taskflow/unittests/test_sort.cpp at mw-3.6.1 · ModuleWorks/taskflow · GitHub

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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN

#include <doctest.h>

#include <taskflow/taskflow.hpp>

#include <taskflow/algorithm/sort.hpp>

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

// Data Type

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

struct MoveOnly1{

int a {-1234};

MoveOnly1() = default;

MoveOnly1(const MoveOnly1&) = delete;

MoveOnly1(MoveOnly1&&) = default;

MoveOnly1& operator = (const MoveOnly1& rhs) = delete;

MoveOnly1& operator = (MoveOnly1&& rhs) = default;

};

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

// parallel sort

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

template <typename T>

void ps_pod(size_t W, size_t N) {

std::srand(static_cast<unsigned int>(time(NULL)));

std::vector<T> data(N);

for(auto& d : data) {

d = ::rand() % 1000 - 500;

}

tf::Taskflow taskflow;

tf::Executor executor(W);

taskflow.sort(data.begin(), data.end());

executor.run(taskflow).wait();

REQUIRE(std::is_sorted(data.begin(), data.end()));

}

TEST_CASE("ParallelSort.int.1.100000") {

ps_pod<int>(1, 100000);

}

TEST_CASE("ParallelSort.int.2.100000") {

ps_pod<int>(2, 100000);

}

TEST_CASE("ParallelSort.int.3.100000") {

ps_pod<int>(3, 100000);

}

TEST_CASE("ParallelSort.int.4.100000") {

ps_pod<int>(4, 100000);

}

TEST_CASE("ParallelSort.ldouble.1.100000") {

ps_pod<long double>(1, 100000);

}

TEST_CASE("ParallelSort.ldouble.2.100000") {

ps_pod<long double>(2, 100000);

}

TEST_CASE("ParallelSort.ldouble.3.100000") {

ps_pod<long double>(3, 100000);

}

TEST_CASE("ParallelSort.ldouble.4.100000") {

ps_pod<long double>(4, 100000);

}

struct Object {

std::array<int, 10> integers;

int sum() const {

int s = 0;

for(const auto i : integers) {

s += i;

}

return s;

}

};

void ps_object(size_t W, size_t N) {

std::srand(static_cast<unsigned int>(time(NULL)));

std::vector<Object> data(N);

for(auto& d : data) {

for(auto& i : d.integers) {

i = ::rand();

}

tf::Taskflow taskflow;

tf::Executor executor(W);

taskflow.sort(data.begin(), data.end(), [](const auto& l, const auto& r){

return l.sum() < r.sum();

});

executor.run(taskflow).wait();

REQUIRE(std::is_sorted(data.begin(), data.end(),

[](const auto& l, const auto& r){ return l.sum() < r.sum(); }

));

}

TEST_CASE("ParallelSort.object.1.100000") {

ps_object(1, 100000);

}

TEST_CASE("ParallelSort.object.2.100000") {

ps_object(2, 100000);

}

TEST_CASE("ParallelSort.object.3.100000") {

ps_object(3, 100000);

}

TEST_CASE("ParallelSort.object.4.100000") {

ps_object(4, 100000);

}

void move_only_ps(unsigned W) {

std::vector<MoveOnly1> vec(1000000);

for(auto& i : vec) {

i.a = rand()%100;

}

tf::Taskflow taskflow;

tf::Executor executor(W);

taskflow.sort(vec.begin(), vec.end(),

[](const MoveOnly1& m1, const MoveOnly1&m2) {

return m1.a < m2.a;

}

);

executor.run(taskflow).wait();

for(size_t i=1; i<vec.size(); i++) {

REQUIRE(vec[i-1].a <= vec[i].a);

}

TEST_CASE("ParallelSort.MoveOnlyObject.1thread") {

move_only_ps(1);

}

TEST_CASE("ParallelSort.MoveOnlyObject.2threads") {

move_only_ps(2);

}

TEST_CASE("ParallelSort.MoveOnlyObject.3threads") {

move_only_ps(3);

}

TEST_CASE("ParallelSort.MoveOnlyObject.4threads") {

move_only_ps(4);

