From e4f29899d22351711bb47256adf162064a367955 Mon Sep 17 00:00:00 2001
From: CamilleLaVey <camillelavey99@gmail.com>
Date: Wed, 29 Jul 2026 16:32:54 -0400
Subject: [PATCH] [TEST] Adjustment memory reclamation 2

---
 src/video_core/buffer_cache/buffer_cache.h        | 13 +++++++++++--
 src/video_core/buffer_cache/buffer_cache_base.h   |  5 ++++-
 src/video_core/texture_cache/texture_cache.h      | 13 +++++++++++--
 src/video_core/texture_cache/texture_cache_base.h |  3 ++-
 src/video_core/vulkan_common/vulkan_device.cpp    | 13 ++++++++++---
 5 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index dceb18f7b7..1907d52f55 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -80,13 +80,16 @@ u64 BufferCache<P>::ReclaimMemory(u64 target_bytes, bool allow_download) {
     const u64 cold_tick =
         frame_tick > RECLAIM_GUARD_FRAMES ? frame_tick - RECLAIM_GUARD_FRAMES : 0;
     lru_cache.ForEachItemBelow(cold_tick, clean_up);
-    if (freed < target_bytes) {
+    if (freed == 0) {
         lru_cache.ForEachItemBelow(frame_tick > 0 ? frame_tick - 1 : 0, clean_up);
     }
     sentenced_buffers.Reclaim(runtime.CompletedSyncPoint());
     in_reclaim = false;
     usage_refresh_countdown = 0;
     reclaim_stalled = freed == 0;
+    if (freed > 0) {
+        reclaim_wait_sync_point = runtime.CurrentSyncPoint();
+    }
     return freed;
 }
 
@@ -95,13 +98,19 @@ void BufferCache<P>::EnsureHeadroom(bool allow_download) {
     if (reclaim_stalled) {
         return;
     }
+    if (runtime.CompletedSyncPoint() < reclaim_wait_sync_point) {
+        return;
+    }
     const u64 limit = memory_budget > RECLAIM_HEADROOM ? memory_budget - RECLAIM_HEADROOM : 0;
     const u64 usage = DeviceUsage(false);
     if (usage <= limit) {
         return;
     }
     const u64 target = (limit / 100) * RECLAIM_TARGET_PERCENT;
-    ReclaimMemory((std::min)(usage - target, total_used_memory), allow_download);
+    const u64 excess = usage - target;
+    const u64 usage_mib = (std::max)(usage >> 20, u64{1});
+    const u64 share = (((excess >> 20) * (total_used_memory >> 20)) / usage_mib) << 20;
+    ReclaimMemory((std::min)(share, total_used_memory), allow_download);
 }
 
 template <class P>
diff --git a/src/video_core/buffer_cache/buffer_cache_base.h b/src/video_core/buffer_cache/buffer_cache_base.h
index 3422291441..f7f65f462e 100644
--- a/src/video_core/buffer_cache/buffer_cache_base.h
+++ b/src/video_core/buffer_cache/buffer_cache_base.h
@@ -191,7 +191,7 @@ class BufferCache : public VideoCommon::ChannelSetupCaches<BufferCacheChannelInf
     static constexpr u64 FALLBACK_MEMORY_BUDGET = 2_GiB;
     static constexpr u32 USAGE_REFRESH_INTERVAL = 16;
     static constexpr u64 RECLAIM_GUARD_FRAMES = 8;
-    static constexpr u64 RECLAIM_TARGET_PERCENT = 88;
+    static constexpr u64 RECLAIM_TARGET_PERCENT = 95;
 
     // Debug Flags.
 
@@ -519,6 +519,9 @@ private:
     u64 total_used_memory = 0;
     u64 memory_budget = 0;
     u64 cached_device_usage = 0;
+    /// Sync point the last reclaim's evictions were queued at. Their memory is not back with the
+    /// device until this completes, so reclaiming again before then measures stale usage.
+    u64 reclaim_wait_sync_point = 0;
     u32 usage_refresh_countdown = 0;
     bool in_reclaim = false;
     bool reclaim_stalled = false;
diff --git a/src/video_core/texture_cache/texture_cache.h b/src/video_core/texture_cache/texture_cache.h
index 78551fe1ae..9fc90b73bb 100644
--- a/src/video_core/texture_cache/texture_cache.h
+++ b/src/video_core/texture_cache/texture_cache.h
@@ -211,7 +211,7 @@ u64 TextureCache<P>::ReclaimMemory(u64 target_bytes, bool allow_download) {
     const u64 cold_tick =
         frame_tick > RECLAIM_GUARD_FRAMES ? frame_tick - RECLAIM_GUARD_FRAMES : 0;
     lru_cache.ForEachItemBelow(cold_tick, evict);
-    if (freed < target_bytes) {
+    if (freed == 0) {
         lru_cache.ForEachItemBelow(frame_tick > 0 ? frame_tick - 1 : 0, evict);
     }
     const u64 exit_point = runtime.CompletedSyncPoint();
@@ -221,6 +221,9 @@ u64 TextureCache<P>::ReclaimMemory(u64 target_bytes, bool allow_download) {
     in_reclaim = false;
     usage_refresh_countdown = 0;
     reclaim_stalled = freed == 0;
+    if (freed > 0) {
+        reclaim_wait_sync_point = runtime.CurrentSyncPoint();
+    }
     return freed;
 }
 
