NDLI: Multipath Load Balancing for M × N Communication Patterns on the Blue Gene/Q Supercomputer Interconnection Network

Content Provider	IEEE Xplore Digital Library
Author	Bui, H. Johnson, A. Jacob, R. Malakar, P. Leigh, J.
Copyright Year	2015
Description	Author affiliation: Dept. of Comput. Sci., Univ. of Hawaii at Manoa, Honolulu, HI, USA (Leigh, J.) \|\| Dept. of Comput. Sci., Univ. of Illinois at Chicago, Chicago, IL, USA (Bui, H.; Johnson, A.) \|\| Argonne Nat. Lab., Northern Illinois Univ., DeKalb, IL, USA (Jacob, R.; Malakar, P.)
Abstract	Achievable networking performance of applications in a supercomputer depends on the exact combination of the communication patterns of the applications and the routing algorithms used by the supercomputer. In order to achieve the highest networking performance for the applications the routing algorithms need to be designed optimally for those communication patterns. However, while communication patterns usually have a wide variation from application to application and even from phase to phase in an application, routing algorithms have a limited variation and usually are optimized for typical communication patterns. This results in high networking performance for favored communication patterns but low networking performance for others. In this paper we present approaches for improving networking performance by rebalancing load on physical links on the Blue Gene Q supercomputer. We realize our approaches in a framework called OPTIQ and demonstrate the efficacy of our framework via a set of benchmarks. Our results show that we can achieve 30% higher throughput on experiment with data and patterns from a real application. The improvement can be up to several times higher throughput than default MPI_Alltoallv used in the Blue Gene Q supercomputer for certain communication patterns.
Starting Page	833
Ending Page	840
File Size	239291
Page Count	8
File Format	PDF
ISBN	9781467365987
DOI	10.1109/CLUSTER.2015.140
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Routing Throughput Supercomputers Optimization Data transfer Load modeling Mathematical model network load balancing multi-path data movement BG/Q optimization heuristic interconnection network communication patterns
Content Type	Text
Resource Type	Article

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