Scripted HTML version of Foils prepared 11 November 1996

Foil 16 Simple Example of Derived Datatype

From CPS615-Completion of MPI foilset and Application to Jacobi Iteration in 2D Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 7 November 96. by Geoffrey C. Fox *
Secs 97.9
integer derivedtype, ...
call MPI_TYPE_CONTIGUOUS(10, MPI_REAL, derivedtype, ierr)
call MPI_TYPE_COMMIT(derivedtype, ierr)
call MPI_SEND(data, 1, derivedtype, dest,tag, MPI_COMM_WORLD, ierr)
call MPI_TYPE_FREE(derivedtype, ierr)
is equivalent to simpler single call
call MPI_SEND(data, 10, MPI_REAL, dest, tag, MPI_COMM_WORLD, ierr)
and each sends 10 contiguous real values at location data to process dest

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