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doris/be/test/exec/partitioned_hash_table_test.cpp
chenhao7253886 37b4cafe87 Change variable and namespace name in BE (#268) 
Change 'palo' to 'doris'
2018-11-02 10:22:32 +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 "exec/partitioned_hash_table.inline.h"
#include <boost/scoped_ptr.hpp>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <gtest/gtest.h>
#include "common/compiler_util.h"
#include "exprs/expr.h"
#include "exprs/expr_context.h"
#include "exprs/slot_ref.h"
#include "runtime/mem_pool.h"
#include "runtime/mem_tracker.h"
#include "runtime/string_value.h"
#include "runtime/test_env.h"
#include "util/cpu_info.h"
#include "util/disk_info.h"
#include "util/runtime_profile.h"
using std::vector;
using std::map;
using boost::scoped_ptr;
namespace doris {
class PartitionedHashTableTest : public testing::Test {
public:
PartitionedHashTableTest() : _limit(-1), _mem_pool(&_limit) {}
~PartitionedHashTableTest() {}
protected:
scoped_ptr<TestEnv> _test_env;
RuntimeState* _runtime_state;
ObjectPool _pool;
MemTracker _tracker;
MemTracker _limit;
MemPool _mem_pool;
vector<ExprContext*> _build_expr_ctxs;
vector<ExprContext*> _probe_expr_ctxs;
virtual void SetUp() {
_test_env.reset(new TestEnv());
RowDescriptor desc;
Status status;
// Not very easy to test complex tuple layouts so this test will use the
// simplest. The purpose of these tests is to exercise the hash map
// internals so a simple build/probe expr is fine.
Expr* expr = _pool.add(new SlotRef(TYPE_INT, 0));
_build_expr_ctxs.push_back(_pool.add(new ExprContext(expr)));
status = Expr::prepare(_build_expr_ctxs, NULL, desc, &_tracker);
EXPECT_TRUE(status.ok());
status = Expr::open(_build_expr_ctxs, NULL);
EXPECT_TRUE(status.ok());
expr = _pool.add(new SlotRef(TYPE_INT, 0));
_probe_expr_ctxs.push_back(_pool.add(new ExprContext(expr)));
status = Expr::prepare(_probe_expr_ctxs, NULL, desc, &_tracker);
EXPECT_TRUE(status.ok());
status = Expr::open(_probe_expr_ctxs, NULL);
EXPECT_TRUE(status.ok());
}
virtual void TearDown() {
Expr::close(_build_expr_ctxs, NULL);
Expr::close(_probe_expr_ctxs, NULL);
_runtime_state = NULL;
_test_env.reset();
_mem_pool.free_all();
}
TupleRow* CreateTupleRow(int32_t val) {
uint8_t* tuple_row_mem = _mem_pool.allocate(sizeof(int32_t*));
Tuple* tuple_mem = Tuple::create(sizeof(int32_t), &_mem_pool);
*reinterpret_cast<int32_t*>(tuple_mem) = val;
TupleRow* row = reinterpret_cast<TupleRow*>(tuple_row_mem);
row->set_tuple(0, tuple_mem);
return row;
}
// Wrapper to call private methods on PartitionedHashTable
// TODO: understand google testing, there must be a more natural way to do this
void ResizeTable(
PartitionedHashTable* table, int64_t new_size, PartitionedHashTableCtx* ht_ctx) {
table->resize_buckets(new_size, ht_ctx);
}
// Do a full table scan on table. All values should be between [min,max). If
// all_unique, then each key(int value) should only appear once. Results are
// stored in results, indexed by the key. Results must have been preallocated to
// be at least max size.
