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doris/be/test/olap/row_cursor_test.cpp
Xinyi Zou d9fe5f7b67 [enhancement](memory) Remove MemPool and replace it with Arena (#17820) 
Arena can replace MemPool in most scenarios. Except for memory reuse, MemPool supports reuse of previous memory chunks after clear, but Arena does not.

Some comparisons between MemPool and Arena:

 1. Expansion
     Arena is less than 128M index 2 alloc chunk; more than 128M memory, allocate 128M * n > `size`, n is equal to the minimum value that satisfies the expression;
     MemPool less than 512K index 2 alloc chunk, greater than 512K memory, separately apply for a `size` length chunk
     
     After Arena applied for a chunk larger than 128M last time, the minimum chunk applied for after that is 128M. Does this seem to be a waste of memory? MemPool is also similar. After the chunk of 512K was applied for last time, the minimum chunk of subsequent applications is 512K.

 2. Alignment
     MemPool defaults to 16 alignment, because memtable and other places that use int128 require 16 alignment;
     Arena has no default alignment;

 3. Memory reuse
     Arena only supports `rollback`, which reuses the memory of the current chunk, usually the memory requested last time.
     MemPool supports clear(), all chunks can be reused; or call ReturnPartialAllocation() to roll back the last requested memory; if the last chunk has no memory, search for the most free chunk for allocation

 4. Realloc
     Arena supports realloc contiguous memory; it also supports realloc contiguous memory from any position at the time of the last allocation. The difference between `alloc_continue` and `realloc` is:
         1. Alloc_continue does not need to specify the old size, but the default old size = head->pos - range_start
         2. alloc_continue supports expansion from range_start when additional_bytes is between head and pos, which is equivalent to reusing a part of memory, while realloc completely allocates a new memory
     MemPool does not support realloc, but supports transferring or absorbing chunks between two MemPools

 5. check mem limit
     MemPool checks the mem limit, and Arena checks at the Allocator layer.

 6. Support for ASAN
     Arena does something extra

 7. Error handling
     MemPool supports returning the error message of application failure directly through `Status`, and Arena throws Exception.
Tests that Arena can consider

 1. After the last applied chunk is larger than 128M, the minimum applied chunk is 128M, which seems to waste memory;

 2. Support clear, memory multiplexing;

 3. Increase the large list, alloc the memory larger than 128M, and the size is equal to `size`, so as to avoid the current chunk not being fully used, which is wasteful.

