[Mpi3-tools] MPI3 tools WG Mission Statement
m.a.hermanns at fz-juelich.de
Wed Sep 2 13:46:30 CDT 2009
> The goal of this working group is define interfaces that can be used
> by both performance and correctness tools to gain information about
> internals of the MPI library, interactions between an application and
> the MPI library, as well as the system environment an MPI application
> runs in. This is intended as an extension to the existing and widely
> used PMPI interface. These efforts will help in providing reliable
> and portable interfaces for MPI tools with new functionality
> currently not covered by the MPI standard.
Does 'correctness' tools include debuggers? It immediately triggered
things like "Marmot" and not directly Totalview, DDT, etc., as I would
usually not refer to a debugger as a correctness checker (but then, I am
not a native speaker).
To make that a little clearer I would propose the following change:
The goal of this working group is to define interfaces that can be used
by third party tools to obtain internal information about the MPI
library, as well as the system environment an MPI application runs in.
These tools include performance analysis tools, correctness checkers and
debuggers. These interfaces are complementary to the existing PMPI
interface. These efforts will help in providing reliable and portable
interfaces for MPI tools with new functionality currently not covered by
the MPI standard.
> In particular, this WG is aiming at the standardization of the
> following interfaces:
> - A scalable version of a process acquisition interface to identify
> and locate all
> processes which are part of an MPI job.
> - An interface to look for and locate tool DLLs.
> - An interface to inspect message queues.
> - An interface to understand progress in collective communication.
> - An interface to query additional semantic information for opaque MPI
> - A performance information interface that allows MPI implementations
> to export
> additional low level performance information including, but not
> limited to, the
> operating state of the MPI library.
The time frame that was discussed today for the MPI 3.x effort was 3+1
years. That is 3 years until 3.0 is ready, and an additional year for
something like 3.1 (Jeff, feel free to correct me on this). I don't have
the experience yet, to estimate whether it is doable in this time frame,
but the list seems to be quite long. All the items on the list seems
valid points of interest, though.
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