User`s guide

3. Troubleshooting

This section explains how to test the Intel® MPI Library installation and how to run a test

program.

3.1. Testing Installation

To ensure that the Intel® MPI Library is installed and functioning, complete a general testing,

compile and run a test program.

To test the installation:

1. Verify through the Computer Management that the Hydra service is started. It calls the

Intel MPI Process Manager.

2. Verify that <installdir>\intel64\bin for the Intel® 64 architecture in the 64-bit

mode is in your path:

> echo %PATH%

You should see the correct path for each node you test.

3. (SDK only) If you use Intel® compilers, verify that the appropriate directories are

included in the PATH and LIB environment variables:

> mpiexec.exe -hosts 2 host1 1 host2 1 a.bat

where a.bat contains

echo %PATH%

You should see the correct directories for these path variables for each node you test. If not,

call the appropriate compilervars.bat scripts. For example, with Intel® C++ Compiler

14.0 for Windows*OS for the Intel® 64 architecture in the 64-bit mode, use the Windows OS

program menu to select:

Intel(R) Parallel Studio XE 2013 > Command Prompt > Intel 64 Visual Studio 2012 mode or

from the command line

%ProgramFiles%\Intel\Composer XE\bin\iclvars.bat

3.2. Compiling and Running a Test Program

The install directory <installdir>\test contains test programs which you can use for testing. To

compile one of them or your test program, do the following:

1. (SDK only) Compile a test program as described in Section 2.4 Compiling and Linking.

2. If you are using InfiniBand* or other RDMA-capable network hardware and software, verify

that everything is functioning.

3. Run the test program with all available configurations on your cluster.

4. Test the TCP/IP-capable network fabric using:

$ mpiexec -n 2 -env I_MPI_DEBUG 2 -env I_MPI_FABRICS tcp ./myprog