NDLI: A (Radical) Proposal Addressing the Non-scalability of the Irregular MPI Collective Interfaces

Content Provider	IEEE Xplore Digital Library
Author	Traff, J.L.
Copyright Year	2011
Abstract	In both the regular and the irregular MPI collectives there is a correspondence between the argument lists and certain MPI derived data types. As a means to address and alleviate well-known memory and performance scalability problems in the emph{irregular} (or emph{vector}) collective interface definitions of MPI we propose to push this correspondence to its natural limit, and replace the interfaces of the MPI collectives with a new set of interfaces that specify all data sizes and displacements solely by means of derived data types. This reduces the number of collective (communication and reduction) interfaces from 16 to 10 (in the extreme to only 7), significantly generalizes the operations, unifies regular and irregular collective interfaces, makes it possible to decouple certain algorithmic decisions from the collective operation, and moves the interface scalability issue from the collective interfaces to the MPI derived data types. To complete the proposal we discuss the memory scalability of the derived data types and suggest a number of new data types for MPI, some of which may be of independent interest. Finally, we introduce additional, new functionality for scalable construction of data types as needed for the new collective interfaces. We give examples throughout of the benefits of this alternative set of collective interfaces. It is argued that an implementation can straightforwardly be undertaken within any reasonable MPI implementation.
Starting Page	1199
Ending Page	1207
File Size	740705
Page Count	9
File Format	PDF
ISBN	9781612844251
ISSN	15302075
DOI	10.1109/IPDPS.2011.264
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Limiting Scalability Tiles Layout Semantics Proposals Indexes
Content Type	Text
Resource Type	Article

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