[mpiwg-tools] Ticket #383 -- Final text?

Bronis R. de Supinski bronis at llnl.gov
Mon May 19 10:03:18 CDT 2014

"sufficiently long enough" is redundant; "sufficiently long"
is sufficient.

On Mon, 19 May 2014, Jeff Squyres (jsquyres) wrote:

> On May 18, 2014, at 2:35 AM, Martin Schulz <schulzm at llnl.gov> wrote:
>> Hi Kathryn, all,
>> A few comments:
>> - "Adhere to the same definition from the MPI implementation.” - not sure
>> what we meant with this anymore. Perhaps we should just drop this part.
> What I meant by that is that each MPI implementation will create a definition for each cvar/pvar/etc.  The implementation must adhere to that same definition in all connected processes.  I.e., it can't change the definition of exactly what that variable is in different processes (e.g., bytes_in = bytes received from TCP in one process, but bytes received across shared memory in another process).
>> - "OUT index values” is not correct, since index values are IN parameters
>> to the get_info calls. Perhaps just drop OUT?
> Good catch; missed that.  Yes, this whole clause can go.
>> - The mandate of equal OUT/INPUT values is also not quite right - for the
>> strings, it’s OK to return substrings of the size argument is too small. I
>> know that’s a technicality, but I am not sure if this causes problems
>> later down the road.
> Mmm.  Good point.  So the current text is:
> * Return the same INOUT and OUT values from the relevant MPI_T_*_GET_INFO function.
> (I took the liberty of dropping the index value clause)
> I notice that we actually return 3 kinds of things from GET_INFO functions: integers/enums, strings, and MPI handles (i.e., MPI_Datatype).  So how about this:
> * Return the same INOUT and OUT integer and enum values from the relevant MPI_T_*_GET_INFO function.
> * If sufficiently long enough string length IN parameters are supplied, return the same string OUT parameters from the relevant MPI_T_*_GET_INFO function.
> * Return a handle to an equivalent MPI object from the relevant MPI_T_*_GET_INFO function.
> -- 
> Jeff Squyres
> jsquyres at cisco.com
> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
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