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renderer: rewrite buffer lookup around page index

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This commit is contained in:
nmzik
2026-08-23 18:08:34 +02:00
parent cb378365e1
commit aa69b5b184
3 changed files with 105 additions and 60 deletions
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src/graphics/host_gpu/renderer/cache/bufferCache.cpp
Vendored
+56 -56
View File
@@ -56,11 +56,32 @@ struct BufferCache::DownloadRange {
uint64_t offset = 0;
};
void BufferCache::Register(BufferId id) {
const auto& buffer = m_slot_buffers[id];
PageTable::PageRange pages {};
EXIT_IF(!PageTable::TryGetPageRange(buffer.CpuAddress(), buffer.Size(), pages));
for (size_t page = pages.first; page < pages.last_exclusive; ++page) {
m_page_table[page] = id;
}
const auto [it, inserted] = m_buffers.emplace(buffer.CpuAddress(), id);
(void)it;
EXIT_IF(!inserted);
m_total_used_memory += buffer.Size();
}
void BufferCache::Unregister(BufferId id) {
auto& buffer = m_slot_buffers[id];
if (buffer.is_deleted) {
return;
}
PageTable::PageRange pages {};
EXIT_IF(!PageTable::TryGetPageRange(buffer.CpuAddress(), buffer.Size(), pages));
for (size_t page = pages.first; page < pages.last_exclusive; ++page) {
auto* owner = m_page_table.Find(page);
if (owner != nullptr && *owner == id) {
*owner = {};
}
}
const auto found = m_buffers.find(buffer.CpuAddress());
EXIT_IF(found == m_buffers.end() || found->second != id);
m_buffers.erase(found);
@@ -252,15 +273,15 @@ void BufferCache::ReadMemoryOnGpu(uint64_t vaddr, uint64_t size, bool is_write)
m_memory_tracker.ValidateGpuDirtyPages(m_gpu_modified_ranges, address, bytes,
"memory invalidation");
},
[&](uint64_t address, uint64_t bytes) noexcept {
[&](uint64_t address, uint64_t bytes) noexcept {
for (const auto range: m_gpu_modified_ranges.Intersections(address, bytes)) {
for (uint64_t copied = 0; copied < range.size;) {
const auto copy_address = range.address + copied;
auto owner = m_buffers.upper_bound(copy_address);
if (owner == m_buffers.begin()) {
const auto* owner = m_page_table.Find(copy_address >> PageTable::kPageBits);
if (owner == nullptr || !*owner) {
EXIT("BufferCache: invalidation readback has no buffer owner\n");
}
auto& buffer = m_slot_buffers[std::prev(owner)->second];
auto& buffer = m_slot_buffers[*owner];
if (!buffer.IsInBounds(copy_address, 1)) {
EXIT("BufferCache: invalidation readback is outside its buffer owner\n");
}
@@ -369,45 +390,35 @@ BufferId BufferCache::FindBuffer(uint64_t vaddr, uint64_t size) {
if (size == 0 || vaddr >= TRACKER_ADDRESS_SIZE || size > TRACKER_ADDRESS_SIZE - vaddr) {
EXIT("BufferCache: invalid buffer discovery request\n");
}
const auto* owner = m_page_table.Find(vaddr >> PageTable::kPageBits);
if (owner != nullptr && *owner) {
auto& buffer = m_slot_buffers[*owner];
if (buffer.IsInBounds(vaddr, size)) {
buffer.tick_accessed_last = m_gc_tick;
return *owner;
}
}
return CreateBuffer(vaddr, size);
}
BufferId BufferCache::CreateBuffer(uint64_t vaddr, uint64_t size) {
auto& command = m_scheduler.Current();
EXIT_IF(command.IsInvalid() || command.IsExecute());
auto begin = vaddr & ~(CACHING_PAGE_SIZE - 1);
auto end = (vaddr + size + CACHING_PAGE_SIZE - 1) & ~(CACHING_PAGE_SIZE - 1);
const auto next = m_buffers.upper_bound(vaddr);
if (next != m_buffers.begin()) {
const auto owner = std::prev(next);
auto& buffer = m_slot_buffers[owner->second];
if (buffer.IsInBounds(vaddr, size)) {
buffer.tick_accessed_last = m_gc_tick;
return owner->second;
}
}
auto merge = [&](const Buffer& buffer) {
const auto buffer_begin = buffer.CpuAddress();
const auto buffer_end = buffer_begin + buffer.Size();
if (begin >= buffer_end || buffer_begin >= end) {
return false;
}
begin = std::min(begin, buffer_begin);
end = std::max(end, buffer_end);
return true;
};
std::vector<BufferId> overlaps;
auto first = m_buffers.lower_bound(begin);
auto first = m_buffers.lower_bound(begin);
if (first != m_buffers.begin()) {
const auto previous = std::prev(first);
if (merge(m_slot_buffers[previous->second])) {
if (const auto& buffer = m_slot_buffers[previous->second];
buffer.CpuAddress() + buffer.Size() > begin) {
