Toward performance models of MPI implementations for understanding application scaling issues
EuroMPI'10 Proceedings of the 17th European MPI users' group meeting conference on Recent advances in the message passing interface
Predictive analysis of a hydrodynamics application on large-scale CMP clusters
Computer Science - Research and Development
Characterization and modeling of PIDX parallel I/O for performance optimization
SC '13 Proceedings of the International Conference on High Performance Computing, Networking, Storage and Analysis
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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.