cpp-taskflow/unittests/basics.cpp at master · OSHO-1989/cpp-taskflow · GitHub

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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN

#include <doctest.h>

#include <taskflow/taskflow.hpp>

#include <vector>

#include <utility>

#include <chrono>

#include <limits.h>

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

// Testcase: Builder

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

TEST_CASE("Builder" * doctest::timeout(300)) {

const size_t num_tasks = 100;

tf::Taskflow taskflow;

tf::Executor executor;

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

std::vector<tf::Task> silent_tasks;

std::vector<tf::Task> tasks;

SUBCASE("EmptyFlow") {

for(unsigned W=1; W<32; ++W) {

tf::Executor executor(W);

tf::Taskflow taskflow;

REQUIRE(taskflow.num_tasks() == 0);

REQUIRE(taskflow.empty() == true);

executor.run(taskflow).wait();

}

SUBCASE("Placeholder") {

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

silent_tasks.emplace_back(taskflow.placeholder().name(std::to_string(i)));

}

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

REQUIRE(silent_tasks[i].name() == std::to_string(i));

REQUIRE(silent_tasks[i].num_dependents() == 0);

REQUIRE(silent_tasks[i].num_successors() == 0);

}

for(auto& task : silent_tasks) {

task.work([&counter](){ counter++; });

}

executor.run(taskflow).get();

REQUIRE(counter == num_tasks);

}

SUBCASE("EmbarrassinglyParallel"){

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

tasks.emplace_back(taskflow.emplace([&counter]() {counter += 1;}));

}

REQUIRE(taskflow.num_tasks() == num_tasks);

executor.run(taskflow).get();

REQUIRE(counter == num_tasks);

REQUIRE(taskflow.num_tasks() == 100);

counter = 0;

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

silent_tasks.emplace_back(taskflow.emplace([&counter]() {counter += 1;}));

}

REQUIRE(taskflow.num_tasks() == num_tasks * 2);

executor.run(taskflow).get();

REQUIRE(counter == num_tasks * 2);

REQUIRE(taskflow.num_tasks() == 200);

}

SUBCASE("BinarySequence"){

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

if(i%2 == 0){

tasks.emplace_back(

taskflow.emplace([&counter]() { REQUIRE(counter == 0); counter += 1;})

);

}

else{

tasks.emplace_back(

taskflow.emplace([&counter]() { REQUIRE(counter == 1); counter -= 1;})

);

}

if(i>0){

//tasks[i-1].first.precede(tasks[i].first);

tasks[i-1].precede(tasks[i]);

}

if(i==0) {

//REQUIRE(tasks[i].first.num_dependents() == 0);

REQUIRE(tasks[i].num_dependents() == 0);

}

else {

//REQUIRE(tasks[i].first.num_dependents() == 1);

REQUIRE(tasks[i].num_dependents() == 1);

}

executor.run(taskflow).get();

}

SUBCASE("LinearCounter"){

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

tasks.emplace_back(

taskflow.emplace([&counter, i]() {

REQUIRE(counter == i); counter += 1;}

)

);

if(i>0){

taskflow.precede(tasks[i-1], tasks[i]);

}

executor.run(taskflow).get();

REQUIRE(counter == num_tasks);

REQUIRE(taskflow.num_tasks() == num_tasks);

}

SUBCASE("Broadcast"){

auto src = taskflow.emplace([&counter]() {counter -= 1;});

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

silent_tasks.emplace_back(

taskflow.emplace([&counter]() {REQUIRE(counter == -1);})

);

}

taskflow.broadcast(src, silent_tasks);

executor.run(taskflow).get();

REQUIRE(counter == - 1);

REQUIRE(taskflow.num_tasks() == num_tasks);

}

SUBCASE("Succeed"){

auto dst = taskflow.emplace([&]() { REQUIRE(counter == num_tasks - 1);});

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

silent_tasks.emplace_back(

taskflow.emplace([&counter]() {counter += 1;})

);

}

taskflow.succeed(silent_tasks, dst);

executor.run(taskflow).get();

REQUIRE(counter == num_tasks - 1);

REQUIRE(taskflow.num_tasks() == num_tasks);

}

SUBCASE("MapReduce"){

auto src = taskflow.emplace([&counter]() {counter = 0;});

