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Buffer Cache: Fix High Downloads and don't predownload on Extreme.

This commit is contained in:
Fernando Sahmkow 2021-07-04 18:08:49 +02:00
parent 7dca756f30
commit 0e4d4b4beb
4 changed files with 125 additions and 94 deletions
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2
src/tests/video_core/buffer_base.cpp
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@ -536,7 +536,7 @@ TEST_CASE("BufferBase: Cached write downloads") {
REQUIRE(rasterizer.Count() == 63);
buffer.MarkRegionAsGpuModified(c + PAGE, PAGE);
int num = 0;
buffer.ForEachDownloadRange(c, WORD, [&](u64 offset, u64 size) { ++num; });
buffer.ForEachDownloadRange(c, WORD, true, [&](u64 offset, u64 size) { ++num; });
buffer.ForEachUploadRange(c, WORD, [&](u64 offset, u64 size) { ++num; });
REQUIRE(num == 0);
REQUIRE(!buffer.IsRegionCpuModified(c + PAGE, PAGE));

14
src/video_core/buffer_cache/buffer_base.h
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@ -226,19 +226,19 @@ public:
/// Call 'func' for each CPU modified range and unmark those pages as CPU modified
template <typename Func>
void ForEachUploadRange(VAddr query_cpu_range, u64 size, Func&& func) {
ForEachModifiedRange<Type::CPU>(query_cpu_range, size, func);
ForEachModifiedRange<Type::CPU>(query_cpu_range, size, true, func);
}
/// Call 'func' for each GPU modified range and unmark those pages as GPU modified
template <typename Func>
void ForEachDownloadRange(VAddr query_cpu_range, u64 size, Func&& func) {
ForEachModifiedRange<Type::GPU>(query_cpu_range, size, func);
void ForEachDownloadRange(VAddr query_cpu_range, u64 size, bool clear, Func&& func) {
ForEachModifiedRange<Type::GPU>(query_cpu_range, size, clear, func);
}
/// Call 'func' for each GPU modified range and unmark those pages as GPU modified
template <typename Func>
void ForEachDownloadRange(Func&& func) {
ForEachModifiedRange<Type::GPU>(cpu_addr, SizeBytes(), func);
ForEachModifiedRange<Type::GPU>(cpu_addr, SizeBytes(), true, func);
}
/// Mark buffer as picked
@ -415,7 +415,7 @@ private:
* @param func Function to call for each turned off region
*/
template <Type type, typename Func>
void ForEachModifiedRange(VAddr query_cpu_range, s64 size, Func&& func) {
void ForEachModifiedRange(VAddr query_cpu_range, s64 size, bool clear, Func&& func) {
static_assert(type != Type::Untracked);
const s64 difference = query_cpu_range - cpu_addr;
@ -467,7 +467,9 @@ private:
bits = (bits << left_offset) >> left_offset;
const u64 current_word = state_words[word_index] & bits;
state_words[word_index] &= ~bits;
if (clear) {
state_words[word_index] &= ~bits;
}
if constexpr (type == Type::CPU) {
const u64 current_bits = untracked_words[word_index] & bits;

199
src/video_core/buffer_cache/buffer_cache.h
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@ -14,6 +14,7 @@
#include <unordered_map>
#include <vector>
#include <boost/icl/interval_set.hpp>
#include <boost/container/small_vector.hpp>
#include "common/common_types.h"
@ -77,6 +78,9 @@ class BufferCache {
using Runtime = typename P::Runtime;
using Buffer = typename P::Buffer;
using IntervalSet = boost::icl::interval_set<VAddr>;
using IntervalType = typename IntervalSet::interval_type;
struct Empty {};
struct OverlapResult {
@ -153,6 +157,7 @@ public:
