Subject: [Boost-mpi] Collective Operations for Serialized Types
From: Lorenz HÃ¼bschle-Schneider (huebschle_at_[hidden])
Date: 2015-08-26 05:32:07
as I understand the Boost.MPI code, collective operations on types that
need to be serialized always use point-to-point operations, e.g.
This is vastly inefficient, and frankly the claim that MPI_Bcast cannot
be used in this case does not make sense to me. Is there a case where
would not work?
I used the same idea to implement an Allgatherv operation on vectors
(including size exchanges) and have been using it without issues.
However, that requires a bit of awfulness, and I severely doubt that
such ugly code would ever make it into Boost.MPI ;) For the curious, it
(along with some other wacky things which I do not recommend anyone use)
can be found at
-- Karlsruhe Institute of Technology (KIT) Institute of Theoretical Informatics Lorenz HÃ¼bschle-Schneider Am Fasanengarten 5 Building 50.34, Room 206 76131 Karlsruhe, Germany Phone: +49 721 608-46602 Fax: +49 721 608-43088 Email: huebschle_at_[hidden] Web: http://www.kit.edu/ KIT â University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association
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