Extending the MPI-2 Generalized Request Interface

  • Robert Latham
  • William Gropp
  • Robert Ross
  • Rajeev Thakur
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4757)

Abstract

The MPI-2 standard added a new feature to MPI called generalized requests. Generalized requests allow users to add new nonblocking operations to MPI while still using many pieces of MPI infrastructure such as request objects and the progress notification routines (MPI_Test, MPI_Wait). The generalized request design as it stands, however, has deficiencies regarding typical use cases. These deficiencies are particularly evident in environments that do not support threads or signals, such as the leading petascale systems (IBM Blue Gene/L, Cray XT3 and XT4). This paper examines these shortcomings, proposes extensions to the interface to overcome them, and presents implementation results.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Robert Latham
    • 1
  • William Gropp
    • 1
  • Robert Ross
    • 1
  • Rajeev Thakur
    • 1
  1. 1.Mathematics and Computer Science Division, Argonne National Laboratory, Argonne, IL 60439USA

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