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tdlib-fork/benchmark/bench_queue.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
//
// 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 "td/utils/benchmark.h"
#include "td/utils/common.h"
#include "td/utils/logging.h"
#include "td/utils/MpscPollableQueue.h"
#include "td/utils/port/sleep.h"
#include "td/utils/port/thread.h"
#include "td/utils/queue.h"
#include "td/utils/Random.h"
// TODO: check system calls
// TODO: all return values must be checked
#include <atomic>
#include <cstdio>
#include <cstdlib>
#include <vector>
#include <pthread.h>
#include <sched.h>
#include <semaphore.h>
#include <sys/syscall.h>
#include <unistd.h>
#if TD_LINUX
#include <sys/eventfd.h>
#endif
#define MODE std::memory_order_relaxed
// void set_affinity(int mask) {
// int err, syscallres;
// pid_t pid = gettid();
// syscallres = syscall(__NR_sched_setaffinity, pid, sizeof(mask), &mask);
// if (syscallres) {
// err = errno;
// perror("oppa");
//}
//}
// TODO: warnings and asserts. There should be no warnings or debug output in production.
using qvalue_t = int;
// Just for testing, not production
class PipeQueue {
int input;
int output;
public:
void init() {
int new_pipe[2];
int res = pipe(new_pipe);
CHECK(res == 0);
output = new_pipe[0];
input = new_pipe[1];
}
void put(qvalue_t value) {
auto len = write(input, &value, sizeof(value));
CHECK(len == sizeof(value));
}
qvalue_t get() {
qvalue_t res;
auto len = read(output, &res, sizeof(res));
CHECK(len == sizeof(res));
return res;
}
void destroy() {
close(input);
close(output);
}
};
class Backoff {
int cnt;
public:
Backoff() : cnt(0) {
}
bool next() {
cnt++;
if (cnt < 50) {
return true;
} else {
sched_yield();
return cnt < 500;
}
}
};
class VarQueue {
std::atomic<qvalue_t> data{0};
public:
void init() {
data.store(-1, MODE);
}
void put(qvalue_t value) {
data.store(value, MODE);
}
qvalue_t try_get() {
__sync_synchronize(); // TODO: it is wrong place for barrier, but it results in fastest queue
qvalue_t res = data.load(MODE);
return res;
}
void acquire() {
data.store(-1, MODE);
}
qvalue_t get() {
qvalue_t res;
Backoff backoff;
do {
res = try_get();
} while (res == -1 && (backoff.next(), true));
acquire();
return res;
}
void destroy() {
}
};
class SemQueue {
sem_t sem;
VarQueue q;
public:
void init() {
q.init();
sem_init(&sem, 0, 0);
}
void put(qvalue_t value) {
q.put(value);
sem_post(&sem);
}
qvalue_t get() {
sem_wait(&sem);
qvalue_t res = q.get();
return res;
}
void destroy() {
q.destroy();
sem_destroy(&sem);
}
// HACK for benchmark
void reader_flush() {
}
void writer_flush() {
}
void writer_put(qvalue_t value) {
put(value);
}
int reader_wait() {
return 1;
}
qvalue_t reader_get_unsafe() {
return get();
}
};
#if TD_LINUX
class EventfdQueue {
int fd;
VarQueue q;
public:
void init() {
q.init();
fd = eventfd(0, 0);
}
void put(qvalue_t value) {
q.put(value);
td::int64 x = 1;
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
qvalue_t get() {
td::int64 x;
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
CHECK(x == 1);
return q.get();
}
void destroy() {
q.destroy();
close(fd);
}
};
#endif
const int queue_buf_size = 1 << 10;
class BufferQueue {
struct node {
qvalue_t val;
char pad[64 - sizeof(std::atomic<qvalue_t>)];
};
node q[queue_buf_size];
struct Position {
std::atomic<td::uint32> i{0};
char pad[64 - sizeof(std::atomic<td::uint32>)];
td::uint32 local_read_i;
td::uint32 local_write_i;
char pad2[64 - sizeof(td::uint32) * 2];
void init() {
i = 0;
local_read_i = 0;
local_write_i = 0;
}
};
Position writer;
Position reader;
public:
void init() {
writer.init();
reader.init();
}
bool reader_empty() {
