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perf: sync only GPU-dirty readbacks

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This commit is contained in:
nmzik
2026-08-03 22:13:41 +02:00
parent e8752aca7e
commit 51d0e02543
13 changed files with 373 additions and 390 deletions
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src/graphics/host_gpu/memoryTracker.h
+17 -33
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@@ -29,45 +29,29 @@ public:
void MarkRegionAsGpuModified(uint64_t vaddr, uint64_t size);
void UnmarkRegionAsGpuModified(uint64_t vaddr, uint64_t size);
void UntrackMemory(uint64_t vaddr, uint64_t size);
// Removes protection from a range and flushes GPU-owned data when required.
template <typename Flush>
void InvalidateRegion(uint64_t vaddr, uint64_t size, Flush&& on_flush) {
void InvalidateRegion(uint64_t vaddr, uint64_t size, Flush&& on_flush) noexcept {
static_assert(std::is_invocable_v<Flush&>);
CheckNotInUploadCallback();
ValidateRange(vaddr, size);
const auto update_cpu_state = [this, vaddr, size] {
std::lock_guard access(m_access_mutex);
std::vector<RegionManager*> managers;
Iterate<false>(vaddr, size, [&](RegionManager* manager, uint64_t, uint64_t) {
managers.push_back(manager);
});
std::vector<std::unique_lock<TrackingSpinLock>> locks;
locks.reserve(managers.size());
for (auto* manager: managers) {
locks.emplace_back(manager->lock);
Iterate<false>(vaddr, size, [&](RegionManager* manager, uint64_t offset, uint64_t bytes) {
const bool should_flush = [&] {
// Perform both the GPU modification check and CPU state change with the lock in
// case the GPU thread is racing to mark the page modified. If a flush is needed,
// on_flush performs the CPU state change.
std::scoped_lock lock(manager->lock);
if (manager->IsModified<DirtySource::Gpu>(offset, bytes)) {
return true;
}
manager->ChangeState<DirtySource::Cpu, true>(manager->GetCpuAddr() + offset, bytes);
return false;
}();
if (should_flush) {
on_flush();
}
const bool gpu_modified = Iterate<false>(
vaddr, size, [](RegionManager* manager, uint64_t offset, uint64_t bytes) {
return manager->IsModified<DirtySource::Gpu>(offset, bytes);
});
if (gpu_modified) {
return true;
}
Iterate<false>(vaddr, size,
[](RegionManager* manager, uint64_t offset, uint64_t bytes) {
manager->ChangeState<DirtySource::Cpu, true>(
manager->GetCpuAddr() + offset, bytes);
});
return false;
};
if (!update_cpu_state()) {
return;
}
std::forward<Flush>(on_flush)();
if (update_cpu_state()) {
EXIT("memory invalidation retained GPU-owned pages\n");
}
});
}
#if KYTY_BUILD == KYTY_BUILD_DEBUG
void ValidateGpuDirtyPages(const RangeSet& dirty, uint64_t vaddr, uint64_t size,