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ex6.f90
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!>
!> @file ex6.f90
!>
!> @brief
!>
!> @copyright
!> Copyright (©) 2021 EPFL (Ecole Polytechnique Fédérale de Lausanne)
!> SPC (Swiss Plasma Center)
!>
!> spclibs is free software: you can redistribute it and/or modify it under
!> the terms of the GNU Lesser General Public License as published by the Free
!> Software Foundation, either version 3 of the License, or (at your option)
!> any later version.
!>
!> spclibs is distributed in the hope that it will be useful, but WITHOUT ANY
!> WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
!> FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
!>
!> You should have received a copy of the GNU Lesser General Public License
!> along with this program. If not, see <https://www.gnu.org/licenses/>.
!>
!> @authors
!> (in alphabetical order)
!> @author Trach-Minh Tran <trach-minh.tran@epfl.ch>
!>
PROGRAM main
!
! Tranpsose of matrices partitionned on a 2d proc grid:
! - A(n1/P1,n2,n3/P2) -> AT(n1/P1,n3,n2/P2)
! - B(n1,n2,n3/P1,n4/P2) -> BT(n1,n3,n2/P1,n4/P2)
! - C(n1,n2,n3/P1,n4/P2) -> CT(n1,n4,n3/P1,n2/P2)
! - D(n1,n2/P1,n3,n4/P2) -> DT(n1,n2/P1,n4,n3/P2)
! n1, n2, n3, n4 NOT REQUIRED to be divided evenly by NPES
!
USE pputils2
USE futils
IMPLICIT NONE
INCLUDE "mpif.h"
CHARACTER(len=32) :: file='ex4.h5'
INTEGER :: fid
!
INTEGER, PARAMETER :: ndims=2 ! N. of dims of proc. grid
INTEGER :: ierr, me, npes
INTEGER, DIMENSION(ndims) :: dims, coords
LOGICAL :: periods(ndims), reorder
INTEGER :: cart, cartcol, cartrow
!
INTEGER :: n1=8, n2=10, n3=6, n4=5, n1p, n2p, n3p, n4p, s1, s2, s3, s4
DOUBLE PRECISION, DIMENSION(:,:,:), ALLOCATABLE :: a3, a3t
DOUBLE PRECISION, DIMENSION(:,:,:,:), ALLOCATABLE :: b4, b4t, c4, c4t, d4, d4t
DOUBLE PRECISION :: x
INTEGER :: i, j, k, l, iglob, jglob, kglob, lglob, kerrors, nerrors
!================================================================================
!
! Init MPI
CALL mpi_init(ierr)
CALL mpi_comm_size(MPI_COMM_WORLD, npes, ierr)
CALL mpi_comm_rank(MPI_COMM_WORLD, me, ierr)
!
! Create cartesian topololy
dims = (/4, 3/)
periods = (/.FALSE., .TRUE./)
reorder = .FALSE.
IF( PRODUCT(dims) .NE. npes ) THEN
IF( me .EQ. 0 ) THEN
PRINT*, PRODUCT(dims), " processors required!"
CALL mpi_abort(MPI_COMM_WORLD, -1, ierr)
END IF
END IF
CALL mpi_cart_create(MPI_COMM_WORLD, ndims, dims, periods, reorder, cart, ierr)
CALL mpi_cart_coords(cart, me, ndims, coords, ierr)
CALL mpi_cart_sub(cart, (/.TRUE., .FALSE. /), cartcol, ierr)
CALL mpi_cart_sub(cart, (/.FALSE., .TRUE. /), cartrow, ierr)
!
! Define local array A3
CALL dist1d(cartcol, 0, n1, s1, n1p)
CALL dist1d(cartrow, 0, n2, s2, n2p)
CALL dist1d(cartrow, 0, n3, s3, n3p)
ALLOCATE( a3(n1p,n2,n3p), a3t(n1p,n3,n2p) )
a3 = 0
a3t = 0
DO i=1,n1p
iglob = s1 + i
DO j=1,n2
DO k=1,n3p
kglob = s3 + k
a3(i,j,k) = 10000*iglob + 100*j + kglob
END DO
END DO
END DO
IF( me .EQ. 0 ) THEN
WRITE(*,'(a,4i4)') 'Global dimension of matrix a', n1, n2, n3
END IF
!
! Tranpose A(n1/P1,n2,n3/P2) -> AT(n1/P1,n3,n2/P2)
CALL pptransp(cartrow, a3, a3t, 2, 3)
!
CALL mpi_barrier(MPI_COMM_WORLD, ierr)
!
! Check A3T
kerrors = 0
DO i=1,n1p
iglob = s1 + i
DO j=1,n2p
jglob = s2 + j
DO k=1,n3
x = 10000*iglob + 100*jglob + k
IF( x .NE. a3t(i,k,j) ) kerrors = kerrors+1
END DO
END DO
END DO
CALL mpi_reduce(kerrors, nerrors, 1, MPI_INTEGER, MPI_SUM, 0, &
& MPI_COMM_WORLD, ierr)
IF( me .EQ. 0 ) WRITE(*,'(a,i6)') 'nerrors checking a3', nerrors
!
