##OPS

OPS is an API with associated libraries and pre-processors to generate parallel executables for applications on mulit-block structured grids.

This repository contains the implementation of the run-time library and the pre-processor, and is structured as follows:

• ops: Implementation of the user and run-time OPS C/C++ APIs

• apps: Application examples in C. These are examples of user application code and also include the target code an OPS pre-processor should produce to correctly use the OPS run-time library. Currently the main application developed with OPS is a single block structured mesh application - Cloverleaf originally developed at https://github.com/Warwick-PCAV/CloverLeaf

• translator: Python OPS pre-processor for C/C++ API

• doc: Documentation

####Installation

1. Set up environmental variables:

• OPS_COMPILER - compiler to be used (Currently supports Intel, PGI and Cray compilers, but others can be easily incorporated by extending the Makefiles used in step 2 and 3)
• OPS_INSTALL_PATH - Installation directory of OPS/ops
• CUDA_INSTALL_PATH - Installation directory of CUDA, usually /usr/local/cuda (to build CUDA libs and applications)
• OPENCL_INSTALL_PATH - Installation directory of OpenCL, usually /usr/local/cuda for NVIDIA OpenCL implementation (to build OpenCL libs and applications)
• MPI_INSTALL_PATH - Installation directory of MPI (to build MPI based distributed memory libs and applications)
• HDF5_INSTALL_PATH - Installation directory of HDF5 (to support HDF5 based File I/O)

See example scripts (e.g. source_intel, source_pgi_15.10, source_cray) under OPS/ops/ that sets up the environment for building with various compilers (Intel, PGI, Cray).

2. Build OPS back-end libraries.

For C/C++ back-end use Makefile under OPS/ops/c (modify Makefile if required). The libraries will be built in OPS/ops/c/lib

cd $OPS_INSTALL_PATH/c
make

For Fortran back-end use Makefile under OPS/ops/fortran (modify Makefile if required). The libraries will be built in OPS/ops/fortran/lib

cd $OPS_INSTALL_PATH/fortran
make

3. Build OPS example applications

For example to build CloverLeaf_3D under OPS/apps/c/CloverLeaf_3D

cd ../apps/c/Cloverleaf_3D/
make