message: DOC: update execution model docs
diff: @@ -82,32 +82,31 @@ Execution Policy
  The :ref:`ExecutionPolicy` is specifed as the first template argument and is
  required by all of the constituent functions of the
  -:ref:`sections/execution_model`. Mint defines a set of high-level execution
  -policies, summarized in the table below.
  +:ref:`sections/execution_model`. Axom defines a set of high-level execution
  +spaces, summarized in the table below.
  -+-------------------------+------------------------+---------------------------------+
  ++----------------------------------+--------------------------------+---------------------------------+
  | Execution Policy | Requirements | Description |
  | | | |
  -+=========================+========================+=================================+
  -| **serial** | None. | Serial execution on |
  ++==================================+================================+=================================+
  +| **SEQ_EXEC** | None. | Sequential execution on |
  | | | the CPU. |
  -+-------------------------+------------------------+---------------------------------+
  -| **parallel_cpu** | `RAJA`_ + OpenMP | Parallel execution on |
  -| | | the CPU with OpenMP. |
  -+-------------------------+------------------------+---------------------------------+
  -| **parallel_gpu** | `RAJA`_ + CUDA | Parallel execution on |
  -| | | CUDA-enabled GPUs. |
  -+-------------------------+------------------------+---------------------------------+
  -| **parallel_gpu_async** | `RAJA`_ + CUDA | Asynchronous parallel |
  -| | | execution on CUDA-enabled GPUs. |
  -+-------------------------+------------------------+---------------------------------+
  -
  -These policies are mapped to corresponding `RAJA`_ execution policies internally.
  -
  -.. note::
  -
  - Mint's execution policies are encapsulated in the ``axom::mint::policy::``
  - namespace.
  ++----------------------------------+--------------------------------+---------------------------------+
  +| **OMP_EXEC** | `RAJA`_ + OpenMP | Parallel execution on |
  +| | | the CPU using OpenMP. |
  ++----------------------------------+--------------------------------+---------------------------------+
  +| **CUDA_EXEC< NBLOCKS >** | `RAJA`_ + CUDA + | Parallel execution on |
  +| | `Umpire`_ (memory management) | CUDA-enabled GPUs. |
  ++----------------------------------+--------------------------------+---------------------------------+
  +| **CUDA_EXEC< NBLOCKS, ASYNC >** | `RAJA`_ + CUDA | Asynchronous parallel |
  +| | `Umpire`_ (memory management) | execution on CUDA-enabled GPUs. |
  ++----------------------------------+--------------------------------+---------------------------------+
  +
  +Internally, the implementation uses the ``axom::execution_space`` traits object
  +to map each execution space to corresponding `RAJA`_ execution policies and
  +bind the default memory space for a given execution space. For example, the
  +default memory space for the ``axom::CUDA_EXEC`` execution space is unified
  +memory, which can be accessed from both the host (CPU ) and device (GPU).
  .. _executionSignature:
  