GridTools / gridtools

Libraries and utilities to develop performance portable applications for weather and climate.
https://gridtools.github.io/gridtools
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License: BSD Gitpod Ready-to-Code

The GridTools framework is a set of libraries and utilities to develop performance portable applications in the area of weather and climate. To achieve the goal of performance portability, the user-code is written in a generic form which is then optimized for a given architecture at compile-time. The core of GridTools is the stencil composition module which implements a DSL embedded in C++ for stencils and stencil-like patterns. Further, GridTools provides modules for halo exchanges, boundary conditions, data management and bindings to C and Fortran.

GridTools is successfully used to accelerate the dynamical core of the COSMO model with improved performance on CUDA-GPUs compared to the current official version, demonstrating production quality and feature-completeness of the library for models on lat-lon grids. The GridTools-based dynamical core is shipped with COSMO v5.7 and later, see release notes COSMO v5.7.

Although GridTools was developed for weather and climate applications it might be applicable for other domains with a focus on stencil-like computations.

A detailed introduction can be found in the documentation.

Installation instructions

git clone https://github.com/GridTools/gridtools.git
cd gridtools
mkdir -p build && cd build
cmake ..
make -j8
make test

For choosing the compiler, use the standard CMake techniques, e.g. setting the environment variables

CXX=`which g++` # full path to the C++ compiler
CC=`which gcc` # full path to theC compiler
FC=`which gfortran` # full path to theFortran compiler
CUDACXX=`which nvcc` # full path to NVCC
CUDAHOSTCXX=`which g++` # full path to the C++ compiler to be used as CUDA host compiler
Requirements

Supported compilers

The GridTools libraries are currently nightly tested with the following compilers on CSCS supercomputers.

Compiler Backend Tested on Comments
Cray clang version 12.0.3 all backends Piz Daint P100 GPU with Clang-CUDA
Cray clang version 10.0.2 + NVCC 11.2 all backends Piz Daint P100 GPU
Cray clang version 12.0.3 all backends Piz Daint with -std=c++20
GNU 11.2.0 + NVCC 11.0 all backends Piz Daint P100 GPU
GNU 11.2.0 + NVCC 11.2 all backends Dom P100 GPU
GNU 8.3.0 + NVCC 11.2 all backends Tsa V100 GPU
Known issues
Partly supported (expected to work, but not tested regularly)
Compiler Backend Date Comments
Intel 19.1.1.217 all backends 2021-09-30 with cmake . -DCMAKE_CXX_FLAGS=-qnextgen
NVHPC 23.3 all backends 2023-04-20 only compilation is tested regularly in CI
ROCm 6.0.3 all backends 2024-09-24 tested on AMD MI250X (LUMI)

Contributing

Contributions to the GridTools framework are welcome. Please open an issue for any bugs that you encounter or provide a fix or enhancement as a PR. External contributions to GridTools require us a signed copy of a copyright release form to ETH Zurich. We will contact you on the PR.