GNU.WIKI: The GNU/Linux Knowledge Base

  [HOME] [PHP Manual] [HowTo] [ABS] [MAN1] [MAN2] [MAN3] [MAN4] [MAN5] [MAN6] [MAN7] [MAN8] [MAN9]

  [0-9] [Aa] [Bb] [Cc] [Dd] [Ee] [Ff] [Gg] [Hh] [Ii] [Jj] [Kk] [Ll] [Mm] [Nn] [Oo] [Pp] [Qq] [Rr] [Ss] [Tt] [Uu] [Vv] [Ww] [Xx] [Yy] [Zz]


NAME

       MPI_Start  -  Initiates  a  communication  using  a  persistent request
       handle.

SYNTAX


C Syntax

       #include <mpi.h>
       int MPI_Start(MPI_Request *request)

Fortran Syntax

       INCLUDE 'mpif.h'
       MPI_START(REQUEST, IERROR)
            INTEGER   REQUEST, IERROR

C++ Syntax

       #include <mpi.h>
       void Prequest::Start()

INPUT PARAMETER

       request   Communication request (handle).

OUTPUT PARAMETER

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       A communication (send or receive) that uses  a  persistent  request  is
       initiated by the function MPI_Start.

       The  argument,  request,  is a handle returned by one of the persistent
       communication-request    initialization    functions    (MPI_Send_init,
       MPI_Bsend_init,   MPI_Ssend_init,  MPI_Rsend_init,  MPI_Recv_init). The
       associated request should be inactive and becomes active once the  call
       is made.

       If  the  request is for a send with ready mode, then a matching receive
       should be posted before the call is made. From the  time  the  call  is
       made  until  after  the  operation  completes, the communication buffer
       should not be accessed.

       The  call  is  local,  with  semantics  similar  to   the   nonblocking
       communication  operations  (see  Section  3.7  in  the  MPI-1 Standard,
       "Nonblocking Communication.") That is,  a  call  to  MPI_Start  with  a
       request  created  by  MPI_Send_init  starts a communication in the same
       manner as a call to MPI_Isend; a  call  to  MPI_Start  with  a  request
       created  by MPI_Bsend_init starts a communication in the same manner as
       a call to MPI_Ibsend; and so on.

ERRORS

       Almost all MPI routines return an error value; C routines as the  value
       of  the  function  and  Fortran  routines  in  the  last  argument. C++
       functions do not return errors. If the default error handler is set  to
       MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
       will be used to throw an MPI:Exception object.

       Before the error value is returned, the current MPI  error  handler  is
       called.  By  default, this error handler aborts the MPI job, except for
       I/O  function  errors.  The  error  handler   may   be   changed   with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
       may be used to cause error values to be returned. Note  that  MPI  does
       not guarantee that an MPI program can continue past an error.

SEE ALSO

       MPI_Bsend_init
       MPI_Rsend_init
       MPI_Send_init
       MPI_Sssend_init
       MPI_Recv_init
       MPI_Startall



  All copyrights belong to their respective owners. Other content (c) 2014-2018, GNU.WIKI. Please report site errors to webmaster@gnu.wiki.
Page load time: 0.100 seconds. Last modified: November 04 2018 12:49:43.