is done, 
+                        // so the 1ms timeout is required to poll status.
+
+                        taskDoneEvent.WaitOne(1);
+                    }
                 }
 
                 if (!isReadOnly)
@@ -458,6 +548,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
 
                 IProgram hostProgram = _context.Renderer.CreateProgram(new IShader[] { shader.HostShader }, null);
 
+                hostProgram.CheckProgramLink(true);
+
                 byte[] hostProgramBinary = HostShaderCacheEntry.Create(hostProgram.GetBinary(), new ShaderCodeHolder[] { shader });
 
                 cpShader = new ShaderBundle(hostProgram, shader);
@@ -598,6 +690,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
 
                 IProgram hostProgram = _context.Renderer.CreateProgram(hostShaders.ToArray(), tfd);
 
+                hostProgram.CheckProgramLink(true);
+
                 byte[] hostProgramBinary = HostShaderCacheEntry.Create(hostProgram.GetBinary(), shaders);
 
                 gpShaders = new ShaderBundle(hostProgram, shaders);

Ryujinx.Graphics.Gpu/Shader/ShaderCompileTask.cs

@@ -0,0 +1,94 @@
+using Ryujinx.Graphics.GAL;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.Graphics.Gpu.Shader
+{
+    delegate bool ShaderCompileTaskCallback(bool success, ShaderCompileTask task);
+
+    /// <summary>
+    /// A class that represents a shader compilation.
+    /// </summary>
+    class ShaderCompileTask
+    {
+        private bool _compiling;
+
+        private Task _programsTask;
+        private IProgram _program;
+
+        private ShaderCompileTaskCallback _action;
+        private AutoResetEvent _taskDoneEvent;
+
+        /// <summary>
+        /// Create a new shader compile task, with an event to signal whenever a subtask completes.
+        /// </summary>
+        /// <param name="taskDoneEvent">Event to signal when a subtask completes</param>
+        public ShaderCompileTask(AutoResetEvent taskDoneEvent)
+        {
+            _taskDoneEvent = taskDoneEvent;
+        }
+
+        /// <summary>
+        /// Check the completion status of the shader compile task, and run callbacks on step completion.
+        /// Calling this periodically is required to progress through steps of the compilation.
+        /// </summary>
+        /// <returns>True if the task is complete, false if it is in progress</returns>
+        public bool IsDone()
+        {
+            if (_compiling)
+            {
+                ProgramLinkStatus status = _program.CheckProgramLink(false);
+
+                if (status != ProgramLinkStatus.Incomplete)
+                {
+                    return _action(status == ProgramLinkStatus.Success, this);
+                }
+            }
+            else
+            {
+                // Waiting on the task.
+
+                if (_programsTask.IsCompleted)
+                {
+                    return _action(true, this);
+                }
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Run a callback when the specified task has completed.
+        /// </summary>
+        /// <param name="task">The task object that needs to complete</param>
+        /// <param name="action">The action to perform when it is complete</param>
+        public void OnTask(Task task, ShaderCompileTaskCallback action)
+        {
+            _compiling = false;
+
+            _programsTask = task;
+            _action = action;
+
+            task.ContinueWith(task => _taskDoneEvent.Set());
+        }
+
+        /// <summary>
+        /// Run a callback when the specified program has been linked.
+        /// </summary>
+        /// <param name="task">The program that needs to be linked</param>
+        /// <param name="action">The action to perform when linking is complete</param>
+        public void OnCompiled(IProgram program, ShaderCompileTaskCallback action)
+        {
+            _compiling = true;
+
+            _program = program;
+            _action = action;
+
+            if (program == null)
+            {
+                action(false, this);
+            }
+        }
+    }
+}

Ryujinx.Graphics.OpenGL/HwCapabilities.cs

@@ -10,6 +10,7 @@ namespace Ryujinx.Graphics.OpenGL
         private static readonly Lazy<bool> _supportsPolygonOffsetClamp        = new Lazy<bool>(() => HasExtension("GL_EXT_polygon_offset_clamp"));
         private static readonly Lazy<bool> _supportsViewportSwizzle           = new Lazy<bool>(() => HasExtension("GL_NV_viewport_swizzle"));
         private static readonly Lazy<bool> _supportsSeamlessCubemapPerTexture = new Lazy<bool>(() => HasExtension("GL_ARB_seamless_cubemap_per_texture"));
+        private static readonly Lazy<bool> _supportsParallelShaderCompile     = new Lazy<bool>(() => HasExtension("GL_ARB_parallel_shader_compile"));
 
         private static readonly Lazy<int> _maximumComputeSharedMemorySize = new Lazy<int>(() => GetLimit(All.MaxComputeSharedMemorySize));
         private static readonly Lazy<int> _storageBufferOffsetAlignment   = new Lazy<int>(() => GetLimit(All.ShaderStorageBufferOffsetAlignment));
@@ -34,6 +35,7 @@ namespace Ryujinx.Graphics.OpenGL
         public static bool SupportsPolygonOffsetClamp        => _supportsPolygonOffsetClamp.Value;
         public static bool SupportsViewportSwizzle           => _supportsViewportSwizzle.Value;
         public static bool SupportsSeamlessCubemapPerTexture => _supportsSeamlessCubemapPerTexture.Value;
+        public static bool SupportsParallelShaderCompile     => _supportsParallelShaderCompile.Value;
         public static bool SupportsNonConstantTextureOffset  => _gpuVendor.Value == GpuVendor.Nvidia;
         public static bool RequiresSyncFlush                 => _gpuVendor.Value == GpuVendor.Amd || _gpuVendor.Value == GpuVendor.IntelWindows || _gpuVendor.Value == GpuVendor.IntelUnix;
         public static bool SupportsMismatchingViewFormat     => _gpuVendor.Value != GpuVendor.Amd && _gpuVendor.Value != GpuVendor.IntelWindows;

