Separate HTML for Basic Foil 35 Simple Example of Derived Datatype

Basic HTML version of Foils prepared 10 Oct 1995

Foil 35 Simple Example of Derived Datatype

From Fox Presentation Fall 1995 CPS615 Basic Simulation Track for Computational Science -- Fall Semester 95. by Geoffrey C. Fox

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