HP-MPI Version 2.0 for Windows Release Note

Hello world! I'm 1 of 4 on banach1

Hello world! I'm 3 of 4 on banach1

Hello world! I'm 0 of 4 on banach1

Hello world! I'm 2 of 4 on banach1

9.3 Building and Running Multihost on Windows HPCS Clusters

The following is an example of basic compilation and run steps to execute hello_world.c on

a cluster with 16-way parallelism. To build and run hello_world.c on a HPCS cluster:

1. Change to a writable directory on a mapped drive. Share the mapped drive to a folder for

the cluster.

2. Open a Visual Studio command window. (This example uses a 64-bit version, so a Visual

Studio 64-bit command window is opened.)

3. Compile the hello_world executable file:

X:\demo> set MPI_CC=cl

X:\demo> "%MPI_ROOT%\bin\mpicc" -mpi64 "%MPI_ROOT%\help\hello_world.c"

Microsoft® C/C++ Optimizing Compiler Version 14.00.50727.42 for 64-bit

hello_world.c

Microsoft® Incremental Linker Version 8.00.50727.42

/out:hello_world.exe

"/libpath:C:\Program Files (x86)\Hewlett-Packard\HP-MPI\lib"

/subsystem:console

libhpmpi64.lib

libmpio64.lib

hello_world.obj

4. Create a new job requesting the number of CPUs to use. Resources are not yet allocated, but

the job is given a JOBID number which is printed to stdout:

C:\> job new /numprocessors:16 /exclusive:true

Job queued, ID: 4288

5. Add a single-CPU mpirun task to the newly created job. The mpirun job creates more tasks

filling the rest of the resources with the compute ranks, resulting in a total of 16 compute

ranks for this example:

C:\> job add 4288 /numprocessors:1 /exclusive:true /stdout:\\node\path\to\a\shared\file.out

/stderr:\\node\path\to\a\shared\file.err "%MPI_ROOT%\bin\mpirun" -hpc \\node\path\to\hello_world.exe

6. Submit the job. The machine resources are allocated and the job is run.

C:\> job submit /id:4288

To run Multiple-Program Multiple-Data (MPMD) applications or other more complex

configurations that require further control over the application layout or environment, dynamically

create an appfile within the job using the utility "%MPI_ROOT%\bin\mpi_nodes.exe" as in

the following example. The environment variable %CCP_NODES% cannot be used for this purpose

because it only contains the single CPU resource used for the task that executes the mpirun

command. To create the executable, perform Steps 1 through 3 from the previous section. Then

continue with:

1. Create a new job.

C:\> job new /numprocessors:16 /exclusive:true

Job queued, ID: 4288

40 Compiling and Running Applications