Dear MPI Forum,

With this proposal we want to address the current problem of not using
hardware and application topology information for communication
performance optimization.
Therefore we propose some new API functions to the existing MPI Topology 

Details of the problem can be found in issue #120 and related material therein:

The proposed changes in the standard are part of pull request #98:

An annotated pdf showing the changes in the document is available under

Best regards
Christoph Niethammer and Rolf Rabenseifner


Christoph Niethammer
High Performance Computing Center Stuttgart (HLRS)
Nobelstrasse 19
70569 Stuttgart

Tel: ++49(0)711-685-87203
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