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Merge pull request #12056 from ameerj/opengl-neglect

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OpenGL: Implement async downloads in buffer and texture caches
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liamwhite 2023-12-01 09:16:56 -05:00 committed by GitHub
commit 1c21d6c2c2
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6 changed files with 74 additions and 44 deletions
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8
src/video_core/renderer_opengl/gl_buffer_cache.cpp
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@ -146,8 +146,12 @@ StagingBufferMap BufferCacheRuntime::UploadStagingBuffer(size_t size) {
return staging_buffer_pool.RequestUploadBuffer(size);
}
StagingBufferMap BufferCacheRuntime::DownloadStagingBuffer(size_t size) {
return staging_buffer_pool.RequestDownloadBuffer(size);
StagingBufferMap BufferCacheRuntime::DownloadStagingBuffer(size_t size, bool deferred) {
return staging_buffer_pool.RequestDownloadBuffer(size, deferred);
}
void BufferCacheRuntime::FreeDeferredStagingBuffer(StagingBufferMap& buffer) {
staging_buffer_pool.FreeDeferredStagingBuffer(buffer);
}
u64 BufferCacheRuntime::GetDeviceMemoryUsage() const {

6
src/video_core/renderer_opengl/gl_buffer_cache.h
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@ -66,7 +66,9 @@ public:
[[nodiscard]] StagingBufferMap UploadStagingBuffer(size_t size);
[[nodiscard]] StagingBufferMap DownloadStagingBuffer(size_t size);
[[nodiscard]] StagingBufferMap DownloadStagingBuffer(size_t size, bool deferred = false);
void FreeDeferredStagingBuffer(StagingBufferMap& buffer);
bool CanReorderUpload(const Buffer&, std::span<const VideoCommon::BufferCopy>) {
return false;
@ -246,7 +248,7 @@ struct BufferCacheParams {
static constexpr bool NEEDS_BIND_STORAGE_INDEX = true;
static constexpr bool USE_MEMORY_MAPS = true;
static constexpr bool SEPARATE_IMAGE_BUFFER_BINDINGS = true;
static constexpr bool IMPLEMENTS_ASYNC_DOWNLOADS = false;
static constexpr bool IMPLEMENTS_ASYNC_DOWNLOADS = true;
// TODO: Investigate why OpenGL seems to perform worse with persistently mapped buffer uploads
static constexpr bool USE_MEMORY_MAPS_FOR_UPLOADS = false;

66
src/video_core/renderer_opengl/gl_staging_buffer_pool.cpp
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@ -28,63 +28,69 @@ StagingBuffers::StagingBuffers(GLenum storage_flags_, GLenum map_flags_)
StagingBuffers::~StagingBuffers() = default;
StagingBufferMap StagingBuffers::RequestMap(size_t requested_size, bool insert_fence) {
StagingBufferMap StagingBuffers::RequestMap(size_t requested_size, bool insert_fence,
bool deferred) {
MICROPROFILE_SCOPE(OpenGL_BufferRequest);
const size_t index = RequestBuffer(requested_size);
OGLSync* const sync = insert_fence ? &syncs[index] : nullptr;
sync_indices[index] = insert_fence ? ++current_sync_index : 0;
OGLSync* const sync = insert_fence ? &allocs[index].sync : nullptr;
allocs[index].sync_index = insert_fence ? ++current_sync_index : 0;
allocs[index].deferred = deferred;
return StagingBufferMap{
.mapped_span = std::span(maps[index], requested_size),
.mapped_span = std::span(allocs[index].map, requested_size),
.sync = sync,
.buffer = buffers[index].handle,
.buffer = allocs[index].buffer.handle,
.index = index,
};
}
void StagingBuffers::FreeDeferredStagingBuffer(size_t index) {
ASSERT(allocs[index].deferred);
allocs[index].deferred = false;
}
size_t StagingBuffers::RequestBuffer(size_t requested_size) {
if (const std::optional<size_t> index = FindBuffer(requested_size); index) {
return *index;
}
OGLBuffer& buffer = buffers.emplace_back();
buffer.Create();
StagingBufferAlloc alloc;
alloc.buffer.Create();
const auto next_pow2_size = Common::NextPow2(requested_size);
glNamedBufferStorage(buffer.handle, next_pow2_size, nullptr,
glNamedBufferStorage(alloc.buffer.handle, next_pow2_size, nullptr,
storage_flags | GL_MAP_PERSISTENT_BIT);
maps.push_back(static_cast<u8*>(glMapNamedBufferRange(buffer.handle, 0, next_pow2_size,
map_flags | GL_MAP_PERSISTENT_BIT)));
syncs.emplace_back();
sync_indices.emplace_back();
sizes.push_back(next_pow2_size);
ASSERT(syncs.size() == buffers.size() && buffers.size() == maps.size() &&
maps.size() == sizes.size());
return buffers.size() - 1;
alloc.map = static_cast<u8*>(glMapNamedBufferRange(alloc.buffer.handle, 0, next_pow2_size,
map_flags | GL_MAP_PERSISTENT_BIT));
alloc.size = next_pow2_size;
allocs.emplace_back(std::move(alloc));
return allocs.size() - 1;
}
std::optional<size_t> StagingBuffers::FindBuffer(size_t requested_size) {
size_t known_unsignaled_index = current_sync_index + 1;
size_t smallest_buffer = std::numeric_limits<size_t>::max();
std::optional<size_t> found;
const size_t num_buffers = sizes.size();
const size_t num_buffers = allocs.size();
for (size_t index = 0; index < num_buffers; ++index) {
const size_t buffer_size = sizes[index];
StagingBufferAlloc& alloc = allocs[index];
const size_t buffer_size = alloc.size;
if (buffer_size < requested_size || buffer_size >= smallest_buffer) {
continue;
}
if (syncs[index].handle != 0) {
if (sync_indices[index] >= known_unsignaled_index) {
if (alloc.deferred) {
continue;
}
if (alloc.sync.handle != 0) {
if (alloc.sync_index >= known_unsignaled_index) {
// This fence is later than a fence that is known to not be signaled
continue;
}
if (!syncs[index].IsSignaled()) {
if (!alloc.sync.IsSignaled()) {
// Since this fence hasn't been signaled, it's safe to assume all later
// fences haven't been signaled either
known_unsignaled_index = std::min(known_unsignaled_index, sync_indices[index]);
known_unsignaled_index = std::min(known_unsignaled_index, alloc.sync_index);
continue;
}
syncs[index].Release();
alloc.sync.Release();
}
smallest_buffer = buffer_size;
found = index;
@ -143,8 +149,12 @@ StagingBufferMap StagingBufferPool::RequestUploadBuffer(size_t size) {
return upload_buffers.RequestMap(size, true);
}
StagingBufferMap StagingBufferPool::RequestDownloadBuffer(size_t size) {
return download_buffers.RequestMap(size, false);
StagingBufferMap StagingBufferPool::RequestDownloadBuffer(size_t size, bool deferred) {
return download_buffers.RequestMap(size, false, deferred);
}
void StagingBufferPool::FreeDeferredStagingBuffer(StagingBufferMap& buffer) {
download_buffers.FreeDeferredStagingBuffer(buffer.index);
}
} // namespace OpenGL