void FullScan(PartitionedHashTable* table, PartitionedHashTableCtx* ht_ctx, int min, int max,
bool all_unique, TupleRow** results, TupleRow** expected) {
PartitionedHashTable::Iterator iter = table->begin(ht_ctx);
while (!iter.at_end()) {
TupleRow* row = iter.get_row();
int32_t val = *reinterpret_cast<int32_t*>(_build_expr_ctxs[0]->get_value(row));
EXPECT_GE(val, min);
EXPECT_LT(val, max);
if (all_unique) {
EXPECT_TRUE(results[val] == NULL);
}
EXPECT_EQ(row->get_tuple(0), expected[val]->get_tuple(0));
results[val] = row;
iter.next();
}
}
// Validate that probe_row evaluates overs probe_exprs is equal to build_row
// evaluated over build_exprs
void ValidateMatch(TupleRow* probe_row, TupleRow* build_row) {
EXPECT_TRUE(probe_row != build_row);
int32_t build_val =
*reinterpret_cast<int32_t*>(_build_expr_ctxs[0]->get_value(probe_row));
int32_t probe_val =
*reinterpret_cast<int32_t*>(_probe_expr_ctxs[0]->get_value(build_row));
EXPECT_EQ(build_val, probe_val);
}
struct ProbeTestData {
TupleRow* probe_row;
vector<TupleRow*> expected_build_rows;
};
void ProbeTest(PartitionedHashTable* table, PartitionedHashTableCtx* ht_ctx,
ProbeTestData* data, int num_data, bool scan) {
uint32_t hash = 0;
for (int i = 0; i < num_data; ++i) {
TupleRow* row = data[i].probe_row;
PartitionedHashTable::Iterator iter;
if (ht_ctx->eval_and_hash_probe(row, &hash)) {
continue;
}
iter = table->find(ht_ctx, hash);
if (data[i].expected_build_rows.size() == 0) {
EXPECT_TRUE(iter.at_end());
} else {
if (scan) {
map<TupleRow*, bool> matched;
while (!iter.at_end()) {
EXPECT_EQ(matched.find(iter.get_row()), matched.end());
matched[iter.get_row()] = true;
iter.next();
}
EXPECT_EQ(matched.size(), data[i].expected_build_rows.size());
for (int j = 0; i < data[j].expected_build_rows.size(); ++j) {
EXPECT_TRUE(matched[data[i].expected_build_rows[j]]);
}
} else {
EXPECT_EQ(data[i].expected_build_rows.size(), 1);
EXPECT_EQ(data[i].expected_build_rows[0]->get_tuple(0),
iter.get_row()->get_tuple(0));
ValidateMatch(row, iter.get_row());
}
}
}
}
// Construct hash table with custom block manager. Returns result of PartitionedHashTable::init()
bool CreateHashTable(bool quadratic, int64_t initial_num_buckets,
scoped_ptr<PartitionedHashTable>* table, int block_size = 8 * 1024 * 1024,
int max_num_blocks = 100, int reserved_blocks = 10) {
EXPECT_TRUE(_test_env->create_query_state(0, max_num_blocks, block_size,
&_runtime_state).ok());
_runtime_state->init_mem_trackers(TUniqueId());
BufferedBlockMgr2::Client* client;
EXPECT_TRUE(_runtime_state->block_mgr2()->register_client(reserved_blocks, &_limit,
_runtime_state, &client).ok());
// Initial_num_buckets must be a power of two.
EXPECT_EQ(initial_num_buckets, BitUtil::next_power_of_two(initial_num_buckets));
int64_t max_num_buckets = 1L << 31;
table->reset(new PartitionedHashTable(quadratic, _runtime_state, client, 1, NULL,
max_num_buckets, initial_num_buckets));
return (*table)->init();
}
// Constructs and closes a hash table.
