cpp-taskflow/unittest/executor.cpp at master · curiousTauseef/cpp-taskflow · GitHub

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// 2019/04/11 - modified by Tsung-Wei Huang

// - renamed threadpool to executor

// 2019/02/15 - modified by Tsung-Wei Huang

// - modified batch tests (reference instead of move)

// 2018/12/04 - modified by Tsung-Wei Huang

// - replaced privatized executor with work stealing executor

// 2018/12/03 - modified by Tsung-Wei Huang

// - added work stealing queue tests

// 2018/11/29 - modified by Chun-Xun Lin

// - added batch tests

// 2018/10/04 - modified by Tsung-Wei Huang

// - removed binary tree tests

// - removed spawn/shutdown tests

// - removed siltne_async and async tests

// - added emplace test

// - adopted the new thread pool implementation

// 2018/09/29 - modified by Tsung-Wei Huang

// - added binary tree tests

// - added worker queue tests

// - added external thread tests

// - refactored executor tests

// 2018/09/13 - modified by Tsung-Wei Huang & Chun-Xun

// - added tests for ownership

// - modified spawn-shutdown tests

// 2018/09/10 - modified by Tsung-Wei Huang

// - added tests for SpeculativeExecutor

// - added dynamic tasking tests

// - added spawn and shutdown tests

// 2018/09/02 - created by Guannan

// - test_silent_async

// - test_async

// - test_wait_for_all

#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN

#include <doctest.h>

#include <taskflow/executor/executor.hpp>

#include <chrono>

#include <taskflow/executor/semaphore.hpp>

// ============================================================================

// WorkStealingQueue tests

// ============================================================================

// Procedure: wsq_test_owner

void wsq_test_owner() {

int64_t cap = 2;

tf::WorkStealingQueue<int> queue(cap);

std::deque<int> gold;

REQUIRE(queue.capacity() == 2);

REQUIRE(queue.empty());

for(int i=2; i<=(1<<20); i <<= 1) {

REQUIRE(queue.empty());

for(int j=0; j<i; ++j) {

queue.push(j);

}

for(int j=0; j<i; ++j) {

auto item = queue.pop();

REQUIRE((item && *item == i-j-1));

}

REQUIRE(!queue.pop());

REQUIRE(queue.empty());

for(int j=0; j<i; ++j) {

queue.push(j);

}

for(int j=0; j<i; ++j) {

auto item = queue.steal();

REQUIRE((item && *item == j));

}

REQUIRE(!queue.pop());

REQUIRE(queue.empty());

for(int j=0; j<i; ++j) {

// enqueue

if(auto dice = ::rand()%3; dice == 0) {

queue.push(j);

gold.push_back(j);

}

// pop back

else if(dice == 1) {

auto item = queue.pop();

if(gold.empty()) {

REQUIRE(!item);

}

else {

REQUIRE(*item == gold.back());

gold.pop_back();

}

// pop front

else {

auto item = queue.steal();

if(gold.empty()) {

REQUIRE(!item);

}

else {

REQUIRE(*item == gold.front());

gold.pop_front();

}

REQUIRE(queue.size() == (int)gold.size());

}

while(!queue.empty()) {

auto item = queue.pop();

REQUIRE((item && *item == gold.back()));

gold.pop_back();

}

REQUIRE(gold.empty());

REQUIRE(queue.capacity() == i);

}

// Procedure: wsq_test_n_thieves

void wsq_test_n_thieves(int N) {

int64_t cap = 2;

tf::WorkStealingQueue<int> queue(cap);

REQUIRE(queue.capacity() == 2);

REQUIRE(queue.empty());

for(int i=2; i<=(1<<20); i <<= 1) {

REQUIRE(queue.empty());

int p = 0;

std::vector<std::deque<int>> cdeqs(N);

std::vector<std::thread> consumers;

std::deque<int> pdeq;

auto num_stolen = [&] () {

int total = 0;

for(const auto& cdeq : cdeqs) {

total += cdeq.size();

}

return total;

};

for(int n=0; n<N; n++) {

consumers.emplace_back([&, n] () {

while(num_stolen() + (int)pdeq.size() != i) {

if(auto dice = ::rand() % 4; dice == 0) {

if(auto item = queue.steal(); item) {

cdeqs[n].push_back(*item);

}

});

}

std::thread producer([&] () {

while(p < i) {

if(auto dice = ::rand() % 4; dice == 0) {

queue.push(p++);

}

else if(dice == 1) {

if(auto item = queue.pop(); item) {

pdeq.push_back(*item);

}

});

producer.join();

for(auto& c : consumers) {

c.join();

}

REQUIRE(queue.empty());

REQUIRE(queue.capacity() <= i);

std::set<int> set;

for(const auto& cdeq : cdeqs) {

for(auto k : cdeq) {

set.insert(k);

}

for(auto k : pdeq) {

set.insert(k);