return reader.local_write_i == reader.local_read_i;
}
bool writer_empty() {
return writer.local_write_i == writer.local_read_i + queue_buf_size;
}
int reader_ready() {
return static_cast<int>(reader.local_write_i - reader.local_read_i);
}
int writer_ready() {
return static_cast<int>(writer.local_read_i + queue_buf_size - writer.local_write_i);
}
qvalue_t get_unsafe() {
return q[reader.local_read_i++ & (queue_buf_size - 1)].val;
}
void flush_reader() {
reader.i.store(reader.local_read_i, std::memory_order_release);
}
int update_reader() {
reader.local_write_i = writer.i.load(std::memory_order_acquire);
return reader_ready();
}
void put_unsafe(qvalue_t val) {
q[writer.local_write_i++ & (queue_buf_size - 1)].val = val;
}
void flush_writer() {
writer.i.store(writer.local_write_i, std::memory_order_release);
}
int update_writer() {
writer.local_read_i = reader.i.load(std::memory_order_acquire);
return writer_ready();
}
int wait_reader() {
Backoff backoff;
int res = 0;
while (res == 0) {
backoff.next();
res = update_reader();
}
return res;
}
qvalue_t get_noflush() {
if (!reader_empty()) {
return get_unsafe();
}
Backoff backoff;
while (true) {
backoff.next();
if (update_reader()) {
return get_unsafe();
}
}
}
qvalue_t get() {
qvalue_t res = get_noflush();
flush_reader();
return res;
}
void put_noflush(qvalue_t val) {
if (!writer_empty()) {
put_unsafe(val);
return;
}
if (!update_writer()) {
std::fprintf(stderr, "put strong failed\n");
std::exit(0);
}
put_unsafe(val);
}
void put(qvalue_t val) {
put_noflush(val);
flush_writer();
}
void destroy() {
}
};
#if TD_LINUX
class BufferedFdQueue {
int fd;
std::atomic<int> wait_flag{0};
BufferQueue q;
char pad[64];
public:
void init() {
q.init();
fd = eventfd(0, 0);
(void)pad[0];
}
void put(qvalue_t value) {
q.put(value);
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
void put_noflush(qvalue_t value) {
q.put_noflush(value);
}
void flush_writer() {
q.flush_writer();
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
void flush_reader() {
q.flush_reader();
}
qvalue_t get_unsafe_flush() {
qvalue_t res = q.get_unsafe();
q.flush_reader();
return res;
}
qvalue_t get_unsafe() {
return q.get_unsafe();
}
int wait_reader() {
int res = 0;
Backoff backoff;
while (res == 0 && backoff.next()) {
res = q.update_reader();
}
if (res != 0) {
return res;
}
td::int64 x;
wait_flag.store(1, MODE);
__sync_synchronize();
while (!(res = q.update_reader())) {
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
__sync_synchronize();
}
wait_flag.store(0, MODE);
return res;
}
qvalue_t get() {
if (!q.reader_empty()) {
return get_unsafe_flush();
}
Backoff backoff;
while (backoff.next()) {
if (q.update_reader()) {
return get_unsafe_flush();
}
}
td::int64 x;
wait_flag.store(1, MODE);
__sync_synchronize();
while (!q.update_reader()) {
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
__sync_synchronize();
}
wait_flag.store(0, MODE);
return get_unsafe_flush();
}
void destroy() {
q.destroy();
close(fd);
}
};
class FdQueue {
int fd;
std::atomic<int> wait_flag{0};
VarQueue q;
char pad[64];
public:
void init() {
q.init();
fd = eventfd(0, 0);
(void)pad[0];
}
void put(qvalue_t value) {
q.put(value);
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
qvalue_t get() {
// td::int64 x;
// auto len = read(fd, &x, sizeof(x));
// CHECK(len == sizeof(x));
// return q.get();
Backoff backoff;
qvalue_t res = -1;
do {
res = q.try_get();
} while (res == -1 && backoff.next());
if (res != -1) {
q.acquire();
return res;
}
td::int64 x;
wait_flag.store(1, MODE);
__sync_synchronize();
// std::fprintf(stderr, "!\n");
// while (res == -1 && read(fd, &x, sizeof(x)) == sizeof(x)) {
// res = q.try_get();
