Sample solution

Content

Transfer of self-defined data types using MPI
Sample solution
Transfer of matrices using MPI
Sample solution
Boundaries and extent of an MPI data type
Sample solution
Jacobi solver for boundary value problems
Sample solution

This works indeed as we can work with multiple blocks in this case where one block represents a row of a our matrix. This works only in cases where the elements of a row are stored consecutively in memory, i.e. where we have A.incCol() == 1:

MPI_Type_vector(
   /* count = */ A.numRows(),
   /* blocklength = */ A.numCols(),
   /* stride = */ A.incRow(),
   /* element type = */ get_type(A(0, 0)),
   /* newly created type = */ &datatype);