A portable C++ library for memory and compute abstraction on multi-core CPUs and GPUs

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

We present a C++ library for transparent memory and compute abstraction across CPU and GPU architectures. Our library combines generic data structures like vectors, multi-dimensional arrays, maps, graphs, and sparse grids with basic generic algorithms like arbitrary-dimensional convolutions, copying, merging, sorting, prefix sum, reductions, neighbor search, and filtering. The memory layout of the data structures is adapted at compile time using C++ tuples with optional memory double-mapping between host and device and the capability of using memory managed by external libraries with no data copying. We combine this transparent memory layout with generic thread-parallel algorithms under two alternative common interfaces: a CUDA-like kernel interface and a lambda-function interface. We quantify the memory and compute performance and portability of our implementation using micro-benchmarks, showing that the abstractions introduce negligible performance overhead, and we compare performance against the current state of the art in a real-world scientific application from computational fluid mechanics.

Details

OriginalspracheEnglisch
Aufsatznummere7870
FachzeitschriftConcurrency and Computation: Practice and Experience
Jahrgang35
Ausgabenummer25
PublikationsstatusVeröffentlicht - 15 Nov. 2023
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0003-4414-4340/work/159608268

Schlagworte

Schlagwörter

  • C++ tuples, generic algorithms, GPU, memory layout, multi-core, performance portability

Bibliotheksschlagworte