118 lines
3.5 KiB
C++
118 lines
3.5 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/MpmcWaiter.h"
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#include "td/utils/port/sleep.h"
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#include "td/utils/port/thread.h"
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#include "td/utils/Random.h"
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#include "td/utils/tests.h"
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#include <atomic>
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#if !TD_THREAD_UNSUPPORTED
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TEST(MpmcWaiter, stress_one_one) {
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td::Stage run;
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td::Stage check;
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std::vector<td::thread> threads;
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std::atomic<size_t> value{0};
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size_t write_cnt = 10;
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td::unique_ptr<td::MpmcWaiter> waiter;
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size_t threads_n = 2;
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for (size_t i = 0; i < threads_n; i++) {
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threads.push_back(td::thread([&, id = static_cast<td::uint32>(i)] {
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for (td::uint64 round = 1; round < 100000; round++) {
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if (id == 0) {
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value = 0;
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waiter = td::make_unique<td::MpmcWaiter>();
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write_cnt = td::Random::fast(1, 10);
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}
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run.wait(round * threads_n);
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if (id == 1) {
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for (size_t i = 0; i < write_cnt; i++) {
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value.store(i + 1, std::memory_order_relaxed);
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waiter->notify();
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}
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} else {
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int yields = 0;
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for (size_t i = 1; i <= write_cnt; i++) {
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while (true) {
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auto x = value.load(std::memory_order_relaxed);
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if (x >= i) {
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break;
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}
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yields = waiter->wait(yields, id);
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}
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yields = waiter->stop_wait(yields, id);
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}
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}
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check.wait(round * threads_n);
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}
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}));
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}
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for (auto &thread : threads) {
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thread.join();
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}
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}
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TEST(MpmcWaiter, stress) {
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td::Stage run;
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td::Stage check;
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std::vector<td::thread> threads;
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size_t write_n;
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size_t read_n;
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std::atomic<size_t> write_pos{0};
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std::atomic<size_t> read_pos{0};
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size_t end_pos;
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size_t write_cnt;
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size_t threads_n = 20;
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td::unique_ptr<td::MpmcWaiter> waiter;
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for (size_t i = 0; i < threads_n; i++) {
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threads.push_back(td::thread([&, id = static_cast<td::uint32>(i)] {
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for (td::uint64 round = 1; round < 1000; round++) {
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if (id == 0) {
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write_n = td::Random::fast(1, 10);
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read_n = td::Random::fast(1, 10);
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write_cnt = td::Random::fast(1, 50);
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end_pos = write_n * write_cnt;
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write_pos = 0;
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read_pos = 0;
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waiter = td::make_unique<td::MpmcWaiter>();
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}
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run.wait(round * threads_n);
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if (id <= write_n) {
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for (size_t i = 0; i < write_cnt; i++) {
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if (td::Random::fast(0, 20) == 0) {
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td::usleep_for(td::Random::fast(1, 300));
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}
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write_pos.fetch_add(1, std::memory_order_relaxed);
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waiter->notify();
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}
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} else if (id > 10 && id - 10 <= read_n) {
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int yields = 0;
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while (true) {
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auto x = read_pos.load(std::memory_order_relaxed);
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if (x == end_pos) {
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break;
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}
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if (x == write_pos.load(std::memory_order_relaxed)) {
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yields = waiter->wait(yields, id);
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continue;
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}
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yields = waiter->stop_wait(yields, id);
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read_pos.compare_exchange_strong(x, x + 1, std::memory_order_relaxed);
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}
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}
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check.wait(round * threads_n);
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}
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}));
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}
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for (auto &thread : threads) {
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thread.join();
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}
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}
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#endif // !TD_THREAD_UNSUPPORTED
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