.. _gpu:

GPU implementation
==================

The principle for GPU implementation are consistent with
the general princples for DISPATCH as a code framework:

  * The implementation should be largely invisible to the
    solver code, requiring only classfication of array
    variables into ``to:``, ``from:``, ``tofrom``, and
    (most importantly) ``alloc:``.

  * Parallelization is achieved by running a large
    number of tasks simultaneously on the device, analogously
    with how a number of tasks are run simultaneously on
    multi-core CPUs

Details are given below

.. toctree::
   :maxdepth: 4

   principles.rst
   directives
   whole_tasks
   implementation
   implementation2