Sustainable Development of Stencil-based HPC Applications - JuliaCon 2024

Explore a successful approach for sustainable development of stencil-based High Performance Computing (HPC) applications in this JuliaCon 2024 conference talk. Learn how the three "P"s - Performance, Portability, and Productivity - are addressed through the implementation of HPC building blocks using Julia packages ParallelStencil.jl, ImplicitGlobalGrid.jl, and CellArrays.jl. Discover how numerical algorithms can be formulated with architecture-agnostic, math-close code, leading to productivity similar to classical prototyping environments. Understand how these HPC building blocks transform codes into massively scalable high-performance multi-GPU/CPU applications or frameworks. Gain insights into automatic performance optimization, parallelization, optimized memory layouts, and GPU-aware distributed parallelization. Examine the extensibility of math-close notation, integration with the Julia ecosystem, and compatibility with Julia's extension feature. Review performance and scaling benchmarks from real-world applications on leading supercomputers, demonstrating near-optimal performance and scaling on thousands of GPUs.