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

silent_tasks.emplace_back(

taskflow.emplace([&counter]() {counter += 1;})

);

}

taskflow.broadcast(src, silent_tasks);

auto dst = taskflow.emplace(

[&counter, num_tasks]() { REQUIRE(counter == num_tasks);}

);

taskflow.succeed(silent_tasks, dst);

executor.run(taskflow).get();

REQUIRE(taskflow.num_tasks() == num_tasks + 2);

}

SUBCASE("Linearize"){

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

silent_tasks.emplace_back(

taskflow.emplace([&counter, i]() {

REQUIRE(counter == i); counter += 1;}

)

);

}

taskflow.linearize(silent_tasks);

executor.run(taskflow).get();

REQUIRE(counter == num_tasks);

REQUIRE(taskflow.num_tasks() == num_tasks);

}

SUBCASE("Kite"){

auto src = taskflow.emplace([&counter]() {counter = 0;});

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

silent_tasks.emplace_back(

taskflow.emplace([&counter, i]() {

REQUIRE(counter == i); counter += 1; }

)

);

}

taskflow.broadcast(src, silent_tasks);

taskflow.linearize(silent_tasks);

auto dst = taskflow.emplace(

[&counter, num_tasks]() { REQUIRE(counter == num_tasks);}

);

taskflow.succeed(silent_tasks, dst);

executor.run(taskflow).get();

REQUIRE(taskflow.num_tasks() == num_tasks + 2);

}

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

// Testcase: Creation

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

TEST_CASE("Creation" * doctest::timeout(300)) {

std::vector<int> dummy(1000, -1);

auto create_taskflow = [&] () {

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

tf::Taskflow tf;

tf.parallel_for(dummy.begin(), dummy.end(), [] (int) {});

}

};

SUBCASE("One") {

create_taskflow();

REQUIRE(dummy.size() == 1000);

for(auto item : dummy) {

REQUIRE(item == -1);

}

SUBCASE("Two") {

std::thread t1(create_taskflow);

std::thread t2(create_taskflow);

t1.join();

t2.join();

REQUIRE(dummy.size() == 1000);

for(auto item : dummy) {

REQUIRE(item == -1);

}

SUBCASE("Four") {

std::thread t1(create_taskflow);

std::thread t2(create_taskflow);

std::thread t3(create_taskflow);

std::thread t4(create_taskflow);

t1.join();

t2.join();

t3.join();

t4.join();

REQUIRE(dummy.size() == 1000);

for(auto item : dummy) {

REQUIRE(item == -1);

}

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

// Testcase: STDFunction

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

TEST_CASE("STDFunction" * doctest::timeout(300)) {

tf::Taskflow taskflow;

tf::Executor executor;

int counter = 0;

std::function<void()> func1 = [&] () { ++counter; };

std::function<int()> func2 = [&] () { ++counter; return 0; };

std::function<void()> func3 = [&] () { };

std::function<void()> func4 = [&] () { ++counter;};

// scenario 1

auto A = taskflow.emplace(func1);

auto B = taskflow.emplace(func2);

auto C = taskflow.emplace(func3);

auto D = taskflow.emplace(func4);

A.precede(B);

B.precede(C, D);

executor.run(taskflow).wait();

REQUIRE(counter == 2);

// scenario 2

counter = 0;

A.work(func1);

B.work(func2);

C.work(func4);

D.work(func3);

executor.run(taskflow).wait();

REQUIRE(counter == 3);

// scenario 3

taskflow.clear();

std::tie(A, B, C, D) = taskflow.emplace(

std::move(func1), std::move(func2), std::move(func3), std::move(func4)

);

A.precede(B);

B.precede(C, D);

counter = 0;

executor.run(taskflow).wait();

REQUIRE(counter == 2);

}

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

// Testcase: Iterators

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

TEST_CASE("Iterators" * doctest::timeout(300)) {

SUBCASE("Order") {

tf::Taskflow taskflow;

auto A = taskflow.emplace([](){}).name("A");

auto B = taskflow.emplace([](){}).name("B");

auto C = taskflow.emplace([](){}).name("C");

auto D = taskflow.emplace([](){}).name("D");

auto E = taskflow.emplace([](){}).name("E");

