update

19-20/mpi_examples/basic_send_omp/.#main.cpp

@@ -0,0 +1 @@
+ab0475@holly.coventry.ac.uk.69549

19-20/mpi_examples/basic_send_omp/main.cpp

@@ -22,9 +22,21 @@ int rank,size, namelen;
     std::cout << "> " <<node_name<<" Sent " << send_num << "  To  node"<< dest << std::endl;
   }
   if(rank == dest){
-         std::cout << " hello from "<< node_name<< std::endl;
+     std::cout << " hello from "<< node_name<< std::endl;
      MPI_Recv(&received, 1, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
+     // processing
      std::cout << "> Number: " << received << " Received by "<< node_name<< std::endl;
+
+    MPI_Send(&send_num, 1, MPI_INT, dest, 0, MPI_COMM_WORLD);
+    std::cout << "> " <<node_name<<" Sent " << send_num << "  To  node"<< dest << std::endl;
+     cond = true;
+  }
+
+  if (rank ==  0 && cond == true) {   
+     std::cout << " hello from "<< node_name<< std::endl;
+     MPI_Recv(&received, 1, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
   }
   MPI_Finalize();
 }

19-20/mpi_examples/main_for_presentation/main_for_presentation.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include "mpi.h"
+#include "omp.h"
+
+#include <cstring>
+int main(int argc, char** argv) {
+
+  // Initialize the MPI environment
+  MPI_Init(NULL, NULL);
+  char node_name[MPI_MAX_PROCESSOR_NAME];
+int rank,size, namelen;
+  int send_num = 5;
+  int received = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  MPI_Comm_size(MPI_COMM_WORLD, &size);
+  MPI_Get_processor_name(node_name, &namelen);
+  memset(node_name+namelen,0,MPI_MAX_PROCESSOR_NAME-namelen);
+  int dest = 1;//atoi(argv[2]); // change to command line inputs again if you want to vary these
+  int src = 0; //atoi(argv[1]);
+  if (rank == src) {   
+    MPI_Send(&send_num, 1, MPI_INT, dest, 0, MPI_COMM_WORLD);
+    std::cout << "> " <<node_name<<" Sent " << send_num << "  To  node"<< dest << std::endl;
+  }
+  if(rank == dest){
+     std::cout << " hello from "<< node_name<< std::endl;
+     MPI_Recv(&received, 1, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
+     // processing
+     std::cout << "> Number: " << received << " Received by "<< node_name<< std::endl;
+
+    MPI_Send(&send_num, 1, MPI_INT, dest, 0, MPI_COMM_WORLD);
+    std::cout << "> " <<node_name<<" Sent " << send_num << "  To  node"<< dest << std::endl;
+     cond = true;
+  }
+
+  if (rank ==  src && cond == true) {   
+     MPI_Recv(&received, 1, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
+  }
+  MPI_Finalize();
+}
+