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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/datastore/array_store_dynamic_type_mapper.h>
#include <vespa/vespalib/gtest/gtest.h>
#include <vespa/vespalib/util/size_literals.h>
#include <limits>
using vespalib::datastore::ArrayStoreDynamicTypeMapper;
namespace {
constexpr double default_grow_factor = 1.03;
constexpr size_t default_max_buffer_size = 256_Mi;
constexpr size_t small_max_buffer_size = 256_Ki;
constexpr size_t max_max_buffer_size = std::numeric_limits<uint32_t>::max();
}
template <typename ElemT>
class TestBase : public testing::Test
{
protected:
ArrayStoreDynamicTypeMapper<ElemT> _mapper;
TestBase();
~TestBase() override;
std::vector<size_t> get_array_sizes(uint32_t num_array_sizes);
std::vector<size_t> get_entry_sizes(uint32_t num_entry_sizes);
std::vector<size_t> get_large_array_sizes(uint32_t num_large_arrays);
void select_type_ids(std::vector<size_t> array_sizes);
void setup_mapper(uint32_t max_buffer_type_id, double grow_factor);
static uint32_t calc_max_buffer_type_id(double grow_factor, size_t max_buffer_size = default_max_buffer_size);
};
template <typename ElemT>
TestBase<ElemT>::TestBase()
: testing::Test(),
_mapper(5, default_grow_factor, default_max_buffer_size)
{
}
template <typename ElemT>
TestBase<ElemT>::~TestBase() = default;
template <typename ElemT>
void
TestBase<ElemT>::setup_mapper(uint32_t max_buffer_type_id, double grow_factor)
{
_mapper = ArrayStoreDynamicTypeMapper<ElemT>(max_buffer_type_id, grow_factor, default_max_buffer_size);
}
template <typename ElemT>
std::vector<size_t>
TestBase<ElemT>::get_array_sizes(uint32_t num_array_sizes)
{
std::vector<size_t> array_sizes;
for (uint32_t type_id = 1; type_id <= num_array_sizes; ++type_id) {
array_sizes.emplace_back(_mapper.get_array_size(type_id));
}
return array_sizes;
}
template <typename ElemT>
std::vector<size_t>
TestBase<ElemT>::get_entry_sizes(uint32_t num_entry_sizes)
{
std::vector<size_t> entry_sizes;
for (uint32_t type_id = 1; type_id <= num_entry_sizes; ++type_id) {
entry_sizes.emplace_back(_mapper.get_entry_size(type_id));
}
return entry_sizes;
}
template <typename ElemT>
std::vector<size_t>
TestBase<ElemT>::get_large_array_sizes(uint32_t num_large_array_sizes)
{
setup_mapper(num_large_array_sizes * 100, default_grow_factor);
std::vector<size_t> result;
for (uint32_t i = 0; i < num_large_array_sizes; ++i) {
uint32_t type_id = (i + 1) * 100;
auto array_size = _mapper.get_array_size(type_id);
result.emplace_back(array_size);
EXPECT_EQ(type_id, _mapper.get_type_id(array_size));
EXPECT_EQ(type_id, _mapper.get_type_id(array_size - 1));
if (i + 1 == num_large_array_sizes) {
EXPECT_EQ(0u, _mapper.get_type_id(array_size + 1));
} else {
EXPECT_EQ(type_id + 1, _mapper.get_type_id(array_size + 1));
}
}
return result;
}
template <typename ElemT>
void
TestBase<ElemT>::select_type_ids(std::vector<size_t> array_sizes)
{
uint32_t type_id = 0;
std::optional<size_t> prev_array_size;
for (auto array_size : array_sizes) {
++type_id;
EXPECT_EQ(type_id, _mapper.get_type_id(array_size));
