| MPI_GROUP_SIZE(group, size) | |
| IN group | group (handle) |
| OUT size | number of processes in the group (integer) |
int MPI_Group_size(MPI_Group group, int *size)
MPI_GROUP_SIZE(GROUP, SIZE, IERROR)
INTEGER GROUP, SIZE, IERROR
int MPI::Group::Get_size() const
| MPI_GROUP_RANK(group, rank) | |
| IN group | group (handle) |
| OUT rank | rank of the calling process in
group, or MPI_UNDEFINED if the process is not a member (integer) |
int MPI_Group_rank(MPI_Group group, int *rank)
MPI_GROUP_RANK(GROUP, RANK, IERROR)
INTEGER GROUP, RANK, IERROR
int MPI::Group::Get_rank() const
| MPI_GROUP_TRANSLATE_RANKS (group1, n, ranks1, group2, ranks2) | |
| IN group1 | group1 (handle) |
| IN n | number of ranks in ranks1 and ranks2 arrays (integer) |
| IN ranks1 | array of zero or more valid ranks in group1 |
| IN group2 | group2 (handle) |
| OUT ranks2 | array of corresponding ranks in group2, MPI_UNDEFINED when no correspondence exists. |
int MPI_Group_translate_ranks (MPI_Group group1, int n, int *ranks1, MPI_Group group2, int *ranks2)
MPI_GROUP_TRANSLATE_RANKS(GROUP1, N, RANKS1, GROUP2, RANKS2, IERROR)
INTEGER GROUP1, N, RANKS1(*), GROUP2, RANKS2(*), IERROR
static void MPI::Group::Translate_ranks (const MPI::Group& group1, int n, const int ranks1[], const MPI::Group& group2, int ranks2[])
This function is important for determining the relative numbering of the
same processes in two different groups. For instance, if one knows the
ranks of certain processes in the group of MPI_COMM_WORLD, one might want
to know their ranks in a subset of that group.
MPI_PROC_NULL is a valid rank for input to MPI_GROUP_TRANSLATE_RANKS, which returns MPI_PROC_NULL as the translated rank.
| MPI_GROUP_COMPARE(group1, group2, result) | |
| IN group1 | first group (handle) |
| IN group2 | second group (handle) |
| OUT result | result (integer) |
int MPI_Group_compare(MPI_Group group1,MPI_Group group2, int *result)
MPI_GROUP_COMPARE(GROUP1, GROUP2, RESULT, IERROR)
INTEGER GROUP1, GROUP2, RESULT, IERROR
static int MPI::Group::Compare(const MPI::Group& group1, const MPI::Group& group2)
MPI_IDENT results if the group members and group order is
exactly the same in both groups. This happens for instance if
group1 and group2 are the same handle.
MPI_SIMILAR results if the group members are the same but the order is
different. MPI_UNEQUAL results otherwise.