MARS is an open-source mesh management library designed to handle N-dimensional elements (N <= 4). MARS is developed in C++ and makes use of template meta-programming to have compile time dimensions of elements and vectors, thus allowing for both compile time performance optimizations and concise and reusable code.

The main features of MARS consist of:

1. Parallel mesh generation

2. Adaptive mesh refinement using bisection algorithms

3. Conforming mesh data-structure

4. Mesh quality estimators to study the output of different mesh-refinement strategies

5. Performance portable algorithms and data-structures targetting different accelerators

6. Performance portable space filling curves algorithms for efficient mesh management.

MARS targets multi-core CPUs and GPUs using the C++ Kokkos programming model. The mesh is entirely constructed and stored on the device (GPUs). This enables libraries using MARS to perform further operations directly on the device, avoiding going through the host.

Currently, MARS supports as its performance portable, parallel, adaptive refinement based algorithm the LEPP (Longest edge propagation path) from Rivara. Mesh generation is fully supported in parallel.

Performance portable forest of octrees and space filling curves algorithms for adaptive mesh refinement are being planned.

Clone the repository and its submodules. MARS relies on googletest and google/benchmark.

git clone --recurse-submodules https://bitbucket.org/zulianp/mars.git or for older git versions

git clone https://bitbucket.org/zulianp/mars.git && cd mars && git submodule update --init --recursive

Compiling M.A.R.S for serial usage:

- cd mars/
- mkdir build
- cd build
- cmake ..
- make

Mars depends on both Kokkos and Kokkos Kernels libraries.

It will automatically find Kokkos if installed into your system. It can work with kokkos standalone or with kokkos from the Trilinos library.

Mars looks for KOKKOS_DIR or TRILINOS_DIR into the environment variables. When using Trilinos it will find them from Trilinos in $TRILINOS_DIR otherwise it will look for kokkos and kokkos kernels installations at $KOKKOS_DIR.

Use -DMARS_ENABLE_KOKKOS=ON to use the feature. For more details check CMakeLists.txt.

The default when compiling MARS with Kokkos without specifing any other CMAKE flag is the Kokkos/OpenMP execution space. Kokkos should also be compiled with OpenMP support. Otherwise the default is the serial execution space.

To compile for CUDA the Cmake flag needs to be set: MARS_ENABLE_CUDA=ON. An example would be:

cmake -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_BUILD_TYPE=Release -DMARS_ENABLE_KOKKOS=ON -DMARS_ENABLE_CUDA=ON ..

If compiled for CUDA then Kokkos should also be compiled with CUDA (Kokkos_ENABLE_CUDA=ON) and CUDA_LAMBDA (Kokkos_ENABLE_CUDA_LAMBDA=ON) support.

Zulian Patrick, Ganellari Daniel and Ramelli Dylan.

The software is realized with NO WARRANTY and it is licenzed under BSD 3-Clause license

Copyright (c) 2015 Institute of Computational Science - USI Università della Svizzera Italiana, ETH-Z Eidgenössische Technische Hochschule Zürich

If you use MARS CPU please use the following bibliographic entry

#!bibtex

@misc{marscpu,
    author = {Zulian, Patrick and Ganellari, Daniel and Rovi, Gabriele and Ramelli, Dylan},
    title = {{MARS} - {M}esh {A}daptive {R}efinement for {S}upercomputing. {G}it repository},
    url = {https://bitbucket.org/zulianp/mars},
    year = {2018}
}

If you use MARS GPU please use the following bibliographic entry

#!bibtex

@misc{marsgpu,
    author = {Ganellari, Daniel and Zulian, Patrick and Rovi, Gabriele and Ramelli, Dylan},
    title = {{MARS} - {M}esh {A}daptive {R}efinement for {S}upercomputing. {G}it repository},
    url = {https://bitbucket.org/zulianp/mars},
    year = {2018}
}