//}
do {
__sync_synchronize();
res = q.try_get();
} while (res == -1 && read(fd, &x, sizeof(x)) == sizeof(x));
q.acquire();
wait_flag.store(0, MODE);
return res;
}
void destroy() {
q.destroy();
close(fd);
}
};
#endif
class SemBackoffQueue {
sem_t sem;
VarQueue q;
public:
void init() {
q.init();
sem_init(&sem, 0, 0);
}
void put(qvalue_t value) {
q.put(value);
sem_post(&sem);
}
qvalue_t get() {
Backoff backoff;
int sem_flag = -1;
do {
sem_flag = sem_trywait(&sem);
} while (sem_flag != 0 && backoff.next());
if (sem_flag != 0) {
sem_wait(&sem);
}
return q.get();
}
void destroy() {
q.destroy();
sem_destroy(&sem);
}
};
class SemCheatQueue {
sem_t sem;
VarQueue q;
public:
void init() {
q.init();
sem_init(&sem, 0, 0);
}
void put(qvalue_t value) {
q.put(value);
sem_post(&sem);
}
qvalue_t get() {
Backoff backoff;
qvalue_t res = -1;
do {
res = q.try_get();
} while (res == -1 && backoff.next());
sem_wait(&sem);
if (res != -1) {
q.acquire();
return res;
}
return q.get();
}
void destroy() {
q.destroy();
sem_destroy(&sem);
}
};
template <class QueueT>
class QueueBenchmark2 : public td::Benchmark {
QueueT client, server;
int connections_n, queries_n;
int server_active_connections;
int client_active_connections;
std::vector<td::int64> server_conn;
std::vector<td::int64> client_conn;
public:
explicit QueueBenchmark2(int connections_n = 1) : connections_n(connections_n) {
}
std::string get_description() const override {
return "QueueBenchmark2";
}
void start_up() override {
client.init();
server.init();
}
void tear_down() override {
client.destroy();
server.destroy();
}
void server_process(qvalue_t value) {
int no = value & 0x00FFFFFF;
int co = static_cast<int>(static_cast<unsigned int>(value) >> 24);
// std::fprintf(stderr, "-->%d %d\n", co, no);
if (co < 0 || co >= connections_n || no != server_conn[co]++) {
std::fprintf(stderr, "%d %d\n", co, no);
std::fprintf(stderr, "expected %d %lld\n", co, static_cast<long long>(server_conn[co] - 1));
std::fprintf(stderr, "Server BUG\n");
while (true) {
}
}
// std::fprintf(stderr, "no = %d/%d\n", no, queries_n);
// std::fprintf(stderr, "answer: %d %d\n", no, co);
client.writer_put(value);
client.writer_flush();
if (no + 1 >= queries_n) {
server_active_connections--;
}
}
void *server_run(void *) {
server_conn = std::vector<td::int64>(connections_n);
server_active_connections = connections_n;
while (server_active_connections > 0) {
int cnt = server.reader_wait();
if (cnt == 0) {
std::fprintf(stderr, "ERROR!\n");
std::exit(0);
}
while (cnt-- > 0) {
server_process(server.reader_get_unsafe());
server.reader_flush();
}
// client.writer_flush();
server.reader_flush();
}
return nullptr;
}
void client_process(qvalue_t value) {
int no = value & 0x00FFFFFF;
int co = static_cast<int>(static_cast<unsigned int>(value) >> 24);
// std::fprintf(stderr, "<--%d %d\n", co, no);
if (co < 0 || co >= connections_n || no != client_conn[co]++) {
std::fprintf(stderr, "%d %d\n", co, no);
std::fprintf(stderr, "expected %d %lld\n", co, static_cast<long long>(client_conn[co] - 1));
std::fprintf(stderr, "BUG\n");
while (true) {
}
std::exit(0);
}
if (no + 1 < queries_n) {
// std::fprintf(stderr, "query: %d %d\n", no + 1, co);
server.writer_put(value + 1);
server.writer_flush();
} else {
client_active_connections--;
}
}
void *client_run(void *) {
client_conn = std::vector<td::int64>(connections_n);
client_active_connections = connections_n;
if (queries_n >= (1 << 24)) {
std::fprintf(stderr, "Too big queries_n\n");
std::exit(0);
}
for (int i = 0; i < connections_n; i++) {
server.writer_put(static_cast<qvalue_t>(i) << 24);
}
server.writer_flush();
while (client_active_connections > 0) {
