Re: [Boost-bugs] [Boost C++ Libraries] #5596: MPI: problem creating communicator

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5596: MPI: problem creating communicator
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-04-15 16:59:27

#5596: MPI: problem creating communicator
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  Reporter:  irek.szczesniak@…          |       Owner:  dgregor
      Type:  Bugs                       |      Status:  new    
 Milestone:  To Be Determined           |   Component:  mpi    
   Version:  Boost 1.42.0               |    Severity:  Problem
Resolution:                             |    Keywords:         
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Comment (by bschaeling):

 A new communicator must always be created for all processes. The
 constructor calls MPI_Comm_create() which must be executed by all
 processes, even if they don't belong to the new group (see http://www.mpi-

 forum.org/docs/mpi-11-html/node102.html).

 However I can confirm that I also have to call MPI_Finalize() myself (I'm
 using Boost 1.49.0). This call is only required though for those processes
 which don't belong to the newly created group. Boost.MPI behaves as if it
 skips calling MPI_Finalize() in the destructor of boost::mpi::environment
 for those processes.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5596#comment:9>
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