Seminars & Events

Mathematics and Computer Science Division Seminar
"The Design and Implementation of Open-MX"

DATE: December 10, 2008
TIME: 10:30 am
SPEAKER: Brice Goglin, Institut National de Recherche en Informatique et en Automatique
LOCATION: Building 221, Room A216, Argonne National Laboratory
HOST: Dave Goodell

Description:
Open-MX is a message passing stack that offers the Myrinet Express features on top of regular Ethernet hardware. We will see what problems one can encounter when trying to mimic high-speed network capabilities without having advanced hardware support underneath. Several solutions based on I/OAT copy offload, interrupt affinities, and multiqueue support will be discussed. Finally, we will see how working on intra-node communication in Open-MX lead to designing the knem kernel module which aims at improving large message performance in MPICH2/Nemesis.

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