Fix issue with definition of nonblocking in One Sided Chapter

[mpiforumbot]

Originally by htor on 2011-10-24 18:50:13 -0500

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Author: RMA Working Group

Description

This problem exists since MPI-2.0. Example 11.5 states that MPI_PUT may block which conflicts with the earlier definition of "nonblocking". This sentence is correct because it's only relative to the example but it's misleading users and implementers to believe that MPI_PUT is allowed to block in general.

History

None.

Proposed Solution

Possible solution: fix sentence on Page 39 Line 21, Example 11.5:
remove "or, the call MPI_WIN_LOCK may not block, while the call to MPI_PUT blocks until a lock is acquired;"

Impact on Implementations

Minor (some unusual implementations may become invalid)

Impact on Applications / Users

None.

Alternative Solutions

Entry for the Change Log

[mpiforumbot]

Originally by rsthakur on 2011-12-08 21:37:17 -0600

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The way nonblocking is defined for RMA operations is:

On pg 10, ln 43-44: "These operations are nonblocking: the call initiates the transfer, but the transfer may continue after the call returns."

That's all it says. That doesn't prevent put from blocking to acquire a lock.

[mpiforumbot]

Originally by snir on 2012-01-06 17:17:48 -0600

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agree with proposed solution: discussion of example was not intended to define general semantics of non-blocking RMA

[mpiforumbot]

Originally by htor on 2012-02-26 11:41:00 -0600

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Implemented in the updated RMA chapter -- this issues is more like a ticket 0 change because it does not change any semantics. It only removes a confusing sentence from an example (which was non-normative anyway).

[mpiforumbot]

Originally by htor on 2012-02-26 11:41:54 -0600

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Attachment added: one-side-2.pdf (585.7 KiB)

[mpiforumbot]

Originally by htor on 2012-07-17 09:17:44 -0500

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Committed to approved/one-sided. Please review.

Torsten

[mpiforumbot]

Originally by goodell on 2012-07-17 21:32:25 -0500

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Review OK as of Torsten's recent PDF sent out.

[mpiforumbot]

Originally by jsquyres on 2012-07-18 09:53:05 -0500

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Appears to be fully committed. Moving to "Waiting for PDF reviews".