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Interface to Replace PMPI
Marc-Andre Hermanns edited this page Oct 13, 2017
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While the PMPI interface has served its purpose well over the years, several drawback have led to a redesign:
- Weak symbol interception is OS dependent
- Limits interception to a single tool
- Tool is forced to be monolithic (single shared library)
A replacement interface should fulfill the following requirements
- No loss of functionality compared to existing PMPI
- Complete coverage of MPI functions (except where exempted already in MPI-3)
- Complete coverage of tool functionality (wrapping, changes to parameters, changes to routines, etc.)
- Complete coverage of language bindings (C, mpif.h, use mpi, use mpi_f08)
- Support multiple tools/libraries to attach
- Low to no overhead when no tool/library is attached
- Tools/libraries can be implemented in C (in one place) regardless of the language bindings intercepted
- Integration of MPI thread support
The current state of the discussion is kept in a slide deck.
Note: The slide deck is not designed to be read without further explanation.
- 2017-10-05: pdf | pptx
- pmpi_replacement_summary.pdf.