}

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

// Testcase: BubbleSort

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

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

for(unsigned w=1; w<=9; w+=2) {

tf::Executor executor(w);

for(int end=10; end <= 1000; end += 200) {

tf::Taskflow taskflow("BubbleSort");

std::vector<int> data(end);

for(auto& d : data) d = ::rand()%100;

auto gold = data;

std::sort(gold.begin(), gold.end());

std::atomic<bool>swapped;

// init task

auto init = taskflow.emplace([&swapped](){ swapped = false; });

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

if(swapped) {

swapped = false;

return 0;

}

return 1;

});

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

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

for(size_t i=0; i<data.size(); i+=2) {

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

if(i+1 < data.size() && data[i] > data[i+1]) {

std::swap(data[i], data[i+1]);

swapped = true;

}

});

}

});

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

for(size_t i=1; i<data.size(); i+=2) {

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

if(i+1 < data.size() && data[i] > data[i+1]) {

std::swap(data[i], data[i+1]);

swapped = true;

}

});

}

});

init.precede(even_phase).name("init");

even_phase.precede(odd_phase).name("even-swap");

odd_phase.precede(cond).name("odd-swap");

cond.precede(even_phase, stop).name("cond");

executor.run(taskflow).wait();

REQUIRE(gold == data);

}

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

// Testcase: SelectionSort

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

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

std::function<

void(tf::Subflow& sf, std::vector<int>&, int, int, int&)

> spawn;

spawn = [&] (

tf::Subflow& sf,

std::vector<int>& data,

int beg,

int end,

int& min

) mutable {

if(!(beg < end)) {

min = -1;

return;

}

if(end - beg == 1) {

min = beg;

return;

}

int m = (beg + end + 1) / 2;

auto minl = new int(-1);

auto minr = new int(-1);

auto SL = sf.emplace(

[&spawn, &data, beg, m, l=minl] (tf::Subflow& sf) mutable {

spawn(sf, data, beg, m, *l);

}).name(std::string("[")

+ std::to_string(beg)

+ ':'

+ std::to_string(m)

+ ')');

auto SR = sf.emplace(

[&spawn, &data, m, end, r=minr] (tf::Subflow& sf) mutable {

spawn(sf, data, m, end, *r);

}).name(std::string("[")

+ std::to_string(m)

+ ':'

+ std::to_string(end)

+ ')');

auto SM = sf.emplace([&data, &min, minl, minr] () {

if(*minl == -1) {

min = *minr;

}

else if(*minr == -1) {

min = *minl;

return;

}

else {

min = data[*minl] < data[*minr] ? *minl : *minr;

}

delete minl;

delete minr;

}).name(std::string("merge [")

+ std::to_string(beg)

+ ':'

+ std::to_string(end) + ')');

SM.succeed(SL, SR);

};

for(unsigned w=1; w<=9; w+=2) {

tf::Executor executor(w);

for(int end=16; end <= 512; end <<= 1) {

tf::Taskflow taskflow("SelectionSort");

std::vector<int> data(end);

for(auto& d : data) d = ::rand()%100;

auto gold = data;

std::sort(gold.begin(), gold.end());

int beg = 0;

int min = -1;

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

auto argmin = taskflow.emplace(

[&spawn, &data, &beg, end, &min](tf::Subflow& sf) mutable {

spawn(sf, data, beg, end, min);

}).name(std::string("[0")

+ ":"

+ std::to_string(end) + ")");

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

std::swap(data[beg], data[min]);

//std::cout << "select " << data[beg] << '\n';

beg++;

if(beg < end) {

min = -1;

return 0;

}

else return 1;

});

start.precede(argmin);

argmin.precede(putmin);

putmin.precede(argmin);

executor.run(taskflow).wait();

REQUIRE(gold == data);

//std::exit(1);

}

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

// Testcase: MergeSort

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

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

std::function<void(tf::Subflow& sf, std::vector<int>&, int, int)> spawn;

spawn = [&] (tf::Subflow& sf, std::vector<int>& data, int beg, int end) mutable {

if(!(beg < end) || end - beg == 1) {

return;

