HW2: RC3 - A small exchange optimization

homework_2/src/distsort.cpp

@@ -1,6 +1,6 @@
 /*!
  * \file
- * \brief   Distributed sort implementation.
+ * \brief   Distributed sort implementation
  *
  * \author
  *    Christos Choutouridis AEM:8997
@@ -9,8 +9,13 @@
 #include "utils.hpp"
 #include "distsort.hpp"
 
+//! Statistic variables for exchange optimization
+distStat_t localStat, remoteStat;
+
+//! Performance timers for each one of the "costly" functions
 Timing TfullSort, Texchange, Tminmax, TelbowSort;
 
+
 bool isActive(mpi_id_t node, size_t nodes) {
     if (!((nodes > 0) &&
           (nodes <= std::numeric_limits<mpi_id_t>::max()) ))

homework_2/src/main.cpp

@@ -138,6 +138,9 @@ bool validator(ShadowedDataT& data, mpi_id_t Processes, mpi_id_t rank) {
 }
 
 #if !defined TESTING
+/*!
+ * @return Returns 0, but.... we may throw or exit(1)
+ */
 int main(int argc, char* argv[]) try {
     // Initialize MPI environment
     mpi.init(&argc, &argv);
@@ -170,6 +173,7 @@ int main(int argc, char* argv[]) try {
         sleep(1);
 #endif
 
+    // Initialize local data
     logger << "Initialize local array of " << config.arraySize << " elements" << logger.endl;
     std::random_device rd;      // Mersenne seeded from hw if possible. range: [type_min, type_max]
     std::mt19937 gen(rd());
@@ -181,6 +185,7 @@ int main(int argc, char* argv[]) try {
     Data.resize(config.arraySize);
     std::generate(Data.begin(), Data.end(), [&]() { return dis(gen); });
 
+    // Run distributed sort
     if (mpi.rank() == 0)
         logger << "Starting distributed sorting ... ";
     Ttotal.start();
@@ -192,9 +197,9 @@ int main(int argc, char* argv[]) try {
     Ttotal.stop();
     if (mpi.rank() == 0)
         logger << " Done." << logger.endl;
-    std::string timeMsg = "rank " + std::to_string(mpi.rank());
 
 
+    // Print-outs and validation
     if (config.perf) {
             Ttotal.print_duration("Total     ", mpi.rank());
          TfullSort.print_duration("Full-Sort ", mpi.rank());
@@ -224,6 +229,9 @@ catch (std::exception& e) {
 #include <gtest/gtest.h>
 #include <exception>
 
+/*!
+ * The testing version of our program
+ */
 GTEST_API_ int main(int argc, char **argv) try {
    testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();