npRmpi (version 0.60-20)

mpi.cart.get: MPI_Cart_get

Description

mpi.cart.get provides the user with information on the Cartesian topology associated with a comm.

Usage

mpi.cart.get(comm=3, maxdims)

Value

mpi.cart.get returns a vector containing information on the Cartesian topology associated with comm. maxdims must be at least ndims as returned by mpi.cartdim.get.

Arguments

comm

Communicator with Cartesian structure

maxdims

length of vectors dims, periods, and coords in the calling program

Author

Alek Hunchak and Hao Yu

Details

The coords are as given for the rank of the calling process as shown.

References

https://www.mpich.org/, https://www.mpich.org/static/docs/latest/www3/

See Also

mpi.cart.create,mpi.cartdim.get

Examples

if (FALSE) {
# Not run in checks: requires a Cartesian communicator built from spawned slaves.
#Need at least 9 slaves
mpi.bcast.cmd(mpi.cart.create(1,c(3,3),c(F,T)))
mpi.cart.create(1,c(3,3),c(F,T))
mpi.remote.exec(mpi.cart.get(3,2))
}