int cnt = client.reader_wait();
if (cnt == 0) {
std::fprintf(stderr, "ERROR!\n");
std::exit(0);
}
while (cnt-- > 0) {
client_process(client.reader_get_unsafe());
client.reader_flush();
}
// server.writer_flush();
client.reader_flush();
}
// system("cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
return nullptr;
}
static void *client_run_gateway(void *arg) {
return static_cast<QueueBenchmark2 *>(arg)->client_run(nullptr);
}
static void *server_run_gateway(void *arg) {
return static_cast<QueueBenchmark2 *>(arg)->server_run(nullptr);
}
void run(int n) override {
pthread_t client_thread_id;
pthread_t server_thread_id;
queries_n = (n + connections_n - 1) / connections_n;
pthread_create(&client_thread_id, nullptr, client_run_gateway, this);
pthread_create(&server_thread_id, nullptr, server_run_gateway, this);
pthread_join(client_thread_id, nullptr);
pthread_join(server_thread_id, nullptr);
}
};
template <class QueueT>
class QueueBenchmark : public td::Benchmark {
QueueT client, server;
const int connections_n;
int queries_n;
public:
explicit QueueBenchmark(int connections_n = 1) : connections_n(connections_n) {
}
std::string get_description() const override {
return "QueueBenchmark";
}
void start_up() override {
client.init();
server.init();
}
void tear_down() override {
client.destroy();
server.destroy();
}
void *server_run(void *) {
std::vector<td::int64> conn(connections_n);
int active_connections = connections_n;
while (active_connections > 0) {
qvalue_t value = server.get();
int no = value & 0x00FFFFFF;
int co = static_cast<int>(value >> 24);
// std::fprintf(stderr, "-->%d %d\n", co, no);
if (co < 0 || co >= connections_n || no != conn[co]++) {
std::fprintf(stderr, "%d %d\n", co, no);
std::fprintf(stderr, "expected %d %lld\n", co, static_cast<long long>(conn[co] - 1));
std::fprintf(stderr, "Server BUG\n");
while (true) {
}
}
// std::fprintf(stderr, "no = %d/%d\n", no, queries_n);
client.put(value);
if (no + 1 >= queries_n) {
active_connections--;
}
}
return nullptr;
}
void *client_run(void *) {
std::vector<td::int64> conn(connections_n);
if (queries_n >= (1 << 24)) {
std::fprintf(stderr, "Too big queries_n\n");
std::exit(0);
}
for (int i = 0; i < connections_n; i++) {
server.put(static_cast<qvalue_t>(i) << 24);
}
int active_connections = connections_n;
while (active_connections > 0) {
qvalue_t value = client.get();
int no = value & 0x00FFFFFF;
int co = static_cast<int>(value >> 24);
// std::fprintf(stderr, "<--%d %d\n", co, no);
if (co < 0 || co >= connections_n || no != conn[co]++) {
std::fprintf(stderr, "%d %d\n", co, no);
std::fprintf(stderr, "expected %d %lld\n", co, static_cast<long long>(conn[co] - 1));
std::fprintf(stderr, "BUG\n");
while (true) {
}
std::exit(0);
}
if (no + 1 < queries_n) {
server.put(value + 1);
} else {
active_connections--;
}
}
// system("cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
return nullptr;
}
void *client_run2(void *) {
std::vector<td::int64> conn(connections_n);
if (queries_n >= (1 << 24)) {
std::fprintf(stderr, "Too big queries_n\n");
std::exit(0);
}
for (int query = 0; query < queries_n; query++) {
for (int i = 0; i < connections_n; i++) {
server.put((static_cast<td::int64>(i) << 24) + query);
}
for (int i = 0; i < connections_n; i++) {
qvalue_t value = client.get();
int no = value & 0x00FFFFFF;
int co = static_cast<int>(value >> 24);
// std::fprintf(stderr, "<--%d %d\n", co, no);
if (co < 0 || co >= connections_n || no != conn[co]++) {
std::fprintf(stderr, "%d %d\n", co, no);
std::fprintf(stderr, "expected %d %lld\n", co, static_cast<long long>(conn[co] - 1));
std::fprintf(stderr, "BUG\n");
while (true) {
}
std::exit(0);
}