A.precede(B, C, D, E);

E.succeed(B, C, D);

A.for_each_successor([&, i=0] (tf::Task s) mutable {

switch(i++) {

case 0:

REQUIRE(s == B);

break;

case 1:

REQUIRE(s == C);

break;

case 2:

REQUIRE(s == D);

break;

case 3:

REQUIRE(s == E);

break;

default:

break;

}

});

E.for_each_dependent([&, i=0](tf::Task s) mutable {

switch(i++) {

case 0:

REQUIRE(s == A);

break;

case 1:

REQUIRE(s == B);

break;

case 2:

REQUIRE(s == C);

break;

case 3:

REQUIRE(s == D);

break;

}

});

}

SUBCASE("Generic") {

tf::Taskflow taskflow;

auto A = taskflow.emplace([](){}).name("A");

auto B = taskflow.emplace([](){}).name("B");

auto C = taskflow.emplace([](){}).name("C");

auto D = taskflow.emplace([](){}).name("D");

auto E = taskflow.emplace([](){}).name("E");

std::vector<tf::Task> tasks;

taskflow.for_each_task([&tasks](tf::Task s){

tasks.push_back(s);

});

REQUIRE(std::find(tasks.begin(), tasks.end(), A) != tasks.end());

A.precede(B);

A.for_each_successor([B](tf::Task s){ REQUIRE(s==B); });

B.for_each_dependent([A](tf::Task s){ REQUIRE(s==A); });

A.precede(C);

A.precede(D);

A.precede(E);

C.precede(B);

D.precede(B);

E.precede(B);

int counter{0}, a{0}, b{0}, c{0}, d{0}, e{0};

A.for_each_successor([&](tf::Task s) {

counter++;

if(s == A) ++a;

if(s == B) ++b;

if(s == C) ++c;

if(s == D) ++d;

if(s == E) ++e;

});

REQUIRE(counter == A.num_successors());

REQUIRE(a==0);

REQUIRE(b==1);

REQUIRE(c==1);

REQUIRE(d==1);

REQUIRE(e==1);

counter = a = b = c = d = e = 0;

B.for_each_dependent([&](tf::Task s) {

counter++;

if(s == A) ++a;

if(s == B) ++b;

if(s == C) ++c;

if(s == D) ++d;

if(s == E) ++e;

});

REQUIRE(counter == B.num_dependents());

REQUIRE(a == 1);

REQUIRE(b == 0);

REQUIRE(c == 1);

REQUIRE(d == 1);

REQUIRE(e == 1);

A.for_each_successor([](tf::Task s){

s.name("A");

});

REQUIRE(A.name() == "A");

REQUIRE(B.name() == "A");

REQUIRE(C.name() == "A");

REQUIRE(D.name() == "A");

REQUIRE(E.name() == "A");

B.for_each_dependent([](tf::Task s){

s.name("B");

});

REQUIRE(A.name() == "B");

REQUIRE(B.name() == "A");

REQUIRE(C.name() == "B");

REQUIRE(D.name() == "B");

REQUIRE(E.name() == "B");

}

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

// Testcase: Hash

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

TEST_CASE("Hash" * doctest::timeout(300)) {

std::hash<tf::Task> hash;

// empty hash

tf::Task t1, t2;

REQUIRE(hash(t1) == hash(t2));

tf::Taskflow taskflow;

t1 = taskflow.emplace([](){});

REQUIRE(((hash(t1) != hash(t2)) || (hash(t1) == hash(t2) && t1 != t2)));

t2 = taskflow.emplace([](){});

REQUIRE(((hash(t1) != hash(t2)) || (hash(t1) == hash(t2) && t1 != t2)));

t2 = t1;

REQUIRE(hash(t1) == hash(t2));

}

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

// Testcase: SequentialRuns

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

void sequential_runs(unsigned W) {

using namespace std::chrono_literals;

size_t num_tasks = 100;

tf::Executor executor(W);

tf::Taskflow taskflow;

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

std::vector<tf::Task> silent_tasks;

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

silent_tasks.emplace_back(

taskflow.emplace([&counter]() {counter += 1;})

);

}

SUBCASE("RunOnce"){

auto fu = executor.run(taskflow);

