Estimating application hierarchical bandwidth requirements using BSP family models

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There has been a vast amount of work to develop programming models that provide good performance across machine architectures, are easy to use, and have predictable performance. Similarly, the design and optimization of architectures to achieve optimal performance for an application class remains a challenging task. Accurate cost modeling is essential for both application development and system design. Many scientific computing codes are developed by using libraries that provide custom-built collective communication primitives. For example, the family of Bulk Synchronous Parallel (BSP) machine models provides suitable tools for analyzing such problems. However, modeling the effect of bandwidth limitations for globally unbalanced communication and estimating the hierarchical bandwidth used by applications remain key challenges. We present a hierarchical bandwidth machine model (alpha DBSP) that naturally extends the Decomposable BSP (DBSP) model by associating a bandwidth growth factor alpha to each message pattern. Algorithms executed on alpha DBSP have a runtime that is at least as good as DBSP. Hence, there are globally unbalanced problems for which alpha DBSP analysis is simpler or more accurate We present three scientific computing kernels that illustrate the differences between alpha DBSP and DBSP analysis. Similar to the BSP family models, alpha DBSP predicts collective communication execution time for a given machine. Additionally, alpha DBSP estimates the hierarchical bandwidth required by a given application. System architects may use this estimation to design machines that avoid bandwidth bottlenecks for their target application class.

Original languageEnglish (US)
Title of host publicationProceedings of the 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012
Pages914-923
Number of pages10
DOIs
StatePublished - Oct 18 2012
Event2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012 - Shanghai, China
Duration: May 21 2012May 25 2012

Publication series

NameProceedings of the 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012

Other

Other2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012
CountryChina
CityShanghai
Period5/21/125/25/12

All Science Journal Classification (ASJC) codes

  • Software

Keywords

  • BSP
  • Collective Communication
  • DBSP
  • Interconnect Topology
  • Performance Modeling

Cite this

Singh, J. P. (2012). Estimating application hierarchical bandwidth requirements using BSP family models. In Proceedings of the 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012 (pp. 914-923). [6270736] (Proceedings of the 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012). https://doi.org/10.1109/IPDPSW.2012.112