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Title: Comparison of Cray XT3 and XT4 Scalability

Abstract

The Cray XT3 and XT4 have similar architectures, differing primarily in memory performance and in bandwidth between the node and interconnect. This paper evaluates and compares the scalability of the XT3 and XT4. Kernel benchmarks are used to verify and to quantify the performance differences between the systems. Application benchmarks are used to examine the impact of these differences on scalability. Both kernel and application benchmarks are used to identify how to use the systems most efficiently.

Authors:
 [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Computational Sciences
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
958788
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: CUG 2007, Seattle, WA, USA, 20070507, 20070510
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICAL METHODS AND COMPUTING; BENCHMARKS; KERNELS; PERFORMANCE; CRAY COMPUTERS; computer system performance; performance scalability; climate application codes

Citation Formats

Worley, Patrick H. Comparison of Cray XT3 and XT4 Scalability. United States: N. p., 2007. Web.
Worley, Patrick H. Comparison of Cray XT3 and XT4 Scalability. United States.
Worley, Patrick H. Mon . "Comparison of Cray XT3 and XT4 Scalability". United States. doi:.
@article{osti_958788,
title = {Comparison of Cray XT3 and XT4 Scalability},
author = {Worley, Patrick H},
abstractNote = {The Cray XT3 and XT4 have similar architectures, differing primarily in memory performance and in bandwidth between the node and interconnect. This paper evaluates and compares the scalability of the XT3 and XT4. Kernel benchmarks are used to verify and to quantify the performance differences between the systems. Application benchmarks are used to examine the impact of these differences on scalability. Both kernel and application benchmarks are used to identify how to use the systems most efficiently.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
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  • This paper will present an overview of the current status of I/O on the Cray XT line of supercomputers and provide guidance to application developers and users for achieving efficient I/O. A large amount of I/O benchmark results will be presented, motivated by projected I/O requirements for some widely-used scientific applications in the DOE. Finally, the authors will interpret and summarize these benchmark results to give forward-looking guidance for I/O in large-scale application runs on a Cray XT3/XT4.
  • Abstract not provided.
  • The Resource Allocation and Tracking System (RATS) is a suite of software components designed to provide resource management capabilities for high performance computing environments. RATS is currently supporting resource allocation management on the Cray X1E, XT3 and XD1 platforms at Oak Ridge National Laboratory. In this paper, the design and implementation of RATS is given with respect to the Cray platforms with an emphasis on the flexibility of the design. Future directions will also be explored.
  • Abstract not provided.
  • In the proceedings of CUG2006 we published a paper evaluating the performance of the HPCC benchmark suite on the Cray XT3, jaguar, and newly-upgraded Cray X1E, phoenix supercomputers at the Center for Computation Sciences (CCS) at Oak Ridge National Laboratory (ORNL). Although phoenix has remained unchanged since this paper was published, jaguar has undergone significant changes. It has been upgraded from a single-core XT3 system to a combined dual-core XT3 and XT4 system. This paper revisits HPCC on jaguar and discusses the effect that the past year's system upgrades have had on overall performance.