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[TEST] Split downloads

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This commit is contained in:
CamilleLaVey
2026-08-08 19:03:46 -04:00
parent e26153b3d3
commit e46dd1bd5f
1 changed files with 40 additions and 4 deletions
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src/video_core/buffer_cache/buffer_cache.h
+40 -4
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@@ -602,7 +602,13 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
it++;
}
boost::container::small_vector<std::pair<BufferCopy, BufferId>, 16> downloads;
struct QueuedDownload {
BufferCopy copy;
BufferId buffer_id;
bool written_in_place;
};
boost::container::small_vector<QueuedDownload, 16> downloads;
u64 total_size_bytes = 0;
u64 largest_copy = 0;
for (const Common::RangeSet<DAddr>& range_set : committed_gpu_modified_ranges) {
@@ -618,7 +624,8 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
new_start, new_end - new_start, false,
[&](u64 device_addr_out, u64 range_size) {
const DAddr buffer_addr = buffer.CpuAddr();
const auto add_download = [&](DAddr start, DAddr end) {
const auto add_download = [&](DAddr start, DAddr end,
bool written_in_place) {
const u64 new_offset = start - buffer_addr;
const u64 new_size = end - start;
downloads.push_back({
@@ -628,6 +635,7 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
.size = new_size,
},
buffer_id,
written_in_place,
});
// Align up to avoid cache conflicts
constexpr u64 align = 64ULL;
@@ -635,9 +643,23 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
total_size_bytes += (new_size + align - 1) & mask;
largest_copy = (std::max)(largest_copy, new_size);
};
const auto split_by_in_place = [&](DAddr start, DAddr end) {
DAddr cursor = start;
in_place_gpu_written_ranges.ForEachInRange(
start, end - start, [&](DAddr in_start, DAddr in_end) {
if (cursor < in_start) {
add_download(cursor, in_start, false);
}
add_download(in_start, in_end, true);
cursor = in_end;
});
if (cursor < end) {
add_download(cursor, end, false);
}
};
gpu_modified_ranges.ForEachInRange(device_addr_out, range_size,
add_download);
split_by_in_place);
});
});
});
@@ -661,9 +683,18 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
boost::container::small_vector<u64, 4> window_ids;
UnifiedWindowGroups groups;
u64 staging_size_bytes = 0;
for (auto& [copy, buffer_id] : downloads) {
bool has_in_place_writes = false;
for (auto& [copy, buffer_id, written_in_place] : downloads) {
Buffer& buffer = slot_buffers[buffer_id];
const DAddr orig_device_addr = buffer.CpuAddr() + copy.src_offset;
if (written_in_place) {
BufferCopy record{copy};
record.src_offset = static_cast<size_t>(orig_device_addr);
async_downloads.Add(orig_device_addr, copy.size);
batch.unified_copies.push_back(record);
has_in_place_writes = true;
continue;
}
bool unified = false;
if constexpr (USE_UNIFIED_MEMORY) {
if (runtime.HasUnifiedMemory()) {
@@ -718,6 +749,11 @@ void BufferCache<P>::CommitAsyncFlushesHigh() {
runtime.UnifiedMemoryHostBarrier();
}
}
if constexpr (USE_UNIFIED_DIRECT_BINDING) {
if (has_in_place_writes) {
runtime.UnifiedMemoryShaderWriteBarrier();
}
}
runtime.PostCopyBarrier();
pending_downloads.emplace_back(std::move(batch));
async_buffers.emplace_back(std::move(download_staging));