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// 2018/12/04 - modified by Tsung-Wei Huang
// - replaced privatized threadpool with work stealing threadpool
//
// 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 threadpool 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 SpeculativeThreadpool
// - 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/threadpool/threadpool.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);
}
// ============================================================================
// Threadpool tests
// ============================================================================
// Procedure: test_ownership
template <typename ThreadpoolType>
void test_ownership(ThreadpoolType& 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 ThreadpoolType>
void test_emplace(ThreadpoolType& 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& threadpool) {
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 = [&threadpool, &insert, &sum, &promise, &cnt] (int i) {
if(i > 0) {
++cnt;
threadpool.emplace([i=i-1, &insert] () {
insert(i);
});
}
else {
if(auto s = ++sum; s == threadpool.num_workers()) {
promise.set_value(1);
}
}
};
if(auto W = threadpool.num_workers(); W > 0) {
for(size_t i=0; i<threadpool.num_workers(); i++){
insert(100);
}
}
else {
promise.set_value(1);
}
// synchronize until all tasks finish
REQUIRE(future.get() == 1);
REQUIRE(cnt == 100 * threadpool.num_workers());
REQUIRE(sum == threadpool.num_workers());
}
// Procedure: test_external_threads
template <typename T>
void test_external_threads(T& threadpool) {
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) {
threadpool.emplace([&] () {
sum.fetch_add(1, std::memory_order_relaxed);
});
}
});
}
// master thread to insert
for(int j=0; j<num_tasks; ++j) {
threadpool.emplace([&] () {
sum.fetch_add(1, std::memory_order_relaxed);
});
}
// worker thread to insert
for(int i=0; i<10; ++i) {
threadpool.emplace([&] () {
for(int j=0; j<num_tasks; ++j) {
threadpool.emplace([&] () {
sum.fetch_add(1, std::memory_order_relaxed);
});
}
});
}
for(auto& t : threads) {
t.join();
}
while(sum != num_tasks * 10 * 2 + num_tasks) ;
}
// Procedure: test_batch_insertion
template <typename T>
void test_batch_insertion(T& threadpool) {
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++;});
}
threadpool.batch(std::move(funs));
total += i;
}
while(count != total);
}
// Procedure: test_threadpool
template <typename T>
void test_threadpool() {
SUBCASE("Ownership") {
for(unsigned i=0; i<=4; ++i) {
T tp(i);
test_ownership(tp);
}
}
SUBCASE("Emplace") {
for(unsigned i=0; i<=4; ++i) {
T tp(i);
test_emplace(tp);
}
}
SUBCASE("DynamicTasking") {
for(unsigned i=0; i<=4; ++i) {
T tp(i);
test_dynamic_tasking(tp);
}
}
SUBCASE("ExternalThreads") {
for(unsigned i=0; i<=4; ++i) {
T tp(i);
test_external_threads(tp);
}
}
SUBCASE("Batch") {
for(unsigned i=0; i<=4; ++i) {
T tp(i);
test_batch_insertion(tp);
}
}
}
// ----------------------------------------------------------------------------
// Testcase: SimpleThreadpool
// ----------------------------------------------------------------------------
TEST_CASE("SimpleThreadpool" * doctest::timeout(300)) {
test_threadpool<tf::SimpleThreadpool<std::function<void()>>>();
}
// ----------------------------------------------------------------------------
// Testcase: ProactiveThreadpool
// ----------------------------------------------------------------------------
TEST_CASE("ProactiveThreadpool" * doctest::timeout(300)) {
test_threadpool<tf::ProactiveThreadpool<std::function<void()>>>();
}
// ----------------------------------------------------------------------------
// Testcase: SpeculativeThreadpool
// ----------------------------------------------------------------------------
TEST_CASE("SpeculativeThreadpool" * doctest::timeout(300)) {
test_threadpool<tf::SpeculativeThreadpool<std::function<void()>>>();
}
// ----------------------------------------------------------------------------
// Testcase: WorkStealingThreadpool
// ----------------------------------------------------------------------------
TEST_CASE("WorkStealingThreadpool" * doctest::timeout(300)) {
test_threadpool<tf::WorkStealingThreadpool<std::function<void()>>>();
}
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