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Copy pathtest_subflows.cpp
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473 lines (370 loc) · 10.8 KB
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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <doctest.h>
#include <taskflow/taskflow.hpp>
#include <taskflow/algorithm/reduce.hpp>
// --------------------------------------------------------
// Testcase: JoinedSubflow
// --------------------------------------------------------
void joined_subflow(unsigned W) {
using namespace std::literals::chrono_literals;
SUBCASE("Trivial") {
tf::Executor executor(W);
tf::Taskflow tf;
// empty flow with future
tf::Task subflow3, subflow3_;
//std::future<int> fu3, fu3_;
std::atomic<int> fu3v{0}, fu3v_{0};
// empty flow
auto subflow1 = tf.emplace([&] (tf::Subflow& fb) {
fu3v++;
fb.join();
}).name("subflow1");
// nested empty flow
auto subflow2 = tf.emplace([&] (tf::Subflow& fb) {
fu3v++;
fb.emplace([&] (tf::Subflow& fb2) {
fu3v++;
fb2.emplace( [&] (tf::Subflow& fb3) {
fu3v++;
fb3.join();
}).name("subflow2_1_1");
}).name("subflow2_1");
}).name("subflow2");
subflow3 = tf.emplace([&] (tf::Subflow& fb) {
REQUIRE(fu3v == 4);
fu3v++;
fu3v_++;
subflow3_ = fb.emplace([&] (tf::Subflow& fb2) {
REQUIRE(fu3v_ == 3);
fu3v++;
fu3v_++;
//return 200;
fb2.join();
});
subflow3_.name("subflow3_");
// hereafter we use 100us to avoid dangling reference ...
auto s1 = fb.emplace([&] () {
fu3v_++;
fu3v++;
}).name("s1");
auto s2 = fb.emplace([&] () {
fu3v_++;
fu3v++;
}).name("s2");
auto s3 = fb.emplace([&] () {
fu3v++;
REQUIRE(fu3v_ == 4);
}).name("s3");
s1.precede(subflow3_);
s2.precede(subflow3_);
subflow3_.precede(s3);
REQUIRE(fu3v_ == 1);
//return 100;
});
subflow3.name("subflow3");
// empty flow to test future
auto subflow4 = tf.emplace([&] () {
fu3v++;
}).name("subflow4");
subflow1.precede(subflow2);
subflow2.precede(subflow3);
subflow3.precede(subflow4);
executor.run(tf).get();
// End of for loop
}
// Mixed intra- and inter- operations
SUBCASE("Complex") {
tf::Executor executor(W);
tf::Taskflow tf;
std::vector<int> data;
int sum {0};
auto A = tf.emplace([&data] () {
for(int i=0; i<10; ++i) {
data.push_back(1);
}
});
std::atomic<size_t> count {0};
auto B = tf.emplace([&count, &data, &sum](tf::Subflow& fb){
//auto [src, tgt] = fb.reduce(data.begin(), data.end(), sum, std::plus<int>());
auto task = fb.reduce(data.begin(), data.end(), sum, std::plus<int>());
fb.emplace([&sum] () { REQUIRE(sum == 0); }).precede(task);
task.precede(fb.emplace([&sum] () { REQUIRE(sum == 10); }));
for(size_t i=0; i<10; i ++){
++count;
}
auto n = fb.emplace([&count](tf::Subflow& fb2){
REQUIRE(count == 20);
++count;
auto prev = fb2.emplace([&count](){
REQUIRE(count == 21);
++count;
});
for(size_t i=0; i<10; i++){
auto next = fb2.emplace([&count, i](){
REQUIRE(count == 22+i);
++count;
});
prev.precede(next);
prev = next;
}
});
for(size_t i=0; i<10; i++){
fb.emplace([&count](){ ++count; }).precede(n);
}
});
A.precede(B);
executor.run(tf).get();
REQUIRE(count == 32);
REQUIRE(sum == 10);
}
}
TEST_CASE("JoinedSubflow.1thread" * doctest::timeout(300)){
joined_subflow(1);
}
TEST_CASE("JoinedSubflow.2threads" * doctest::timeout(300)){
joined_subflow(2);
}
