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gl_buffer_cache: Copy to buffers created as STREAM_READ before downloading

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After marking buffers as resident, Nvidia's driver seems to take a
slow path. To workaround this issue, copy to a STREAM_READ buffer and
then call GetNamedBufferSubData on it.

This is a temporary solution until we have asynchronous flushing.
This commit is contained in:
ReinUsesLisp 2020-06-26 16:58:40 -03:00
parent c4fe83a7bc
commit 6481d91e4a
5 changed files with 24 additions and 18 deletions
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17
src/video_core/renderer_opengl/gl_buffer_cache.cpp
View file

@ -34,20 +34,27 @@ Buffer::Buffer(const Device& device, VAddr cpu_addr, std::size_t size)
Buffer::~Buffer() = default;
void Buffer::Upload(std::size_t offset, std::size_t size, const u8* data) const {
void Buffer::Upload(std::size_t offset, std::size_t size, const u8* data) {
glNamedBufferSubData(Handle(), static_cast<GLintptr>(offset), static_cast<GLsizeiptr>(size),
data);
}
void Buffer::Download(std::size_t offset, std::size_t size, u8* data) const {
void Buffer::Download(std::size_t offset, std::size_t size, u8* data) {
MICROPROFILE_SCOPE(OpenGL_Buffer_Download);
const GLsizeiptr gl_size = static_cast<GLsizeiptr>(size);
const GLintptr gl_offset = static_cast<GLintptr>(offset);
if (read_buffer.handle == 0) {
read_buffer.Create();
glNamedBufferData(read_buffer.handle, static_cast<GLsizeiptr>(Size()), nullptr,
GL_STREAM_READ);
}
glMemoryBarrier(GL_BUFFER_UPDATE_BARRIER_BIT);
glGetNamedBufferSubData(Handle(), static_cast<GLintptr>(offset), static_cast<GLsizeiptr>(size),
data);
glCopyNamedBufferSubData(gl_buffer.handle, read_buffer.handle, gl_offset, gl_offset, gl_size);
glGetNamedBufferSubData(read_buffer.handle, gl_offset, gl_size, data);
}
void Buffer::CopyFrom(const Buffer& src, std::size_t src_offset, std::size_t dst_offset,
std::size_t size) const {
std::size_t size) {
glCopyNamedBufferSubData(src.Handle(), Handle(), static_cast<GLintptr>(src_offset),
static_cast<GLintptr>(dst_offset), static_cast<GLsizeiptr>(size));
}

7
src/video_core/renderer_opengl/gl_buffer_cache.h
View file

@ -28,12 +28,12 @@ public:
explicit Buffer(const Device& device, VAddr cpu_addr, std::size_t size);
~Buffer();
void Upload(std::size_t offset, std::size_t size, const u8* data) const;
void Upload(std::size_t offset, std::size_t size, const u8* data);
void Download(std::size_t offset, std::size_t size, u8* data) const;
void Download(std::size_t offset, std::size_t size, u8* data);
void CopyFrom(const Buffer& src, std::size_t src_offset, std::size_t dst_offset,
std::size_t size) const;
std::size_t size);
GLuint Handle() const noexcept {
return gl_buffer.handle;
@ -45,6 +45,7 @@ public:
private:
OGLBuffer gl_buffer;
OGLBuffer read_buffer;
u64 gpu_address = 0;
};