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tdlib-fork/tdutils/test/ConcurrentHashMap.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <cstdio>
#include "td/utils/tests.h"
#include "td/utils/benchmark.h"
#include "td/utils/SpinLock.h"
#include "td/utils/HazardPointers.h"
#include "td/utils/ConcurrentHashTable.h"
#include <algorithm>
#if TD_HAVE_ABSL
#include <absl/container/flat_hash_map.h>
#else
#include <unordered_map>
#endif
#if TD_WITH_JUNCTION
#include <third-party/libcuckoo/libcuckoo/cuckoohash_map.hh>
#endif
#if TD_WITH_JUNCTION
#include <junction/ConcurrentMap_Grampa.h>
#include <junction/ConcurrentMap_Linear.h>
#include <junction/ConcurrentMap_Leapfrog.h>
#endif
namespace td {
// Non resizable HashMap. Just an example
template <class KeyT, class ValueT>
class ArrayHashMap {
public:
ArrayHashMap(size_t n) : array_(n) {
}
struct Node {
std::atomic<KeyT> key{KeyT{}};
std::atomic<ValueT> value{};
};
static std::string get_name() {
return "ArrayHashMap";
}
KeyT empty_key() const {
return KeyT{};
}
void insert(KeyT key, ValueT value) {
array_.with_value(key, true, [&](auto &node_value) { node_value.store(value, std::memory_order_release); });
}
ValueT find(KeyT key, ValueT value) {
array_.with_value(key, false, [&](auto &node_value) { value = node_value.load(std::memory_order_acquire); });
return value;
}
private:
AtomicHashArray<KeyT, std::atomic<ValueT>> array_;
};
template <class KeyT, class ValueT>
class ConcurrentHashMapMutex {
public:
ConcurrentHashMapMutex(size_t) {
}
static std::string get_name() {
return "ConcurrentHashMapMutex";
}
void insert(KeyT key, ValueT value) {
std::unique_lock<std::mutex> lock(mutex_);
hash_map_.emplace(key, value);
}
ValueT find(KeyT key, ValueT default_value) {
std::unique_lock<std::mutex> lock(mutex_);
auto it = hash_map_.find(key);
if (it == hash_map_.end()) {
return default_value;
}
return it->second;
}
private:
std::mutex mutex_;
#if TD_HAVE_ABSL
absl::flat_hash_map<KeyT, ValueT> hash_map_;
#else
std::unordered_map<KeyT, ValueT> hash_map_;
#endif
};
template <class KeyT, class ValueT>
class ConcurrentHashMapSpinlock {
public:
ConcurrentHashMapSpinlock(size_t) {
}
static std::string get_name() {
return "ConcurrentHashMapSpinlock";
}
void insert(KeyT key, ValueT value) {
auto guard = spinlock_.lock();
hash_map_.emplace(key, value);
}
ValueT find(KeyT key, ValueT default_value) {
auto guard = spinlock_.lock();
auto it = hash_map_.find(key);
if (it == hash_map_.end()) {
return default_value;
}
return it->second;
}
private:
td::SpinLock spinlock_;
#if TD_HAVE_ABSL
absl::flat_hash_map<KeyT, ValueT> hash_map_;
#else
std::unordered_map<KeyT, ValueT> hash_map_;
#endif
};
#if TD_WITH_LIBCUCKOO
template <class KeyT, class ValueT>
class ConcurrentHashMapLibcuckoo {
public:
ConcurrentHashMapLibcuckoo(size_t) {
}
static std::string get_name() {
return "ConcurrentHashMapLibcuckoo";
}
void insert(KeyT key, ValueT value) {
hash_map_.insert(key, value);
}
ValueT find(KeyT key, ValueT default_value) {
hash_map_.find(key, default_value);
return default_value;
}
private:
cuckoohash_map<KeyT, ValueT> hash_map_;
};
#endif
#if TD_WITH_JUNCTION
template <class KeyT, class ValueT>
class ConcurrentHashMapJunction {
public:
ConcurrentHashMapJunction(size_t size) : hash_map_() {
}
static std::string get_name() {
return "ConcurrentHashMapJunction";
}
void insert(KeyT key, ValueT value) {
hash_map_.assign(key, value);
}
ValueT find(KeyT key, ValueT default_value) {
return hash_map_.get(key);
}
~ConcurrentHashMapJunction() {
junction::DefaultQSBR.flush();
}
private:
junction::ConcurrentMap_Leapfrog<KeyT, ValueT> hash_map_;
};
#endif
} // namespace td
template <class HashMap>
class HashMapBenchmark : public td::Benchmark {
struct Query {
int key;
int value;
};
std::vector<Query> queries;
std::unique_ptr<HashMap> hash_map;
size_t threads_n = 16;
int mod_;
constexpr static size_t mul_ = 7273; //1000000000 + 7;
int n_;
public:
HashMapBenchmark(size_t threads_n) : threads_n(threads_n) {
}
std::string get_description() const override {
return hash_map->get_name();
}
void start_up_n(int n) override {
n *= (int)threads_n;
n_ = n;
hash_map = std::make_unique<HashMap>(n * 2);
}
void run(int n) override {
n = n_;
std::vector<td::thread> threads;
for (size_t i = 0; i < threads_n; i++) {
size_t l = n * i / threads_n;
size_t r = n * (i + 1) / threads_n;
threads.emplace_back([l, r, this] {
for (size_t i = l; i < r; i++) {
auto x = int((i + 1) * mul_ % n_) + 3;
auto y = int(i + 2);
hash_map->insert(x, y);
}
});
}
for (auto &thread : threads) {
thread.join();
}
}
void tear_down() override {
for (int i = 0; i < n_; i++) {
auto x = int((i + 1) * mul_ % n_) + 3;
auto y = int(i + 2);
ASSERT_EQ(y, hash_map->find(x, -1));
}
queries.clear();
hash_map.reset();
}
private:
};
template <class HashMap>
void bench_hash_map() {
td::bench(HashMapBenchmark<HashMap>(16));
td::bench(HashMapBenchmark<HashMap>(1));
}
TEST(ConcurrentHashMap, Benchmark) {
bench_hash_map<td::ConcurrentHashMap<int, int>>();
bench_hash_map<td::ArrayHashMap<int, int>>();
bench_hash_map<td::ConcurrentHashMapSpinlock<int, int>>();
bench_hash_map<td::ConcurrentHashMapMutex<int, int>>();
#if TD_WITH_LIBCUCKOO
bench_hash_map<td::ConcurrentHashMapLibcuckoo<int, int>>();
#endif
#if TD_WITH_JUNCTION
bench_hash_map<td::ConcurrentHashMapJunction<int, int>>();
#endif
}