Reaper: Tune it up to be an smart GC.

src/video_core/buffer_cache/buffer_cache.h

@@ -65,6 +65,9 @@ class BufferCache {
 
     static constexpr BufferId NULL_BUFFER_ID{0};
 
+    static constexpr u64 expected_memory = 512ULL * 1024ULL * 1024ULL;
+    static constexpr u64 critical_memory = 1024ULL * 1024ULL * 1024ULL;
+
     using Maxwell = Tegra::Engines::Maxwell3D::Regs;
 
     using Runtime = typename P::Runtime;
@@ -327,6 +330,7 @@ private:
 
     typename SlotVector<Buffer>::Iterator deletion_iterator;
     u64 frame_tick = 0;
+    u64 total_used_memory = 0;
 
     std::array<BufferId, ((1ULL << 39) >> PAGE_BITS)> page_table;
 };
@@ -346,6 +350,10 @@ BufferCache<P>::BufferCache(VideoCore::RasterizerInterface& rasterizer_,
 
 template <class P>
 void BufferCache<P>::TickFrame() {
+    SCOPE_EXIT({
+      ++frame_tick;
+      delayed_destruction_ring.Tick();
+    });
     // Calculate hits and shots and move hit bits to the right
     const u32 hits = std::reduce(uniform_cache_hits.begin(), uniform_cache_hits.end());
     const u32 shots = std::reduce(uniform_cache_shots.begin(), uniform_cache_shots.end());
@@ -359,8 +367,13 @@ void BufferCache<P>::TickFrame() {
     const bool skip_preferred = hits * 256 < shots * 251;
     uniform_buffer_skip_cache_size = skip_preferred ? DEFAULT_SKIP_CACHE_SIZE : 0;
 
-    static constexpr u64 ticks_to_destroy = 120;
-    int num_iterations = 32;
+    const bool activate_gc = total_used_memory >= expected_memory;
+    if (!activate_gc) {
+        return;
+    }
+    const bool agressive_gc = total_used_memory >= critical_memory;
+    const u64 ticks_to_destroy = agressive_gc ? 60 : 120;
+    int num_iterations = agressive_gc ? 64 : 32;
     for (; num_iterations > 0; --num_iterations) {
         if (deletion_iterator == slot_buffers.end()) {
             deletion_iterator = slot_buffers.begin();
@@ -375,8 +388,6 @@ void BufferCache<P>::TickFrame() {
             DeleteBuffer(buffer_id);
         }
     }
-    delayed_destruction_ring.Tick();
-    ++frame_tick;
 }
 
 template <class P>
@@ -1115,8 +1126,14 @@ template <class P>
 template <bool insert>
 void BufferCache<P>::ChangeRegister(BufferId buffer_id) {
     const Buffer& buffer = slot_buffers[buffer_id];
+    const auto size = buffer.SizeBytes();
+    if (insert) {
+        total_used_memory += Common::AlignUp(size, 1024);
+    } else {
+        total_used_memory -= Common::AlignUp(size, 1024);
+    }
     const VAddr cpu_addr_begin = buffer.CpuAddr();
-    const VAddr cpu_addr_end = cpu_addr_begin + buffer.SizeBytes();
+    const VAddr cpu_addr_end = cpu_addr_begin + size;
     const u64 page_begin = cpu_addr_begin / PAGE_SIZE;
     const u64 page_end = Common::DivCeil(cpu_addr_end, PAGE_SIZE);
     for (u64 page = page_begin; page != page_end; ++page) {

src/video_core/texture_cache/image_base.cpp

@@ -130,6 +130,26 @@ bool ImageBase::IsSafeDownload() const noexcept {
     return true;
 }
 
+void ImageBase::CheckBadOverlapState() {
+    if (False(flags & ImageFlagBits::BadOverlap)) {
+        return;
+    }
+    if (!overlapping_images.empty()) {
+        return;
+    }
+    flags &= ~ImageFlagBits::BadOverlap;
+}
+
+void ImageBase::CheckAliasState() {
+    if (False(flags & ImageFlagBits::Alias)) {
+        return;
+    }
+    if (!aliased_images.empty()) {
+        return;
+    }
+    flags &= ~ImageFlagBits::Alias;
+}
+
 void AddImageAlias(ImageBase& lhs, ImageBase& rhs, ImageId lhs_id, ImageId rhs_id) {
     static constexpr auto OPTIONS = RelaxedOptions::Size | RelaxedOptions::Format;
     ASSERT(lhs.info.type == rhs.info.type);

src/video_core/texture_cache/image_base.h

@@ -25,6 +25,12 @@ enum class ImageFlagBits : u32 {
     Strong = 1 << 5,      ///< Exists in the image table, the dimensions are can be trusted
     Registered = 1 << 6,  ///< True when the image is registered
     Picked = 1 << 7,      ///< Temporary flag to mark the image as picked
+
+    // Garbage Collection Flags
+    BadOverlap = 1 << 8,     ///< This image overlaps other but doesn't fit, has higher
+                             ///< garbage collection priority
+    Alias = 1 << 9,          ///< This image has aliases and has priority on garbage
+                             ///< collection
 };
 DECLARE_ENUM_FLAG_OPERATORS(ImageFlagBits)
 
