Persistent communication requests

Prequest Comm.Send_init(Object buf, int offset, int count,
                        Datatype datatype, int dest, int tag)

buf	send buffer array
offset	initial offset in send buffer
count	number of items to send
datatype	datatype of each item in send buffer
dest	rank of destination
tag	message tag
returns:	persistent communication request

Creates a persistent communication request for a standard mode send. Java binding of the MPI operation MPI_SEND_INIT. Further comments as for Send.

Prequest Comm.Bsend_init(Object buf, int offset, int count,
                         Datatype datatype, int dest, int tag)

buf	send buffer array
offset	initial offset in send buffer
count	number of items to send
datatype	datatype of each item in send buffer
dest	rank of destination
tag	message tag
returns:	persistent communication request

Creates a persistent communication request for a buffered mode send. Java binding of the MPI operation MPI_BSEND_INIT. Further comments as for Send.

Prequest Comm.Ssend_init(Object buf, int offset, int count,
                         Datatype datatype, int dest, int tag)

buf	send buffer array
offset	initial offset in send buffer
count	number of items to send
datatype	datatype of each item in send buffer
dest	rank of destination
tag	message tag
returns:	persistent communication request

Creates a persistent communication request for a synchronous mode send. Java binding of the MPI operation MPI_SSEND_INIT. Further comments as for Send.

Prequest Comm.Rsend_init(Object buf, int offset, int count,
                         Datatype datatype, int dest, int tag)

buf	send buffer array
offset	initial offset in send buffer
count	number of items to send
datatype	datatype of each item in send buffer
dest	rank of destination
tag	message tag
returns:	persistent communication request

Creates a persistent communication request for a ready mode send. Java binding of the MPI operation MPI_RSEND_INIT. Further comments as for Send.

Prequest Comm.Recv_init(Object buf, int offset, int count,
                        Datatype datatype, int source, int tag)

buf	receive buffer array
offset	initial offset in receive buffer
count	number of items in receive buffer
datatype	datatype of each item in receive buffer
source	rank of source
tag	message tag
returns:	persistent communication request

Creates a persistent communication request for a receive operation. Java binding of the MPI operation MPI_RECV_INIT. Further comments as for Recv.

void Prequest.Start()

Activate a persistent communication request. Java binding of the MPI operation MPI_START. The communication is completed by using the request in one of the operations Request.Wait, Request.Test, Request.Waitany, Request.Testany, Request.Waitall, Request.Testall, Request.Waitsome, or Request.Testsome. On successful completion the request becomes inactive again. It can be reactivated by a further call to Start.

static void Prequest.Startall(Prequest [] array_of_requests)

array_of_requests

array of persistent communication requests

Activate a list of communication requests. Java binding of the MPI operation MPI_STARTALL.