1. ExaNBody: Framework for N-Body Simulations on HPC Platforms

This framework, developed at the French Atomic Agency (CEA), is tailored for N-Body simulations on High-Performance Computing (HPC) platforms. Originally designed for the ExaSTAMP Molecular Dynamics code, it has been extended to cater to various N-Body problems.

Key Characteristics:

• Language: Implemented in C++17, leveraging modern language features for efficiency and versatility.

• Parallelization:: Hybrid approach integrating:

  • Vectorization for CPU optimization.

  • Thread-parallelization using OpenMP for multi-core architectures.

  • GPU-parallelization via CUDA to harness GPU computational power.

  • MPI-parallelization for distributed memory systems.

• Spatial Domain Decomposition: Utilizes spatial domain decomposition techniques for efficient workload distribution among processors.

• Load Balancing (RCB): Implements Load Balancing using Recursive Coordinate Bisection (RCB) for optimal task distribution among processing units.

• Parallel IO: Enables efficient handling of parallel Input/Output operations. Supports checkpoint files, parallel Paraview files, and diagnostics in a parallelized manner.

• In-situ Analysis: Provides real-time data analysis capabilities during simulation execution, minimizing data movement and storage overhead.