Hybrid programming using OpenSHMEM and OpenACC

Matthew Baker, Swaroop Pophale, Jean Charles Vasnier, Haoqiang Jin, Oscar Hernandez

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

With high performance systems exploiting multicore and accelerator-based architectures on a distributed shared memory system, heterogenous hybrid programming models are the natural choice to exploit all the hardware made available on these systems. Previous efforts looking into hybrid models have primarily focused on using OpenMP directives (for shared memory programming) with MPI (for inter-node programming on a cluster), using OpenMP to spawn threads on a node and communication libraries like MPI to communicate across nodes. As accelerators get added into the mix, and there is better hardware support for PGAS languages/APIs, this means that new and unexplored heterogenous hybrid models will be needed to effectively leverage the new hardware. In this paper we explore the use of OpenACC directives to program GPUs and the use of OpenSHMEM, a PGAS library for onesided communication between nodes. We use the NAS-BT Multi-zone benchmark that was converted to use the OpenSHMEM library API for network communication between nodes and OpenACC to exploit accelerators that are present within a node. We evaluate the performance of the benchmark and discuss our experiences during the development of the OpenSHMEM+OpenACC hybrid program.

Original languageEnglish
Title of host publicationOpenSHMEM and Related Technologies
Subtitle of host publicationExperiences, Implementations, and Tools - First Workshop, OpenSHMEM 2014, Proceedings
PublisherSpringer Verlag
Pages74-89
Number of pages16
ISBN (Print)9783319052144
DOIs
StatePublished - 2014
Event1st Workshop on OpenSHMEM and Related Technologies: Experiences, Implementations, and Tools, OpenSHMEM 2014 - Annapolis, MD, United States
Duration: Mar 4 2014Mar 6 2014

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume8356 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference1st Workshop on OpenSHMEM and Related Technologies: Experiences, Implementations, and Tools, OpenSHMEM 2014
Country/TerritoryUnited States
CityAnnapolis, MD
Period03/4/1403/6/14

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