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\iteman{io-port 05978108}
\itemau{Geimer, Markus; Hermanns, Marc-Andr\'e; Siebert, Christan; Wolf, Felix; Wylie, Brian J.N.}
\itemti{Scaling performance tool MPI communicator management.}
\itemso{Cotronis, Yiannis (ed.) et al., Recent advances in the message passing interface. 18th European MPI users' group meeting, EuroMPI 2011, Santorini, Greece, September 18--21, 2011. Proceedings. Berlin: Springer (ISBN 978-3-642-24448-3/pbk). Lecture Notes in Computer Science 6960, 178-187 (2011).}
\itemab
Summary: The Scalasca toolset has successfully demonstrated measurement and analysis scalability on the largest computer systems, however, applications have growing complexity and increasing demands on performance tools. One such application is the PFLOTRAN code for simulating multiphase subsurface flow and reactive transport. While PFLOTRAN itself and Scalasca runtime summarization both scale well, MPI communicator management becomes critical for trace collection with tens of thousands of processes. Re-design and re-engineering of key components of the Scalasca measurement system are presented which encompass the representation of communicators, communicator definition tracking and unification, and translation of ranks recorded in event traces.
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\itemut{MPI communicators; performance measurement tools; scalability}
\itemli{doi:10.1007/978-3-642-24449-0\_21}
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