@@ -229,13 +232,19 @@ void TextureCache<P>::EnsureHeadroom(bool allow_download) {
     if (reclaim_stalled) {
         return;
     }
+    if (runtime.CompletedSyncPoint() < reclaim_wait_sync_point) {
+        return;
+    }
     const u64 limit = memory_budget > RECLAIM_HEADROOM ? memory_budget - RECLAIM_HEADROOM : 0;
     const u64 usage = DeviceUsage(false);
     if (usage <= limit) {
         return;
     }
     const u64 target = (limit / 100) * RECLAIM_TARGET_PERCENT;
-    ReclaimMemory((std::min)(usage - target, total_used_memory), allow_download);
+    const u64 excess = usage - target;
+    const u64 usage_mib = (std::max)(usage >> 20, u64{1});
+    const u64 share = (((excess >> 20) * (total_used_memory >> 20)) / usage_mib) << 20;
+    ReclaimMemory((std::min)(share, total_used_memory), allow_download);
 }
 
 template <class P>
diff --git a/src/video_core/texture_cache/texture_cache_base.h b/src/video_core/texture_cache/texture_cache_base.h
index f704c64196..93a6a36f45 100644
--- a/src/video_core/texture_cache/texture_cache_base.h
+++ b/src/video_core/texture_cache/texture_cache_base.h
@@ -121,7 +121,7 @@ class TextureCache : public VideoCommon::ChannelSetupCaches<TextureCacheChannelI
     static constexpr u64 FALLBACK_MEMORY_BUDGET = 2_GiB;
     static constexpr u32 USAGE_REFRESH_INTERVAL = 16;
     static constexpr u64 RECLAIM_GUARD_FRAMES = 8;
-    static constexpr u64 RECLAIM_TARGET_PERCENT = 88;
+    static constexpr u64 RECLAIM_TARGET_PERCENT = 95;
 
     using Runtime = typename P::Runtime;
     using Image = typename P::Image;
@@ -466,6 +466,7 @@ private:
     u64 total_used_memory = 0;
     u64 memory_budget = 0;
     u64 cached_device_usage = 0;
+    u64 reclaim_wait_sync_point = 0;
     u32 usage_refresh_countdown = 0;
     bool in_reclaim = false;
     bool reclaim_stalled = false;
diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index 4e8e23e6d2..85d41eb2a0 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -1544,9 +1544,16 @@ void Device::CollectPhysicalMemoryInfo() {
         device_access_memory += mem_properties.memoryHeaps[element].size;
     }
     if (is_integrated) {
-        const s64 available_memory = static_cast<s64>(device_access_memory - device_initial_usage);
-        const u64 memory_size = Settings::values.vram_usage_mode.GetValue() == Settings::VramUsageMode::Aggressive ? 6_GiB : 4_GiB;
-        device_access_memory = static_cast<u64>(std::max<s64>(std::min<s64>(available_memory - 8_GiB, memory_size), std::min<s64>(local_memory, memory_size)));
+        const bool aggressive =
+            Settings::values.vram_usage_mode.GetValue() == Settings::VramUsageMode::Aggressive;
+        const s64 available_memory =
+            static_cast<s64>(device_access_memory) - static_cast<s64>(device_initial_usage);
+        const u64 reserve = std::min<u64>(local_memory / 8, 1_GiB);
+        const u64 usable = available_memory > static_cast<s64>(reserve)
+                               ? static_cast<u64>(available_memory) - reserve
+                               : 0;
+        const u64 cap = (local_memory / 8) * (aggressive ? 6 : 5);
+        device_access_memory = std::max<u64>(std::min<u64>(usable, cap), 1_GiB);
     } else {
         const u64 reserve_memory = std::min<u64>(device_access_memory / 8, 1_GiB);
         device_access_memory -= reserve_memory;