Name
HPL_sdrv Send and receive a message.
Synopsis
#include "hpl.h"
int
HPL_sdrv(
double *
SBUF,
int
SCOUNT,
int
STAG,
double *
RBUF,
int
RCOUNT,
int
RTAG,
int
PARTNER,
MPI_Comm
COMM
);
Description
HPL_sdrv
is a simple wrapper around MPI_Sendrecv. Its main purpose is
to allow for some experimentation and tuning of this simple function.
Messages  of  length  less than  or  equal to zero  are not sent  nor
received.  Successful completion  is  indicated by the returned error
code HPL_SUCCESS.
Arguments
SBUF    (local input)                 double *
        On entry, SBUF specifies the starting address of buffer to be
        sent.
SCOUNT  (local input)                 int
        On entry,  SCOUNT  specifies  the number  of double precision
        entries in SBUF. SCOUNT must be at least zero.
STAG    (local input)                 int
        On entry,  STAG  specifies the message tag to be used for the
        sending communication operation.
RBUF    (local output)                double *
        On entry, RBUF specifies the starting address of buffer to be
        received.
RCOUNT  (local input)                 int
        On entry,  RCOUNT  specifies  the number  of double precision
        entries in RBUF. RCOUNT must be at least zero.
RTAG    (local input)                 int
        On entry,  RTAG  specifies the message tag to be used for the
        receiving communication operation.
PARTNER (local input)                 int
        On entry,  PARTNER  specifies  the rank of the  collaborative
        process in the communication space defined by COMM.
COMM    (local input)                 MPI_Comm
        The MPI communicator identifying the communication space.
See Also
HPL_send,
HPL_recv.