[Boost-bugs] [Boost C++ Libraries] #11074: boost::mpi an order of magnitude slower than pure MPI for sending vector of doubles

Subject: [Boost-bugs] [Boost C++ Libraries] #11074: boost::mpi an order of magnitude slower than pure MPI for sending vector of doubles
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-03-05 16:14:53

#11074: boost::mpi an order of magnitude slower than pure MPI for sending vector of
doubles
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 Reporter:  ilja.j.honkonen@…  |      Owner:  troyer
     Type:  Bugs               |     Status:  new
Milestone:  To Be Determined   |  Component:  mpi
  Version:  Boost 1.57.0       |   Severity:  Problem
 Keywords:                     |
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 As detailed in my email to boost users (h ttp://lists.boost.org/boost-
 users/2015/02/83807.php) it seems to take an order of magnitude longer to
 send a vector of doubles using boost::mpi than it takes using C bindings
 of MPI. I couldn't find anything in the documentation about optimizing
 transfers of standard types so I'd assume they are already optimized but
 that doesn't seem to be the case. Am I missing something or is there a
 serious performance issue in boost::mpi when sending (largeish) vectors of
 standard or more complex types?

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/11074>
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