Cleanup code

.gitignore

@@ -1,4 +1,3 @@
-cmake-build-debug
+cmake-build-*
-cmake-build-release
 .idea
 task1/dataset.dat

CMakeLists.txt

@@ -1,16 +1,12 @@
 cmake_minimum_required(VERSION 3.0)
-project(task1)
+project(aca-tasks)
 
 set(CMAKE_CXX_STANDARD 20)
-#set(CMAKE_AUTOMOC ON)
-#set(CMAKE_AUTORCC ON)
-#set(CMAKE_AUTOUIC ON)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 set(CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/installed)
 
 if (${CMAKE_BUILD_TYPE} STREQUAL "Release")
-    #set(CMAKE_)
     add_compile_options(
             -Wall
             -Wpedantic

task1/CMakeLists.txt

@@ -17,7 +17,6 @@ add_custom_target(task1_7_dataset
         ${CMAKE_CURRENT_BINARY_DIR}/dataset.dat)
 
 add_executable(task1_7 main.cpp
-        mergesort.h
         mergesort_mt.h)
 
 target_link_libraries(task1_7 PRIVATE

task1/main.cpp

@@ -5,7 +5,6 @@
 #include <chrono>
 #include <cmath>
 
-#include <mergesort.h>
 #include <mergesort_mt.h>
 
 /*
@@ -30,9 +29,7 @@ auto parse_file(std::ifstream &stream, std::vector<T> &vec) -> void {
     T convbuf;
 
     while (std::getline(stream, buf)) {
-
         convbuf = static_cast<T>(std::stoul(buf));
-
         vec.emplace_back(std::move(convbuf));
     }
 
@@ -58,7 +55,7 @@ auto main(int argc, char *argv[]) -> int {
 
         auto t1 = std::chrono::high_resolution_clock::now();
         MergeSorterMT<int32_t> msst([](int32_t a, int32_t b) {
-            return (a>b);
+            return (a > b);
         }, 0);
         msst.sort(dataset_seq);
         auto t2 = std::chrono::high_resolution_clock::now();
@@ -71,32 +68,34 @@ auto main(int argc, char *argv[]) -> int {
         const int max_depth = std::log(threads);
 
         t1 = std::chrono::high_resolution_clock::now();
-        MergeSorterMT<int32_t > msmt([](int32_t a, int32_t b) {
+        MergeSorterMT<int32_t> msmt([](int32_t a, int32_t b) {
-            return (a>b);
+            return (a > b);
         }, max_depth);
         msmt.sort(dataset_par);
         t2 = std::chrono::high_resolution_clock::now();
 
         auto t_par = std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1);
-        fmt::print("\nSorted {} entries within {} ms in parallel using {} threads and a recursion depth of {}", dataset_seq.size(), t_par.count(), threads, max_depth);
+        fmt::print("\nSorted {} entries within {} ms in parallel on a system having {} threads and a recursion depth of {}"
+                   "\nresulting in a total count of {} threads",
+                   dataset_seq.size(), t_par.count(), threads, max_depth, std::pow(2, max_depth));
 
         auto eq = (dataset_seq == dataset_par);
-        fmt::print("\nCheck whether sorted arrays are equal: {}", (eq)? "Equal" : "not equal");
+        fmt::print("\nCheck whether sorted arrays are equal: {}", (eq) ? "Equal" : "not equal");
 
         fmt::print("\n\n------------Summary------------");
         fmt::print("\nt_seq   = {: > 5.2f} ms", static_cast<float>(t_seq.count()));
         fmt::print("\nt_par   = {: > 5.2f} ms", static_cast<float>(t_par.count()));
-        fmt::print("\nspeedup = {: > 5.2f}", (1.0*t_seq/t_par));
+        fmt::print("\nspeedup = {: > 5.2f}", (1.0 * t_seq / t_par));
         fmt::print("\nDelta_t = {: > 5.2f} ms", static_cast<float>(t_seq.count() - t_par.count()));
         fmt::print("\n-------------------------------");
 
         std::ofstream ofile("dataset.out.dat", std::ios_base::out);
-        if(!ofile.is_open()) {
+        if (!ofile.is_open()) {
             fmt::print("\nError writing to file");
             return -1;
         }
 
-        for(auto &element : dataset_seq) {
+        for (auto &element: dataset_seq) {
             ofile << std::to_string(element) << '\n';
         }
 

task1/mergesort_mt.h

@@ -2,6 +2,7 @@
 #include <span>
 #include <thread>
 #include <mutex>
+#include <functional>
 
 template<typename T>
 class MergeSorterMT {
@@ -14,7 +15,7 @@ public:
 
     auto sort(std::vector<T> &data) -> void {
         std::span<T> sortable(data);
-        split(sortable, 0, max_depth, mut);
+        split(sortable, 0, max_depth);
     }
 
 private:
@@ -47,14 +48,10 @@ private:
             r++;
         }
 
-        {
-            //todo: is a lock guard necessary?
-            //std::lock_guard<std::recursive_mutex> lock(mut);
         std::move(buf.begin(), buf.end(), output.begin());
     }
-    }
 
-    auto split(std::span<T> &data, int depth, const int &mdepth, std::recursive_mutex &mutex) -> void {
+    auto split(std::span<T> &data, int depth, const int &mdepth) -> void {
         if (std::distance(data.begin(), data.end()) <= 1) {
             return;
         } else if (std::distance(data.begin(), data.end()) == 2) {
@@ -71,17 +68,14 @@ private:
         std::span<T> right(mid, data.end());
 
         if (depth < mdepth) {
-            //todo: fix lambda call
+            std::thread left_thread([&]() { split(left, depth + 1, mdepth); });
-            //std::thread left_thread(&MergeSorterMT::split, this, left, depth + 1, mdepth, mutex);
+            std::thread right_thread([&]() { split(right, depth + 1, mdepth); });
-            //std::thread right_thread(&MergeSorterMT::split, this, right, depth + 1, mdepth, mutex);
-            std::thread left_thread([&]() { split(left, depth + 1, mdepth, mutex); });
-            std::thread right_thread([&]() { split(right, depth + 1, mdepth, mutex); });
 
             left_thread.join();
             right_thread.join();
         } else {
-            split(left, depth + 1, mdepth, mutex);
+            split(left, depth + 1, mdepth);
-            split(right, depth + 1, mdepth, mutex);
+            split(right, depth + 1, mdepth);
         }
 
         merge(data, left, right);
@@ -91,5 +85,4 @@ private:
 private:
     std::function<bool(T, T)> cmp;
     const int max_depth;
-    std::recursive_mutex mut;
 };