@@ -51,6 +57,9 @@ struct ImageBase {
         return cpu_addr < overlap_end && overlap_cpu_addr < cpu_addr_end;
     }
 
+    void CheckBadOverlapState();
+    void CheckAliasState();
+
     ImageInfo info;
 
     u32 guest_size_bytes = 0;
@@ -74,6 +83,7 @@ struct ImageBase {
     std::vector<SubresourceBase> slice_subresources;
 
     std::vector<AliasedImage> aliased_images;
+    std::vector<ImageId> overlapping_images;
 };
 
 struct ImageAllocBase {

src/video_core/texture_cache/texture_cache.h

@@ -75,6 +75,9 @@ class TextureCache {
     /// Sampler ID for bugged sampler ids
     static constexpr SamplerId NULL_SAMPLER_ID{0};
 
+    static constexpr u64 expected_memory = 1024ULL * 1024ULL * 1024ULL;
+    static constexpr u64 critical_memory = 2 * 1024ULL * 1024ULL * 1024ULL;
+
     using Runtime = typename P::Runtime;
     using Image = typename P::Image;
     using ImageAlloc = typename P::ImageAlloc;
@@ -333,6 +336,7 @@ private:
     std::unordered_map<u64, std::vector<ImageId>, IdentityHash<u64>> page_table;
 
     bool has_deleted_images = false;
+    u64 total_used_memory = 0;
 
     SlotVector<Image> slot_images;
     SlotVector<ImageView> slot_image_views;
@@ -380,8 +384,10 @@ TextureCache<P>::TextureCache(Runtime& runtime_, VideoCore::RasterizerInterface&
 
 template <class P>
 void TextureCache<P>::TickFrame() {
-    static constexpr u64 ticks_to_destroy = 120;
-    int num_iterations = 32;
+    const bool high_priority_mode = total_used_memory >= expected_memory;
+    const bool aggressive_mode = total_used_memory >= critical_memory;
+    const u64 ticks_to_destroy = high_priority_mode ? 60 : 100;
+    int num_iterations = aggressive_mode ? 256 : (high_priority_mode ? 128 : 64);
     for (; num_iterations > 0; --num_iterations) {
         if (deletion_iterator == slot_images.end()) {
             deletion_iterator = slot_images.begin();
@@ -390,11 +396,42 @@ void TextureCache<P>::TickFrame() {
             }
         }
         const auto [image_id, image] = *deletion_iterator;
-        if (image->frame_tick + ticks_to_destroy < frame_tick) {
-            if (image->IsSafeDownload() &&
-                std::ranges::none_of(image->aliased_images, [&](const AliasedImage& alias) {
-                    return slot_images[alias.id].modification_tick > image->modification_tick;
-                })) {
+        const bool is_alias = True(image->flags & ImageFlagBits::Alias);
+        if (is_alias && image->aliased_images.size() <= 1) {
+            ++deletion_iterator;
+            continue;
+        }
+        const bool is_bad_overlap = True(image->flags & ImageFlagBits::BadOverlap);
+        const bool must_download = image->IsSafeDownload();
+        const u64 ticks_needed = is_bad_overlap ? ticks_to_destroy >> 4 : ticks_to_destroy;
+        const bool should_care =
+            aggressive_mode || is_bad_overlap || is_alias || (high_priority_mode && !must_download);
+        if (should_care && image->frame_tick + ticks_needed < frame_tick) {
+            if (is_bad_overlap) {
+                const bool overlap_check =
+                    std::ranges::all_of(image->overlapping_images, [&](const ImageId& overlap_id) {
+                        auto& overlap = slot_images[overlap_id];
+                        return (overlap.frame_tick >= image->frame_tick) &&
+                               (overlap.modification_tick > image->modification_tick);
+                    });
+                if (!overlap_check) {
+                    ++deletion_iterator;
+                    continue;
+                }
+            }
+            if (!is_bad_overlap && must_download) {
+                if (is_alias) {
+                    const bool alias_check =
+                        std::ranges::all_of(image->aliased_images, [&](const AliasedImage& alias) {
+                            auto& alias_image = slot_images[alias.id];
+                            return (alias_image.frame_tick >= image->frame_tick) &&
+                                   (alias_image.modification_tick > image->modification_tick);
+                        });
+                    if (!alias_check) {
+                        ++deletion_iterator;
+                        continue;
+                    }
+                }
                 auto map = runtime.DownloadStagingBuffer(image->unswizzled_size_bytes);
                 const auto copies = FullDownloadCopies(image->info);
                 image->DownloadMemory(map, copies);
@@ -406,10 +443,12 @@ void TextureCache<P>::TickFrame() {
             }
             UnregisterImage(image_id);
             DeleteImage(image_id);
+            if (is_bad_overlap) {
+                num_iterations++;
+            }
         }
         ++deletion_iterator;
     }
-    // Tick sentenced resources in this order to ensure they are destroyed in the right order
     sentenced_images.Tick();
     sentenced_framebuffers.Tick();
     sentenced_image_view.Tick();
@@ -989,6 +1028,7 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
     std::vector<ImageId> overlap_ids;
     std::vector<ImageId> left_aliased_ids;
     std::vector<ImageId> right_aliased_ids;
+    std::vector<ImageId> bad_overlap_ids;
     ForEachImageInRegion(cpu_addr, size_bytes, [&](ImageId overlap_id, ImageBase& overlap) {
         if (info.type != overlap.info.type) {
             return;
@@ -1014,9 +1054,14 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
         const ImageBase new_image_base(new_info, gpu_addr, cpu_addr);
         if (IsSubresource(new_info, overlap, gpu_addr, options, broken_views, native_bgr)) {
             left_aliased_ids.push_back(overlap_id);
+            overlap.flags |= ImageFlagBits::Alias;
         } else if (IsSubresource(overlap.info, new_image_base, overlap.gpu_addr, options,
                                  broken_views, native_bgr)) {
             right_aliased_ids.push_back(overlap_id);
+            overlap.flags |= ImageFlagBits::Alias;
+        } else {
+            bad_overlap_ids.push_back(overlap_id);
+            overlap.flags |= ImageFlagBits::BadOverlap;
         }
     });
     const ImageId new_image_id = slot_images.insert(runtime, new_info, gpu_addr, cpu_addr);
@@ -1044,10 +1089,18 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
     for (const ImageId aliased_id : right_aliased_ids) {
         ImageBase& aliased = slot_images[aliased_id];
         AddImageAlias(new_image_base, aliased, new_image_id, aliased_id);
+        new_image.flags |= ImageFlagBits::Alias;
     }
     for (const ImageId aliased_id : left_aliased_ids) {
         ImageBase& aliased = slot_images[aliased_id];
         AddImageAlias(aliased, new_image_base, aliased_id, new_image_id);
+        new_image.flags |= ImageFlagBits::Alias;
+    }
+    for (const ImageId aliased_id : bad_overlap_ids) {
+        ImageBase& aliased = slot_images[aliased_id];
+        aliased.overlapping_images.push_back(new_image_id);
+        new_image.overlapping_images.push_back(aliased_id);
+        new_image.flags |= ImageFlagBits::BadOverlap;
     }
     RegisterImage(new_image_id);
     return new_image_id;
@@ -1217,6 +1270,8 @@ void TextureCache<P>::RegisterImage(ImageId image_id) {
     image.flags |= ImageFlagBits::Registered;
     ForEachPage(image.cpu_addr, image.guest_size_bytes,
                 [this, image_id](u64 page) { page_table[page].push_back(image_id); });
+    total_used_memory +=
+        Common::AlignUp(std::max(image.guest_size_bytes, image.unswizzled_size_bytes), 1024);
 }
 
