research-article

Implementation and performance analysis of non-blocking collective operations for MPI

Authors:

Torsten Hoefler,

Andrew Lumsdaine,

Wolfgang RehmAuthors Info & Claims

SC '07: Proceedings of the 2007 ACM/IEEE conference on Supercomputing

Article No.: 52, Pages 1 - 10

https://doi.org/10.1145/1362622.1362692

Published: 10 November 2007 Publication History

Abstract

Collective operations and non-blocking point-to-point operations have always been part of MPI. Although non-blocking collective operations are an obvious extension to MPI, there have been no comprehensive studies of this functionality. In this paper we present LibNBC, a portable high-performance library for implementing non-blocking collective MPI communication operations. LibNBC provides non-blocking versions of all MPI collective operations, is layered on top of MPI-1, and is portable to nearly all parallel architectures. To measure the performance characteristics of our implementation, we also present a microbenchmark for measuring both latency and overlap of computation and communication. Experimental results demonstrate that the blocking performance of the collective operations in our library is comparable to that of collective operations in other high-performance MPI implementations. Our library introduces a very low overhead between the application and the underlying MPI and thus, in conjunction with the potential to overlap communication with computation, offers the potential for optimizing real-world applications.

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cover image ACM Conferences

SC '07: Proceedings of the 2007 ACM/IEEE conference on Supercomputing

November 2007

723 pages

ISBN:9781595937643

DOI:10.1145/1362622

General Chair:
Becky Verastegui
Oak Ridge National Laboratory

Copyright © 2007 ACM.

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Published: 10 November 2007

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https://doi.org/10.1080/10095020.2024.2313326
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