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Fine-Grained Analysis of Communication Similarity between Real and Proxy Applications

Proceedings of PMBS 2019: Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems - Held in conjunction with SC 2019: The International Conference for High Performance Computing, Networking, Storage and Analysis

Aaziz, Omar R.; Vaughan, Courtenay T.; Cook, Jonathan E.; Cook, Jeanine C.; Kuehn, Jeffery; Richards, David

In this work we investigate the dynamic communication behavior of parent and proxy applications, and investigate whether or not the dynamic communication behavior of the proxy matches that of its respective parent application. The idea of proxy applications is that they should match their parent well, and should exercise the hardware and perform similarly, so that from them lessons can be learned about how the HPC system and the application can best be utilized. We show here that some proxy/parent pairs do not need the extra detail of dynamic behavior analysis, while others can benefit from it, and through this we also identified a parent/proxy mismatch and improved the proxy application.

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TYPE Conference Poster YEAR 2019
OSTIScopus

Fast and Robust Linear Solvers based on Hierarchical Matrices (LDRD Final Report)

Boman, Erik G.; Darve, Eric; Lehoucq, Richard B.; Rajamanickam, Sivasankaran R.; Tuminaro, Raymond S.; Yamazaki, Ichitaro Y.

This report is the final report for the LDRD project "Fast and Robust Linear Solvers using Hierarchical Matrices". The project was a success. We developed two novel algorithms for solving sparse linear systems. We demonstrated their effectiveness on ill-conditioned linear systems from ice sheet simulations. We showed that in many cases, we can obtain near-linear scaling. We believe this approach has strong potential for difficult linear systems and should be considered for other Sandia and DOE applications. We also report on some related research activities in dense solvers and randomized linear algebra.

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TYPE Other Report YEAR 2019
DOIOSTI
Results 1726–1750 of 9,998
Results 1726–1750 of 9,998