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Merge pull request #4001 from ReinUsesLisp/avoid-copies

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buffer_cache: Avoid copying twice on certain cases
This commit is contained in:
bunnei 2020-06-01 16:59:17 -04:00 committed by GitHub
commit 4511502ca6
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 17 deletions
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40
src/video_core/buffer_cache/buffer_cache.h
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@ -56,24 +56,28 @@ public:
if (use_fast_cbuf || size < max_stream_size) {
if (!is_written && !IsRegionWritten(cpu_addr, cpu_addr + size - 1)) {
auto& memory_manager = system.GPU().MemoryManager();
const bool is_granular = memory_manager.IsGranularRange(gpu_addr, size);
if (use_fast_cbuf) {
if (memory_manager.IsGranularRange(gpu_addr, size)) {
const auto host_ptr = memory_manager.GetPointer(gpu_addr);
return ConstBufferUpload(host_ptr, size);
u8* dest;
if (is_granular) {
dest = memory_manager.GetPointer(gpu_addr);
} else {
staging_buffer.resize(size);
memory_manager.ReadBlockUnsafe(gpu_addr, staging_buffer.data(), size);
return ConstBufferUpload(staging_buffer.data(), size);
dest = staging_buffer.data();
memory_manager.ReadBlockUnsafe(gpu_addr, dest, size);
}
return ConstBufferUpload(dest, size);
}
if (is_granular) {
u8* const host_ptr = memory_manager.GetPointer(gpu_addr);
return StreamBufferUpload(size, alignment, [host_ptr, size](u8* dest) {
std::memcpy(dest, host_ptr, size);
});
} else {
if (memory_manager.IsGranularRange(gpu_addr, size)) {
const auto host_ptr = memory_manager.GetPointer(gpu_addr);
return StreamBufferUpload(host_ptr, size, alignment);
} else {
staging_buffer.resize(size);
memory_manager.ReadBlockUnsafe(gpu_addr, staging_buffer.data(), size);
return StreamBufferUpload(staging_buffer.data(), size, alignment);
}
return StreamBufferUpload(
size, alignment, [&memory_manager, gpu_addr, size](u8* dest) {
memory_manager.ReadBlockUnsafe(gpu_addr, dest, size);
});
}
}
}
@ -101,7 +105,9 @@ public:
BufferInfo UploadHostMemory(const void* raw_pointer, std::size_t size,
std::size_t alignment = 4) {
std::lock_guard lock{mutex};
return StreamBufferUpload(raw_pointer, size, alignment);
return StreamBufferUpload(size, alignment, [raw_pointer, size](u8* dest) {
std::memcpy(dest, raw_pointer, size);
});
}
void Map(std::size_t max_size) {
@ -424,11 +430,11 @@ private:
map->MarkAsModified(false, 0);
}
BufferInfo StreamBufferUpload(const void* raw_pointer, std::size_t size,
std::size_t alignment) {
template <typename Callable>
BufferInfo StreamBufferUpload(std::size_t size, std::size_t alignment, Callable&& callable) {
AlignBuffer(alignment);
const std::size_t uploaded_offset = buffer_offset;
std::memcpy(buffer_ptr, raw_pointer, size);
callable(buffer_ptr);
buffer_ptr += size;
buffer_offset += size;