spmd_crk_idmax.F File Reference

#include "implicit_f.inc"
#include "spmd.inc"
#include "com01_c.inc"
#include "com04_c.inc"
#include "task_c.inc"

Go to the source code of this file.

Functions/Subroutines
subroutine	spmd_crk_idmax (idmax, itab)

Function/Subroutine Documentation

spmd_crk_idmax()

subroutine spmd_crk_idmax	(	integer	idmax,
		integer, dimension(*)	itab )

Definition at line 32 of file spmd_crk_idmax.F.

C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
        USE spmd_comm_world_mod, ONLY : spmd_comm_world
#include      "implicit_f.inc"
C-----------------------------------------------------------------
C   M e s s a g e   P a s s i n g
C-----------------------------------------------
#include "spmd.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com01_c.inc"
#include      "com04_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER IDMAX,ITAB(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER IDMAXL, I, ITAG, MSGOFF, IDMAXP(NSPMD-1), 
     .        REQ(NSPMD-1), IERR, STAT(MPI_STATUS_SIZE,NSPMD-1)
C-----------------------------------------------
      DATA msgoff/7063/
C-----------------------------------------------
      idmaxl=0
      DO i=1,numnod
         idmaxl=max(idmaxl,itab(i))
      ENDDO
      IF (ispmd==0) THEN
         DO i=1,nspmd-1
            itag=msgoff
            CALL mpi_irecv(idmaxp(i), 1, mpi_integer, it_spmd(i+1),
     .                     itag, spmd_comm_world, req(i), ierr)
         ENDDO
         CALL mpi_waitall(nspmd-1, req, stat, ierr)
C
         idmax=idmaxl
         DO i=1,nspmd-1
            idmax=max(idmax,idmaxp(i))
         ENDDO
      ELSE
         itag=msgoff
         CALL mpi_isend(idmaxl, 1, mpi_integer, it_spmd(1),
     .                  itag, spmd_comm_world, req, ierr)
         CALL mpi_wait(req, stat, ierr)
      ENDIF
C
#endif
      RETURN