void SetupTest(bool quadratic, int64_t initial_num_buckets, bool too_big) {
TupleRow* build_row1 = CreateTupleRow(1);
TupleRow* build_row2 = CreateTupleRow(2);
TupleRow* probe_row3 = CreateTupleRow(3);
TupleRow* probe_row4 = CreateTupleRow(4);
int32_t* val_row1 =
reinterpret_cast<int32_t*>(_build_expr_ctxs[0]->get_value(build_row1));
EXPECT_EQ(*val_row1, 1);
int32_t* val_row2 =
reinterpret_cast<int32_t*>(_build_expr_ctxs[0]->get_value(build_row2));
EXPECT_EQ(*val_row2, 2);
int32_t* val_row3 =
reinterpret_cast<int32_t*>(_probe_expr_ctxs[0]->get_value(probe_row3));
EXPECT_EQ(*val_row3, 3);
int32_t* val_row4 =
reinterpret_cast<int32_t*>(_probe_expr_ctxs[0]->get_value(probe_row4));
EXPECT_EQ(*val_row4, 4);
// Create and close the hash table.
scoped_ptr<PartitionedHashTable> hash_table;
bool initialized = CreateHashTable(quadratic, initial_num_buckets, &hash_table);
EXPECT_EQ(too_big, !initialized);
hash_table->close();
}
// This test inserts the build rows [0->5) to hash table. It validates that they
// are all there using a full table scan. It also validates that find() is correct
// testing for probe rows that are both there and not.
// The hash table is resized a few times and the scans/finds are tested again.
void BasicTest(bool quadratic, int initial_num_buckets) {
TupleRow* build_rows[5];
TupleRow* scan_rows[5] = {0};
for (int i = 0; i < 5; ++i) {
build_rows[i] = CreateTupleRow(i);
}
ProbeTestData probe_rows[10];
for (int i = 0; i < 10; ++i) {
probe_rows[i].probe_row = CreateTupleRow(i);
if (i < 5) {
probe_rows[i].expected_build_rows.push_back(build_rows[i]);
}
}
// Create the hash table and Insert the build rows
scoped_ptr<PartitionedHashTable> hash_table;
ASSERT_TRUE(CreateHashTable(quadratic, initial_num_buckets, &hash_table));
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 0, 1);
uint32_t hash = 0;
bool success = hash_table->check_and_resize(5, &ht_ctx);
ASSERT_TRUE(success);
for (int i = 0; i < 5; ++i) {
if (!ht_ctx.eval_and_hash_build(build_rows[i], &hash)) {
continue;
}
bool inserted = hash_table->insert(&ht_ctx, build_rows[i]->get_tuple(0), hash);
EXPECT_TRUE(inserted);
}
EXPECT_EQ(hash_table->size(), 5);
// Do a full table scan and validate returned pointers
FullScan(hash_table.get(), &ht_ctx, 0, 5, true, scan_rows, build_rows);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, 10, false);
// Double the size of the hash table and scan again.
ResizeTable(hash_table.get(), 2048, &ht_ctx);
EXPECT_EQ(hash_table->num_buckets(), 2048);
EXPECT_EQ(hash_table->size(), 5);
memset(scan_rows, 0, sizeof(scan_rows));
FullScan(hash_table.get(), &ht_ctx, 0, 5, true, scan_rows, build_rows);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, 10, false);
// Try to shrink and scan again.
ResizeTable(hash_table.get(), 64, &ht_ctx);
EXPECT_EQ(hash_table->num_buckets(), 64);
EXPECT_EQ(hash_table->size(), 5);
memset(scan_rows, 0, sizeof(scan_rows));
FullScan(hash_table.get(), &ht_ctx, 0, 5, true, scan_rows, build_rows);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, 10, false);
// Resize to 8, which is the smallest value to fit the number of filled buckets.
ResizeTable(hash_table.get(), 8, &ht_ctx);
EXPECT_EQ(hash_table->num_buckets(), 8);
EXPECT_EQ(hash_table->size(), 5);
memset(scan_rows, 0, sizeof(scan_rows));
FullScan(hash_table.get(), &ht_ctx, 0, 5, true, scan_rows, build_rows);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, 10, false);
hash_table->close();
ht_ctx.close();
}
void ScanTest(bool quadratic, int initial_size, int rows_to_insert,
int additional_rows) {
scoped_ptr<PartitionedHashTable> hash_table;
ASSERT_TRUE(CreateHashTable(quadratic, initial_size, &hash_table));
int total_rows = rows_to_insert + additional_rows;
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 0, 1);
// Add 1 row with val 1, 2 with val 2, etc.
