From 3b2dee88e67eaa968fd0dba19d10871e0b6570b9 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Wed, 27 May 2020 23:05:50 -0300
Subject: [PATCH] buffer_cache: Avoid copying twice on certain cases
Avoid copying to a staging buffer on non-granular memory addresses.
Add a callable argument to StreamBufferUpload to be able to copy to the
staging buffer directly from ReadBlockUnsafe.
---
src/video_core/buffer_cache/buffer_cache.h | 40 +++++++++++++---------
1 file changed, 23 insertions(+), 17 deletions(-)
diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index d9a4a1b4d..b88fce2cd 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -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;