}
}
// system("cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
return nullptr;
}
static void *client_run_gateway(void *arg) {
return static_cast<QueueBenchmark *>(arg)->client_run(nullptr);
}
static void *server_run_gateway(void *arg) {
return static_cast<QueueBenchmark *>(arg)->server_run(nullptr);
}
void run(int n) override {
pthread_t client_thread_id;
pthread_t server_thread_id;
queries_n = (n + connections_n - 1) / connections_n;
pthread_create(&client_thread_id, nullptr, client_run_gateway, this);
pthread_create(&server_thread_id, nullptr, server_run_gateway, this);
pthread_join(client_thread_id, nullptr);
pthread_join(server_thread_id, nullptr);
}
};
template <class QueueT>
class RingBenchmark : public td::Benchmark {
enum { QN = 504 };
struct Thread {
int int_id;
pthread_t id;
QueueT queue;
Thread *next;
char pad[64];
void *run() {
qvalue_t value;
// std::fprintf(stderr, "start %d\n", int_id);
do {
int cnt = queue.reader_wait();
CHECK(cnt == 1);
value = queue.reader_get_unsafe();
queue.reader_flush();
next->queue.writer_put(value - 1);
next->queue.writer_flush();
} while (value >= QN);
return nullptr;
}
};
Thread q[QN];
public:
static void *run_gateway(void *arg) {
return static_cast<Thread *>(arg)->run();
}
void start_up() override {
for (int i = 0; i < QN; i++) {
q[i].int_id = i;
q[i].queue.init();
q[i].next = &q[(i + 1) % QN];
}
}
void tear_down() override {
for (int i = 0; i < QN; i++) {
q[i].queue.destroy();
}
}
void run(int n) override {
for (int i = 0; i < QN; i++) {
pthread_create(&q[i].id, nullptr, run_gateway, &q[i]);
}
std::fprintf(stderr, "run %d\n", n);
if (n < 1000) {
n = 1000;
}
q[0].queue.writer_put(n);
q[0].queue.writer_flush();
for (int i = 0; i < QN; i++) {
pthread_join(q[i].id, nullptr);
}
}
};
void test_queue() {
std::vector<td::thread> threads;
constexpr size_t threads_n = 100;
std::vector<td::MpscPollableQueue<int>> queues(threads_n);
for (auto &q : queues) {
q.init();
}
for (size_t i = 0; i < threads_n; i++) {
threads.emplace_back([&q = queues[i]] {
while (true) {
auto got = q.reader_wait_nonblock();
while (got-- > 0) {
q.reader_get_unsafe();
}
q.reader_get_event_fd().wait(1000);
}
});
}
while (true) {
td::usleep_for(100);
for (int i = 0; i < 5; i++) {
queues[td::Random::fast(0, threads_n - 1)].writer_put(1);
}
}
}
int main() {
SET_VERBOSITY_LEVEL(VERBOSITY_NAME(DEBUG));
//test_queue();
#define BENCH_Q2(Q, N) \
std::fprintf(stderr, "!%s %d:\t", #Q, N); \
td::bench(QueueBenchmark2<Q>(N));
#define BENCH_Q(Q, N) \
std::fprintf(stderr, "%s %d:\t", #Q, N); \
td::bench(QueueBenchmark<Q>(N));
#define BENCH_R(Q) \
std::fprintf(stderr, "%s:\t", #Q); \
td::bench(RingBenchmark<Q>());
// TODO: yield makes it extremely slow. Yet some backoff may be necessary.
// BENCH_R(SemQueue);
// BENCH_R(td::PollQueue<qvalue_t>);
BENCH_Q2(td::PollQueue<qvalue_t>, 1);
BENCH_Q2(td::MpscPollableQueue<qvalue_t>, 1);
BENCH_Q2(td::PollQueue<qvalue_t>, 100);
BENCH_Q2(td::MpscPollableQueue<qvalue_t>, 100);
BENCH_Q2(td::PollQueue<qvalue_t>, 10);
BENCH_Q2(td::MpscPollableQueue<qvalue_t>, 10);
BENCH_Q(VarQueue, 1);
// BENCH_Q(FdQueue, 1);
// BENCH_Q(BufferedFdQueue, 1);
BENCH_Q(PipeQueue, 1);
BENCH_Q(SemCheatQueue, 1);
BENCH_Q(SemQueue, 1);
// BENCH_Q2(td::PollQueue<qvalue_t>, 100);
// BENCH_Q2(td::PollQueue<qvalue_t>, 10);
// BENCH_Q2(td::PollQueue<qvalue_t>, 4);
// BENCH_Q2(td::InfBackoffQueue<qvalue_t>, 100);
// BENCH_Q2(td::InfBackoffQueue<qvalue_t>, 1);
// BENCH_Q(SemCheatQueue, 1);
// BENCH_Q(BufferedFdQueue, 100);
// BENCH_Q(BufferedFdQueue, 10);
// BENCH_Q(BufferQueue, 4);
// BENCH_Q(BufferQueue, 100);
// BENCH_Q(BufferQueue, 10);
// BENCH_Q(BufferQueue, 1);
return 0;
}