An Evaluation of the ORNL Cray XT3

Alam, Sadaf R; Kuehn, Jeffery A; Roth, Philip C; Barrett, Richard F; Messer, Bronson; Vetter, Jeffrey S; Fahey, Mark R; Mills, Richard T; Worley, Patrick H

doi:10.1177/1094342007085019

An Evaluation of the ORNL Cray XT3

Journal Article · Mon Dec 31 23:00:00 EST 2007 · International Journal of High Performance Computing Applications

DOI:https://doi.org/10.1177/1094342007085019· OSTI ID:936533

Alam, Sadaf R ^[1]; Kuehn, Jeffery A ^[1]; Roth, Philip C ^[1]; Barrett, Richard F ^[1]; Messer, Bronson ^[1]; Vetter, Jeffrey S ^[1]; Fahey, Mark R ^[1]; Mills, Richard T ^[1]; Worley, Patrick H ^[1]

ORNL

In 2005, Oak Ridge National Laboratory received delivery of a 5,294 processor Cray XT3. The XT3 is Cray's third-generation massively parallel processing system. The ORNL system uses a singleprocessor node built around the AMD Opteron and uses a custom chip-called SeaStar-for interprocessor communication. The system uses a lightweight operating system called Catamount on its compute nodes. This paper provides a performance evaluation of the Cray XT3, including measurements for microbenchmark, kernel, and application benchmarks. In particular, we provide performance results for strategic Department of Energy applications areas including climate, biology, astrophysics, combustion, and fusion. Our results, on up to 4,096 processors, demonstrate that the Cray XT3 provides competitive processor performance, high interconnect bandwidth, and high parallel efficiency on a diverse application workload, typical in the DOE Office of Science.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Laboratory (ORNL); Center for Computational Sciences

Sponsoring Organization:: DOE Office of Science; SC USDOE - Office of Science (SC)

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 936533

Journal Information:: International Journal of High Performance Computing Applications, Journal Name: International Journal of High Performance Computing Applications Journal Issue: 1 Vol. 22

Country of Publication:: United States

Language:: English

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