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#include "aligned_page_pool.h"
#include <library/cpp/testing/unittest/registar.h>
#include <util/system/info.h>
#include <yql/essentials/utils/backtrace/backtrace.h>
namespace NKikimr {
namespace NMiniKQL {
namespace {
class TScopedMemoryMapper {
public:
static constexpr size_t EXTRA_SPACE_FOR_UNALIGNMENT = 1;
struct TUnmapEntry {
void* Addr;
size_t Size;
bool operator==(const TUnmapEntry& rhs) {
return std::tie(Addr, Size) == std::tie(rhs.Addr, rhs.Size);
}
};
TScopedMemoryMapper(bool aligned) {
Aligned_ = aligned;
TFakeMmap::OnMunmap = [this](void* addr, size_t s) {
Munmaps_.push_back({addr, s});
};
TFakeMmap::OnMmap = [this](size_t size) -> void* {
// Allocate more memory to ensure we have enough space for alignment
Storage_ = THolder<char, TDeleteArray>(new char[AlignUp(size + EXTRA_SPACE_FOR_UNALIGNMENT, TAlignedPagePool::POOL_PAGE_SIZE)]);
UNIT_ASSERT(Storage_.Get());
// Force TFakeMmap::Munmap to be called by returning a pointer that will always need adjustment
if (Aligned_) {
return PointerToAlignedMemory();
} else {
// Ensure the pointer is always unaligned by a fixed amount
void* ptr = PointerToAlignedMemory();
// Add EXTRA_SPACE_FOR_UNALIGNMENT to ensure it's unaligned
return static_cast<void*>(static_cast<char*>(ptr) + EXTRA_SPACE_FOR_UNALIGNMENT);
}
};
}
~TScopedMemoryMapper() {
TFakeMmap::OnMunmap = {};
TFakeMmap::OnMmap = {};
Storage_.Reset();
}
void* PointerToAlignedMemory() {
return AlignUp(Storage_.Get(), TAlignedPagePool::POOL_PAGE_SIZE);
}
size_t MunmapsSize() {
return Munmaps_.size();
}
TUnmapEntry Munmaps(size_t i) {
return Munmaps_[i];
}
private:
THolder<char, TDeleteArray> Storage_;
std::vector<TUnmapEntry> Munmaps_;
bool Aligned_;
};
}; // namespace
Y_UNIT_TEST_SUITE(TAlignedPagePoolTest) {
Y_UNIT_TEST(AlignedMmapPageSize) {
TAlignedPagePoolImpl<TFakeMmap>::ResetGlobalsUT();
TAlignedPagePoolImpl<TFakeMmap> alloc(__LOCATION__);
TScopedMemoryMapper mmapper(/*aligned=*/true);
auto size = TAlignedPagePool::POOL_PAGE_SIZE;
auto block = std::shared_ptr<void>(alloc.GetBlock(size), [&](void* addr) { alloc.ReturnBlock(addr, size); });
UNIT_ASSERT_EQUAL(0u, mmapper.MunmapsSize());
UNIT_ASSERT_VALUES_EQUAL(block.get(), mmapper.PointerToAlignedMemory());
UNIT_ASSERT_VALUES_EQUAL(alloc.GetFreePageCount(), TAlignedPagePool::ALLOC_AHEAD_PAGES);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetAllocated(), TAlignedPagePool::POOL_PAGE_SIZE + TAlignedPagePool::ALLOC_AHEAD_PAGES * TAlignedPagePool::POOL_PAGE_SIZE);
}
Y_UNIT_TEST(UnalignedMmapPageSize) {
TAlignedPagePoolImpl<TFakeMmap>::ResetGlobalsUT();
TAlignedPagePoolImpl<TFakeMmap> alloc(__LOCATION__);
TScopedMemoryMapper mmapper(/*aligned=*/false);
auto size = TAlignedPagePool::POOL_PAGE_SIZE;
auto block = std::shared_ptr<void>(alloc.GetBlock(size), [&](void* addr) { alloc.ReturnBlock(addr, size); });
UNIT_ASSERT_EQUAL(2, mmapper.MunmapsSize());
UNIT_ASSERT_EQUAL(TAlignedPagePool::POOL_PAGE_SIZE - TScopedMemoryMapper::EXTRA_SPACE_FOR_UNALIGNMENT, mmapper.Munmaps(0).Size);
UNIT_ASSERT_EQUAL(TScopedMemoryMapper::EXTRA_SPACE_FOR_UNALIGNMENT, mmapper.Munmaps(1).Size);
UNIT_ASSERT_VALUES_EQUAL(block.get(), (char*)mmapper.PointerToAlignedMemory() + TAlignedPagePool::POOL_PAGE_SIZE);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetFreePageCount(), TAlignedPagePool::ALLOC_AHEAD_PAGES - 1);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetAllocated(), TAlignedPagePool::POOL_PAGE_SIZE + (TAlignedPagePool::ALLOC_AHEAD_PAGES - 1) * TAlignedPagePool::POOL_PAGE_SIZE);
}
Y_UNIT_TEST(AlignedMmapUnalignedSize) {
TAlignedPagePoolImpl<TFakeMmap>::ResetGlobalsUT();
TAlignedPagePoolImpl<TFakeMmap> alloc(__LOCATION__);
