SC is the International Conference for
 High Performnance Computing, Networking, Storage and Analysis

SCHEDULE: NOV 13-19, 2010

From Red Storm to Cielo: Performance Analysis of ASC Simulation Programs across an Evolution of Multicore Architectures

SESSION: Research Poster Reception

EVENT TYPE: Poster

TIME: 5:15PM - 7:00PM

AUTHOR(S):Courtenay T. Vaughan, Mahesh Rajan, Douglas W. Doerfler, Richard F. Barrett

ROOM:Main Lobby

ABSTRACT:
As the number of processor cores per node increases with multi-core and multi-socket nodes, what are the effects on large-scale scientific application performance? Cielo is the Advanced Simulation and Computing (ASC) program’s newest capability machine. Rated at 1.37 PFLOPS, with dual-socket oct-core nodes linked using Cray’s Gemini interconnect, Cielo represents the latest evolution in multicore-based HPC architectures. We quantify its performance using a suite of applications representing a broad set of requirements of the ASC Tri-lab organizations (Lawrence Livermore, Los Alamos, and Sandia National Laboratories), which are being used for machine acceptance, by comparing with data from its evolutionary ancestors, from dual- to quad- to hex-core. We are finding that improvements to the Cielo node memory architecture reverse the performance degradations. Further, three of the applications are more dependent upon inter-node performance, and thus the change from SeaStar to the Gemini interconnect is being examined.

Chair/Author Details:

Courtenay T. Vaughan - Sandia National Laboratories

Mahesh Rajan - Sandia National Laboratories

Douglas W. Doerfler - Sandia National Laboratories

Richard F. Barrett - Sandia National Laboratories

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