TEST_CASE("JoinedSubflow.3threads" * doctest::timeout(300)){
joined_subflow(3);
}
TEST_CASE("JoinedSubflow.4threads" * doctest::timeout(300)){
joined_subflow(4);
}
TEST_CASE("JoinedSubflow.5threads" * doctest::timeout(300)){
joined_subflow(5);
}
TEST_CASE("JoinedSubflow.6threads" * doctest::timeout(300)){
joined_subflow(6);
}
TEST_CASE("JoinedSubflow.7threads" * doctest::timeout(300)){
joined_subflow(7);
}
TEST_CASE("JoinedSubflow.8threads" * doctest::timeout(300)){
joined_subflow(8);
}
// --------------------------------------------------------
// Testcase: DetachedSubflow
// --------------------------------------------------------
void detached_subflow(unsigned W) {
using namespace std::literals::chrono_literals;
SUBCASE("Trivial") {
tf::Executor executor(W);
tf::Taskflow tf;
// empty flow with future
tf::Task subflow3, subflow3_;
std::atomic<int> fu3v{0}, fu3v_{0};
// empty flow
auto subflow1 = tf.emplace([&] (tf::Subflow& fb) {
fu3v++;
fb.detach();
}).name("subflow1");
// nested empty flow
auto subflow2 = tf.emplace([&] (tf::Subflow& fb) {
fu3v++;
fb.emplace([&] (tf::Subflow& fb2) {
fu3v++;
fb2.emplace( [&] (tf::Subflow& fb3) {
fu3v++;
fb3.join();
}).name("subflow2_1_1");
fb2.detach();
}).name("subflow2_1");
fb.detach();
}).name("subflow2");
subflow3 = tf.emplace([&] (tf::Subflow& fb) {
REQUIRE((fu3v >= 2 && fu3v <= 4));
fu3v++;
fu3v_++;
subflow3_ = fb.emplace([&] (tf::Subflow& fb2) {
REQUIRE(fu3v_ == 3);
fu3v++;
fu3v_++;
fb2.join();
});
subflow3_.name("subflow3_");
// hereafter we use 100us to avoid dangling reference ...
auto s1 = fb.emplace([&] () {
fu3v_++;
fu3v++;
}).name("s1");
auto s2 = fb.emplace([&] () {
fu3v_++;
fu3v++;
}).name("s2");
auto s3 = fb.emplace([&] () {
fu3v++;
REQUIRE(fu3v_ == 4);
}).name("s3");
s1.precede(subflow3_);
s2.precede(subflow3_);
subflow3_.precede(s3);
REQUIRE(fu3v_ == 1);
fb.detach();
//return 100;
});
subflow3.name("subflow3");
// empty flow to test future
auto subflow4 = tf.emplace([&] () {
REQUIRE((fu3v >= 3 && fu3v <= 9));
fu3v++;
}).name("subflow4");
subflow1.precede(subflow2);
subflow2.precede(subflow3);
subflow3.precede(subflow4);
executor.run(tf).get();
REQUIRE(fu3v == 10);
REQUIRE(fu3v_ == 4);
}
}
TEST_CASE("DetachedSubflow.1thread" * doctest::timeout(300)) {
detached_subflow(1);
}
TEST_CASE("DetachedSubflow.2threads" * doctest::timeout(300)) {
detached_subflow(2);
}
TEST_CASE("DetachedSubflow.3threads" * doctest::timeout(300)) {
detached_subflow(3);
}
TEST_CASE("DetachedSubflow.4threads" * doctest::timeout(300)) {
detached_subflow(4);
}
TEST_CASE("DetachedSubflow.5threads" * doctest::timeout(300)) {
detached_subflow(5);
}
TEST_CASE("DetachedSubflow.6threads" * doctest::timeout(300)) {
detached_subflow(6);
}
TEST_CASE("DetachedSubflow.7threads" * doctest::timeout(300)) {
detached_subflow(7);
}
TEST_CASE("DetachedSubflow.8threads" * doctest::timeout(300)) {
detached_subflow(8);
}
// --------------------------------------------------------
// Testcase: TreeSubflow
// --------------------------------------------------------
void detach_spawn(const int max_depth, std::atomic<int>& counter, int depth, tf::Subflow& subflow) {
if(depth < max_depth) {
counter.fetch_add(1, std::memory_order_relaxed);
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfl){
