taskflow/unittests/test_control_flow.cpp at task_isolation · ModuleWorks/taskflow · GitHub

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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN

#include <doctest.h>

#include <taskflow/taskflow.hpp>

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

// Testcase: Conditional Tasking

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

TEST_CASE("Cond.Types" * doctest::timeout(300)) {

tf::Taskflow taskflow;

auto explicit_c = [](){

return 1;

};

auto implicit_c = []() -> int {

return 2;

};

auto explicit_task = taskflow.emplace(explicit_c);

auto implicit_task = taskflow.emplace(implicit_c);

static_assert(tf::is_condition_task_v<decltype(explicit_c)>);

static_assert(tf::is_condition_task_v<decltype(implicit_c)>);

REQUIRE(explicit_task.type() == tf::TaskType::CONDITION);

REQUIRE(implicit_task.type() == tf::TaskType::CONDITION);

}

void conditional_spawn(

std::atomic<int>& counter,

const int max_depth,

int depth,

tf::Subflow& subflow

) {

if(depth < max_depth) {

for(int i=0; i<2; i++) {

auto A = subflow.emplace([&](){ counter++; });

auto B = subflow.emplace(

[&, max_depth, depth=depth+1](tf::Subflow& sf2){

conditional_spawn(counter, max_depth, depth, sf2);

});

auto C = subflow.emplace(

[&, max_depth, depth=depth+1](tf::Subflow& sf2){

conditional_spawn(counter, max_depth, depth, sf2);

}

);

auto cond = subflow.emplace([depth](){

if(depth%2) return 1;

else return 0;

}).precede(B, C);

A.precede(cond);

}

void loop_cond(unsigned w) {

tf::Executor executor(w);

tf::Taskflow taskflow;

int counter = -1;

int state = 0;

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

auto B = taskflow.emplace([&] () mutable {

REQUIRE((++counter % 100) == (++state % 100));

return counter < 100 ? 0 : 1;

});

auto C = taskflow.emplace(

[&] () {

REQUIRE(counter == 100);

counter = 0;

});

A.precede(B);

B.precede(B, C);

REQUIRE(A.num_strong_dependencies() == 0);

REQUIRE(A.num_weak_dependencies() == 0);

REQUIRE(A.num_predecessors() == 0);

REQUIRE(B.num_strong_dependencies() == 1);

REQUIRE(B.num_weak_dependencies() == 1);

REQUIRE(B.num_predecessors() == 2);

executor.run(taskflow).wait();

REQUIRE(counter == 0);

REQUIRE(state == 100);

executor.run(taskflow);

executor.run_n(taskflow, 10);

executor.wait_for_all();

REQUIRE(state == 1500);

}

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

loop_cond(1);

}

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

loop_cond(2);

}

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

loop_cond(3);

}

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

loop_cond(4);

}

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

// Testcase: FlipCoinCond

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

void flip_coin_cond(unsigned w) {

tf::Taskflow taskflow;

size_t rounds = 10000;

size_t steps = 0;

size_t total_steps = 0;

double average_steps = 0.0;

auto A = taskflow.emplace( [&](){ steps = 0; } );

auto B = taskflow.emplace( [&](){ ++steps; return std::rand()%2; } );

auto C = taskflow.emplace( [&](){ return std::rand()%2; } );

auto D = taskflow.emplace( [&](){ return std::rand()%2; } );

auto E = taskflow.emplace( [&](){ return std::rand()%2; } );

auto F = taskflow.emplace( [&](){ return std::rand()%2; } );

auto G = taskflow.emplace( [&]() mutable {

//++N; // a new round

total_steps += steps;

//avg = (double)accu/N;

//std::cout << "round " << N << ": steps=" << steps

// << " accumulated_steps=" << accu

// << " average_steps=" << avg << '\n';

}

);

A.precede(B).name("init");

B.precede(C, B).name("flip-coin-1");

C.precede(D, B).name("flip-coin-2");

D.precede(E, B).name("flip-coin-3");

E.precede(F, B).name("flip-coin-4");

F.precede(G, B).name("flip-coin-5");

//taskflow.dump(std::cout);

tf::Executor executor(w);

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

average_steps = total_steps / (double)rounds;

REQUIRE(std::fabs(average_steps-32.0)<1.0);

//taskflow.dump(std::cout);

}

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

flip_coin_cond(1);