vector<TupleRow*> build_rows;
ProbeTestData* probe_rows = new ProbeTestData[total_rows];
probe_rows[0].probe_row = CreateTupleRow(0);
uint32_t hash = 0;
for (int val = 1; val <= rows_to_insert; ++val) {
bool success = hash_table->check_and_resize(val, &ht_ctx);
EXPECT_TRUE(success) << " failed to resize: " << val;
probe_rows[val].probe_row = CreateTupleRow(val);
for (int i = 0; i < val; ++i) {
TupleRow* row = CreateTupleRow(val);
if (!ht_ctx.eval_and_hash_build(row, &hash)) {
continue;
}
hash_table->insert(&ht_ctx, row->get_tuple(0), hash);
build_rows.push_back(row);
probe_rows[val].expected_build_rows.push_back(row);
}
}
// Add some more probe rows that aren't there.
for (int val = rows_to_insert; val < rows_to_insert + additional_rows; ++val) {
probe_rows[val].probe_row = CreateTupleRow(val);
}
// Test that all the builds were found.
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, total_rows, true);
// Resize and try again.
int target_size = BitUtil::next_power_of_two(2 * total_rows);
ResizeTable(hash_table.get(), target_size, &ht_ctx);
EXPECT_EQ(hash_table->num_buckets(), target_size);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, total_rows, true);
target_size = BitUtil::next_power_of_two(total_rows + 1);
ResizeTable(hash_table.get(), target_size, &ht_ctx);
EXPECT_EQ(hash_table->num_buckets(), target_size);
ProbeTest(hash_table.get(), &ht_ctx, probe_rows, total_rows, true);
delete [] probe_rows;
hash_table->close();
ht_ctx.close();
}
// This test continues adding tuples to the hash table and exercises the resize code
// paths.
void GrowTableTest(bool quadratic) {
uint64_t num_to_add = 4;
int expected_size = 0;
// MemTracker tracker(100 * 1024 * 1024);
MemTracker tracker(100 * 1024 * 1024);
scoped_ptr<PartitionedHashTable> hash_table;
ASSERT_TRUE(CreateHashTable(quadratic, num_to_add, &hash_table));
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 0, 1);
// Inserts num_to_add + (num_to_add^2) + (num_to_add^4) + ... + (num_to_add^20)
// entries. When num_to_add == 4, then the total number of inserts is 4194300.
int build_row_val = 0;
uint32_t hash = 0;
bool done_inserting = false;
for (int i = 0; i < 20; ++i) {
// Currently the mem used for the bucket is not being tracked by the mem tracker.
// Thus the resize is expected to be successful.
// TODO: Keep track of the mem used for the buckets and test cases where we actually
// hit OOM.
// TODO: Insert duplicates to also hit OOM.
bool success = hash_table->check_and_resize(num_to_add, &ht_ctx);
EXPECT_TRUE(success) << " failed to resize: " << num_to_add;
for (int j = 0; j < num_to_add; ++build_row_val, ++j) {
TupleRow* row = CreateTupleRow(build_row_val);
if (!ht_ctx.eval_and_hash_build(row, &hash)) {
continue;
}
bool inserted = hash_table->insert(&ht_ctx, row->get_tuple(0), hash);
if (!inserted) {
done_inserting = true;
break;
}
}
if (done_inserting) {
break;
}
expected_size += num_to_add;
num_to_add *= 2;
}
EXPECT_FALSE(tracker.limit_exceeded());
EXPECT_EQ(hash_table->size(), 4194300);
// Validate that we can find the entries before we went over the limit
for (int i = 0; i < expected_size * 5; i += 100000) {
TupleRow* probe_row = CreateTupleRow(i);
if (!ht_ctx.eval_and_hash_probe(probe_row, &hash)) {
continue;
}
PartitionedHashTable::Iterator iter = hash_table->find(&ht_ctx, hash);
if (i < hash_table->size()) {
EXPECT_TRUE(!iter.at_end()) << " i: " << i;
ValidateMatch(probe_row, iter.get_row());
} else {
EXPECT_TRUE(iter.at_end()) << " i: " << i;
}
}
hash_table->close();
ht_ctx.close();
}
// This test inserts and probes as many elements as the size of the hash table without
// calling resize. All the inserts and probes are expected to succeed, because there is
// enough space in the hash table (it is also expected to be slow). It also expects that
// a probe for a N+1 element will return BUCKET_NOT_FOUND.
