Performance analysis of a 3D unstructured mesh hydrodynamics code on multi‐core and many‐core architectures

Performance analysis of a 3D unstructured mesh hydrodynamics code on multi- and many-core architectures

Several next generation high performance computing platforms are or will be based on the so-called many-core architectures, which represent a significant departure from commodity multi-core architectures. A key issue in transitioning large-scale simulation codes from multi-core to many-core systems is closing the serial performance gap, that is, overcoming the large difference in single-core pe...

Comparative Performance Analysis of Coarse Solvers for Algebraic Multigrid on Multicore and Manycore Architectures

We study the performance of a two-level algebraic-multigrid algorithm, with a focus on the impact of the coarse-grid solver on performance. We consider two algorithms for solving the coarse-space systems: the preconditioned conjugate gradient method and a new robust HSSembedded low-rank sparse-factorization algorithm. Our test data comes from the SPE Comparative Solution Project for oil-reservo...

Self-adaptive Multiprecision Preconditioners on Multicore and Manycore Architectures

Based on the premise that preconditioners needed for scientific computing are not only required to be robust in the numerical sense, but also scalable for up to thousands of light-weight cores, we argue that this two-fold goal is achieved for the recently developed self-adaptive multi-elimination preconditioner. For this purpose, we revise the underlying idea and analyze the performance of impl...

A Reactive Unobtrusive Prefetcher for Multicore and Manycore Architectures

Processor performance continues to out pace memory performance by a large margin. The growing popularity of multicore and manycore architectures further exacerbates this problem. The challenge of keeping the processor(s) fed with data becomes more difficult. One approach for mitigating this gap is to employ software-based speculative prefetching. Software dynamic prefetchers are able to identif...

Improving Unstructured Mesh Application Performance on Stream Architectures