Rolf and Torsten: It really seems to me that these changes exceed the guidelines that Rich and Bill have given for the release draft. While I understand the reasoon behind them, it is unclear that we will have reviewed them properly. For example, I think the wording below could use work. I am in transit to ANL right now so I cannot go over it properly until at least tonight... Even then, this feels rushed. Bronis On Tue, 2 Nov 2010, MPI Forum wrote:

#109: Nonblocking Collective Operations --------------------------------------------------------+------------------- Reporter: htor | Owner: htor Type: New routine(s) | Status: new Priority: Waiting for PDF reviews | Milestone: 2009/02/09 San Jose Version: MPI 3.0 | Keywords: Implementation: Completed | Author_bill_gropp: 1 Author_rich_graham: 0 | Author_adam_moody: 0 Author_torsten_hoefler: 1 | Author_dick_treumann: 0 Author_jesper_larsson_traeff: 0 | Author_george_bosilca: 0 Author_david_solt: 0 | Author_bronis_de_supinski: 0 Author_rajeev_thakur: 0 | Author_jeff_squyres: 0 Author_alexander_supalov: 0 | Author_rolf_rabenseifner: 1 --------------------------------------------------------+-------------------

Comment(by htor):

Replying to [comment:44 RolfRabenseifner]:

...

Whether we use now the text in my last comment or, a more complete text, we can decide now or later, but I would prefer a more complete text, because then it is clear why this exception is only for 4 completion routines:

The fields in a status object returned by a call to MPI_WAIT, MPI_TEST, or MPI_{TEST|WAIT}{ALL|SOME|ANY}, where the request corresponds to a nonblocking collective call, are undefined, with one exceptions: The error status field will contain valid information if the wait or test call returned with MPI_ERR_IN_STATUS. MPI_ERR_IN_STATUS can be returned only by MPI_{TEST|WAIT}{ALL|SOME}, because only these MPI completion functions take arrays of MPI_STATUS.

Rolf and I decided to adopt this minor change (with slight modifications) and clear fix after a phone call. It now reads:

"The fields in a status object returned by a call to MPI_WAIT, MPI_TEST, or any of the other derived functions (MPI_{TEST|WAIT}{ALL|SOME|ANY}), where the request corresponds to a send call, are undefined, with one exception: The error status field will contain valid information if the wait or test call returned with MPI_ERR_IN_STATUS. MPI_ERR_IN_STATUS should be returned only by MPI_{TEST|WAIT}{ALL|SOME}, because only these MPI completion functions take arrays of MPI_STATUS."

See revision 679.

Thanks, Torsten

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