void InsertFullTest(bool quadratic, int table_size) {
scoped_ptr<PartitionedHashTable> hash_table;
ASSERT_TRUE(CreateHashTable(quadratic, table_size, &hash_table));
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 0, 1);
EXPECT_EQ(hash_table->empty_buckets(), table_size);
// Insert and probe table_size different tuples. All of them are expected to be
// successfully inserted and probed.
uint32_t hash = 0;
PartitionedHashTable::Iterator iter;
bool found = false;
for (int build_row_val = 0; build_row_val < table_size; ++build_row_val) {
TupleRow* row = CreateTupleRow(build_row_val);
bool passes = ht_ctx.eval_and_hash_build(row, &hash);
EXPECT_TRUE(passes);
// Insert using both insert() and find_bucket() methods.
if (build_row_val % 2 == 0) {
bool inserted = hash_table->insert(&ht_ctx, row->get_tuple(0), hash);
EXPECT_TRUE(inserted);
} else {
iter = hash_table->find_bucket(&ht_ctx, hash, &found);
EXPECT_FALSE(iter.at_end());
EXPECT_FALSE(found);
iter.set_tuple(row->get_tuple(0), hash);
}
EXPECT_EQ(hash_table->empty_buckets(), table_size - build_row_val - 1);
passes = ht_ctx.eval_and_hash_probe(row, &hash);
EXPECT_TRUE(passes);
iter = hash_table->find(&ht_ctx, hash);
EXPECT_FALSE(iter.at_end());
EXPECT_EQ(row->get_tuple(0), iter.get_tuple());
iter = hash_table->find_bucket(&ht_ctx, hash, &found);
EXPECT_FALSE(iter.at_end());
EXPECT_TRUE(found);
EXPECT_EQ(row->get_tuple(0), iter.get_tuple());
}
// Probe for a tuple that does not exist. This should exercise the probe of a full
// hash table code path.
EXPECT_EQ(hash_table->empty_buckets(), 0);
TupleRow* probe_row = CreateTupleRow(table_size);
bool passes = ht_ctx.eval_and_hash_probe(probe_row, &hash);
EXPECT_TRUE(passes);
iter = hash_table->find(&ht_ctx, hash);
EXPECT_TRUE(iter.at_end());
// Since hash_table is full, find_bucket cannot find an empty bucket, so returns End().
iter = hash_table->find_bucket(&ht_ctx, hash, &found);
EXPECT_TRUE(iter.at_end());
EXPECT_FALSE(found);
hash_table->close();
ht_ctx.close();
}
// This test makes sure we can tolerate the low memory case where we do not have enough
// memory to allocate the array of buckets for the hash table.
void VeryLowMemTest(bool quadratic) {
const int block_size = 2 * 1024;
const int max_num_blocks = 1;
const int reserved_blocks = 0;
const int table_size = 1024;
scoped_ptr<PartitionedHashTable> hash_table;
ASSERT_FALSE(CreateHashTable(quadratic, table_size, &hash_table, block_size,
max_num_blocks, reserved_blocks));
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 0, 1);
PartitionedHashTable::Iterator iter = hash_table->begin(&ht_ctx);
EXPECT_TRUE(iter.at_end());
hash_table->close();
}
};
TEST_F(PartitionedHashTableTest, LinearSetupTest) {
SetupTest(false, 1, false);
SetupTest(false, 1024, false);
SetupTest(false, 65536, false);
// Regression test for IMPALA-2065. Trying to init a hash table with large (>2^31)
// number of buckets.