auto smallSize = NSystemInfo::GetPageSize();
auto size = smallSize + 1024 * TAlignedPagePool::POOL_PAGE_SIZE;
TScopedMemoryMapper mmapper(/*aligned=*/true);
auto block = std::shared_ptr<void>(alloc.GetBlock(size), [&](void* addr) { alloc.ReturnBlock(addr, size); });
UNIT_ASSERT_EQUAL(2, mmapper.MunmapsSize());
auto expected0 = (TScopedMemoryMapper::TUnmapEntry{(char*)mmapper.PointerToAlignedMemory() + size, TAlignedPagePool::POOL_PAGE_SIZE - smallSize});
UNIT_ASSERT_EQUAL(expected0, mmapper.Munmaps(0));
auto expected1 = TScopedMemoryMapper::TUnmapEntry{
(char*)mmapper.PointerToAlignedMemory() + TAlignedPagePool::ALLOC_AHEAD_PAGES * TAlignedPagePool::POOL_PAGE_SIZE + size - smallSize,
smallSize};
UNIT_ASSERT_EQUAL(expected1, mmapper.Munmaps(1));
UNIT_ASSERT_VALUES_EQUAL(block.get(), mmapper.PointerToAlignedMemory());
UNIT_ASSERT_VALUES_EQUAL(alloc.GetFreePageCount(), TAlignedPagePool::ALLOC_AHEAD_PAGES - 1);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetAllocated(), size + (TAlignedPagePool::ALLOC_AHEAD_PAGES - 1) * TAlignedPagePool::POOL_PAGE_SIZE);
}
Y_UNIT_TEST(UnalignedMmapUnalignedSize) {
TAlignedPagePoolImpl<TFakeMmap>::ResetGlobalsUT();
TAlignedPagePoolImpl<TFakeMmap> alloc(__LOCATION__);
auto smallSize = NSystemInfo::GetPageSize();
auto size = smallSize + 1024 * TAlignedPagePool::POOL_PAGE_SIZE;
TScopedMemoryMapper mmapper(/*aligned=*/false);
auto block = std::shared_ptr<void>(alloc.GetBlock(size), [&](void* addr) { alloc.ReturnBlock(addr, size); });
UNIT_ASSERT_EQUAL(3, mmapper.MunmapsSize());
UNIT_ASSERT_EQUAL(TAlignedPagePool::POOL_PAGE_SIZE - TScopedMemoryMapper::EXTRA_SPACE_FOR_UNALIGNMENT, mmapper.Munmaps(0).Size);
UNIT_ASSERT_EQUAL(TAlignedPagePool::POOL_PAGE_SIZE - smallSize, mmapper.Munmaps(1).Size);
UNIT_ASSERT_EQUAL(smallSize + 1, mmapper.Munmaps(2).Size);
UNIT_ASSERT_VALUES_EQUAL(block.get(), (char*)mmapper.PointerToAlignedMemory() + TAlignedPagePool::POOL_PAGE_SIZE);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetFreePageCount(), TAlignedPagePool::ALLOC_AHEAD_PAGES - 2);
UNIT_ASSERT_VALUES_EQUAL(alloc.GetAllocated(), size + (TAlignedPagePool::ALLOC_AHEAD_PAGES - 2) * TAlignedPagePool::POOL_PAGE_SIZE);
}
Y_UNIT_TEST(YellowZoneSwitchesCorrectlyBlock) {
TAlignedPagePool::ResetGlobalsUT();
TAlignedPagePoolImpl alloc(__LOCATION__);
// choose relatively big chunk so ALLOC_AHEAD_PAGES don't affect the correctness of the test
auto size = 1024 * TAlignedPagePool::POOL_PAGE_SIZE;
alloc.SetLimit(size * 10);
// 50% allocated -> no yellow zone
auto block1 = alloc.GetBlock(size * 5);
UNIT_ASSERT_VALUES_EQUAL(false, alloc.IsMemoryYellowZoneEnabled());
// 70% allocated -> no yellow zone
auto block2 = alloc.GetBlock(size * 2);
UNIT_ASSERT_VALUES_EQUAL(false, alloc.IsMemoryYellowZoneEnabled());
// 90% allocated -> yellow zone is enabled (> 80%)
auto block3 = alloc.GetBlock(size * 2);
UNIT_ASSERT_VALUES_EQUAL(true, alloc.IsMemoryYellowZoneEnabled());
// 70% allocated -> yellow zone is still enabled (> 50%)
alloc.ReturnBlock(block3, size * 2);
UNIT_ASSERT_VALUES_EQUAL(true, alloc.IsMemoryYellowZoneEnabled());
// 50% allocated -> yellow zone is disabled
alloc.ReturnBlock(block2, size * 2);
UNIT_ASSERT_VALUES_EQUAL(false, alloc.IsMemoryYellowZoneEnabled());
// 0% allocated -> yellow zone is disabled
alloc.ReturnBlock(block1, size * 5);
UNIT_ASSERT_VALUES_EQUAL(false, alloc.IsMemoryYellowZoneEnabled());
}
Y_UNIT_TEST(YellowZoneZeroDivision) {
TAlignedPagePool::ResetGlobalsUT();
TAlignedPagePoolImpl alloc(__LOCATION__);
alloc.SetLimit(0);
UNIT_ASSERT_EQUAL(false, alloc.IsMemoryYellowZoneEnabled());
}
} // Y_UNIT_TEST_SUITE(TAlignedPagePoolTest)
} // namespace NMiniKQL
} // namespace NKikimr
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