 4. In some cases, it may be possible to allocate backwards to find chunks t
2023-03-29 20:56:49 +08:00

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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#include "olap/row_cursor.h"
#include <gtest/gtest.h>
#include "common/object_pool.h"
#include "olap/schema.h"
#include "olap/tablet_schema.h"
#include "util/types.h"
namespace doris {
void set_tablet_schema_for_init(TabletSchemaSPtr tablet_schema) {
TabletSchemaPB tablet_schema_pb;
ColumnPB* column_1 = tablet_schema_pb.add_column();
column_1->set_unique_id(1);
column_1->set_name("column_1");
column_1->set_type("TINYINT");
column_1->set_is_key(true);
column_1->set_is_nullable(true);
column_1->set_length(1);
column_1->set_index_length(1);
ColumnPB* column_2 = tablet_schema_pb.add_column();
column_2->set_unique_id(2);
column_2->set_name("column_2");
column_2->set_type("SMALLINT");
column_2->set_is_key(true);
column_2->set_is_nullable(true);
column_2->set_length(2);
column_2->set_index_length(2);
column_2->set_default_value("0");
ColumnPB* column_3 = tablet_schema_pb.add_column();
column_3->set_unique_id(3);
column_3->set_name("column_3");
column_3->set_type("INT");
column_3->set_is_key(true);
column_3->set_is_nullable(true);
column_3->set_length(4);
column_3->set_index_length(4);
ColumnPB* column_4 = tablet_schema_pb.add_column();
column_4->set_unique_id(4);
column_4->set_name("column_4");
column_4->set_type("DATE");
column_4->set_is_key(true);
column_4->set_is_nullable(true);
column_4->set_length(3);
column_4->set_index_length(3);
ColumnPB* column_5 = tablet_schema_pb.add_column();
column_5->set_unique_id(5);
column_5->set_name("column_5");
column_5->set_type("DATETIME");
column_5->set_is_key(true);
column_5->set_is_nullable(true);
column_5->set_length(8);
column_5->set_index_length(8);
ColumnPB* column_6 = tablet_schema_pb.add_column();
column_6->set_unique_id(5);
column_6->set_name("column_6");
column_6->set_type("DATEV2");
column_6->set_is_key(true);
column_6->set_is_nullable(true);
column_6->set_length(4);
column_6->set_index_length(4);
ColumnPB* column_7 = tablet_schema_pb.add_column();
column_7->set_unique_id(6);
column_7->set_name("column_7");
column_7->set_type("DECIMAL");
column_7->set_is_key(true);
column_7->set_is_nullable(true);
column_7->set_length(12);
column_7->set_index_length(12);
column_7->set_frac(3);
column_7->set_precision(6);
ColumnPB* column_8 = tablet_schema_pb.add_column();
column_8->set_unique_id(7);
column_8->set_name("column_8");
column_8->set_type("CHAR");
column_8->set_is_key(true);
column_8->set_is_nullable(true);
column_8->set_length(4);
column_8->set_index_length(4);
column_8->set_default_value("char");
ColumnPB* column_9 = tablet_schema_pb.add_column();
column_9->set_unique_id(8);
column_9->set_name("column_9");
column_9->set_type("BIGINT");
column_9->set_is_nullable(true);
column_9->set_length(8);
column_9->set_aggregation("SUM");
column_9->set_is_key(false);
ColumnPB* column_10 = tablet_schema_pb.add_column();
column_10->set_unique_id(9);
column_10->set_name("column_10");
column_10->set_type("VARCHAR");
column_10->set_is_nullable(true);
column_10->set_length(16 + OLAP_VARCHAR_MAX_BYTES);
column_10->set_aggregation("REPLACE");
column_10->set_is_key(false);
ColumnPB* column_11 = tablet_schema_pb.add_column();
column_11->set_unique_id(10);
column_11->set_name("column_11");
column_11->set_type("LARGEINT");
column_11->set_is_nullable(true);
column_11->set_length(16);
column_11->set_aggregation("MAX");
column_11->set_is_key(false);
ColumnPB* column_12 = tablet_schema_pb.add_column();
column_12->set_unique_id(11);
column_12->set_name("column_12");
