Performance analysis of large-scale OpenMP and hybrid MPI/OpenMP applications with VampirNG

Authors:
Holger Brunst;Bernd Mohr
Affiliations:
Center for High Performance Computing, Dresden University of Technology, Dresden, Germany;Forschungszentrum Jülich, ZAM, Jülich, Germany
Venue:
IWOMP'05/IWOMP'06 Proceedings of the 2005 and 2006 international conference on OpenMP shared memory parallel programming
Year:
2005

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Abstract

This paper presents a tool setup for comprehensive event-based performance analysis of large-scale openMP and hybrid openmp/ MPI applications. The KOJAK framework is used for portable code instrumentation and automatic analysis while the new VAMIIR NG infrastructure serves as generic visualization engine for both openMP and MPI performance properties. The tools share the same data base which enables a smooth transition from bottleneck auto-detection to manual in-depth visualization and analysis. With VAMPIR NG being a distributed data-parallel architecture, large problems on very large scale systems can be addressed.