22
src/video_core/renderer_opengl/gl_staging_buffer_pool.h
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@ -26,23 +26,30 @@ struct StagingBufferMap {
size_t offset = 0;
OGLSync* sync;
GLuint buffer;
size_t index;
};
struct StagingBuffers {
explicit StagingBuffers(GLenum storage_flags_, GLenum map_flags_);
~StagingBuffers();
StagingBufferMap RequestMap(size_t requested_size, bool insert_fence);
StagingBufferMap RequestMap(size_t requested_size, bool insert_fence, bool deferred = false);
void FreeDeferredStagingBuffer(size_t index);
size_t RequestBuffer(size_t requested_size);
std::optional<size_t> FindBuffer(size_t requested_size);
std::vector<OGLSync> syncs;
std::vector<OGLBuffer> buffers;
std::vector<u8*> maps;
std::vector<size_t> sizes;
std::vector<size_t> sync_indices;
struct StagingBufferAlloc {
OGLSync sync;
OGLBuffer buffer;
u8* map;
size_t size;
size_t sync_index;
bool deferred;
};
std::vector<StagingBufferAlloc> allocs;
GLenum storage_flags;
GLenum map_flags;
size_t current_sync_index = 0;
@ -85,7 +92,8 @@ public:
~StagingBufferPool() = default;
StagingBufferMap RequestUploadBuffer(size_t size);
StagingBufferMap RequestDownloadBuffer(size_t size);
StagingBufferMap RequestDownloadBuffer(size_t size, bool deferred = false);
void FreeDeferredStagingBuffer(StagingBufferMap& buffer);
private:
StagingBuffers upload_buffers{GL_MAP_WRITE_BIT, GL_MAP_WRITE_BIT | GL_MAP_FLUSH_EXPLICIT_BIT};

8
src/video_core/renderer_opengl/gl_texture_cache.cpp
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@ -557,8 +557,12 @@ StagingBufferMap TextureCacheRuntime::UploadStagingBuffer(size_t size) {
return staging_buffer_pool.RequestUploadBuffer(size);
}
StagingBufferMap TextureCacheRuntime::DownloadStagingBuffer(size_t size) {
return staging_buffer_pool.RequestDownloadBuffer(size);
StagingBufferMap TextureCacheRuntime::DownloadStagingBuffer(size_t size, bool deferred) {
return staging_buffer_pool.RequestDownloadBuffer(size, deferred);
}
void TextureCacheRuntime::FreeDeferredStagingBuffer(StagingBufferMap& buffer) {
staging_buffer_pool.FreeDeferredStagingBuffer(buffer);
}
u64 TextureCacheRuntime::GetDeviceMemoryUsage() const {

8
src/video_core/renderer_opengl/gl_texture_cache.h
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@ -74,7 +74,9 @@ public:
StagingBufferMap UploadStagingBuffer(size_t size);
StagingBufferMap DownloadStagingBuffer(size_t size);
StagingBufferMap DownloadStagingBuffer(size_t size, bool deferred = false);
void FreeDeferredStagingBuffer(StagingBufferMap& buffer);
u64 GetDeviceLocalMemory() const {
return device_access_memory;
@ -359,7 +361,7 @@ struct TextureCacheParams {
static constexpr bool FRAMEBUFFER_BLITS = true;
static constexpr bool HAS_EMULATED_COPIES = true;
static constexpr bool HAS_DEVICE_MEMORY_INFO = true;
static constexpr bool IMPLEMENTS_ASYNC_DOWNLOADS = false;
static constexpr bool IMPLEMENTS_ASYNC_DOWNLOADS = true;
using Runtime = OpenGL::TextureCacheRuntime;
using Image = OpenGL::Image;
@ -367,7 +369,7 @@ struct TextureCacheParams {
using ImageView = OpenGL::ImageView;
using Sampler = OpenGL::Sampler;
using Framebuffer = OpenGL::Framebuffer;
using AsyncBuffer = u32;
using AsyncBuffer = OpenGL::StagingBufferMap;
using BufferType = GLuint;
};