/// Commit asynchronous downloads
void CommitAsyncFlushes();
void CommitAsyncFlushesHigh();
/// Pop asynchronous downloads
void PopAsyncFlushes();
@ -160,6 +165,9 @@ public:
/// Return true when a CPU region is modified from the GPU
[[nodiscard]] bool IsRegionGpuModified(VAddr addr, size_t size);
/// Return true when a CPU region is modified from the GPU
[[nodiscard]] bool IsRegionCpuModified(VAddr addr, size_t size);
std::mutex mutex;
private:
@ -272,8 +280,6 @@ private:
void DeleteBuffer(BufferId buffer_id);
void ReplaceBufferDownloads(BufferId old_buffer_id, BufferId new_buffer_id);
void NotifyBufferDeletion();
[[nodiscard]] Binding StorageBufferBinding(GPUVAddr ssbo_addr) const;
@ -328,8 +334,9 @@ private:
std::vector<BufferId> cached_write_buffer_ids;
// TODO: This data structure is not optimal and it should be reworked
std::vector<BufferId> uncommitted_downloads;
std::deque<std::vector<BufferId>> committed_downloads;
IntervalSet uncommitted_ranges;
std::deque<IntervalSet> committed_ranges;
std::deque<boost::container::small_vector<BufferCopy, 4>> pending_downloads;
size_t immediate_buffer_capacity = 0;
std::unique_ptr<u8[]> immediate_buffer_alloc;
@ -547,79 +554,98 @@ void BufferCache<P>::FlushCachedWrites() {
template <class P>
bool BufferCache<P>::HasUncommittedFlushes() const noexcept {
return !uncommitted_downloads.empty();
return !uncommitted_ranges.empty();
}
template <class P>
bool BufferCache<P>::ShouldWaitAsyncFlushes() const noexcept {
return !committed_downloads.empty() && !committed_downloads.front().empty();
return false;
}
template <class P>
void BufferCache<P>::CommitAsyncFlushesHigh() {
const IntervalSet& intervals = uncommitted_ranges;
if (intervals.empty()) {
return;
}
MICROPROFILE_SCOPE(GPU_DownloadMemory);
boost::container::small_vector<std::pair<BufferCopy, BufferId>, 1> downloads;
u64 total_size_bytes = 0;
u64 largest_copy = 0;
for (auto& interval : intervals) {
const std::size_t size = interval.upper() - interval.lower();
const VAddr cpu_addr = interval.lower();
const VAddr cpu_addr_end = interval.upper();
ForEachBufferInRange(cpu_addr, size, [&](BufferId buffer_id, Buffer& buffer) {
boost::container::small_vector<BufferCopy, 1> copies;
buffer.ForEachDownloadRange(cpu_addr, size, false, [&](u64 range_offset, u64 range_size) {
VAddr cpu_addr_base = buffer.CpuAddr() + range_offset;
VAddr cpu_addr_end2 = cpu_addr_base + range_size;
const s64 difference = s64(cpu_addr_end2 - cpu_addr_end);
cpu_addr_end2 -= u64(std::max<s64>(difference, 0));
const s64 difference2 = s64(cpu_addr - cpu_addr_base);
cpu_addr_base += u64(std::max<s64>(difference2, 0));
const u64 new_size = cpu_addr_end2 - cpu_addr_base;
const u64 new_offset = cpu_addr_base - buffer.CpuAddr();
ASSERT(!IsRegionCpuModified(cpu_addr_base, new_size));
downloads.push_back({
BufferCopy{
.src_offset = new_offset,
.dst_offset = total_size_bytes,
.size = new_size,
},
buffer_id,
});
total_size_bytes += new_size;
buffer.UnmarkRegionAsGpuModified(cpu_addr_base, new_size);
largest_copy = std::max(largest_copy, new_size);
});
});
}
if (downloads.empty()) {
return;
}
if constexpr (USE_MEMORY_MAPS) {
auto download_staging = runtime.DownloadStagingBuffer(total_size_bytes);
for (auto& [copy, buffer_id] : downloads) {
// Have in mind the staging buffer offset for the copy
copy.dst_offset += download_staging.offset;
