Buffer Cache: Tune to the levels of the new GC.

src/video_core/buffer_cache/buffer_cache.h

@@ -76,8 +76,9 @@ class BufferCache {
 
     static constexpr BufferId NULL_BUFFER_ID{0};
 
-    static constexpr u64 EXPECTED_MEMORY = 512_MiB;
-    static constexpr u64 CRITICAL_MEMORY = 1_GiB;
+    static constexpr s64 DEFAULT_EXPECTED_MEMORY = 512_MiB;
+    static constexpr s64 DEFAULT_CRITICAL_MEMORY = 1_GiB;
+    static constexpr s64 TARGET_THRESHOLD = 4_GiB;
 
     using Maxwell = Tegra::Engines::Maxwell3D::Regs;
 
@@ -436,6 +437,8 @@ private:
     Common::LeastRecentlyUsedCache<LRUItemParams> lru_cache;
     u64 frame_tick = 0;
     u64 total_used_memory = 0;
+    u64 minimum_memory = 0;
+    u64 critical_memory = 0;
 
     std::array<BufferId, ((1ULL << 39) >> PAGE_BITS)> page_table;
 };
@@ -451,11 +454,30 @@ BufferCache<P>::BufferCache(VideoCore::RasterizerInterface& rasterizer_,
     // Ensure the first slot is used for the null buffer
     void(slot_buffers.insert(runtime, NullBufferParams{}));
     common_ranges.clear();
+
+    if (!runtime.CanReportMemoryUsage()) {
+        minimum_memory = DEFAULT_EXPECTED_MEMORY;
+        critical_memory = DEFAULT_CRITICAL_MEMORY;
+        return;
+    }
+
+    const s64 device_memory = static_cast<s64>(runtime.GetDeviceLocalMemory());
+    const s64 min_spacing_expected = device_memory - 1_GiB - 512_MiB;
+    const s64 min_spacing_critical = device_memory - 1_GiB;
+    const s64 mem_tresshold = std::min(device_memory, TARGET_THRESHOLD);
+    const s64 min_vacancy_expected = (6 * mem_tresshold) / 10;
+    const s64 min_vacancy_critical = (3 * mem_tresshold) / 10;
+    minimum_memory = static_cast<u64>(
+        std::max(std::min(device_memory - min_vacancy_expected, min_spacing_expected),
+                 DEFAULT_EXPECTED_MEMORY));
+    critical_memory = static_cast<u64>(
+        std::max(std::min(device_memory - min_vacancy_critical, min_spacing_critical),
+                 DEFAULT_CRITICAL_MEMORY));
 }
 
 template <class P>
 void BufferCache<P>::RunGarbageCollector() {
-    const bool aggressive_gc = total_used_memory >= CRITICAL_MEMORY;
+    const bool aggressive_gc = total_used_memory >= critical_memory;
     const u64 ticks_to_destroy = aggressive_gc ? 60 : 120;
     int num_iterations = aggressive_gc ? 64 : 32;
     const auto clean_up = [this, &num_iterations](BufferId buffer_id) {
@@ -486,7 +508,11 @@ void BufferCache<P>::TickFrame() {
     const bool skip_preferred = hits * 256 < shots * 251;
     uniform_buffer_skip_cache_size = skip_preferred ? DEFAULT_SKIP_CACHE_SIZE : 0;
 
-    if (total_used_memory >= EXPECTED_MEMORY) {
+    // If we can obtain the memory info, use it instead of the estimate.
+    if (runtime.CanReportMemoryUsage()) {
+        total_used_memory = runtime.GetDeviceMemoryUsage();
+    }
+    if (total_used_memory >= minimum_memory) {
         RunGarbageCollector();
     }
     ++frame_tick;

