An Evaluation of the Oak Ridge National Laboratory Cray XT3

TitleAn Evaluation of the Oak Ridge National Laboratory Cray XT3
Publication TypeJournal Article
Year of Publication2008
AuthorsAlam, Sadaf R., Barrett Richard F., Fahey Mark R., Kuehn Jeffery A., Bronson Messer O. E., Mills Richard T., Roth Philip C., Vetter Jeffrey S., and Worley P. H.
JournalInternational Journal of High Performance Computing Applications
Volume22
Issue1
Pagination52-80
Date PublishedFebruary 1, 2008
Abstract

In 2005, Oak Ridge National Laboratory (ORNL) received delivery of a 5294 processor Cray XT3. The XT3 is Cray's third-generation massively parallel processing system. The ORNL system uses a single-processor 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 micro-benchmark, 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 4096 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.

URLhttp://hpc.sagepub.com/cgi/content/abstract/22/1/52
DOI10.1177/1094342007085019
Short TitleAn Evaluation of the Oak Ridge National Laboratory Cray XT3