C
C  This file is part of MUMPS 5.5.1, released
C  on Tue Jul 12 13:17:24 UTC 2022
C
C
C  Copyright 1991-2022 CERFACS, CNRS, ENS Lyon, INP Toulouse, Inria,
C  Mumps Technologies, University of Bordeaux.
C
C  This version of MUMPS is provided to you free of charge. It is
C  released under the CeCILL-C license 
C  (see doc/CeCILL-C_V1-en.txt, doc/CeCILL-C_V1-fr.txt, and
C  https://cecill.info/licences/Licence_CeCILL-C_V1-en.html)
C
      SUBROUTINE SMUMPS_PROCESS_MASTER2(MYID,BUFR, LBUFR, 
     &     LBUFR_BYTES,
     &     PROCNODE_STEPS, SLAVEF,
     &     IWPOS, IWPOSCB, IPTRLU, LRLU, LRLUS,
     &     N, IW, LIW, A, LA,
     &     PTRIST, PTRAST, STEP, PIMASTER, PAMASTER, NSTK_S,
     &     COMP,
     &     IFLAG, IERROR, COMM, COMM_LOAD,
     &     IPOOL, LPOOL, LEAF, KEEP, KEEP8, DKEEP,
     &     ND, FILS, DAD, FRERE, ITLOC, RHS_MUMPS,
     &     ISTEP_TO_INIV2, TAB_POS_IN_PERE )
      USE SMUMPS_LOAD
      USE SMUMPS_DYNAMIC_MEMORY_M, ONLY : SMUMPS_DM_SET_PTR
      IMPLICIT NONE
      INCLUDE 'mpif.h'
      INTEGER IERR
      INTEGER MYID
      INTEGER KEEP(500)
      INTEGER(8) KEEP8(150)
      REAL DKEEP(230)
      INTEGER LBUFR, LBUFR_BYTES
      INTEGER BUFR( LBUFR )
      INTEGER SLAVEF
      INTEGER(8) :: IPTRLU, LRLU, LRLUS, LA
      INTEGER IWPOS, IWPOSCB
      INTEGER N, LIW
      INTEGER IW( LIW )
      REAL A( LA )
      INTEGER(8) :: PTRAST(KEEP(28))
      INTEGER(8) :: PAMASTER(KEEP(28))
      INTEGER PTRIST(KEEP(28)), STEP(N), PIMASTER(KEEP(28))
      INTEGER PROCNODE_STEPS( KEEP(28) ), ITLOC( N +KEEP(253) )
      REAL :: RHS_MUMPS(KEEP(255))
      INTEGER COMP
      INTEGER NSTK_S( KEEP(28) )
      INTEGER IFLAG, IERROR, COMM, COMM_LOAD
      INTEGER LPOOL, LEAF
      INTEGER IPOOL( LPOOL )
      INTEGER ND(KEEP(28)), FILS( N ), DAD(KEEP(28)), FRERE(KEEP(28))
      INTEGER ISTEP_TO_INIV2(KEEP(71)), 
     &        TAB_POS_IN_PERE(SLAVEF+2,max(1,KEEP(56)))
      INTEGER POSITION, IFATH, ISON, NROW, NCOL, NELIM, 
     &        NSLAVES
      INTEGER(8) :: NOREAL
      INTEGER NOINT, INIV2, NCOL_EFF
      DOUBLE PRECISION FLOP1
      INTEGER NBROWS_ALREADY_SENT, NBROWS_PACKET
      INTEGER NOREAL_PACKET
      LOGICAL PERETYPE2
      INCLUDE 'mumps_headers.h'
      REAL, POINTER, DIMENSION(:) :: SON_A
      INTEGER(8) :: DYN_SIZE
      INTEGER  MUMPS_TYPENODE
      EXTERNAL MUMPS_TYPENODE
      POSITION = 0
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &          IFATH, 1, MPI_INTEGER
     &        , COMM, IERR)
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &        ISON , 1, MPI_INTEGER, 
     &        COMM, IERR)
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &        NSLAVES, 1,
     &        MPI_INTEGER, COMM, IERR )
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &          NROW , 1, MPI_INTEGER
     &        , COMM, IERR)
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &          NCOL , 1, MPI_INTEGER
     &        , COMM, IERR)
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &          NBROWS_ALREADY_SENT, 1,
     &          MPI_INTEGER, COMM, IERR)
      CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &          NBROWS_PACKET, 1,
     &          MPI_INTEGER, COMM, IERR)
      IF ( NSLAVES .NE. 0 .and. KEEP(50).ne.0 ) THEN
        NCOL_EFF = NROW
      ELSE
        NCOL_EFF = NCOL
      ENDIF
      NOREAL_PACKET = NBROWS_PACKET * NCOL_EFF
      IF (NBROWS_ALREADY_SENT .EQ. 0) THEN
        NOINT = 6 + NROW + NCOL + NSLAVES + KEEP(IXSZ)
        NOREAL= int(NROW,8) * int(NCOL_EFF,8)
        CALL SMUMPS_ALLOC_CB(.FALSE.,0_8,.FALSE.,.FALSE.,
     &   MYID,N,KEEP,KEEP8,DKEEP,IW,LIW,A,LA,
     &   LRLU, IPTRLU,IWPOS,IWPOSCB, SLAVEF, PROCNODE_STEPS, DAD,
