TY  - CONF
AU  - Hermanns, Marc-André
AU  - Hjlem, Nathan T.
AU  - Knobloch, Michael
AU  - Mohror, Kathryn
AU  - Schulz, Martin
TI  - Enabling callback-driven runtime introspection via MPI_T
CY  -  New York
PB  - ACM Press
M1  - FZJ-2018-06213
SN  - 978-1-4503-6492-8
SP  - 8:1--8:10
PY  - 2018
AB  - Understanding the behavior of parallel applications that use the Message Passing Interface (MPI) is critical for optimizing communication performance. Performance tools for MPI currently rely on the PMPI Profiling Interface or the MPI Tools Information Interface, MPI_T, for portably collecting information for performance measurement and analysis. While tools using these interfaces have proven to be extremely valuable for performance tuning, these interfaces only provide synchronous information, i.e., when an MPI or an MPI_T function is called. There is currently no option for collecting information about asynchronous events from within the MPI library. In this work we propose a callback-driven interface for event notification from MPI implementations. Our approach is integrated in the existing MPI_T interface and provides a portable API for tools to discover and register for events of interest. We demonstrate the functionality and usability of the interface with a prototype implementation in Open MPI, a small logging tool (MEL) and the measurement infrastructure Score-P.
T2  - the 25th European MPI Users' Group Meeting
CY  - 23 Sep 2018 - 26 Sep 2018, Barcelona (Spain)
Y2  - 23 Sep 2018 - 26 Sep 2018
M2  - Barcelona, Spain
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
UR  - <Go to ISI:>//WOS:000629154600003
DO  - DOI:10.1145/3236367.3236370
UR  - https://juser.fz-juelich.de/record/856881
ER  -