Data Centers

Design and Evaluation of Generalized Collective Communication Primitives With Overlap Using ConnectX-2 Offload Engine

Download Now Free registration required

Executive Summary

Collective communication operations provided by the Message Passing Interface (MPI) are heavily used by scientific applications at large scale. The current MPI standard, MPI-2.2, only defines blocking collective communication calls and it is expected that MPI-3 will allow for non-blocking collective communication. While it is possible to allow simultaneous computation and communication through thread-based designs, resource sharing across the threads is always a concern. The newly introduced ConnectX-2 InfiniBand adapter from Mellanox features an offload mechanism that enables the Network Interface Card (NIC) to perform a series of communication and reduction operations without the involvement of the host processor.

  • Format: PDF
  • Size: 389.6 KB