Hi every one,
I'm currently working on a monitoring component for OpenMPI. After
browsing the MPI standard, in order to know what the MPI_Tools interface
looks like, and how it's working, I had a look at the code I recieved
and something surprised me. I can't find anywhere any reference to the
sessions (MPI_T_pvar_session).
How is it dealt with in the ompi engine? Are the call-back functions
simply called when necessary, trusting the calling layers for that, or
should it be managed manually? How to get the reference to the object on
which the pvar is linked? And to the session (for a per-session
monitoring for example, in parallel with a global monitopring)? If one
object is monitored in two sessions, both actives at the same time, are
the call-back functions called twice?
Probably, it should be possible to answer to most of this questions in
one simple one : is there a programmation reference for the MPI_Tools
implementation somewhere? If so, where would it be?
Thank you in advance.
Clément FOYER
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