A uGNI-based MPICH2 nemesis network module for the cray XE

Authors:
Howard Pritchard;Igor Gorodetsky;Darius Buntinas
Affiliations:
Cray Inc.;Cray Inc.;Argonne National Laboratory
Venue:
EuroMPI'11 Proceedings of the 18th European MPI Users' Group conference on Recent advances in the message passing interface
Year:
2011

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Abstract

Recent versions of MPICH2 have featured Nemesis - a scalable, highperformance, multi-network communication subsystem. Nemesis provides a framework for developing NetworkModules (Netmods) for interfacing the Nemesis subsystem to various high speed network protocols. Cray has developed a user-level Generic Network Interface (uGNI) for interfacing MPI implementations to the internal high speed network of Cray XE and follow-on computer systems. This paper describes the design of a uGNI Netmod for the MPICH2 nemesis subsystem. MPICH2 performance data on the Cray XE are presented.