Ryujinx.Graphics.OpenGL/Program.cs

@@ -13,11 +13,26 @@ namespace Ryujinx.Graphics.OpenGL
     {
         public int Handle { get; private set; }
 
-        public int FragmentIsBgraUniform { get; }
+        public int FragmentIsBgraUniform { get; private set; }
-        public int FragmentRenderScaleUniform { get; }
+        public int FragmentRenderScaleUniform { get; private set; }
-        public int ComputeRenderScaleUniform { get; }
+        public int ComputeRenderScaleUniform { get; private set; }
 
-        public bool IsLinked { get; private set; }
+        public bool IsLinked
+        {
+            get
+            {
+                if (_status == ProgramLinkStatus.Incomplete)
+                {
+                    CheckProgramLink(true);
+                }
+
+                return _status == ProgramLinkStatus.Success;
+            }
+        }
+
+        private bool _initialized;
+        private ProgramLinkStatus _status = ProgramLinkStatus.Incomplete;
+        private IShader[] _shaders;
 
         public Program(IShader[] shaders, TransformFeedbackDescriptor[] transformFeedbackDescriptors)
         {
@@ -82,18 +97,7 @@ namespace Ryujinx.Graphics.OpenGL
 
             GL.LinkProgram(Handle);
 
-            for (int index = 0; index < shaders.Length; index++)
+            _shaders = shaders;
-            {
-                int shaderHandle = ((Shader)shaders[index]).Handle;
-
-                GL.DetachShader(Handle, shaderHandle);
-            }
-
-            CheckProgramLink();
-
-            FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
-            FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
-            ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
         }
 
         public Program(ReadOnlySpan<byte> code)
@@ -109,32 +113,60 @@ namespace Ryujinx.Graphics.OpenGL
                     GL.ProgramBinary(Handle, binaryFormat, (IntPtr)ptr, code.Length - 4);
                 }
             }
-
-            CheckProgramLink();
-
-            FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
-            FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
-            ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
         }
 
         public void Bind()
         {
+            if (!_initialized)
+            {
+                FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
+                FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
+                ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
+
+                _initialized = true;
+            }
+
             GL.UseProgram(Handle);
         }
 
-        private void CheckProgramLink()
+        public ProgramLinkStatus CheckProgramLink(bool blocking)
         {
+            if (!blocking && HwCapabilities.SupportsParallelShaderCompile)
+            {
+                GL.GetProgram(Handle, (GetProgramParameterName)ArbParallelShaderCompile.CompletionStatusArb, out int completed);
+
+                if (completed == 0)
+                {
+                    return ProgramLinkStatus.Incomplete;
+                }
+            }
+
             GL.GetProgram(Handle, GetProgramParameterName.LinkStatus, out int status);
 
+            if (_shaders != null)
+            {
+                for (int index = 0; index < _shaders.Length; index++)
+                {
+                    int shaderHandle = ((Shader)_shaders[index]).Handle;
+
+                    GL.DetachShader(Handle, shaderHandle);
+                }
+
+                _shaders = null;
+            }
+
             if (status == 0)
             {
                 // Use GL.GetProgramInfoLog(Handle), it may be too long to print on the log.
+                _status = ProgramLinkStatus.Failure;
                 Logger.Debug?.Print(LogClass.Gpu, "Shader linking failed.");
             }
             else
             {
-                IsLinked = true;
+                _status = ProgramLinkStatus.Success;
             }
+
+            return _status;
         }
 
         public byte[] GetBinary()

Ryujinx.Graphics.OpenGL/Renderer.cs

@@ -131,6 +131,11 @@ namespace Ryujinx.Graphics.OpenGL
 
             PrintGpuInformation();
 
+            if (HwCapabilities.SupportsParallelShaderCompile)
+            {
+                GL.Arb.MaxShaderCompilerThreads(Math.Min(Environment.ProcessorCount, 8));
+            }
+
             _counters.Initialize();
         }
 
@@ -178,16 +183,7 @@ namespace Ryujinx.Graphics.OpenGL
 
         public IProgram LoadProgramBinary(byte[] programBinary)
         {
-            Program program = new Program(programBinary);
+            return new Program(programBinary);
-
-            if (program.IsLinked)
-            {
-                return program;
-            }
-
-            program.Dispose();
-
-            return null;
         }
 
         public void CreateSync(ulong id)

Ryujinx/Program.cs

@@ -2,6 +2,7 @@ using ARMeilleure.Translation.PTC;
 using FFmpeg.AutoGen;
 using Gtk;
 using Ryujinx.Common.Configuration;
+using Ryujinx.Common.GraphicsDriver;
 using Ryujinx.Common.Logging;
 using Ryujinx.Common.System;
 using Ryujinx.Common.SystemInfo;
@@ -147,6 +148,9 @@ namespace Ryujinx
             // Logging system information.
             PrintSystemInfo();
 
+            // Enable OGL multithreading on the driver, when available.
+            DriverUtilities.ToggleOGLThreading(true);
+
             // Initialize Gtk.
             Application.Init();
 
@@ -158,9 +162,6 @@ namespace Ryujinx
                 UserErrorDialog.CreateUserErrorDialog(UserError.NoKeys);
             }
 
-            // Force dedicated GPU if we can.
-            ForceDedicatedGpu.Nvidia();
-
             // Show the main window UI.
             MainWindow mainWindow = new MainWindow();
             mainWindow.Show();