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Erschienen in:
2015 | OriginalPaper | Buchkapitel
Studying Performance Changes with Tracking Analysis
verfasst von : Germán Llort, Harald Servat, Juan Gonzalez, Judit Gimenez, Jesús Labarta
Erschienen in: Tools for High Performance Computing 2014
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Abstract
Scientific applications can have so many parameters, possible usage scenarios and target architectures, that a single experiment is often not enough for an effective analysis that gets sound understanding of their performance behavior. Different software and hardware settings may have a strong impact on the results, but trying and measuring in detail even just a few possible combinations to decide which configuration is better, rapidly floods the user with excessive amounts of information to compare.
In this chapter we introduce a novel methodology for performance analysis based on object tracking techniques. The most compute-intensive parts of the program are automatically identified via cluster analysis, and then we track the evolution of these regions across different experiments to see how the behavior of the program changes with respect to the varying settings and over time. This methodology addresses an important problem in HPC performance analysis, where the volume of data that can be collected expands rapidly in a potentially high dimensional space of performance metrics, and we are able to manage this complexity and identify coarse properties that change when parameters are varied to target tuning and more detailed performance studies.