column_12->set_type("DECIMAL");
column_12->set_is_nullable(true);
column_12->set_length(12);
column_12->set_aggregation("MIN");
column_12->set_is_key(false);
ColumnPB* column_13 = tablet_schema_pb.add_column();
column_13->set_unique_id(12);
column_13->set_name("column_13");
column_13->set_type("HLL");
column_13->set_is_nullable(true);
column_13->set_length(HLL_COLUMN_DEFAULT_LEN);
column_13->set_aggregation("HLL_UNION");
column_13->set_is_key(false);
tablet_schema->init_from_pb(tablet_schema_pb);
}
void set_tablet_schema_for_scan_key(TabletSchemaSPtr tablet_schema) {
TabletSchemaPB tablet_schema_pb;
ColumnPB* column_1 = tablet_schema_pb.add_column();
column_1->set_unique_id(1);
column_1->set_name("column_1");
column_1->set_type("CHAR");
column_1->set_is_key(true);
column_1->set_is_nullable(true);
column_1->set_length(4);
column_1->set_index_length(4);
column_1->set_default_value("char");
ColumnPB* column_2 = tablet_schema_pb.add_column();
column_2->set_unique_id(2);
column_2->set_name("column_2");
column_2->set_type("VARCHAR");
column_2->set_is_key(true);
column_2->set_is_nullable(true);
column_2->set_length(16 + OLAP_VARCHAR_MAX_BYTES);
column_2->set_index_length(20);
ColumnPB* column_3 = tablet_schema_pb.add_column();
column_3->set_unique_id(3);
column_3->set_name("column_3");
column_3->set_type("LARGEINT");
column_3->set_is_nullable(true);
column_3->set_length(16);
column_3->set_aggregation("MAX");
column_3->set_is_key(false);
ColumnPB* column_4 = tablet_schema_pb.add_column();
column_4->set_unique_id(9);
column_4->set_name("column_4");
column_4->set_type("DECIMAL");
column_4->set_is_nullable(true);
column_4->set_length(12);
column_4->set_aggregation("MIN");
column_4->set_is_key(false);
tablet_schema->init_from_pb(tablet_schema_pb);
}
void set_tablet_schema_for_cmp_and_aggregate(TabletSchemaSPtr tablet_schema) {
TabletSchemaPB tablet_schema_pb;
ColumnPB* column_1 = tablet_schema_pb.add_column();
column_1->set_unique_id(1);
column_1->set_name("column_1");
column_1->set_type("CHAR");
column_1->set_is_key(true);
column_1->set_is_nullable(true);
column_1->set_length(4);
column_1->set_index_length(4);
column_1->set_default_value("char");
ColumnPB* column_2 = tablet_schema_pb.add_column();
column_2->set_unique_id(2);
column_2->set_name("column_2");
column_2->set_type("INT");
column_2->set_is_key(true);
column_2->set_is_nullable(true);
column_2->set_length(4);
column_2->set_index_length(4);
ColumnPB* column_3 = tablet_schema_pb.add_column();
column_3->set_unique_id(3);
column_3->set_name("column_3");
column_3->set_type("LARGEINT");
column_3->set_is_nullable(true);
column_3->set_length(16);
column_3->set_aggregation("SUM");
column_3->set_is_key(false);
ColumnPB* column_4 = tablet_schema_pb.add_column();
column_4->set_unique_id(9);
column_4->set_name("column_4");
column_4->set_type("DOUBLE");
column_4->set_is_nullable(true);
column_4->set_length(8);
column_4->set_aggregation("MIN");
column_4->set_is_key(false);
ColumnPB* column_5 = tablet_schema_pb.add_column();
column_5->set_unique_id(3);
column_5->set_name("column_5");
column_5->set_type("DECIMAL");
column_5->set_is_nullable(true);
column_5->set_length(12);
column_5->set_aggregation("MAX");
column_5->set_is_key(false);
ColumnPB* column_6 = tablet_schema_pb.add_column();
column_6->set_unique_id(9);
column_6->set_name("column_6");
column_6->set_type("VARCHAR");
column_6->set_is_nullable(true);
column_6->set_length(16 + OLAP_VARCHAR_MAX_BYTES);
column_6->set_aggregation("REPLACE");
column_6->set_is_key(false);
tablet_schema->init_from_pb(tablet_schema_pb);
}
class TestRowCursor : public testing::Test {
public:
