Pack/Unpack

• An alternative approach to grouping data is to pack noncontiguous data into contiguous memory locations (i.e a buffer), send, and then unpack upon arrival

Int MPI_Pack( void* pack_data,

int in_count,

MPI_Datatype datatype,

void* buffer,

int buffer_size,

int* position,

MPI_Comm comm)

Int MPI_Unpack( void* buffer,

int size,

int* position,

void* unpack_data,

int count,

MPI_Datatype datatype,

MPI_Comm comm)

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