Shared Memory Pipelined Parareal

Abstract

For the parallel-in-time integration method Parareal, pipelining can be used to hide some of the cost of the serial correction step and improve its efficiency. The paper introduces a basic OpenMP implementation of pipelined Parareal and compares it to a standard MPI-based variant. Both versions yield almost identical runtimes, but, depending on the compiler, the OpenMP variant consumes about 7% less energy and has a significantly smaller memory footprint. However, its higher implementation complexity might make it difficult to use in legacy codes and in combination with spatial parallelisation.

References in corpus (2)

• A stencil-based implementation of Parareal in the C++ domain specific embedded language STELLA
• Shared Memory Pipelined Parareal

Cited by in corpus (4)

• Combining Coarse and Fine Physics for Manipulation using Parallel-in-Time Integration
• Parareal with a physics-informed neural network as coarse propagator
• Shared Memory Pipelined Parareal
• Space-time parallel scaling of Parareal with a physics-informed Fourier Neural Operator coarse propagator applied to the Black-Scholes equation