[Mpi-forum] MPI_WAIT/MPI_TEST and generalized, I/O, and NBC requests

[William Gropp]

It looks like this is a result of adding new request types without revisiting the original text.  Under generalized requests, there is text that seems to imply that the request is set to MPI_REQUEST_NULL on completion, but it isn't explicit and should be.

This is a chapter committee correction.

Bill

On Feb 10, 2012, at 6:04 PM, Fab Tillier wrote:

> Hi Folks,
> 
> Looking at the text for MPI_WAIT (page 54, line 15) and MPI_TEST (page 55, line 7), it seems to imply that the request handle is only set to MPI_REQUEST_NULL for non-blocking send and receive requests.  Are generalized, I/O, and NBC requests not completed the same way?  Are users required to free such requests explicitly after they complete using MPI_REQUEST_FREE?
> 
> I would have expected that all request handles except those to persistent requests are set to MPI_REQUEST_NULL, and persistent request just rather marked inactive.  If that is indeed the intent, shouldn't we update the text to reflect this?  Is this a ticket-0 level change?
> 
> Thanks,
> -Fab
> 
> 
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William Gropp
Director, Parallel Computing Institute
Deputy Director for Research
Institute for Advanced Computing Applications and Technologies
Paul and Cynthia Saylor Professor of Computer Science
University of Illinois Urbana-Champaign



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