}

for(int j=0; j<i; ++j) {

REQUIRE(set.find(j) != set.end());

}

REQUIRE((int)set.size() == i);

}

// ----------------------------------------------------------------------------

// Testcase: WSQTest.Owner

// ----------------------------------------------------------------------------

TEST_CASE("WSQ.Owner" * doctest::timeout(300)) {

wsq_test_owner();

}

// ----------------------------------------------------------------------------

// Testcase: WSQTest.1Thief

// ----------------------------------------------------------------------------

TEST_CASE("WSQ.1Thief" * doctest::timeout(300)) {

wsq_test_n_thieves(1);

}

// ----------------------------------------------------------------------------

// Testcase: WSQTest.2Thieves

// ----------------------------------------------------------------------------

TEST_CASE("WSQ.2Thieves" * doctest::timeout(300)) {

wsq_test_n_thieves(2);

}

// ----------------------------------------------------------------------------

// Testcase: WSQTest.3Thieves

// ----------------------------------------------------------------------------

TEST_CASE("WSQ.3Thieves" * doctest::timeout(300)) {

wsq_test_n_thieves(3);

}

// ----------------------------------------------------------------------------

// Testcase: WSQTest.4Thieves

// ----------------------------------------------------------------------------

TEST_CASE("WSQ.4Thieves" * doctest::timeout(300)) {

wsq_test_n_thieves(4);

}

// ============================================================================

// Executor tests

// ============================================================================

// Procedure: test_ownership

template <typename ExecutorType>

void test_ownership(ExecutorType& tp) {

REQUIRE(tp.is_owner());

tp.emplace([&](){

if(tp.num_workers() == 0) {

REQUIRE(tp.is_owner());

}

else {

REQUIRE(!tp.is_owner());

}

});

std::vector<std::thread> threads;

for(int i=0; i<10; ++i) {

threads.emplace_back([&] () {

REQUIRE(!tp.is_owner());

});

}

for(auto& t : threads) {

t.join();

}

// Procedure: test_emplace

template <typename ExecutorType>

void test_emplace(ExecutorType& tp) {

constexpr size_t num_tasks = 1024;

std::atomic<size_t> counter{0};

for(size_t i=0; i<num_tasks; i++){

tp.emplace([&counter](){

counter.fetch_add(1, std::memory_order_relaxed); }

);

}

while(counter != num_tasks);

}

// Procedure: test_dynamic_tasking

template <typename T>

void test_dynamic_tasking(T& executor) {

std::atomic<size_t> sum {0};

std::atomic<size_t> cnt {0};

std::function<void(int)> insert;

std::promise<int> promise;

auto future = promise.get_future();

insert = [&executor, &insert, &sum, &promise, &cnt] (int i) {

if(i > 0) {

++cnt;

executor.emplace([i=i-1, &insert] () {

insert(i);

});

}

else {

if(auto s = ++sum; s == executor.num_workers()) {

promise.set_value(1);

}

};

if(auto W = executor.num_workers(); W > 0) {

for(size_t i=0; i<executor.num_workers(); i++){

insert(100);

}

else {

promise.set_value(1);

}

// synchronize until all tasks finish

REQUIRE(future.get() == 1);

REQUIRE(cnt == 100 * executor.num_workers());

REQUIRE(sum == executor.num_workers());

}

// Procedure: test_external_threads

template <typename T>

void test_external_threads(T& executor) {

constexpr int num_tasks = 65536;

std::vector<std::thread> threads;

std::atomic<size_t> sum {0};

for(int i=0; i<10; ++i) {

threads.emplace_back([&] () {

std::this_thread::sleep_for(std::chrono::microseconds(100));

for(int j=0; j<num_tasks; ++j) {

executor.emplace([&] () {

sum.fetch_add(1, std::memory_order_relaxed);

});

}

});

}

// master thread to insert

for(int j=0; j<num_tasks; ++j) {

executor.emplace([&] () {

sum.fetch_add(1, std::memory_order_relaxed);

});

}

// worker thread to insert

for(int i=0; i<10; ++i) {

executor.emplace([&] () {

for(int j=0; j<num_tasks; ++j) {

executor.emplace([&] () {

sum.fetch_add(1, std::memory_order_relaxed);

});

}

});

}

for(auto& t : threads) {

t.join();

}

while(sum != num_tasks * 10 * 2 + num_tasks) {

std::this_thread::yield();

}

// Procedure: test_batch_insertion

template <typename T>

void test_batch_insertion(T& executor) {

constexpr int num_iterations = 50;

size_t total {0};

std::atomic<size_t> count {0};

for(size_t i=1; i<num_iterations; i++) {

std::vector<std::function<void()>> funs;

for(size_t j=0; j<i; j++) {

funs.emplace_back([&](){count++;});

}

executor.batch(funs);

total += i;

}

while(count != total) {

std::this_thread::yield();

}

// Procedure: test_executor

template <typename T>

void test_executor() {

SUBCASE("Ownership") {