.. _tut-phi: 

.. index::
      pair: Tutorial; Index

================
Intel Xeon Phi Jobs
================

RCC's Midway1 compute cluster contains two nodes with Intel Phi
co-processor (also known as Xeon Phi Knights Corner) cards. Each Phi compute node contains dual 8-core intel Sandy
Bridge processors, and two Intel Phi devices.

The Phi nodes are contained in the ``mic`` partition.  To compile software that interacts
with the Phi cards, you must use the Intel compilers available through these software
modules on Midway1:

.. code:: bash

   intelmpi/5.0+intel-15.0

Here is a basic quickstart using interactive mode that will execute the samples provided with the intel compiler suite:

.. code:: bash

    sinteractive -p mic --exclusive
    module load intelmpi/5.0+intel-15.0
    cp -r /software/intel/composer_xe_2015/Samples/en_US/C++/mic_samples/intro_sampleC ~/mictest
    cd ~/mictest
    make mic
    ./intro_sampleC.out


It is also possible to submit jobs via sbatch to the ``mic`` partition.  To do so,
the :option:`--partition=mic` option must be included in your submission script.

It should also be possible to compile and run OpenCL on the Phi cards without
any additional configuration. Use this `sample zip`_ from Intel to verify that
OpenCL is working

The Phi cards also mount the filesystem locally via NFS and it is possible
to create an SSH connection into the cards from an interactive session on the node.

.. _sample zip: https://software.intel.com/sites/default/files/managed/9e/f4/opencl-sample.zip