Virtual Institute — High Productivity Supercomputing


Website disruption

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29th VI-HPS Tuning Workshop, 15-19 Oct. 2018

at HPC Centre ROMEO, Reims, France. 
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ESPT'18 Submission deadline extended

Deadline for submission of full papers is now Aug 6,... 
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ESPT'18 Travel Support from SPEXXA

Authors of accepted papers may apply for travel support... 
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ESPT'18 Submission is open.

Deadline for submission of full papers is July 23,... 
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Most tools targeting MPI rely on the MPI Profiling Interface (PMPI), which allows tools to transparently intercept invocations to MPI routines and with that to establish wrappers around MPI calls to gather execution information. However, the usage of this interface is limited to a single tool. PnMPI eliminates the restriction of a single PMPI tool layer per execution. It can dynamically load and chain multiple PMPI tools into a single tool stack and then interject this complete stack between the target application and the library without changing the view for each individual tool. It enables the user to combine arbitrary MPI tools without having to reimplement them. A registration mechanism enables modules to offer services to other modules loaded by PnMPI and thereby enables code reuse by modularizing common tasks, like datatype flattening or request tracking, without having to recode them in every tool.

Programming models



Open source: LGPL


Lawrence Livermore National Laboratory