Scalable performance analysis of large-scale parallel applications on Cray XT systems with Scalasca
Brian J. N. Wylie, Daniel F Becker, David Böhme, Felix Wolf, Marc-André Hermanns, Bernd W. Mohr, Markus Geimer, Wolfgang Frings, Zoltán Szebenyi · JuSER (Forschungszentrum Jülich) · 2010
ABSTRACT: The open-source Scalasca toolset (available from www.scalasca.org) supports integrated runtime summarization and automated trace analysis on a diverse range of HPC computer systems. An HPC-Europa2 visit to EPCC in 2009 resulted in significantly enhanced support for Cray XT systems, particularly the auxilliary programming environments and hybrid OpenMP/MPI. Combined with its previously demonstrated extreme scalability and portable performance analyses comparison capabilities, Scalasca has been used to analyse and tune numerous key applications (and benchmarks) on Cray XT and other PRACE prototype systems, from which experience with a representative selection is reviewed. KEYWORDS: OpenMP/MPI, parallel/distributed systems, performance measurement and analysis tools, scalability 1