 template <class P>
@@ -1225,6 +1280,9 @@ void TextureCache<P>::UnregisterImage(ImageId image_id) {
     ASSERT_MSG(True(image.flags & ImageFlagBits::Registered),
                "Trying to unregister an already registered image");
     image.flags &= ~ImageFlagBits::Registered;
+    image.flags &= ~ImageFlagBits::BadOverlap;
+    total_used_memory -=
+        Common::AlignUp(std::max(image.guest_size_bytes, image.unswizzled_size_bytes), 1024);
     ForEachPage(image.cpu_addr, image.guest_size_bytes, [this, image_id](u64 page) {
         const auto page_it = page_table.find(page);
         if (page_it == page_table.end()) {
@@ -1298,9 +1356,19 @@ void TextureCache<P>::DeleteImage(ImageId image_id) {
             std::erase_if(other_image.aliased_images, [image_id](const AliasedImage& other_alias) {
                 return other_alias.id == image_id;
             });
+        other_image.CheckAliasState();
         ASSERT_MSG(num_removed_aliases == 1, "Invalid number of removed aliases: {}",
                    num_removed_aliases);
     }
+    for (const ImageId overlap_id : image.overlapping_images) {
+        ImageBase& other_image = slot_images[overlap_id];
+        [[maybe_unused]] const size_t num_removed_overlaps = std::erase_if(
+            other_image.overlapping_images,
+            [image_id](const ImageId other_overlap_id) { return other_overlap_id == image_id; });
+        other_image.CheckBadOverlapState();
+        ASSERT_MSG(num_removed_overlaps == 1, "Invalid number of removed overlapps: {}",
+                   num_removed_overlaps);
+    }
     for (const ImageViewId image_view_id : image_view_ids) {
         sentenced_image_view.Push(std::move(slot_image_views[image_view_id]));
         slot_image_views.erase(image_view_id);

src/video_core/texture_cache/util.cpp

@@ -581,6 +581,8 @@ void SwizzleBlockLinearImage(Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr
 
     for (s32 layer = 0; layer < info.resources.layers; ++layer) {
         const std::span<const u8> src = input.subspan(host_offset);
+        gpu_memory.ReadBlockUnsafe(gpu_addr + guest_offset, dst.data(), dst.size_bytes());
+
         SwizzleTexture(dst, src, bytes_per_block, num_tiles.width, num_tiles.height,
                        num_tiles.depth, block.height, block.depth);