TestRowCursor() { _arena.reset(new vectorized::Arena()); }
virtual void SetUp() {}
virtual void TearDown() {}
std::unique_ptr<vectorized::Arena> _arena;
};
TEST_F(TestRowCursor, InitRowCursor) {
TabletSchemaSPtr tablet_schema = std::make_shared<TabletSchema>();
set_tablet_schema_for_init(tablet_schema);
RowCursor row;
Status res = row.init(tablet_schema);
EXPECT_EQ(res, Status::OK());
EXPECT_EQ(row.get_fixed_len(), 131);
EXPECT_EQ(row.get_variable_len(), 20);
}
TEST_F(TestRowCursor, InitRowCursorWithColumnCount) {
TabletSchemaSPtr tablet_schema = std::make_shared<TabletSchema>();
set_tablet_schema_for_init(tablet_schema);
RowCursor row;
Status res = row.init(tablet_schema, 5);
EXPECT_EQ(res, Status::OK());
EXPECT_EQ(row.get_fixed_len(), 23);
EXPECT_EQ(row.get_variable_len(), 0);
}
TEST_F(TestRowCursor, InitRowCursorWithColIds) {
TabletSchemaSPtr tablet_schema = std::make_shared<TabletSchema>();
set_tablet_schema_for_init(tablet_schema);
std::vector<uint32_t> col_ids;
for (size_t i = 0; i < tablet_schema->num_columns() / 2; ++i) {
col_ids.push_back(i * 2);
}
RowCursor row;
Status res = row.init(tablet_schema, col_ids);
EXPECT_EQ(res, Status::OK());
EXPECT_EQ(row.get_fixed_len(), 55);
EXPECT_EQ(row.get_variable_len(), 0);
}
TEST_F(TestRowCursor, InitRowCursorWithScanKey) {
TabletSchemaSPtr tablet_schema = std::make_shared<TabletSchema>();
set_tablet_schema_for_scan_key(tablet_schema);
std::vector<std::string> scan_keys;
scan_keys.push_back("char_exceed_length");
scan_keys.push_back("varchar_exceed_length");
std::vector<uint32_t> columns {0, 1};
std::shared_ptr<Schema> schema = std::make_shared<Schema>(tablet_schema->columns(), columns);
RowCursor row;
Status res = row.init_scan_key(tablet_schema, scan_keys, schema);
EXPECT_EQ(res, Status::OK());
EXPECT_EQ(row.get_fixed_len(), 34);
EXPECT_EQ(row.get_variable_len(), 39);
OlapTuple tuple1(scan_keys);
res = row.from_tuple(tuple1);
EXPECT_EQ(res, Status::OK());
OlapTuple tuple2 = row.to_tuple();
EXPECT_TRUE(strncmp(tuple2.get_value(0).c_str(), "0&char_exceed_length", 20));
EXPECT_TRUE(strncmp(tuple2.get_value(1).c_str(), "0&varchar_exceed_length", 23));
}
TEST_F(TestRowCursor, FullKeyCmp) {
TabletSchemaSPtr tablet_schema = std::make_shared<TabletSchema>();
set_tablet_schema_for_cmp_and_aggregate(tablet_schema);
RowCursor left;
Status res = left.init(tablet_schema);
EXPECT_EQ(res, Status::OK());
EXPECT_EQ(left.get_fixed_len(), 78);
EXPECT_EQ(left.get_variable_len(), 20);
Slice l_char("well");
int32_t l_int = 10;
left.set_field_content(0, reinterpret_cast<char*>(&l_char), _arena.get());
left.set_field_content(1, reinterpret_cast<char*>(&l_int), _arena.get());
RowCursor right_eq;
res = right_eq.init(tablet_schema);
Slice r_char_eq("well");
int32_t r_int_eq = 10;
right_eq.set_field_content(0, reinterpret_cast<char*>(&r_char_eq), _arena.get());
right_eq.set_field_content(1, reinterpret_cast<char*>(&r_int_eq), _arena.get());
EXPECT_EQ(compare_row(left, right_eq), 0);
RowCursor right_lt;
res = right_lt.init(tablet_schema);
Slice r_char_lt("well");
int32_t r_int_lt = 11;
right_lt.set_field_content(0, reinterpret_cast<char*>(&r_char_lt), _arena.get());
right_lt.set_field_content(1, reinterpret_cast<char*>(&r_int_lt), _arena.get());
EXPECT_LT(compare_row(left, right_lt), 0);
RowCursor right_gt;
res = right_gt.init(tablet_schema);
Slice r_char_gt("good");
int32_t r_int_gt = 10;
right_gt.set_field_content(0, reinterpret_cast<char*>(&r_char_gt), _arena.get());
right_gt.set_field_content(1, reinterpret_cast<char*>(&r_int_gt), _arena.get());
EXPECT_GT(compare_row(left, right_gt), 0);
}
} // namespace doris
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