}

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

flip_coin_cond(2);

}

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

flip_coin_cond(3);

}

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

flip_coin_cond(4);

}

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

// Testcase: CyclicCondition

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

void cyclic_cond(unsigned w) {

tf::Executor executor(w);

// ____________________

// | |

// v |

// S -> A -> Branch -> many branches -> T

// Make sure each branch will be passed through exactly once

// and the T (target) node will also be passed

tf::Taskflow flow;

auto S = flow.emplace([](){});

int num_iterations = 0;

const int total_iteration = 1000;

auto A = flow.emplace([&](){ num_iterations ++; });

S.precede(A);

int sel = 0;

bool pass_T = false;

std::vector<bool> pass(total_iteration, false);

auto T = flow.emplace([&](){

REQUIRE(num_iterations == total_iteration); pass_T=true; }

);

auto branch = flow.emplace([&](){ return sel++; });

A.precede(branch);

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

auto t = flow.emplace([&, i](){

if(num_iterations < total_iteration) {

REQUIRE(!pass[i]);

pass[i] = true;

return 0;

}

// The last node will come to here (last iteration)

REQUIRE(!pass[i]);

pass[i] = true;

return 1;

});

branch.precede(t);

t.precede(A);

t.precede(T);

}

executor.run(flow).get();

REQUIRE(pass_T);

for(size_t i=0; i<pass.size(); i++) {

REQUIRE(pass[i]);

}

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

cyclic_cond(1);

}

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

cyclic_cond(2);

}

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

cyclic_cond(3);

}

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

cyclic_cond(4);

}

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

cyclic_cond(5);

}

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

cyclic_cond(6);

}

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

cyclic_cond(7);

}

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

cyclic_cond(8);

}

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

// BTreeCond

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

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

for(unsigned w=1; w<=8; ++w) {

for(int l=1; l<12; l++) {

tf::Taskflow flow;

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

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

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

int level = l;

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

tasks.clear();

for(int j=0; j< (1<<i); j++) {

if(i % 2 == 0) {

tasks.emplace_back(flow.emplace([&](){ counter++; }) );

}

else {

if(j%2) {

tasks.emplace_back(flow.emplace([](){ return 1; }));

}

else {

tasks.emplace_back(flow.emplace([](){ return 0; }));

}

for(size_t j=0; j<prev_tasks.size(); j++) {

prev_tasks[j].precede(tasks[2*j] );

prev_tasks[j].precede(tasks[2*j + 1]);

}

tasks.swap(prev_tasks);

}

tf::Executor executor(w);

executor.run(flow).wait();

REQUIRE(counter == (1<<((level+1)/2)) - 1);

}

// ---- > B

// |

// A -> Cond -

// |

// ---- > C

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

for(unsigned w=1; w<=8; ++w) {

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

constexpr int max_depth = 6;

tf::Taskflow flow;

flow.emplace([&](tf::Subflow& subflow) {

counter++;

conditional_spawn(counter, max_depth, 0, subflow); }

);

tf::Executor executor(w);

executor.run_n(flow, 4).get();

// Each run increments the counter by (2^(max_depth+1) - 1)

REQUIRE(counter.load() == ((1<<(max_depth+1)) - 1)*4);

}

// ______

// | |

// v |

// S -> A -> cond

void nested_cond(unsigned w) {

const int outer_loop = 3;

const int mid_loop = 4;

const int inner_loop = 5;

int counter {0};

tf::Taskflow flow;

auto S = flow.emplace([](){});

auto A = flow.emplace([&] (tf::Subflow& subflow) mutable {

// ___________

// | |

// v |

// S1 -> A1 -> B1 -> cond

auto S1 = subflow.emplace([](){ });

auto A1 = subflow.emplace([](){ }).succeed(S1);

auto B1 = subflow.emplace([&](tf::Subflow& sf){

// ___________

// | |

// v |

// S2 -> A2 -> B2 -> cond

// |

// -----> C

// -----> D

// -----> E

auto S2 = sf.emplace([](){});

auto A2 = sf.emplace([](){}).succeed(S2);

auto B2 = sf.emplace([&](){ counter++; }).succeed(A2);

sf.emplace([&, repeat=0]() mutable {

if(repeat ++ < inner_loop)

return 0;

repeat = 0;

return 1;

}).succeed(B2).precede(A2).name("cond");

