SCHEDULE: NOV 15-20, 2015

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Simulating and Visualizing Traffic on the Dragonfly Network

SESSION: Regular & ACM Student Research Competition Poster Reception

EVENT TYPE: Posters, Receptions, ACM Student Research Competition

EVENT TAG(S): HPC Beginner Friendly, Regular Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR(S): Michela Becchi, Manish Parashar, Dorian C. Arnold

AUTHOR(S):Abhinav Bhatele, Nikhil Jain, Yarden Livnat, Valerio Pascucci, Peer-Timo Bremer

ROOM:Level 4 - Lobby

ABSTRACT:

The dragonfly topology is becoming a popular choice for building high-radix, low-diameter networks with high-bandwidth links. Even with a powerful network, preliminary experiments on Edison at NERSC have shown that for communication-heavy applications, inter-job interference and thus presumably job placement remains an important factor. In this poster, we explore the effects of job placement, parallel workloads and network configurations on network throughput to better understand inter-job interference. We use a simulation tool called Damselfly to model the network behavior of Edison and study the impact of various system parameters on network throughput. Parallel workloads based on five representative communication patterns are used and the simulation studies on up to 131,072 cores are aided by a new visualization of the dragonfly network.

Chair/Author Details:

Michela Becchi, Manish Parashar, Dorian C. Arnold (Chair) - University of Missouri|Rutgers University|University of New Mexico|

Abhinav Bhatele - Lawrence Livermore National Laboratory

Nikhil Jain - University of Illinois at Urbana-Champaign

Yarden Livnat - University of Utah

Valerio Pascucci - University of Utah

Peer-Timo Bremer - Lawrence Livermore National Laboratory

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