General datatypes

Communicating Non-Primitive Datatypes

• Primitive datatypes:

    MPI_INTEGER, MPI_REAL, MPI_DOUBLE
    MPI_COMPLEX, MPI_DOUBLE_COMPLEX
    MPI_LOGICAL, MPI_CHARACTER, MPI_BYTE

• MPI also supports array sections and structures through general datatypes.
• A general datatype is a sequence of primitive types and integer byte displacements
  
  

  Together with a base address, a datatype defines a communication buffer.