REQUIRE(taskflow.num_tasks() == num_tasks);

fu.get();

REQUIRE(counter == num_tasks);

}

SUBCASE("WaitForAll") {

executor.run(taskflow);

executor.wait_for_all();

REQUIRE(counter == num_tasks);

}

SUBCASE("RunWithFuture") {

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

tf::Taskflow f;

auto A = f.emplace([&](){ count ++; });

auto B = f.emplace([&](tf::Subflow& subflow){

count ++;

auto B1 = subflow.emplace([&](){ count++; });

auto B2 = subflow.emplace([&](){ count++; });

auto B3 = subflow.emplace([&](){ count++; });

B1.precede(B3); B2.precede(B3);

});

auto C = f.emplace([&](){ count ++; });

auto D = f.emplace([&](){ count ++; });

A.precede(B, C);

B.precede(D);

C.precede(D);

std::list<std::future<void>> fu_list;

for(size_t i=0; i<500; i++) {

if(i == 499) {

executor.run(f).get(); // Synchronize the first 500 runs

executor.run_n(f, 500); // Run 500 times more

}

else if(i % 2) {

fu_list.push_back(executor.run(f));

}

else {

fu_list.push_back(executor.run(f, [&, i=i](){

REQUIRE(count == (i+1)*7); })

);

}

executor.wait_for_all();

for(auto& fu: fu_list) {

REQUIRE(fu.valid());

REQUIRE(fu.wait_for(std::chrono::seconds(1)) == std::future_status::ready);

}

REQUIRE(count == 7000);

}

SUBCASE("RunWithChange") {

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

tf::Taskflow f;

auto A = f.emplace([&](){ count ++; });

auto B = f.emplace([&](tf::Subflow& subflow){

count ++;

auto B1 = subflow.emplace([&](){ count++; });

auto B2 = subflow.emplace([&](){ count++; });

auto B3 = subflow.emplace([&](){ count++; });

B1.precede(B3); B2.precede(B3);

});

auto C = f.emplace([&](){ count ++; });

auto D = f.emplace([&](){ count ++; });

A.precede(B, C);

B.precede(D);

C.precede(D);

executor.run_n(f, 10).get();

REQUIRE(count == 70);

auto E = f.emplace([](){});

D.precede(E);

executor.run_n(f, 10).get();

REQUIRE(count == 140);

auto F = f.emplace([](){});

E.precede(F);

executor.run_n(f, 10);

executor.wait_for_all();

REQUIRE(count == 210);

}

SUBCASE("RunWithPred") {

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

tf::Taskflow f;

auto A = f.emplace([&](){ count ++; });

auto B = f.emplace([&](tf::Subflow& subflow){

count ++;

auto B1 = subflow.emplace([&](){ count++; });

auto B2 = subflow.emplace([&](){ count++; });

auto B3 = subflow.emplace([&](){ count++; });

B1.precede(B3); B2.precede(B3);

});

auto C = f.emplace([&](){ count ++; });

auto D = f.emplace([&](){ count ++; });

A.precede(B, C);

B.precede(D);

C.precede(D);

executor.run_until(f, [run=10]() mutable { return run-- == 0; },

[&](){

REQUIRE(count == 70);

count = 0;

}

).get();

executor.run_until(f, [run=10]() mutable { return run-- == 0; },

[&](){

REQUIRE(count == 70);

count = 0;

auto E = f.emplace([&](){ count ++; });

auto F = f.emplace([&](){ count ++; });

A.precede(E).precede(F);

});

executor.run_until(f, [run=10]() mutable { return run-- == 0; },

[&](){

REQUIRE(count == 90);

count = 0;

}

).get();

}

SUBCASE("MultipleRuns") {

std::atomic<size_t> counter(0);

tf::Taskflow tf1, tf2, tf3, tf4;

for(size_t n=0; n<16; ++n) {

tf1.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});

}

for(size_t n=0; n<1024; ++n) {

tf2.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});

}

for(size_t n=0; n<32; ++n) {

tf3.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});

}

for(size_t n=0; n<128; ++n) {

tf4.emplace([&](){counter.fetch_add(1, std::memory_order_relaxed);});

}

for(int i=0; i<200; ++i) {

executor.run(tf1);

executor.run(tf2);

executor.run(tf3);

executor.run(tf4);