// Those are redundant tasks

sf.emplace([](){}).succeed(A2).name("C");

sf.emplace([](){}).succeed(A2).name("D");

sf.emplace([](){}).succeed(A2).name("E");

}).succeed(A1);

subflow.emplace([&, repeat=0]() mutable {

if(repeat ++ < mid_loop)

return 0;

repeat = 0;

return 1;

}).succeed(B1).precede(A1).name("cond");

}).succeed(S);

flow.emplace(

[&, repeat=0]() mutable {

if(repeat ++ < outer_loop) {

return 0;

}

repeat = 0;

return 1;

}

).succeed(A).precede(A);

tf::Executor executor(w);

const int repeat = 10;

executor.run_n(flow, repeat).get();

REQUIRE(counter == (inner_loop+1)*(mid_loop+1)*(outer_loop+1)*repeat);

}

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

nested_cond(1);

}

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

nested_cond(2);

}

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

nested_cond(3);

}

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

nested_cond(4);

}

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

nested_cond(5);

}

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

nested_cond(6);

}

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

nested_cond(7);

}

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

nested_cond(8);

}

// ________________

// | ___ ______ |

// | | | | | |

// v v | v | |

// S -> A -> cond1 -> cond2 -> D

// |

// ----> B

void cond2cond(unsigned w) {

const int repeat = 10;

tf::Taskflow flow;

int num_visit_A {0};

int num_visit_C1 {0};

int num_visit_C2 {0};

int iteration_C1 {0};

int iteration_C2 {0};

auto S = flow.emplace([](){});

auto A = flow.emplace([&](){ num_visit_A++; }).succeed(S);

auto cond1 = flow.emplace([&]() mutable {

num_visit_C1++;

iteration_C1++;

if(iteration_C1 == 1) return 0;

return 1;

}).succeed(A).precede(A);

auto cond2 = flow.emplace([&]() mutable {

num_visit_C2 ++;

return iteration_C2++;

}).succeed(cond1).precede(cond1, A);

flow.emplace([](){ REQUIRE(false); }).succeed(cond1).name("B");

flow.emplace([&](){

iteration_C1 = 0;

iteration_C2 = 0;

}).succeed(cond2).name("D");

tf::Executor executor(w);

executor.run_n(flow, repeat).get();

REQUIRE(num_visit_A == 3*repeat);

REQUIRE(num_visit_C1 == 4*repeat);

REQUIRE(num_visit_C2 == 3*repeat);

}

TEST_CASE("Cond2Cond.1thread" * doctest::timeout(300)) {

cond2cond(1);

}

TEST_CASE("Cond2Cond.2threads" * doctest::timeout(300)) {

cond2cond(2);

}

TEST_CASE("Cond2Cond.3threads" * doctest::timeout(300)) {

cond2cond(3);

}

TEST_CASE("Cond2Cond.4threads" * doctest::timeout(300)) {

cond2cond(4);

}

TEST_CASE("Cond2Cond.5threads" * doctest::timeout(300)) {

cond2cond(5);

}

TEST_CASE("Cond2Cond.6threads" * doctest::timeout(300)) {

cond2cond(6);

}

TEST_CASE("Cond2Cond.7threads" * doctest::timeout(300)) {

cond2cond(7);

}

TEST_CASE("Cond2Cond.8threads" * doctest::timeout(300)) {

cond2cond(8);

}

void hierarchical_condition(unsigned w) {

tf::Executor executor(w);

tf::Taskflow tf0("c0");

tf::Taskflow tf1("c1");

tf::Taskflow tf2("c2");

tf::Taskflow tf3("top");

int c1, c2, c2_repeat;

auto c1A = tf1.emplace( [&](){ c1=0; } );

auto c1B = tf1.emplace( [&, state=0] () mutable {

REQUIRE(state++ % 100 == c1 % 100);

});

auto c1C = tf1.emplace( [&](){ return (++c1 < 100) ? 0 : 1; });

c1A.precede(c1B);

c1B.precede(c1C);

c1C.precede(c1B);

c1A.name("c1A");

c1B.name("c1B");

c1C.name("c1C");

auto c2A = tf2.emplace( [&](){ REQUIRE(c2 == 100); c2 = 0; } );

auto c2B = tf2.emplace( [&, state=0] () mutable {

REQUIRE((state++ % 100) == (c2 % 100));

