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Optimize bulk memory invalidation (#124)

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* Per page -> per range search (optimization)
This commit is contained in:
nmzik
2026-07-29 05:09:36 +02:00
committed by GitHub
parent 861729fc6c
commit f6e01e5403
16 changed files with 322 additions and 228 deletions
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tests/PageManagerTests.cpp
-31
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@@ -301,36 +301,6 @@ void TestSharedWatcherFault() {
Check(VirtualFree(memory, 0, MEM_RELEASE) != 0, "VirtualFree failed");
}
void TestMappedHostWriteRange() {
FaultContext context;
PageManager manager(InvalidateFault, &context);
context.manager = &manager;
const auto page_size = manager.GetPageSize();
auto *memory = Allocate(page_size * 3);
const auto address = reinterpret_cast<uint64_t>(memory);
manager.OnGpuMap(address, page_size);
manager.OnGpuMap(address + page_size * 2, page_size);
manager.UpdatePageWatchers(true, address, page_size);
manager.UpdatePageWatchers(true, address + page_size * 2, page_size);
Check(manager.HasAnyMapping(address + 16, page_size * 3 - 32),
"host-write range did not find partial GPU mappings");
Check(!manager.IsMapped(address, page_size * 3),
"partial GPU mappings were reported as a full mapping");
Check(manager.HandleWriteRange(address + 16, page_size * 3 - 32),
"mapped host-write range was not handled");
Check(context.calls.load(std::memory_order_relaxed) == 2,
"host-write range did not invalidate each mapped watched page");
Check(IsWritable(memory) && IsWritable(memory + page_size * 2),
"host-write range did not restore writable protection");
manager.OnGpuUnmap(address, page_size);
manager.OnGpuUnmap(address + page_size * 2, page_size);
Check(!manager.HasAnyMapping(address, page_size * 3),
"host-write range retained stale GPU mappings");
Check(VirtualFree(memory, 0, MEM_RELEASE) != 0, "VirtualFree failed");
}
void TestReadWriteWatcherFault() {
FaultContext context;
PageManager manager(InvalidateFault, &context);
@@ -855,7 +825,6 @@ int main(int argc, char **argv) {
}
TestWatchFaultAndUnwatch();
TestSharedWatcherFault();
TestMappedHostWriteRange();
TestReadWriteWatcherFault();
TestPermittedMappedLateFaultsResume();
TestPartialMappingUnmapPreservesTokens();