Lesson 12

Date: 4/21/2010
Computational clusters
Linux for Engineering and IT applications


MPI Standard Data Types

For reasons of portability, MPI predefines its elementary data types. The table below lists those required by the standard.

C Data Types Fortran Data Types
MPI_CHAR signed char MPI_CHARACTER character(1)
MPI_SHORT signed short int    
MPI_INT signed int MPI_INTEGER integer
MPI_LONG signed long int    
MPI_UNSIGNED_CHAR unsigned char    
MPI_UNSIGNED_SHORT unsigned short int    
MPI_UNSIGNED unsigned int    
MPI_UNSIGNED_LONG unsigned long int    
MPI_FLOAT float MPI_REAL real
MPI_DOUBLE double MPI_DOUBLE_PRECISION double precision
MPI_LONG_DOUBLE long double    
    MPI_COMPLEX complex
    MPI_DOUBLE_COMPLEX double complex
    MPI_LOGICAL logical
MPI_BYTE 8 binary digits MPI_BYTE 8 binary digits
MPI_PACKED data packed or unpacked with MPI_Pack()/ MPI_Unpack MPI_PACKED data packed or unpacked with MPI_Pack()/ MPI_Unpack



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