NDLI: Predictive analysis of a wavefront application using LogGP

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Predictive analysis of a wavefront application using LogGP

Content Provider	ACM Digital Library
Author	Sundaram-Stukel, David Vernon, Mary K.
Abstract	This paper develops a highly accurate LogGP model of a complex wavefront application that uses MPI communication on the IBM SP/2. Key features of the model include: (1) elucidation of the principal wavefront synchronization structure, and (2) explicit high-fidelity models of the MPI-send and MPI-receive primitives. The MPI-send/receive models are used to derive L, o, and G from simple two-node micro-benchmarks. Other model parameters are obtained by measuring small application problem sizes on four SP nodes. Results show that the LogGP model predicts, in seconds and with a high degree of accuracy, measured application execution time for large problems running on 128 nodes. Detailed performance projections are provided for very large future processor configurations that are expected to be available to the application developers. These results indicate that scaling beyond one or two thousand nodes yields greatly diminished improvements in execution time, and that synchronization delays are a principal factor limiting the scalability of the application.
Starting Page	141
Ending Page	150
Page Count	10
File Format	PDF
ISBN	1581131003
DOI	10.1145/301104.301117
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1999-05-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Parallel application performance Parallel algorithms Logp model Particle transport applications
Content Type	Text
Resource Type	Article

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