texture_cache: collect images in the emptiest device memory blocks first

Deleting by age alone left every block partly used: the collector deletes
thousands of images a minute and new ones land in the holes, so blocks
seldom empty (title 1: ~0.8 GB of holes in ~190 32 MiB blocks after ten
minutes, counted by the driver as used). Among the oldest candidates, 8
per image a pass may delete, those in the emptiest blocks go first, so
blocks drain and VMA returns them; placement already prefers the fullest
blocks.

(cherry picked from commit 2f8f0716fafd874cfbb3cc9086141aea61aff2df)

1 files changed, 9 insertions, 0 deletions

diff --git a/src/video_core/vulkan_common/vulkan_wrapper.h b/src/video_core/vulkan_common/vulkan_wrapper.h
index f9b3cc15df..f49e9518bb 100644
--- a/src/video_core/vulkan_common/vulkan_wrapper.h
+++ b/src/video_core/vulkan_common/vulkan_wrapper.h
@@ -737,6 +737,15 @@ public:
         return usage;
     }
 
+    /// Where the image's memory lies: the block (0 when the image has no memory or a block of
+    /// its own), the block's size and the image's part of it.
+    struct MemoryBlock {
+        u64 block;
+        u64 block_size;
+        u64 size;
+    };
+    [[nodiscard]] MemoryBlock GetMemoryBlock() const noexcept;
+
 private:
     void Release() const noexcept;