mpi.send.Robj: Extensions of MPI\_Send and MPI\_Recv APIs
In snoweye/Rmpi_PROF: Interface (Wrapper) to MPI (Message-Passing Interface)

Description Usage Arguments Details Value Author(s) References See Also

mpi.send.Robj and mpi.recv.Robj are two extensions of mpi.send and mpi.recv. They are used to transmit a general R object from any source to any destination.

mpi.isend.Robj is a nonblocking version of mpi.send.Robj.

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mpi.send.Robj(obj, dest, tag, comm = 1)
mpi.isend.Robj(obj, dest, tag, comm = 1, request=0)
mpi.recv.Robj(source, tag, comm = 1, status = 0)

`obj`	an R object. Can be any R object.
`dest`	the destination rank.
`source`	the source rank or mpi.any.source() for any source.
`tag`	non-negative integer or mpi.any.tag() for any tag.
`comm`	a communicator number.
`request`	a request number.
`status`	a status number.

mpi.send.Robj and mpi.isend.Robj use serialize to encode an R object into a binary char vector. It sends the message to the destination. The receiver decode the message back into an R object by using unserialize.

If mpi.isend.Robj is used, mpi.wait or mpi.test must be used to check the object has been sent.

mpi.send.Robj or mpi.isend.Robj return no value. mpi.recv.Robj returns the the transmitted R object.

Hao Yu

http://www.lam-mpi.org/, http://www-unix.mcs.anl.gov/mpi/www/www3/

mpi.send, mpi.recv, mpi.wait, serialize, unserialize,