You plan to develop a Microsoft Message Passing Interface (MPI) application by using Microsoft Visual Studio. You have installed the Microsoft HPC Pack 2008 SDK at C:Program FilesMicrosoft HPC Pack 2008 SDK.You create a new console application. You need to ensure that the application compiles for a 64-bit architecture. Which two tasks should you perform? (Each correct answer presents part of the solution.
Choose two.)

You develop a parallel application that will be deployed on a Windows HPC Server 2008 cluster. You write the following code segment that computes an approximation to Pi. (Line numbers are included for reference only.)

01 static int totDarts = 10000;
02 int numDarts = 0;
04 MPI_Comm_size(MPI_COMM_WORLD, &commSize);
05 MPI_Comm_rank(MPI_COMM_WORLD, &commRank);
07 for(i = 0; i < totDarts; i++) {
08 x = 2 * (randomNr() – 0.5);
09 y = 2 * (randomNr() – 0.5);
10 if (x*x + y*y <= 1.0)
11 ++numDarts;
12 }
14 if(commRank == 0) {
15 pi = 4 * total/(commSize * totDarts);
16 printf("Pi = %dn", pi);
17 }

You need to ensure that the total number of numDarts is only available on the process that has a rank 0.
Which code segment should you insert at line 13?

You develop a parallel application that will be deployed on a Windows HPC Server 2008 cluster.The application uses point-to-point communication.

The process that has a rank 0 sends an array of integer values to the rank 1 process by using the following code segment. (Line numbers are included for reference only.)

01 int values[5];
02 MPI_Send(values, 5, MPI_INT, 1, 42,
03 MPI_COMM_WORLD);

You need to ensure that each receiving process is able to correctly receive the values in the most efficient manner possible.
Which code segment should you use?

You develop a parallel application that will be deployed on a Windows HPC Server 2008 cluster. You write the following code segment. (Line numbers are included for reference only.)

01 MPI_Init(&argc, &argv);
03 {
04 // program part for rank 0
06 }
06 else
07 {
08 // program part for all other ranks
09 }
10 MPI_Finalize();

You need to ensure that the code in the rank 0 section only executes on the process that has a rank of 0.
Which code segment should you insert at line 02?

You develop a parallel application that will be deployed on a Windows HPC Server 2008 cluster.You write the following code segment. (Line numbers are included for reference only.)

01 int rank;
02 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
03 // declaration of variable hostName
04 // code to execute
06 std::cout << "hostname of rank " << rank;
07 std::cout << ": " << hostName << "n";

You need to ensure that a variable named hostName contains the name of the cluster node that the code runs on.
Which code segment should you add at line 05?