SetupTest(false, 4294967296, true); // 2^32
}
TEST_F(PartitionedHashTableTest, QuadraticSetupTest) {
SetupTest(true, 1, false);
SetupTest(true, 1024, false);
SetupTest(true, 65536, false);
// Regression test for IMPALA-2065. Trying to init a hash table with large (>2^31)
// number of buckets.
SetupTest(true, 4294967296, true); // 2^32
}
TEST_F(PartitionedHashTableTest, LinearBasicTest) {
BasicTest(false, 1);
BasicTest(false, 1024);
BasicTest(false, 65536);
}
TEST_F(PartitionedHashTableTest, QuadraticBasicTest) {
BasicTest(true, 1);
BasicTest(true, 1024);
BasicTest(true, 65536);
}
// This test makes sure we can scan ranges of buckets.
TEST_F(PartitionedHashTableTest, LinearScanTest) {
ScanTest(false, 1, 10, 5);
ScanTest(false, 1024, 1000, 5);
ScanTest(false, 1024, 1000, 500);
}
TEST_F(PartitionedHashTableTest, QuadraticScanTest) {
ScanTest(true, 1, 10, 5);
ScanTest(true, 1024, 1000, 5);
ScanTest(true, 1024, 1000, 500);
}
TEST_F(PartitionedHashTableTest, LinearGrowTableTest) {
GrowTableTest(false);
}
TEST_F(PartitionedHashTableTest, QuadraticGrowTableTest) {
GrowTableTest(true);
}
TEST_F(PartitionedHashTableTest, LinearInsertFullTest) {
InsertFullTest(false, 1);
InsertFullTest(false, 4);
InsertFullTest(false, 64);
InsertFullTest(false, 1024);
InsertFullTest(false, 65536);
}
TEST_F(PartitionedHashTableTest, QuadraticInsertFullTest) {
InsertFullTest(true, 1);
InsertFullTest(true, 4);
InsertFullTest(true, 64);
InsertFullTest(true, 1024);
InsertFullTest(true, 65536);
}
// Test that hashing empty string updates hash value.
TEST_F(PartitionedHashTableTest, HashEmpty) {
PartitionedHashTableCtx ht_ctx(_build_expr_ctxs, _probe_expr_ctxs, false, false, 1, 2, 1);
uint32_t seed = 9999;
ht_ctx.set_level(0);
EXPECT_NE(seed, ht_ctx.hash_help(NULL, 0, seed));
// TODO: level 0 uses CRC hash, which only swaps bytes around on empty input.
// EXPECT_NE(seed, ht_ctx.hash_help(NULL, 0, ht_ctx.hash_help(NULL, 0, seed)));
ht_ctx.set_level(1);
EXPECT_NE(seed, ht_ctx.hash_help(NULL, 0, seed));
EXPECT_NE(seed, ht_ctx.hash_help(NULL, 0, ht_ctx.hash_help(NULL, 0, seed)));
ht_ctx.close();
}
TEST_F(PartitionedHashTableTest, VeryLowMemTest) {
VeryLowMemTest(true);
VeryLowMemTest(false);
}
#if 0
#endif
} // end namespace doris
int main(int argc, char** argv) {
// std::string conffile = std::string(getenv("DORIS_HOME")) + "/conf/be.conf";
// if (!doris::config::init(conffile.c_str(), false)) {
// fprintf(stderr, "error read config file. \n");
// return -1;
// }
doris::config::query_scratch_dirs = "/tmp";
// doris::config::max_free_io_buffers = 128;
doris::config::read_size = 8388608;
doris::config::min_buffer_size = 1024;
doris::config::disable_mem_pools = false;
doris::init_glog("be-test");
::testing::InitGoogleTest(&argc, argv);
doris::CpuInfo::init();
doris::DiskInfo::init();
return RUN_ALL_TESTS();
}
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