Designing a portable MPI-2 over modern interconnects using uDAPL interface

  • Authors:

  • L. Chai;R. Noronha;P. Gupta;G. Brown;D. K. Panda

  • Affiliations:

  • Department of Computer Science and Engineering, The Ohio State University;Department of Computer Science and Engineering, The Ohio State University;Department of Computer Science and Engineering, The Ohio State University;Department of Computer Science and Engineering, The Ohio State University;Department of Computer Science and Engineering, The Ohio State University

  • Venue:
  • PVM/MPI'05 Proceedings of the 12th European PVM/MPI users' group conference on Recent Advances in Parallel Virtual Machine and Message Passing Interface
  • Year:
  • 2005

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Abstract

In the high performance computing arena, there exist several implementations of MPI-1 and MPI-2 for different networks. Some implementations allow the developer to work with multiple networks. However, most of them require the implementation of a new device, before they can be deployed on a new networking interconnect. The emerging uDAPL interface provides a network-independent interface to the native transport of different networks. Designing a portable MPI library with uDAPL might allow the user to move quickly from one networking technology to another. In this paper, we have designed the popular MVAPICH2 library to use uDAPL for communication operations. To the best of our knowledge, this is the first open-source MPI-2 compliant implementation over uDAPL. Evaluation with micro-benchmarks and applications on InfiniBand shows that the implementation with uDAPL performs comparably with that of MVAPICH2. Evaluation with micro-benchmarks on Myrinet and Gigabit Ethernet shows that the implementation with uDAPL delivers performance close to that of the underlying uDAPL library.