src/video_core/renderer_opengl/gl_buffer_cache.cpp

@@ -135,6 +135,24 @@ BufferCacheRuntime::BufferCacheRuntime(const Device& device_)
         buffer.Create();
         glNamedBufferData(buffer.handle, 0x10'000, nullptr, GL_STREAM_COPY);
     }
+
+    device_access_memory = []() -> u64 {
+        if (GLAD_GL_NVX_gpu_memory_info) {
+            GLint cur_avail_mem_kb = 0;
+            glGetIntegerv(GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &cur_avail_mem_kb);
+            return static_cast<u64>(cur_avail_mem_kb) * 1_KiB;
+        }
+        return 2_GiB; // Return minimum requirements
+    }();
+}
+
+u64 BufferCacheRuntime::GetDeviceMemoryUsage() const {
+    if (GLAD_GL_NVX_gpu_memory_info) {
+        GLint cur_avail_mem_kb = 0;
+        glGetIntegerv(GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &cur_avail_mem_kb);
+        return static_cast<u64>(cur_avail_mem_kb) * 1_KiB;
+    }
+    return 2_GiB;
 }
 
 void BufferCacheRuntime::CopyBuffer(Buffer& dst_buffer, Buffer& src_buffer,

src/video_core/renderer_opengl/gl_buffer_cache.h

@@ -151,6 +151,16 @@ public:
         use_storage_buffers = use_storage_buffers_;
     }
 
+    u64 GetDeviceLocalMemory() const {
+        return device_access_memory;
+    }
+
+    u64 GetDeviceMemoryUsage() const;
+
+    bool CanReportMemoryUsage() const {
+        return GLAD_GL_NVX_gpu_memory_info;
+    }
+
 private:
     static constexpr std::array PABO_LUT{
         GL_VERTEX_PROGRAM_PARAMETER_BUFFER_NV,          GL_TESS_CONTROL_PROGRAM_PARAMETER_BUFFER_NV,
@@ -184,6 +194,8 @@ private:
     std::array<OGLBuffer, VideoCommon::NUM_COMPUTE_UNIFORM_BUFFERS> copy_compute_uniforms;
 
     u32 index_buffer_offset = 0;
+
+    u64 device_access_memory;
 };
 
 struct BufferCacheParams {

src/video_core/renderer_vulkan/vk_buffer_cache.cpp

@@ -141,6 +141,18 @@ StagingBufferRef BufferCacheRuntime::DownloadStagingBuffer(size_t size) {
     return staging_pool.Request(size, MemoryUsage::Download);
 }
 
+u64 BufferCacheRuntime::GetDeviceLocalMemory() const {
+    return device.GetDeviceLocalMemory();
+}
+
+u64 BufferCacheRuntime::GetDeviceMemoryUsage() const {
+    return device.GetDeviceMemoryUsage();
+}
+
+bool BufferCacheRuntime::CanReportMemoryUsage() const {
+    return device.CanReportMemoryUsage();
+}
+
 void BufferCacheRuntime::Finish() {
     scheduler.Finish();
 }

src/video_core/renderer_vulkan/vk_buffer_cache.h

@@ -65,6 +65,12 @@ public:
 
     void Finish();
 
+    u64 GetDeviceLocalMemory() const;
+
+    u64 GetDeviceMemoryUsage() const;
+
+    bool CanReportMemoryUsage() const;
+
     [[nodiscard]] StagingBufferRef UploadStagingBuffer(size_t size);
 
     [[nodiscard]] StagingBufferRef DownloadStagingBuffer(size_t size);

src/video_core/texture_cache/texture_cache_base.h

@@ -60,8 +60,6 @@ class TextureCache {
     static constexpr bool HAS_DEVICE_MEMORY_INFO = P::HAS_DEVICE_MEMORY_INFO;
 
     static constexpr s64 TARGET_THRESHOLD = 4_GiB;
-    static constexpr s64 MIN_VACANCY_EXPECTED = (6 * TARGET_THRESHOLD) / 10;
-    static constexpr s64 MIN_VACANCY_CRITICAL = (3 * TARGET_THRESHOLD) / 10;
     static constexpr s64 DEFAULT_EXPECTED_MEMORY = 1_GiB + 125_MiB;
     static constexpr s64 DEFAULT_CRITICAL_MEMORY = 1_GiB + 625_MiB;
     static constexpr size_t GC_EMERGENCY_COUNTS = 2;