}

executor.wait_for_all();

REQUIRE(counter == 240000);

}

TEST_CASE("SerialRuns.1thread" * doctest::timeout(300)) {

sequential_runs(1);

}

TEST_CASE("SerialRuns.2threads" * doctest::timeout(300)) {

sequential_runs(2);

}

TEST_CASE("SerialRuns.3threads" * doctest::timeout(300)) {

sequential_runs(3);

}

TEST_CASE("SerialRuns.4threads" * doctest::timeout(300)) {

sequential_runs(4);

}

TEST_CASE("SerialRuns.5threads" * doctest::timeout(300)) {

sequential_runs(5);

}

TEST_CASE("SerialRuns.6threads" * doctest::timeout(300)) {

sequential_runs(6);

}

TEST_CASE("SerialRuns.7threads" * doctest::timeout(300)) {

sequential_runs(7);

}

TEST_CASE("SerialRuns.8threads" * doctest::timeout(300)) {

sequential_runs(8);

}

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

// Testcase: WorkerID

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

void worker_id(unsigned w) {

tf::Taskflow taskflow;

tf::Executor executor(w);

for(int i=0; i<1000; i++) {

auto A = taskflow.emplace([&](){

auto id = executor.this_worker_id();

REQUIRE(id>=0);

REQUIRE(id< w);

});

auto B = taskflow.emplace([&](tf::Subflow& sf){

auto id = executor.this_worker_id();

REQUIRE(id>=0);

REQUIRE(id< w);

sf.emplace([&](){

auto id = executor.this_worker_id();

REQUIRE(id>=0);

REQUIRE(id< w);

});

sf.emplace([&](tf::Subflow&){

auto id = executor.this_worker_id();

REQUIRE(id>=0);

REQUIRE(id< w);

});

A.precede(B);

}

executor.run_n(taskflow, 100).wait();

}

TEST_CASE("WorkerID.1thread") {

worker_id(1);

}

TEST_CASE("WorkerID.2threads") {

worker_id(2);

}

TEST_CASE("WorkerID.3threads") {

worker_id(3);

}

TEST_CASE("WorkerID.4threads") {

worker_id(4);

}

TEST_CASE("WorkerID.5threads") {

worker_id(5);

}

TEST_CASE("WorkerID.6threads") {

worker_id(6);

}

TEST_CASE("WorkerID.7threads") {

worker_id(7);

}

TEST_CASE("WorkerID.8threads") {

worker_id(8);

}

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

// Testcase: ParallelRuns

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

void parallel_runs(unsigned w) {

std::atomic<int> counter;

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

auto make_taskflow = [&] (tf::Taskflow& tf) {

for(int i=0; i<1024; i++) {

auto A = tf.emplace([&] () {

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

});

auto B = tf.emplace([&] () {

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

});

A.precede(B);

}

};

SUBCASE("RunAndWait") {

tf::Executor executor(w);

counter = 0;

for(int t=0; t<32; t++) {

threads.emplace_back([&] () {

tf::Taskflow taskflow;

make_taskflow(taskflow);

executor.run(taskflow).wait();

});

}

for(auto& t : threads) {

t.join();

}

threads.clear();

REQUIRE(counter.load() == 32*1024*2);

}

SUBCASE("RunAndWaitForAll") {

tf::Executor executor(w);

counter = 0;

std::vector<std::unique_ptr<tf::Taskflow>> taskflows(32);

std::atomic<size_t> barrier(0);

for(int t=0; t<32; t++) {

threads.emplace_back([&, t=t] () {

taskflows[t] = std::make_unique<tf::Taskflow>();

make_taskflow(*taskflows[t]);

executor.run(*taskflows[t]);

++barrier; // make sure all runs are issued

});

}

while(barrier != 32);

executor.wait_for_all();

REQUIRE(counter.load() == 32*1024*2);

for(auto& t : threads) {

t.join();

}

threads.clear();

}

TEST_CASE("ParallelRuns.1thread" * doctest::timeout(300)) {

parallel_runs(1);

}

TEST_CASE("ParallelRuns.2threads" * doctest::timeout(300)) {

parallel_runs(2);

