bdc1f91a5b
This greatly reduces memory usage in games that aggressively reuse memory without removing dead textures from the pool, such as the Xenoblade games, UE3 games, and to a lesser extent, UE4/unity games. This change stops memory usage from ballooning in xenoblade and some other games. It will also reduce texture view/dependency complexity in some games - for example in MK8D it will reduce the number of surface copies between lighting cubemaps generated for actors. There shouldn't be any performance impact from doing this, though the deletion and creation of textures could be improved by improving the OpenGL texture storage cache, which is very simple and limited right now. This will be improved in future. Another potential error has been fixed with the texture cache, which could prevent data loss when data is interchangably written to textures from both the GPU and CPU. It was possible that the dirty flag for a texture would be consumed without the data being synchronized on next use, due to the old overlap check. This check no longer consumes the dirty flag. Please test a bunch of games to make sure they still work, and there are no performance regressions.
118 lines
3.8 KiB
C#
118 lines
3.8 KiB
C#
using Ryujinx.Common.Logging;
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using System.Collections;
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using System.Collections.Generic;
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namespace Ryujinx.Graphics.Gpu.Image
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{
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/// <summary>
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/// A texture cache that automatically removes older textures that are not used for some time.
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/// The cache works with a rotated list with a fixed size. When new textures are added, the
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/// old ones at the bottom of the list are deleted.
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/// </summary>
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class AutoDeleteCache : IEnumerable<Texture>
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{
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private const int MaxCapacity = 2048;
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private readonly LinkedList<Texture> _textures;
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/// <summary>
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/// Creates a new instance of the automatic deletion cache.
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/// </summary>
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public AutoDeleteCache()
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{
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_textures = new LinkedList<Texture>();
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}
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/// <summary>
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/// Adds a new texture to the cache, even if the texture added is already on the cache.
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/// </summary>
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/// <remarks>
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/// Using this method is only recommended if you know that the texture is not yet on the cache,
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/// otherwise it would store the same texture more than once.
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/// </remarks>
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/// <param name="texture">The texture to be added to the cache</param>
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public void Add(Texture texture)
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{
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texture.IncrementReferenceCount();
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texture.CacheNode = _textures.AddLast(texture);
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if (_textures.Count > MaxCapacity)
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{
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Texture oldestTexture = _textures.First.Value;
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oldestTexture.SynchronizeMemory();
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if (oldestTexture.IsModified && !oldestTexture.CheckModified(true))
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{
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// The texture must be flushed if it falls out of the auto delete cache.
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// Flushes out of the auto delete cache do not trigger write tracking,
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// as it is expected that other overlapping textures exist that have more up-to-date contents.
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oldestTexture.Flush(false);
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}
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_textures.RemoveFirst();
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oldestTexture.DecrementReferenceCount();
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oldestTexture.CacheNode = null;
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}
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}
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/// <summary>
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/// Adds a new texture to the cache, or just moves it to the top of the list if the
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/// texture is already on the cache.
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/// </summary>
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/// <remarks>
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/// Moving the texture to the top of the list prevents it from being deleted,
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/// as the textures on the bottom of the list are deleted when new ones are added.
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/// </remarks>
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/// <param name="texture">The texture to be added, or moved to the top</param>
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public void Lift(Texture texture)
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{
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if (texture.CacheNode != null)
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{
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if (texture.CacheNode != _textures.Last)
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{
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_textures.Remove(texture.CacheNode);
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texture.CacheNode = _textures.AddLast(texture);
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}
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}
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else
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{
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Add(texture);
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}
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}
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public bool Remove(Texture texture, bool flush)
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{
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if (texture.CacheNode == null)
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{
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return false;
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}
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// Remove our reference to this texture.
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if (flush && texture.IsModified)
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{
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texture.Flush(false);
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}
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_textures.Remove(texture.CacheNode);
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texture.CacheNode = null;
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return texture.DecrementReferenceCount();
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}
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public IEnumerator<Texture> GetEnumerator()
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{
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return _textures.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return _textures.GetEnumerator();
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}
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}
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} |