const std::array copies{copy};
runtime.CopyBuffer(download_staging.buffer, slot_buffers[buffer_id], copies);
}
runtime.Finish();
for (const auto& [copy, buffer_id] : downloads) {
const Buffer& buffer = slot_buffers[buffer_id];
const VAddr cpu_addr = buffer.CpuAddr() + copy.src_offset;
// Undo the modified offset
const u64 dst_offset = copy.dst_offset - download_staging.offset;
const u8* read_mapped_memory = download_staging.mapped_span.data() + dst_offset;
cpu_memory.WriteBlockUnsafe(cpu_addr, read_mapped_memory, copy.size);
}
} else {
const std::span<u8> immediate_buffer = ImmediateBuffer(largest_copy);
for (const auto& [copy, buffer_id] : downloads) {
Buffer& buffer = slot_buffers[buffer_id];
buffer.ImmediateDownload(copy.src_offset, immediate_buffer.subspan(0, copy.size));
const VAddr cpu_addr = buffer.CpuAddr() + copy.src_offset;
cpu_memory.WriteBlockUnsafe(cpu_addr, immediate_buffer.data(), copy.size);
}
}
}
template <class P>
void BufferCache<P>::CommitAsyncFlushes() {
// This is intentionally passing the value by copy
committed_downloads.push_front(uncommitted_downloads);
uncommitted_downloads.clear();
if (Settings::values.gpu_accuracy.GetValue() == Settings::GPUAccuracy::High) {
CommitAsyncFlushesHigh();
} else {
uncommitted_ranges.clear();
}
}
template <class P>
void BufferCache<P>::PopAsyncFlushes() {
if (committed_downloads.empty()) {
return;
}
auto scope_exit_pop_download = detail::ScopeExit([this] { committed_downloads.pop_back(); });
const std::span<const BufferId> download_ids = committed_downloads.back();
if (download_ids.empty()) {
return;
}
MICROPROFILE_SCOPE(GPU_DownloadMemory);
boost::container::small_vector<std::pair<BufferCopy, BufferId>, 1> downloads;
u64 total_size_bytes = 0;
u64 largest_copy = 0;
for (const BufferId buffer_id : download_ids) {
slot_buffers[buffer_id].ForEachDownloadRange([&](u64 range_offset, u64 range_size) {
downloads.push_back({
BufferCopy{
.src_offset = range_offset,
.dst_offset = total_size_bytes,
.size = range_size,
},
buffer_id,
});
total_size_bytes += range_size;
largest_copy = std::max(largest_copy, range_size);
});
}
if (downloads.empty()) {
return;
}
if constexpr (USE_MEMORY_MAPS) {
auto download_staging = runtime.DownloadStagingBuffer(total_size_bytes);
for (auto& [copy, buffer_id] : downloads) {
// Have in mind the staging buffer offset for the copy
copy.dst_offset += download_staging.offset;
const std::array copies{copy};
runtime.CopyBuffer(download_staging.buffer, slot_buffers[buffer_id], copies);
}
runtime.Finish();
for (const auto& [copy, buffer_id] : downloads) {
const Buffer& buffer = slot_buffers[buffer_id];
const VAddr cpu_addr = buffer.CpuAddr() + copy.src_offset;
// Undo the modified offset
const u64 dst_offset = copy.dst_offset - download_staging.offset;
const u8* read_mapped_memory = download_staging.mapped_span.data() + dst_offset;
cpu_memory.WriteBlockUnsafe(cpu_addr, read_mapped_memory, copy.size);
}
} else {
const std::span<u8> immediate_buffer = ImmediateBuffer(largest_copy);
for (const auto& [copy, buffer_id] : downloads) {
Buffer& buffer = slot_buffers[buffer_id];
buffer.ImmediateDownload(copy.src_offset, immediate_buffer.subspan(0, copy.size));
const VAddr cpu_addr = buffer.CpuAddr() + copy.src_offset;
cpu_memory.WriteBlockUnsafe(cpu_addr, immediate_buffer.data(), copy.size);