}

TEST_CASE("ParallelRuns.3threads" * doctest::timeout(300)) {

parallel_runs(3);

}

TEST_CASE("ParallelRuns.4threads" * doctest::timeout(300)) {

parallel_runs(4);

}

TEST_CASE("ParallelRuns.5threads" * doctest::timeout(300)) {

parallel_runs(5);

}

TEST_CASE("ParallelRuns.6threads" * doctest::timeout(300)) {

parallel_runs(6);

}

TEST_CASE("ParallelRuns.7threads" * doctest::timeout(300)) {

parallel_runs(7);

}

TEST_CASE("ParallelRuns.8threads" * doctest::timeout(300)) {

parallel_runs(8);

}

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

// Testcase: NestedRuns

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

void nested_runs(unsigned w) {

int counter {0};

struct A {

tf::Executor executor;

tf::Taskflow taskflow;

int& counter;

A(unsigned w, int& c) : executor{w}, counter{c} { }

void run()

{

taskflow.clear();

auto A1 = taskflow.emplace([&]() { counter++; });

auto A2 = taskflow.emplace([&]() { counter++; });

A1.precede(A2);

executor.run_n(taskflow, 10).wait();

}

};

struct B {

tf::Taskflow taskflow;

tf::Executor executor;

int& counter;

A a_sim;

B(unsigned w, int& c) : executor{w}, counter{c}, a_sim{w, c} { }

void run()

{

taskflow.clear();

auto B1 = taskflow.emplace([&] () { ++counter; });

auto B2 = taskflow.emplace([&] () { ++counter; a_sim.run(); });

B1.precede(B2);

executor.run_n(taskflow, 100).wait();

}

};

struct C {

tf::Taskflow taskflow;

tf::Executor executor;

int& counter;

B b_sim;

C(unsigned w, int& c) : executor{w}, counter{c}, b_sim{w, c} { }

void run()

{

taskflow.clear();

auto C1 = taskflow.emplace([&] () { ++counter; });

auto C2 = taskflow.emplace([&] () { ++counter; b_sim.run(); });

C1.precede(C2);

executor.run_n(taskflow, 100).wait();

}

};

C c(w, counter);

c.run();

REQUIRE(counter == 220200);

}

TEST_CASE("NestedRuns.1thread") {

nested_runs(1);

}

TEST_CASE("NestedRuns.2threads") {

nested_runs(2);

}

TEST_CASE("NestedRuns.3threads") {

nested_runs(3);

}

TEST_CASE("NestedRuns.4threads") {

nested_runs(4);

}

TEST_CASE("NestedRuns.8threads") {

nested_runs(8);

}

TEST_CASE("NestedRuns.16threads") {

nested_runs(16);

}

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

// Testcase: ParallelFor

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

void parallel_for(unsigned W) {

using namespace std::chrono_literals;

const auto mapper = [](unsigned w, size_t num_data, bool group){

tf::Executor executor(w);

tf::Taskflow tf;

std::vector<int> vec(num_data, 0);

tf.parallel_for(

vec.begin(), vec.end(), [] (int& v) { v = 64; }, group ? ::rand() : 0

);

for(const auto v : vec) {

REQUIRE(v == 0);

}

executor.run(tf);

executor.wait_for_all();

for(const auto v : vec) {

REQUIRE(v == 64);

}

};

const auto reducer = [](unsigned w, size_t num_data, bool group){

tf::Executor executor(w);

tf::Taskflow tf;

std::vector<int> vec(num_data, 0);

std::atomic<int> sum(0);

tf.parallel_for(vec.begin(), vec.end(), [&](auto) { ++sum; }, group ? ::rand() : 0);

REQUIRE(sum == 0);

executor.run(tf);

executor.wait_for_all();

REQUIRE(sum == vec.size());

};

// map

SUBCASE("Map") {

for(size_t num_data=1; num_data<=59049; num_data *= 3){

mapper(W, num_data, true);

mapper(W, num_data, false);

}

// reduce

SUBCASE("Reduce") {

for(size_t num_data=1; num_data<=59049; num_data *= 3){

reducer(W, num_data, true);

reducer(W, num_data, false);

View remainder of file in raw view

cpp-taskflow/unittests/basics.cpp at master · OSHO-1989/cpp-taskflow · GitHub

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