From 941520d2819e500e89ecffca703935d2cc509297 Mon Sep 17 00:00:00 2001
From: lizzie <lizzie@eden-emu.dev>
Date: Sat, 29 Nov 2025 04:13:04 +0000
Subject: [PATCH] [vk] Add option to force smaller buffers This can fix some
 games which run out of memory (Smash bros ultimate with 6 G&W) due to recent
 VMA changes

Signed-off-by: lizzie <lizzie@eden-emu.dev>
---
 src/common/settings.h                         | 22 +++++++++++++++++++
 src/qt_common/config/shared_translation.cpp   |  4 ++++
 .../renderer_vulkan/vk_query_cache.cpp        |  5 ++++-
 .../vk_staging_buffer_pool.cpp                |  3 ++-
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/common/settings.h b/src/common/settings.h
index d5bf9f7660..1f8cf7d309 100644
--- a/src/common/settings.h
+++ b/src/common/settings.h
@@ -478,6 +478,28 @@ struct Values {
                                                   "use_reactive_flushing",
                                                   Category::RendererAdvanced};
 
+    SwitchableSetting<GpuOverclock> fast_gpu_time{linkage,
+                                                  GpuOverclock::Low,
+                                                  "fast_gpu_time",
+                                                  Category::RendererAdvanced,
+                                                  Specialization::Default,
+                                                  true,
+                                                  true,
+                                                  &use_fast_gpu_time};
+
+    SwitchableSetting<bool> use_vulkan_driver_pipeline_cache{linkage,
+                                                             true,
+                                                             "use_vulkan_driver_pipeline_cache",
+                                                             Category::RendererAdvanced,
+                                                             Specialization::Default,
+                                                             true,
+                                                             true};
+    SwitchableSetting<bool> enable_compute_pipelines{linkage, false, "enable_compute_pipelines",
+                                                     Category::RendererAdvanced};
+    SwitchableSetting<bool> use_video_framerate{linkage, false, "use_video_framerate",
+                                                Category::RendererAdvanced};
+    SwitchableSetting<bool> force_smaller_buffers{linkage, false, "force_smaller_buffers",
+                                                Category::RendererAdvanced};
     SwitchableSetting<bool> barrier_feedback_loops{linkage, true, "barrier_feedback_loops",
                                                    Category::RendererAdvanced};
 
diff --git a/src/qt_common/config/shared_translation.cpp b/src/qt_common/config/shared_translation.cpp
index 163eb57138..aea1dee36f 100644
--- a/src/qt_common/config/shared_translation.cpp
+++ b/src/qt_common/config/shared_translation.cpp
@@ -325,6 +325,10 @@ std::unique_ptr<TranslationMap> InitializeTranslations(QObject* parent)
            tr("Sync to framerate of video playback"),
            tr("Run the game at normal speed during video playback, even when the framerate is "
               "unlocked."));
+    INSERT(Settings,
+           force_smaller_buffers,
+           tr("Force smaller buffers"),
+           tr("Forces buffers to be smaller, may cause reads/writes out of bounds for some games but can fix Out-of-memory errors."));
     INSERT(Settings,
            barrier_feedback_loops,
            tr("Barrier feedback loops"),
diff --git a/src/video_core/renderer_vulkan/vk_query_cache.cpp b/src/video_core/renderer_vulkan/vk_query_cache.cpp
index 414c270c8e..ba2195734a 100644
--- a/src/video_core/renderer_vulkan/vk_query_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_query_cache.cpp
@@ -15,6 +15,7 @@
 #include <vector>
 #include "video_core/renderer_vulkan/vk_texture_cache.h"
 #include "common/bit_util.h"
+#include "common/settings.h"
 #include "common/common_types.h"
 #include "video_core/engines/draw_manager.h"
 #include "video_core/host1x/gpu_device_memory_manager.h"
@@ -543,7 +544,9 @@ private:
             .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
             .pNext = nullptr,
             .flags = 0,
-            .size = SamplesQueryBank::QUERY_SIZE * (1ULL << log_2),
+            .size = ::Settings::values.force_smaller_buffers.GetValue()
+                ? (SamplesQueryBank::QUERY_SIZE * (1ULL << log_2))
+                : (SamplesQueryBank::QUERY_SIZE * num_needed),
             .usage = VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT |
                      VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
             .sharingMode = VK_SHARING_MODE_EXCLUSIVE,
diff --git a/src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp b/src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp
index 08513d1534..0ae9873424 100644
--- a/src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp
+++ b/src/video_core/renderer_vulkan/vk_staging_buffer_pool.cpp
@@ -14,6 +14,7 @@
 #include "common/assert.h"
 #include "common/bit_util.h"
 #include "common/common_types.h"
+#include "common/settings.h"
 #include "common/literals.h"
 #include "video_core/renderer_vulkan/vk_scheduler.h"
 #include "video_core/renderer_vulkan/vk_staging_buffer_pool.h"
@@ -186,7 +187,7 @@ StagingBufferRef StagingBufferPool::CreateStagingBuffer(size_t size, MemoryUsage
         .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
         .pNext = nullptr,
         .flags = 0,
-        .size = 1ULL << log2,
+        .size = ::Settings::values.force_smaller_buffers.GetValue() ? size : (1ULL << log2),
         .usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT |
                  VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
                  VK_BUFFER_USAGE_INDEX_BUFFER_BIT | VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,