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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Performance Patterns and Hardware Metrics on Modern Multicore Processors: Best Practices for Performance Engineering
verfasst von : Jan Treibig, Georg Hager, Gerhard Wellein
Erschienen in: Euro-Par 2012: Parallel Processing Workshops
Verlag: Springer Berlin Heidelberg
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Many tools and libraries employ hardware performance monitoring (HPM) on modern processors, and using this data for performance assessment and as a starting point for code optimizations is very popular. However, such data is only useful if it is interpreted with care, and if the right metrics are chosen for the right purpose. We demonstrate the sensible use of hardware performance counters in the context of a structured performance engineering approach for applications in computational science. Typical performance patterns and their respective metric signatures are defined, and some of them are illustrated using case studies. Although these generic concepts do not depend on specific tools or environments, we restrict ourselves to modern x86-based multicore processors and use the likwid-perfctr tool under the Linux OS.