});

auto c2C = tf2.emplace( [&](){ return (++c2 < 100) ? 0 : 1; });

c2A.precede(c2B);

c2B.precede(c2C);

c2C.precede(c2B);

c2A.name("c2A");

c2B.name("c2B");

c2C.name("c2C");

auto init = tf3.emplace([&](){

c1=c2=c2_repeat=0;

}).name("init");

auto loop1 = tf3.emplace([&](){

return (++c2 < 100) ? 0 : 1;

}).name("loop1");

auto loop2 = tf3.emplace([&](){

c2 = 0;

return ++c2_repeat < 100 ? 0 : 1;

}).name("loop2");

auto sync = tf3.emplace([&](){

REQUIRE(c2==0);

REQUIRE(c2_repeat==100);

c2_repeat = 0;

}).name("sync");

auto grab = tf3.emplace([&](){

REQUIRE(c1 == 100);

REQUIRE(c2 == 0);

REQUIRE(c2_repeat == 0);

}).name("grab");

auto mod0 = tf3.composed_of(tf0).name("module0");

auto mod1 = tf3.composed_of(tf1).name("module1");

auto sbf1 = tf3.emplace([&](tf::Subflow& sbf){

auto sbf1_1 = sbf.emplace([](){}).name("sbf1_1");

auto module1 = sbf.composed_of(tf1).name("module1");

auto sbf1_2 = sbf.emplace([](){}).name("sbf1_2");

sbf1_1.precede(module1);

module1.precede(sbf1_2);

sbf.join();

}).name("sbf1");

auto mod2 = tf3.composed_of(tf2).name("module2");

init.precede(mod0, sbf1, loop1);

loop1.precede(loop1, mod2);

loop2.succeed(mod2).precede(loop1, sync);

mod0.precede(grab);

sbf1.precede(mod1);

mod1.precede(grab);

sync.precede(grab);

executor.run(tf3);

executor.run_n(tf3, 10);

executor.wait_for_all();

//tf3.dump(std::cout);

}

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

hierarchical_condition(1);

}

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

hierarchical_condition(2);

}

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

hierarchical_condition(3);

}

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

hierarchical_condition(4);

}

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

hierarchical_condition(5);

}

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

hierarchical_condition(6);

}

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

hierarchical_condition(7);

}

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

hierarchical_condition(8);

}

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

// CondSubflow

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

void condition_subflow(unsigned W) {

tf::Taskflow taskflow;

tf::Executor executor(W);

const size_t I = 1000;

std::vector<size_t> data(I);

size_t i;

auto init = taskflow.emplace([&](){ i = 0; }).name("init");

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

sf.emplace([&, i](){

REQUIRE(i<I);

data[i] = i*(i+1)/2*123;;

}).name(std::to_string(i));

}).name("subflow");

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

if(++i < I) return 0;

return 1;

}).name("cond");

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

init.precede(subflow);

subflow.precede(cond);

cond.precede(subflow, stop);

executor.run(taskflow).wait();

REQUIRE(taskflow.num_tasks() == 4);

for(size_t j=0; j<data.size(); ++j) {

REQUIRE(data[j] == j*(j+1)/2*123);

data[j] = 0;

}

executor.run_n(taskflow, 1);

executor.run_n(taskflow, 10);

executor.run_n(taskflow, 100);

executor.wait_for_all();

REQUIRE(taskflow.num_tasks() == 4);

for(size_t j=0; j<data.size(); ++j) {

REQUIRE(data[j] == j*(j+1)/2*123);

}

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

condition_subflow(1);

}

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

condition_subflow(2);

}

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

condition_subflow(3);

}

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

condition_subflow(4);

}

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

condition_subflow(5);

}

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

condition_subflow(6);

}

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

condition_subflow(7);

}

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

condition_subflow(8);

}

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

// Multi-conditional tasking

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

TEST_CASE("MultiCond.Types" * doctest::timeout(300)) {

tf::Taskflow taskflow;

auto explicit_mc = [](){

tf::SmallVector<int> v;

return v;

};

auto implicit_mc = []() -> tf::SmallVector<int> {

return {1, 2, 3, 9};

};

auto explicit_task = taskflow.emplace(explicit_mc);

auto implicit_task = taskflow.emplace(implicit_mc);

static_assert(tf::is_multi_condition_task_v<decltype(explicit_mc)>);

static_assert(tf::is_multi_condition_task_v<decltype(implicit_mc)>);