first = previous;
}
}
for (auto candidate = first; candidate != m_buffers.end(); ++candidate) {
if (candidate->first >= end) {
break;
}
if (merge(m_slot_buffers[candidate->second])) {
overlaps.push_back(candidate->second);
}
auto last = first;
for (; last != m_buffers.end() && last->first < end; ++last) {
const auto& buffer = m_slot_buffers[last->second];
begin = std::min(begin, buffer.CpuAddress());
end = std::max(end, buffer.CpuAddress() + buffer.Size());
}
const auto id = m_slot_buffers.insert(m_graphics, m_scheduler, MemoryUsage::DeviceLocal, begin,
@@ -416,17 +427,14 @@ BufferId BufferCache::FindBuffer(uint64_t vaddr, uint64_t size) {
buffer.tick_accessed_last = m_gc_tick;
SetVulkanObjectNameF(m_graphics.device, buffer.Handle(),
"Kyty.GameBuffer[guest=0x{:016x} size=0x{:x}]", begin, end - begin);
for (const auto overlap: overlaps) {
const auto& old = m_slot_buffers[overlap];
for (auto overlap = first; overlap != last;) {
const auto current = overlap++;
const auto old_id = current->second;
const auto& old = m_slot_buffers[old_id];
buffer.CopyFrom(command, old, 0, old.CpuAddress() - begin, old.Size());
DeleteBuffer(old_id);
}
for (const auto overlap: overlaps) {
DeleteBuffer(overlap);
}
m_total_used_memory += buffer.Size();
const auto [it, inserted] = m_buffers.emplace(begin, id);
(void)it;
EXIT_IF(!inserted);
Register(id);
return id;
}
@@ -544,13 +552,12 @@ std::pair<Buffer*, uint64_t> BufferCache::ObtainBufferForImage(uint64_t vaddr, u
EXIT("BufferCache: invalid image source\n");
}
auto find_owner = [&]() -> Buffer* {
auto owner = m_buffers.upper_bound(vaddr);
if (owner == m_buffers.begin()) {
const auto* owner = m_page_table.Find(vaddr >> PageTable::kPageBits);
if (owner == nullptr || !*owner) {
return nullptr;
}
--owner;
auto* buffer = m_slot_buffers.try_get(owner->second);
return buffer != nullptr && buffer->IsInBounds(vaddr, size) ? buffer : nullptr;
auto& buffer = m_slot_buffers[*owner];
return buffer.IsInBounds(vaddr, size) ? &buffer : nullptr;
};
{
@@ -565,14 +572,7 @@ std::pair<Buffer*, uint64_t> BufferCache::ObtainBufferForImage(uint64_t vaddr, u
if (!IsRegionRegistered(vaddr, size)) {
EXIT("BufferCache: GPU-dirty image source has no native buffer\n");
}
const auto id = FindBuffer(vaddr, size);
auto& buffer = m_slot_buffers[id];
owner = &buffer;
const auto resolved = m_buffers.find(buffer.CpuAddress());
if (resolved == m_buffers.end() || resolved->second != id ||
!buffer.IsInBounds(vaddr, size)) {
EXIT("BufferCache: merged image source does not contain the requested range\n");
}
owner = &m_slot_buffers[FindBuffer(vaddr, size)];
}
if (owner != nullptr && !cpu_modified && (!gpu_modified || has_dirty_buffer_source)) {
owner->tick_accessed_last = m_gc_tick;
src/graphics/host_gpu/renderer/cache/bufferCache.h
Vendored
+6
View File
@@ -6,6 +6,7 @@
#include "common/slotVector.h"
#include "graphics/host_gpu/memoryTracker.h"
#include "graphics/host_gpu/rangeSet.h"
#include "graphics/host_gpu/renderer/cache/multiLevelPageTable.h"
#include "graphics/host_gpu/renderer/cache/streamBuffer.h"
#include <map>
@@ -66,12 +67,16 @@ private:
struct DownloadCopy;
struct DownloadRange;
using PageTable = MultiLevelPageTable<BufferId, 14, 40, 16>;
static_assert(CACHING_PAGE_SIZE == (uint64_t {1} << PageTable::kPageBits));
static constexpr uint64_t DOWNLOAD_ALIGNMENT = 64;
[[nodiscard]] static constexpr uint64_t AlignDownload(uint64_t size) noexcept {
return (size + DOWNLOAD_ALIGNMENT - 1) & ~(DOWNLOAD_ALIGNMENT - 1);
}
[[nodiscard]] static std::pair<uint64_t, uint64_t> DownloadEnvelope(const DownloadCopy& copy);
void WriteDataBuffer(Buffer& buffer, uint64_t address, const void* source, uint64_t size);
[[nodiscard]] BufferId CreateBuffer(uint64_t vaddr, uint64_t size);
void Register(BufferId id);
void Unregister(BufferId id);
void DeleteBuffer(BufferId id);
[[nodiscard]] bool SynchronizeBuffer(Buffer& buffer, uint64_t vaddr, uint64_t size,
@@ -91,6 +96,7 @@ private:
Buffer m_gds_buffer;
Common::SlotVector<Buffer> m_slot_buffers;
std::map<uint64_t, BufferId> m_buffers;
PageTable m_page_table;
RangeSet m_gpu_modified_ranges;
MemoryTracker m_memory_tracker;
StreamBuffer m_staging_buffer;