     &   PTRIST,PTRAST,STEP, PIMASTER, PAMASTER,
     &   NOINT, NOREAL, ISON, S_NOTFREE, .TRUE.,
     &   COMP, LRLUS, KEEP8(67), IFLAG, IERROR
     &     )
        IF ( IFLAG .LT. 0 ) THEN
          RETURN
        ENDIF
        PIMASTER(STEP( ISON )) = IWPOSCB + 1
        PAMASTER(STEP( ISON )) = IPTRLU  + 1_8
        IW( IWPOSCB + 1 + XXNBPR ) = 0  
        IW( IWPOSCB + 1 + KEEP(IXSZ) ) = NCOL
        NELIM = NROW
        IW( IWPOSCB + 2 + KEEP(IXSZ) ) = NELIM
        IW( IWPOSCB + 3 + KEEP(IXSZ) ) = NROW
        IF ( NSLAVES .NE. 0 .and. KEEP(50).ne.0 ) THEN
          IW( IWPOSCB + 4 + KEEP(IXSZ) ) = NROW - NCOL
          IF ( NROW - NCOL .GE. 0 ) THEN
            WRITE(*,*) 'Error in PROCESS_MAITRE2:',NROW,NCOL
            CALL MUMPS_ABORT()
          END IF
        ELSE
          IW( IWPOSCB + 4 + KEEP(IXSZ) ) = 0
        END IF
        IW( IWPOSCB + 5 + KEEP(IXSZ) ) = 1
        IW( IWPOSCB + 6 + KEEP(IXSZ) ) = NSLAVES
        IF (NSLAVES.GT.0) THEN
         CALL MPI_UNPACK( BUFR, LBUFR_BYTES, POSITION,
     &                 IW( IWPOSCB + 7 + KEEP(IXSZ) ),
     &                 NSLAVES, MPI_INTEGER, COMM, IERR )
        ENDIF
        CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &        IW(IWPOSCB + 7 + KEEP(IXSZ) + NSLAVES),
     &        NROW, MPI_INTEGER, COMM, IERR)
        CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &        IW(IWPOSCB + 7 + KEEP(IXSZ) + NROW + NSLAVES),
     &        NCOL, MPI_INTEGER, COMM, IERR)
        IF ( NSLAVES .GT. 0 ) THEN
          INIV2 = ISTEP_TO_INIV2 ( STEP(ISON) )
          CALL MPI_UNPACK(BUFR, LBUFR_BYTES, POSITION,
     &        TAB_POS_IN_PERE(1,INIV2),
     &        NSLAVES+1, MPI_INTEGER, COMM, IERR)
          TAB_POS_IN_PERE(SLAVEF+2,INIV2) = NSLAVES
        ENDIF
      ENDIF
      IF (NOREAL_PACKET.GT.0) THEN
        CALL MUMPS_GETI8(DYN_SIZE, IW(PIMASTER(STEP(ISON))+XXD))
        IF ( DYN_SIZE .GT. 0_8 ) THEN
          CALL SMUMPS_DM_SET_PTR( PAMASTER(STEP(ISON)),
     &                            DYN_SIZE, SON_A )
          CALL MPI_UNPACK( BUFR, LBUFR_BYTES, POSITION,
     &        SON_A( 1_8 +
     &        int(NBROWS_ALREADY_SENT,8) * int(NCOL_EFF,8) ),
     &        NOREAL_PACKET, MPI_REAL, COMM, IERR )
        ELSE
          CALL MPI_UNPACK( BUFR, LBUFR_BYTES, POSITION,
     &        A( PAMASTER(STEP(ISON)) +
     &        int(NBROWS_ALREADY_SENT,8) * int(NCOL_EFF,8) ),
     &        NOREAL_PACKET, MPI_REAL, COMM, IERR )
        ENDIF
      ENDIF
      IF ( NBROWS_ALREADY_SENT + NBROWS_PACKET .EQ. NROW ) THEN
        PERETYPE2 = ( MUMPS_TYPENODE(PROCNODE_STEPS(STEP(IFATH)),
     &                KEEP(199)) .EQ. 2 )
        NSTK_S( STEP(IFATH ))       = NSTK_S( STEP(IFATH) ) - 1
        IF ( NSTK_S( STEP(IFATH)) .EQ. 0 ) THEN
          CALL SMUMPS_INSERT_POOL_N(N, IPOOL, LPOOL, PROCNODE_STEPS,
     &         SLAVEF, KEEP(199),
     &         KEEP(28), KEEP(76), KEEP(80), KEEP(47),
     &         STEP, IFATH )
          IF (KEEP(47) .GE. 3) THEN
             CALL SMUMPS_LOAD_POOL_UPD_NEW_POOL(
     &            IPOOL, LPOOL, 
     &            PROCNODE_STEPS, KEEP,KEEP8, SLAVEF, COMM_LOAD,
     &            MYID, STEP, N, ND, FILS )
          ENDIF
          CALL MUMPS_ESTIM_FLOPS( IFATH, N, PROCNODE_STEPS,
     &                            KEEP(199), ND,
     &                            FILS,FRERE, STEP, PIMASTER,
     &                            KEEP(28), KEEP(50), KEEP(253),
     &                            FLOP1,IW, LIW, KEEP(IXSZ) )
          IF (IFATH.NE.KEEP(20))
     &    CALL SMUMPS_LOAD_UPDATE(1, .FALSE., FLOP1, KEEP,KEEP8)
        END IF
      ENDIF
      RETURN
      END SUBROUTINE SMUMPS_PROCESS_MASTER2
