Title :
Performance modeling in action: Performance prediction of a Cray XT4 system during upgrade
Author :
Barker, Kevin J. ; Davis, Kei ; Kerbyson, Darren J.
Author_Institution :
Performance & Archit. Lab. (PAL), Los Alamos Nat. Lab., Los Alamos, NM, USA
Abstract :
We present predictive performance models of two of the petascale applications, S3D and GTC, from the DOE Office of Science workload. We outline the development of these models and demonstrate their validation on an Opteron/Infiniband cluster and the pre-upgrade ORNL Jaguar system (Cray XT3/XT4). Given the high accuracy of the full application models, we predict the performance of the Jaguar system after the upgrade of its nodes, and subsequently compare this to the actual performance of the upgraded system. We then analyze the performance of the system based on the models to quantify bottlenecks and potential optimizations. Finally, the models are used to quantify the benefits of alternative node allocation strategies.
Keywords :
Cray computers; computer network performance evaluation; parallel machines; workstation clusters; Cray XT3 system; Cray XT4 system; DOE; GTC; Office of Science; Opteron-Infiniband cluster; S3D; node allocation strategies; petascale applications; predictive performance models; preupgrade ORNL Jaguar system; Delay; Hardware; Laboratories; Measurement; Network topology; Performance analysis; Performance evaluation; Predictive models; Routing; US Department of Energy;
Conference_Titel :
Parallel & Distributed Processing, 2009. IPDPS 2009. IEEE International Symposium on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3751-1
Electronic_ISBN :
1530-2075
DOI :
10.1109/IPDPS.2009.5161098