REQUIRE(explicit_task.type() == tf::TaskType::CONDITION);

REQUIRE(implicit_task.type() == tf::TaskType::CONDITION);

}

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

// Testcase: Multiple Branches

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

void multiple_branches(unsigned W) {

tf::Executor executor(W);

tf::Taskflow taskflow;

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

auto A = taskflow.placeholder();

for(int i=0; i<100; i++) {

auto X = taskflow.emplace([&](){ counter.fetch_add(1, std::memory_order_relaxed); });

auto Y = taskflow.emplace([&](){ counter.fetch_add(1, std::memory_order_relaxed); });

X.precede(Y);

A.precede(X);

}

int ans = 0;

tf::SmallVector<int> conds;

for(int i=-10; i<=110; i++) {

if(::rand() % 10 == 0) {

conds.push_back(i);

if(0<=i && i<100) {

ans++;

}

A.work([&]() { return conds; });

executor.run(taskflow).wait();

REQUIRE(2*ans == counter);

}

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

multiple_branches(1);

}

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

multiple_branches(2);

}

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

multiple_branches(3);

}

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

multiple_branches(4);

}

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

multiple_branches(5);

}

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

multiple_branches(6);

}

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

multiple_branches(7);

}

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

multiple_branches(8);

}

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

// Testcase: Multiple Loops

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

void multiple_loops(unsigned W) {

tf::Executor executor(W);

tf::Taskflow taskflow;

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

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

auto B = taskflow.emplace([&, i=bool{true}, c = int(0)]() mutable -> tf::SmallVector<int> {

if(i) {

i = false;

return {0, 1};

}

else {

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

return {++c < 10 ? 0 : -1};

}

});

auto C = taskflow.emplace([&, i=bool{true}, c = int(0)]() mutable -> tf::SmallVector<int> {

if(i) {

i = false;

return {0, 1};

}

else {

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

return {++c < 10 ? 0 : -1};

}

});

auto D = taskflow.emplace([&, i=bool{true}, c = int(0)]() mutable -> tf::SmallVector<int> {

if(i) {

i = false;

return {0, 1};

}

else {

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

return {++c < 10 ? 0 : -1};

}

});

auto E = taskflow.emplace([&, i=bool{true}, c = int(0)]() mutable -> tf::SmallVector<int> {

if(i) {

i = false;

return {0, 1};

}

else {

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

return {++c < 10 ? 0 : -1};

}

});

A.precede(B);

B.precede(B, C);

C.precede(C, D);

D.precede(D, E);

E.precede(E);

executor.run(taskflow).wait();

//taskflow.dump(std::cout);

REQUIRE(counter == 40);

}

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

multiple_loops(1);

}

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

multiple_loops(2);

}

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

multiple_loops(3);

}

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

multiple_loops(4);

}

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

multiple_loops(5);

}

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

multiple_loops(6);

}

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

multiple_loops(7);

}

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

multiple_loops(8);

}

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

// binary tree

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

void binary_tree(unsigned w) {

const int N = 10;

tf::Taskflow taskflow;

tf::Executor executor(w);

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

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

for(int i=1; i<(1<<N); i++) {

tasks.emplace_back(taskflow.emplace([&counter]() -> tf::SmallVector<int>{

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

return {0, 1};

}));

}

for(size_t i=0; i<tasks.size(); i++) {

size_t l = i*2+1;

size_t r = l + 1;

if(l < tasks.size()) tasks[i].precede(tasks[l]);

if(r < tasks.size()) tasks[i].precede(tasks[r]);

}

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

REQUIRE(((1<<N)-1)*N == counter);

}

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

binary_tree(1);

}

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

binary_tree(2);

}

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

binary_tree(3);

}

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

binary_tree(4);

}

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

// Multi Cond Multiple Runs

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

void multi_cond_multiple_runs(unsigned W) {

tf::Executor executor(W);

tf::Taskflow taskflow;

bool flag = false;

auto [init, cond1, cond2, yes, no] = taskflow.emplace(

[] () { },

[] () { return 0; },

[] () { return 1; },

[&]() { flag = true; },

[] () { }

);

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taskflow/unittests/test_control_flow.cpp at task_isolation · ModuleWorks/taskflow · GitHub

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