Efficient Programming for Multicore Processor Heterogeneity: OpenMP versus OmpSs - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier
Conference Papers Year : 2017

Efficient Programming for Multicore Processor Heterogeneity: OpenMP versus OmpSs

Florent Bruguier
Abdoulaye Gamatié
Gilles Sassatelli

Abstract

ARM single-ISA heterogeneous multicore processors combine high-performance big cores with power-efficient small cores. They aim at achieving a suitable balance between performance and energy. How- ever, a main challenge is to program such architectures so as to efficiently exploit their features. In this paper, we study the impact on performance and energy trade-offs of single-ISA architecture according to OpenMP 3.0 and the OmpSs programming models. We consider different symmetric/asymmetric architecture configura- tions in terms of core frequency and core count between big and LITTLE clusters. Experiments are conducted on both a real Samsung Exynos 5 Octa system-on-chip and the gem5/McPAT simulation frameworks. Results show that OmpSs implementations are more sensitive to loop scheduling parameters than OpenMP 3.0. In most cases, best OmpSs configurations significantly outperform OpenMP ones. While cluster frequency asym- metry provides uninteresting results, asymmetric cluster configuration with single high-performance core and multiple low-power cores provides better performance/energy trade-offs in many cases.
Fichier principal
Vignette du fichier
opensuco17.pdf (877.75 Ko) Télécharger le fichier
Loading...

Dates and versions

lirmm-01723762 , version 1 (05-03-2018)

Identifiers

  • HAL Id : lirmm-01723762 , version 1

Cite

Anastasiia Butko, Florent Bruguier, Abdoulaye Gamatié, Gilles Sassatelli. Efficient Programming for Multicore Processor Heterogeneity: OpenMP versus OmpSs. OpenSuCo, Jun 2017, Frankfurt, Germany. ⟨lirmm-01723762⟩
290 View
251 Download

Share

More