Publication Type
Conference Paper
Publication Date
Conference Name
48th Cray User Group Conference
Conference Location
Lugano, Switzerland
Conference Date
-
Abstract
The Community Atmosphere Model (CAM) is the atmospheric component of the Community Climate System Model (CCSM) and is the primary consumer of computer resources in typical CCSM simulations. We analyze the performance of CAM on the Cray XT3 and Cray X1E systems at Oak Ridge National Laboratory, describing the performance sensitivities of the two systems to the numerous tuning options available in CAM. We then compare performance on the Cray systems with that on a number of other systems, including the Earth Simulator, an IBM POWER4 cluster, and an IBM POWER5 cluster.