}
}
}
template <class P>
@ -641,6 +667,25 @@ bool BufferCache<P>::IsRegionGpuModified(VAddr addr, size_t size) {
return false;
}
template <class P>
bool BufferCache<P>::IsRegionCpuModified(VAddr addr, size_t size) {
const u64 page_end = Common::DivCeil(addr + size, PAGE_SIZE);
for (u64 page = addr >> PAGE_BITS; page < page_end;) {
const BufferId image_id = page_table[page];
if (!image_id) {
++page;
continue;
}
Buffer& buffer = slot_buffers[image_id];
if (buffer.IsRegionCpuModified(addr, size)) {
return true;
}
const VAddr end_addr = buffer.CpuAddr() + buffer.SizeBytes();
page = Common::DivCeil(end_addr, PAGE_SIZE);
}
return false;
}
template <class P>
void BufferCache<P>::BindHostIndexBuffer() {
Buffer& buffer = slot_buffers[index_buffer.buffer_id];
@ -1010,16 +1055,13 @@ void BufferCache<P>::MarkWrittenBuffer(BufferId buffer_id, VAddr cpu_addr, u32 s
Buffer& buffer = slot_buffers[buffer_id];
buffer.MarkRegionAsGpuModified(cpu_addr, size);
const bool is_accuracy_high = Settings::IsGPULevelHigh();
const bool is_accuracy_high = Settings::values.gpu_accuracy.GetValue() == Settings::GPUAccuracy::High;
const bool is_async = Settings::values.use_asynchronous_gpu_emulation.GetValue();
if (!is_accuracy_high || !is_async) {
if (!is_async && !is_accuracy_high) {
return;
}
if (std::ranges::find(uncommitted_downloads, buffer_id) != uncommitted_downloads.end()) {
// Already inserted
return;
}
uncommitted_downloads.push_back(buffer_id);
const IntervalType base_interval{cpu_addr, cpu_addr + size};
uncommitted_ranges.add(base_interval);
}
template <class P>
@ -1103,7 +1145,6 @@ void BufferCache<P>::JoinOverlap(BufferId new_buffer_id, BufferId overlap_id,
if (!copies.empty()) {
runtime.CopyBuffer(slot_buffers[new_buffer_id], overlap, copies);
}
ReplaceBufferDownloads(overlap_id, new_buffer_id);
DeleteBuffer(overlap_id);
}
@ -1244,7 +1285,7 @@ void BufferCache<P>::DownloadBufferMemory(Buffer& buffer, VAddr cpu_addr, u64 si
boost::container::small_vector<BufferCopy, 1> copies;
u64 total_size_bytes = 0;
u64 largest_copy = 0;
buffer.ForEachDownloadRange(cpu_addr, size, [&](u64 range_offset, u64 range_size) {
buffer.ForEachDownloadRange(cpu_addr, size, true, [&](u64 range_offset, u64 range_size) {
copies.push_back(BufferCopy{
.src_offset = range_offset,
.dst_offset = total_size_bytes,
@ -1315,18 +1356,6 @@ void BufferCache<P>::DeleteBuffer(BufferId buffer_id) {
NotifyBufferDeletion();
}
template <class P>
void BufferCache<P>::ReplaceBufferDownloads(BufferId old_buffer_id, BufferId new_buffer_id) {
const auto replace = [old_buffer_id, new_buffer_id](std::vector<BufferId>& buffers) {
std::ranges::replace(buffers, old_buffer_id, new_buffer_id);
if (auto it = std::ranges::find(buffers, new_buffer_id); it != buffers.end()) {
buffers.erase(std::remove(it + 1, buffers.end(), new_buffer_id), buffers.end());
}
};
replace(uncommitted_downloads);
std::ranges::for_each(committed_downloads, replace);
}
template <class P>
void BufferCache<P>::NotifyBufferDeletion() {
if constexpr (HAS_PERSISTENT_UNIFORM_BUFFER_BINDINGS) {

4
src/video_core/texture_cache/types.h
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@ -133,8 +133,8 @@ struct BufferImageCopy {
};
struct BufferCopy {
size_t src_offset;
size_t dst_offset;
u64 src_offset;
u64 dst_offset;
size_t size;
};