}

if(end - beg <= 5) {

std::sort(data.begin() + beg, data.begin() + end);

return;

}

int m = (beg + end + 1) / 2;

auto SL = sf.emplace([&spawn, &data, beg, m] (tf::Subflow& sf) {

spawn(sf, data, beg, m);

}).name(std::string("[")

+ std::to_string(beg)

+ ':'

+ std::to_string(m)

+ ')');

auto SR = sf.emplace([&spawn, &data, m, end] (tf::Subflow& sf) {

spawn(sf, data, m, end);

}).name(std::string("[")

+ std::to_string(m)

+ ':'

+ std::to_string(end)

+ ')');

auto SM = sf.emplace([&data, beg, end, m] () {

std::vector<int> tmpl, tmpr;

for(int i=beg; i<m; ++i) tmpl.push_back(data[i]);

for(int i=m; i<end; ++i) tmpr.push_back(data[i]);

// merge to data

size_t i=0, j=0, k=beg;

while(i<tmpl.size() && j<tmpr.size()) {

data[k++] = (tmpl[i] < tmpr[j] ? tmpl[i++] : tmpr[j++]);

}

// remaining SL

for(; i<tmpl.size(); ++i) data[k++] = tmpl[i];

// remaining SR

for(; j<tmpr.size(); ++j) data[k++] = tmpr[j];

}).name(std::string("merge [")

+ std::to_string(beg)

+ ':'

+ std::to_string(end) + ')');

SM.succeed(SL, SR);

};

for(unsigned w=1; w<=9; w+=2) {

tf::Executor executor(w);

for(int end=10; end <= 10000; end = end * 10) {

tf::Taskflow taskflow("MergeSort");

std::vector<int> data(end);

for(auto& d : data) d = ::rand()%100;

auto gold = data;

taskflow.emplace([&spawn, &data, end](tf::Subflow& sf){

spawn(sf, data, 0, end);

}).name(std::string("[0")

+ ":"

+ std::to_string(end) + ")");

executor.run(taskflow).wait();

std::sort(gold.begin(), gold.end());

REQUIRE(gold == data);

}

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

// Testcase: QuickSort

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

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

using itr_t = std::vector<int>::iterator;

std::function<void(tf::Subflow& sf, std::vector<int>&, itr_t, itr_t)> spawn;

spawn = [&] (

tf::Subflow& sf,

std::vector<int>& data,

itr_t beg,

itr_t end

) mutable {

if(!(beg < end) || std::distance(beg, end) == 1) {

return;

}

if(std::distance(beg, end) <= 5) {

std::sort(beg, end);

return;

}

auto pvt = beg + std::distance(beg, end) / 2;

std::iter_swap(pvt, end-1);

pvt = std::partition(beg, end-1, [end] (int item) {

return item < *(end - 1);

});

std::iter_swap(pvt, end-1);

sf.emplace([&spawn, &data, beg, pvt] (tf::Subflow& sf) {

spawn(sf, data, beg, pvt);

}).name(std::string("[")

+ std::to_string(beg-data.begin())

+ ':'

+ std::to_string(pvt-data.begin())

+ ')');

sf.emplace([&spawn, &data, pvt, end] (tf::Subflow& sf) {

spawn(sf, data, pvt+1, end);

}).name(std::string("[")

+ std::to_string(pvt-data.begin())

+ ':'

+ std::to_string(end-data.begin())

+ ')');

};

for(unsigned w=1; w<=9; w+=2) {

tf::Executor executor(w);

for(int end=16; end <= 16384; end <<= 1) {

tf::Taskflow taskflow("QuickSort");

std::vector<int> data(end);

for(auto& d : data) d = ::rand()%100;

auto gold = data;

taskflow.emplace([&spawn, &data](tf::Subflow& sf){

spawn(sf, data, data.begin(), data.end());

}).name(std::string("[0")

+ ":"

+ std::to_string(end) + ")");

executor.run(taskflow).wait();

std::sort(gold.begin(), gold.end());

REQUIRE(gold == data);

}

taskflow/unittests/test_sort.cpp at mw-3.6.1 · ModuleWorks/taskflow · GitHub

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