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Interoperability strategies for GASPI and MPI in large-scale scientific applications
T Syst Solut Res, Stuttgart, Germany..
KTH, School of Electrical Engineering and Computer Science (EECS), Computational Science and Technology (CST).ORCID iD: 0000-0003-2414-700X
Univ Edinburgh, EPCC, Edinburgh, Midlothian, Scotland..
KTH, School of Electrical Engineering and Computer Science (EECS), Computational Science and Technology (CST).ORCID iD: 0000-0003-1603-5294
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2019 (English)In: The international journal of high performance computing applications, ISSN 1094-3420, E-ISSN 1741-2846, Vol. 33, no 3, p. 554-568Article in journal (Refereed) Published
Abstract [en]

One of the main hurdles of partitioned global address space (PGAS) approaches is the dominance of message passing interface (MPI), which as a de facto standard appears in the code basis of many applications. To take advantage of the PGAS APIs like global address space programming interface (GASPI) without a major change in the code basis, interoperability between MPI and PGAS approaches needs to be ensured. In this article, we consider an interoperable GASPI/MPI implementation for the communication/performance crucial parts of the Ludwig and iPIC3D applications. To address the discovered performance limitations, we develop a novel strategy for significantly improved performance and interoperability between both APIs by leveraging GASPI shared windows and shared notifications. First results with a corresponding implementation in the MiniGhost proxy application and the Allreduce collective operation demonstrate the viability of this approach.

Place, publisher, year, edition, pages
SAGE PUBLICATIONS LTD , 2019. Vol. 33, no 3, p. 554-568
Keywords [en]
Interoperability, GASPI, MPI, iPIC3D, Ludwig, MiniGhost, halo exchange, Allreduce
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:kth:diva-254034DOI: 10.1177/1094342018808359ISI: 000468919900011Scopus ID: 2-s2.0-85059353725OAI: oai:DiVA.org:kth-254034DiVA, id: diva2:1342782
Note

QC 20190814

Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

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Iakymchuk, RomanAkhmetova, DanaLaure, ErwinMarkidis, Stefano

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  • apa
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