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- W2117191303 abstract "MPI implementations can realize MPI operations with any algorithm that fulfills the specified semantics. To provide optimal efficiency the MPI implementation might choose the algorithm dynamically, depending on the parameters given to the function call. However, this selection is not transparent to the user. While this abstraction is appropriate for common users, achieving best performance with fixed parameter sets requires knowledge of internal processing. Also, for developers of collective operations it might be useful to understand timing issues inside the communication or I/O call. In this paper we extended the PIOviz environment to trace MPI internal communication. Thus, this allows the user to see PVFS server behavior together with the behavior in the MPI application and inside MPI itself. We present some analysis results for these capabilities for MPICH2 on a Beowulf Cluster." @default.
- W2117191303 created "2016-06-24" @default.
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- W2117191303 date "2009-12-01" @default.
- W2117191303 modified "2023-09-23" @default.
- W2117191303 title "Tracing Internal Communication in MPI and MPI-I/O" @default.
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- W2117191303 doi "https://doi.org/10.1109/pdcat.2009.9" @default.
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