if (!prev_array_size.has_value() || prev_array_size.value() < array_size - 1) {
EXPECT_EQ(type_id, _mapper.get_type_id(array_size - 1));
} else {
EXPECT_EQ(type_id - 1, _mapper.get_type_id(array_size - 1));
}
prev_array_size = array_size;
if (array_size == array_sizes.back()) {
// Fallback to indirect storage, using type id 0
EXPECT_EQ(0u, _mapper.get_type_id(array_size + 1));
} else {
EXPECT_EQ(type_id + 1, _mapper.get_type_id(array_size + 1));
}
}
}
template <typename ElemT>
uint32_t
TestBase<ElemT>::calc_max_buffer_type_id(double grow_factor, size_t max_buffer_size)
{
ArrayStoreDynamicTypeMapper<ElemT> mapper(1000, grow_factor, max_buffer_size);
return mapper.get_max_type_id(1000);
}
using ArrayStoreDynamicTypeMapperCharTest = TestBase<char>;
TEST_F(ArrayStoreDynamicTypeMapperCharTest, array_sizes_are_calculated)
{
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5}), get_array_sizes(5));
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5}), get_entry_sizes(5));
setup_mapper(10, 1.4);
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5, 8, 12, 16, 24, 36}), get_array_sizes(10));
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5, 12, 16, 20, 28, 40}), get_entry_sizes(10));
}
TEST_F(ArrayStoreDynamicTypeMapperCharTest, type_ids_are_selected)
{
select_type_ids({1, 2, 3, 4, 5});
setup_mapper(10, 1.4);
select_type_ids({1, 2, 3, 4, 5, 8, 12, 16, 24, 36});
}
TEST_F(ArrayStoreDynamicTypeMapperCharTest, large_arrays_grows_exponentially)
{
EXPECT_EQ((std::vector<size_t>{232, 5024, 97100, 1866776}), get_large_array_sizes(4));
}
TEST_F(ArrayStoreDynamicTypeMapperCharTest, avoid_entry_size_overflow)
{
EXPECT_EQ(29, calc_max_buffer_type_id(2.0));
EXPECT_EQ(367, calc_max_buffer_type_id(1.05));
EXPECT_EQ(454, calc_max_buffer_type_id(1.04));
EXPECT_EQ(591, calc_max_buffer_type_id(1.03));
EXPECT_EQ(357, calc_max_buffer_type_id(1.03, small_max_buffer_size));
EXPECT_EQ(661, calc_max_buffer_type_id(1.03, max_max_buffer_size));
EXPECT_EQ(863, calc_max_buffer_type_id(1.02));
}
using ArrayStoreDynamicTypeMapperInt32Test = TestBase<int32_t>;
TEST_F(ArrayStoreDynamicTypeMapperInt32Test, array_sizes_are_calculated)
{
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5}), get_array_sizes(5));
EXPECT_EQ((std::vector<size_t>{4, 8, 12, 16, 20}), get_entry_sizes(5));
setup_mapper(10, 1.4);
EXPECT_EQ((std::vector<size_t>{1, 2, 3, 4, 5, 7, 9, 12, 16, 22}), get_array_sizes(10));
EXPECT_EQ((std::vector<size_t>{4, 8, 12, 16, 20, 32, 40, 52, 68, 92}), get_entry_sizes(10));
}
TEST_F(ArrayStoreDynamicTypeMapperInt32Test, avoid_entry_size_overflow)
{
EXPECT_EQ(27, calc_max_buffer_type_id(2.0));
EXPECT_EQ(337, calc_max_buffer_type_id(1.05));
EXPECT_EQ(409, calc_max_buffer_type_id(1.04));
EXPECT_EQ(525, calc_max_buffer_type_id(1.03));
EXPECT_EQ(291, calc_max_buffer_type_id(1.03, small_max_buffer_size));
EXPECT_EQ(596, calc_max_buffer_type_id(1.03, max_max_buffer_size));
EXPECT_EQ(744, calc_max_buffer_type_id(1.02));
}
GTEST_MAIN_RUN_ALL_TESTS()
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