[Mpi3-rma] nested locks

Rajeev Thakur thakur at mcs.anl.gov
Mon Aug 19 15:49:27 CDT 2013


Those are two access epochs on the same rank (say rank 0), as defined by the paragraph above that sentence (pg 437, ln 28).

On Aug 19, 2013, at 2:52 PM, Jeff Hammond wrote:

> you mean lock at those ranks, not by those ranks?  those aren't conflicting so i don't see the issue.  maybe i am a dolt though.
> 
> jeff
> 
> 
> On Mon, Aug 19, 2013 at 2:44 PM, Rajeev Thakur <thakur at mcs.anl.gov> wrote:
> Did we make any change in MPI 3.0 to allow nesting of MPI_Win_lock calls? For example,
> 
> Win_lock(rank 1)
>     Win_lock(rank 2)
> 
>     Win_unlock(rank 2)
> Win_unlock(rank 1)
> 
> I can't find the text we added or deleted to allow this.
> 
> But I do see text that disallows this:
> pg 437, ln 28: "Distinct access epochs for win at the same process must be disjoint."
> 
> Rajeev
> 
> 
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> 
> 
> -- 
> Jeff Hammond
> jeff.science at gmail.com
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