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HPL_sdrv(3)                  HPL Library Functions                 HPL_sdrv(3)

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 (3), HPL_recv (3).

HPL 2.1                        October 26, 2012                    HPL_sdrv(3)