[Mpi3-rma] nested locks

[Torsten Hoefler]

Agreed -- I think it's a bug and we should fix it asap.

Best,
  Torsten

On Mon, Aug 19, 2013 at 03:47:39PM -0500, Rajeev Thakur wrote:
> It is still disallowed in MPI-3 by this sentence
> 
> pg 437, ln 28: Distinct access epochs for win at the same process must be disjoint. 
> 
> 
> On Aug 19, 2013, at 3:13 PM, Jim Dinan wrote:
> 
> > Jeff,
> > 
> > With apologies if I have misunderstood your question.  To clarify, the example Rajeev gave was forbidden in MPI-2.  One could not have concurrent passive target access epochs, even if they accessed different targets.  It is allowed in MPI-3.
> > 
> >  ~Jim.
> > 
> > 
> > On Mon, Aug 19, 2013 at 3:52 PM, Jeff Hammond <jeff.science at gmail.com> 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
> > 
> > 
> > _______________________________________________
> > mpi3-rma mailing list
> > mpi3-rma at lists.mpi-forum.org
> > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma
> > 
> > 
> > 
> > -- 
> > Jeff Hammond
> > jeff.science at gmail.com
> > 
> > _______________________________________________
> > mpi3-rma mailing list
> > mpi3-rma at lists.mpi-forum.org
> > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma
> > 
> > _______________________________________________
> > mpi3-rma mailing list
> > mpi3-rma at lists.mpi-forum.org
> > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma
> 
> 
> _______________________________________________
> mpi3-rma mailing list
> mpi3-rma at lists.mpi-forum.org
> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma

-- 
### qreharg rug ebs fv crryF ----------- http://htor.inf.ethz.ch/ -----
Torsten Hoefler           | Assistant Professor
Dept. of Computer Science | ETH Zürich
Universitätsstrasse 6     | Zurich-8092, Switzerland
CAB E 64.1                | Phone: +41 76 309 79 29