| 1 |
C $Id$ |
| 2 |
SUBROUTINE INI_MP |
| 3 |
|
| 4 |
C Initialise multi-processing |
| 5 |
IMPLICIT NONE |
| 6 |
|
| 7 |
C == Global data == |
| 8 |
#include "SIZE.h" |
| 9 |
#include "EEPARAMS.h" |
| 10 |
|
| 11 |
#include "JAM_INFO.h" |
| 12 |
|
| 13 |
#ifdef ALLOW_MPI |
| 14 |
#include "mpif.h" |
| 15 |
#include "MPI_INFO.h" |
| 16 |
#endif |
| 17 |
|
| 18 |
C == Local variables == |
| 19 |
#ifdef USE_JAM_INIT |
| 20 |
Real*8 dummyVal |
| 21 |
INTEGER myTwoProcRank |
| 22 |
#endif |
| 23 |
INTEGER rc |
| 24 |
CHARACTER*(MAX_LEN_FNAM) fnam |
| 25 |
#ifdef DECOMP2D |
| 26 |
integer dimens(2), coords(2), comm_cart |
| 27 |
logical periods(2) |
| 28 |
periods(1) = .true. |
| 29 |
periods(2) = .true. |
| 30 |
#endif |
| 31 |
|
| 32 |
myXGlobalLo =1 |
| 33 |
myYGlobalLo =1 |
| 34 |
myProcId =0 |
| 35 |
numberOfProcs =1 |
| 36 |
Nx = sNx |
| 37 |
Ny = sNy |
| 38 |
standardMessageUnit=6 |
| 39 |
|
| 40 |
#ifdef USE_MPI_INIT |
| 41 |
C MPI Initialisation |
| 42 |
CALL MPI_INIT( rc ) |
| 43 |
C Get my proc. number |
| 44 |
CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpi_pid, rc ) |
| 45 |
C Get total count of procs. |
| 46 |
CALL MPI_COMM_SIZE( MPI_COMM_WORLD, mpi_np , rc ) |
| 47 |
|
| 48 |
numberOfProcs = mpi_np |
| 49 |
myProcId = mpi_pid |
| 50 |
comm_use = MPI_COMM_WORLD |
| 51 |
#ifdef DECOMP2D |
| 52 |
c |
| 53 |
OPEN(UNIT=21,FILE="decomp.touse") |
| 54 |
read(21,*) dimens(1) |
| 55 |
read(21,*) dimens(2) |
| 56 |
if ((dimens(1)*dimens(2)) .ne. mpi_np) then |
| 57 |
if (mpi_pid .eq. 0) then |
| 58 |
write(0,*) 'Letting MPI choose a decomposition' |
| 59 |
endif |
| 60 |
dimens(1) = 0 |
| 61 |
dimens(2) = 0 |
| 62 |
call mpi_dims_create(mpi_np, 2, dimens, rc) |
| 63 |
endif |
| 64 |
|
| 65 |
call mpi_cart_create(MPI_COMM_WORLD, 2, dimens, periods, .true., |
| 66 |
$ comm_cart, rc) |
| 67 |
if (mpi_pid .eq. 0) then |
| 68 |
write(0,*) 'using a ', dimens(1), ' x ', dimens(2), |
| 69 |
$ ' decomposition' |
| 70 |
endif |
| 71 |
call mpi_comm_rank(comm_cart, mpi_pid, rc) |
| 72 |
call mpi_cart_coords(comm_cart, mpi_pid, 2, coords, rc) |
| 73 |
C Set up connectivity |
| 74 |
call mpi_cart_shift(comm_cart, 0, 1, mpi_southId, mpi_northId, rc) |
| 75 |
call mpi_cart_shift(comm_cart, 1, 1, mpi_westId, mpi_eastId, rc) |
| 76 |
c create the derived datatype |
| 77 |
call mpi_type_vector(sNy,OLx,sNx+OLx*2,_MPI_TYPE_REAL,ewslice, rc) |
| 78 |
call mpi_type_commit(ewslice, rc) |
| 79 |
call mpi_type_vector(OLy,sNx,sNx+OLx*2,_MPI_TYPE_REAL,nsslice, rc) |
| 80 |
call mpi_type_commit(nsslice, rc) |
| 81 |
c replace the communicator used |
| 82 |
comm_use = comm_cart |
| 83 |
#else |
| 84 |
C Set up connectivity |
| 85 |
mpi_northId = mpi_pid+1 |
| 86 |
IF ( mpi_northId .EQ. mpi_np ) mpi_northId = 0 |
| 87 |
mpi_southId = mpi_pid-1 |
| 88 |
IF ( mpi_southId .LT. 0 ) mpi_southId = mpi_np-1 |
| 89 |
#endif |
| 90 |
|
| 91 |
#endif |
| 92 |
|
| 93 |
|
| 94 |
#ifdef USE_JAM_INIT |
| 95 |
C JAM initialisation. This should work with or without |
| 96 |
C MPI. If we don't use MPI we have to start procs. by hand |
| 97 |
C though! |
| 98 |
|
| 99 |
myTwoProcRank=MOD(myProcId,2) |
| 100 |
IF ( myTwoProcRank .EQ. 0 ) THEN |
| 101 |
myTwoProcRank = 1 |
| 102 |
ELSE |
| 103 |
myTwoProcRank = 0 |
| 104 |
ENDIF |
| 105 |
CALL JAM_collective_init( myTwoProcRank ) |
| 106 |
|
| 107 |
CALL GET_JAM_self_address( jam_pid ) |
| 108 |
CALL GET_JAM_partition_size( jam_np ) |
| 109 |
jam_exchKey = 100 |
| 110 |
dummyVal = 0. _d 0 |
| 111 |
CALL JAM_barrier_start( dummyVal ) |
| 112 |
CALL JAM_barrier_done( dummyVal ) |
| 113 |
|
| 114 |
C Set up connectivity |
| 115 |
jam_northId = jam_pid+1 |
| 116 |
IF ( jam_northId .EQ. jam_np ) jam_northId = 0 |
| 117 |
jam_southId = jam_pid-1 |
| 118 |
IF ( jam_southId .LT. 0 ) jam_southId = jam_np-1 |
| 119 |
|
| 120 |
numberOfProcs = jam_np |
| 121 |
myProcId = jam_pid |
| 122 |
|
| 123 |
mpi_northId = jam_northId |
| 124 |
mpi_southId = jam_southId |
| 125 |
|
| 126 |
#endif |
| 127 |
|
| 128 |
#if defined(ALLOW_MPI) && defined(DECOMP2D) |
| 129 |
myXGlobalLo = coords(1)*sNx+1 |
| 130 |
myYGlobalLo = coords(2)*sNy+1 |
| 131 |
Nx = dimens(1)*sNx |
| 132 |
Ny = dimens(2)*sNy |
| 133 |
#else |
| 134 |
myYGlobalLo = myProcId*sNy+1 |
| 135 |
Ny = numberOfProcs*sNy |
| 136 |
#endif |
| 137 |
IF ( numberOfProcs .GT. 1 ) THEN |
| 138 |
WRITE(fnam,'(A7,I6.6)') 'STDOUT.',myProcId |
| 139 |
OPEN(UNIT=standardMessageUnit,FILE=fnam) |
| 140 |
ENDIF |
| 141 |
|
| 142 |
|
| 143 |
RETURN |
| 144 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph