SGL: towards a bridging model for heterogeneous hierarchical platforms

  • Authors:
  • Chong Li;Gaé/tan Hains

  • Affiliations:
  • Laboratoire d'/Algorithmique, Complexité/ et Logique, Université/ Paris-Est, 61, Avenue du Gé/né/ral de Gaulle, 94010 Cré/teil, France/ EXQIM S.A.S., 24, rue de Caumartin, 7 ...;Laboratoire d'/Algorithmique, Complexité/ et Logique, Université/ Paris-Est, 61, Avenue du Gé/né/ral de Gaulle, 94010 Cré/teil, France/ EXQIM S.A.S., 24, rue de Caumartin, 7 ...

  • Venue:
  • International Journal of High Performance Computing and Networking
  • Year:
  • 2012

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Abstract

This paper introduces the Scatter-Gather parallel-programming and parallel execution model in the form of a simple imperative Scatter-Gather Language (SGL). Its design is based on past experience with bulk-synchronous parallel (BSP) programming and BSP language design. SGL's novel features are motivated by the last decade's move towards multi-level and heterogeneous parallel architectures involving multi-core processors, graphics accelerators and hierarchical routing networks in the largest multiprocessing systems. The design of SGL is coherent with L. Valiant's multi-BSP while offering a programming interface that is even simpler than the primitives of bulk-synchronous parallel ML (BSML). SGL appears to cover a large subset of all BSP algorithms while avoiding complex message-passing programming. Like all BSP-inspired systems, it supports predictable, portable and scalable performance. Moreover, SGL's explicit data distribution will allow automatic or programmable load-balancing.