detach_spawn(max_depth, counter, depth, sfl); }
);
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfr){
detach_spawn(max_depth, counter, depth, sfr); }
);
subflow.detach();
}
}
void join_spawn(const int max_depth, std::atomic<int>& counter, int depth, tf::Subflow& subflow) {
if(depth < max_depth) {
counter.fetch_add(1, std::memory_order_relaxed);
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfl){
join_spawn(max_depth, counter, depth, sfl); }
);
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfr){
join_spawn(max_depth, counter, depth, sfr); }
);
}
}
void mix_spawn(
const int max_depth, std::atomic<int>& counter, int depth, tf::Subflow& subflow
) {
if(depth < max_depth) {
auto ret = counter.fetch_add(1, std::memory_order_relaxed);
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfl){
mix_spawn(max_depth, counter, depth, sfl); }
).name(std::string("left") + std::to_string(ret%2));
subflow.emplace([&, max_depth, depth=depth+1](tf::Subflow& sfr){
mix_spawn(max_depth, counter, depth, sfr); }
).name(std::string("right") + std::to_string(ret%2));
if(ret % 2) {
subflow.detach();
}
}
}
TEST_CASE("TreeSubflow" * doctest::timeout(300)) {
SUBCASE("AllDetach") {
constexpr int max_depth {10};
for(int W=1; W<=4; W++) {
std::atomic<int> counter {0};
tf::Taskflow tf;
tf.emplace([&](tf::Subflow& subflow){
detach_spawn(max_depth, counter, 0, subflow);
});
tf::Executor executor(W);
executor.run(tf).get();
REQUIRE(counter == (1<<max_depth) - 1);
}
}
SUBCASE("AllJoin") {
constexpr int max_depth {10};
for(int W=1; W<=4; W++) {
std::atomic<int> counter {0};
tf::Taskflow tf;
tf.emplace([&](tf::Subflow& subflow){
join_spawn(max_depth, counter, 0, subflow);
});
tf::Executor executor(W);
executor.run(tf).get();
REQUIRE(counter == (1<<max_depth) - 1);
}
}
SUBCASE("Mix") {
constexpr int max_depth {10};
for(int W=1; W<=4; W++) {
std::atomic<int> counter {0};
tf::Taskflow tf;
tf.emplace([&](tf::Subflow& subflow){
mix_spawn(max_depth, counter, 0, subflow);
}).name("top task");
tf::Executor executor(W);
executor.run(tf).get();
REQUIRE(counter == (1<<max_depth) - 1);
}
}
}
// --------------------------------------------------------
// Testcase: FibSubflow
// --------------------------------------------------------
int fibonacci_spawn(int n, tf::Subflow& sbf) {
if (n < 2) return n;
int res1, res2;
sbf.emplace([&res1, n] (tf::Subflow& sbfl) { res1 = fibonacci_spawn(n - 1, sbfl); } );
sbf.emplace([&res2, n] (tf::Subflow& sbfr) { res2 = fibonacci_spawn(n - 2, sbfr); } );
REQUIRE(sbf.joinable() == true);
sbf.join();
REQUIRE(sbf.joinable() == false);
return res1 + res2;
}
void fibonacci(size_t W) {
int N = 20;
int res = -1; // result
tf::Executor executor(W);
tf::Taskflow taskflow;
taskflow.emplace([&res, N] (tf::Subflow& sbf) {
res = fibonacci_spawn(N, sbf);
});
executor.run(taskflow).wait();
REQUIRE(res == 6765);
}
TEST_CASE("FibSubflow.1thread") {
fibonacci(1);
}
TEST_CASE("FibSubflow.2threads") {
fibonacci(2);
}
TEST_CASE("FibSubflow.4threads") {
fibonacci(4);
}
TEST_CASE("FibSubflow.5threads") {
fibonacci(5);
}
TEST_CASE("FibSubflow.6threads") {
fibonacci(6);
}
TEST_CASE("FibSubflow.7threads") {
fibonacci(7);
}
TEST_CASE("FibSubflow.8threads") {
fibonacci(8);
}
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