! Define local array B4
CALL dist1d(cartcol, 0, n2, s2, n2p)
CALL dist1d(cartcol, 0, n3, s3, n3p)
CALL dist1d(cartrow, 0, n4, s4, n4p)
ALLOCATE( b4(n1,n2,n3p,n4p), b4t(n1,n3,n2p,n4p) )
b4 = 0
b4t = 0
DO i=1,n1
DO j=1,n2
DO k=1,n3p
kglob = s3 + k
DO l=1,n4p
lglob = s4 + l
b4(i,j,k,l) = 1000000*i + 10000*j + 100*kglob +lglob
END DO
END DO
END DO
END DO
IF( me .EQ. 0 ) THEN
WRITE(*,'(a,4i4)') 'Global dimension of matrix b', n1, n2, n3, n4
END IF
!
! Tranpose B(n1,n2,n3/P1,n4/P2) -> BT(n1,n3,n2/P1,n4/P2)
CALL pptransp(cartcol, b4, b4t, 2, 3)
!
CALL mpi_barrier(MPI_COMM_WORLD, ierr)
!
! Check B4T
kerrors = 0
DO i=1,n1
DO j=1,n2p
jglob = s2 + j
DO k=1,n3
DO l=1,n4p
lglob = s4 + l
x = 1000000*i + 10000*jglob + 100*k + lglob
IF( x .NE. b4t(i,k,j,l) ) kerrors = kerrors+1
END DO
END DO
END DO
END DO
CALL mpi_reduce(kerrors, nerrors, 1, MPI_INTEGER, MPI_SUM, 0, &
& MPI_COMM_WORLD, ierr)
IF( me .EQ. 0 ) WRITE(*,'(a,i6)') 'nerrors checking b4', nerrors
!
! Define local array C4
CALL dist1d(cartrow, 0, n2, s2, n2p)
CALL dist1d(cartcol, 0, n3, s3, n3p)
CALL dist1d(cartrow, 0, n4, s4, n4p)
ALLOCATE( c4(n1,n2,n3p,n4p), c4t(n1,n4,n3p,n2p) )
c4 = 0
c4t = 0
DO i=1,n1
DO j=1,n2
DO k=1,n3p
kglob = s3 + k
DO l=1,n4p
lglob = s4 + l
c4(i,j,k,l) = 1000000*i + 10000*j + 100*kglob +lglob
END DO
END DO
END DO
END DO
IF( me.EQ. 0 ) THEN
WRITE(*,'(a,4i4)') 'Global dimension of matrix c', n1, n2, n3, n4
END IF
!
! Tranpose C(n1,n2,n3/P1,n4/P2) -> CT(n1,n4,n3/P1,n2/P2)
CALL pptransp(cartrow, c4, c4t, 2, 4)
!
CALL mpi_barrier(MPI_COMM_WORLD, ierr)
!
! Check C4T
kerrors = 0
DO i=1,n1
DO j=1,n2p
jglob = s2 + j
DO k=1,n3p
kglob = s3 + k
DO l=1,n4
x = 1000000*i + 10000*jglob + 100*kglob + l
IF( x .NE. c4t(i,l,k,j) ) kerrors = kerrors+1
END DO
END DO
END DO
END DO
CALL mpi_reduce(kerrors, nerrors, 1, MPI_INTEGER, MPI_SUM, 0, &
& MPI_COMM_WORLD, ierr)
IF( me .EQ. 0 ) WRITE(*,'(a,i6)') 'nerrors checking c4', nerrors
!
! Define local array D4
CALL dist1d(cartcol, 0, n2, s2, n2p)
CALL dist1d(cartrow, 0, n3, s3, n3p)
CALL dist1d(cartrow, 0, n4, s4, n4p)
ALLOCATE( d4(n1,n2p,n3,n4p), d4t(n1,n2p,n4,n3p) )
d4 = 0
d4t = 0
DO i=1,n1
DO j=1,n2p
jglob = s2 + j
DO k=1,n3
DO l=1,n4p
lglob = s4 + l
d4(i,j,k,l) = 1000000*i + 10000*jglob + 100*k +lglob
END DO
END DO
END DO
END DO
IF( me.EQ. 0 ) THEN
WRITE(*,'(a,4i4)') 'Global dimension of matrix d', n1, n2, n3, n4
END IF
!
! Tranpose D(n1,n2/P1,n3,n4/P2) -> DT(n1,n2/P1,n4,n3/P2)
CALL pptransp(cartrow, d4, d4t, 3, 4)
!
CALL mpi_barrier(MPI_COMM_WORLD, ierr)
!
! Check D4T
kerrors = 0
DO i=1,n1
DO j=1,n2p
jglob = s2 + j
DO k=1,n3p
kglob = s3 + k
DO l=1,n4
x = 1000000*i + 10000*jglob + 100*kglob + l
IF( x .NE. d4t(i,j,l,k) ) kerrors = kerrors+1
END DO
END DO
END DO
END DO
CALL mpi_reduce(kerrors, nerrors, 1, MPI_INTEGER, MPI_SUM, 0, &
& MPI_COMM_WORLD, ierr)
IF( me .EQ. 0 ) WRITE(*,'(a,i6)') 'nerrors checking d4', nerrors
!
! Write to file
!
CALL creatf(file, fid, mpicomm=cart)
CALL putarrnd(fid, '/a3' , a3, (/1,3/) )
CALL putarrnd(fid, '/a3t', a3t,(/1,3/) )
CALL putarrnd(fid, '/b4' , b4, (/3,4/) )
CALL putarrnd(fid, '/b4t', b4t,(/3,4/) )
CALL putarrnd(fid, '/c4' , c4, (/3,4/) )
CALL putarrnd(fid, '/c4t', c4t,(/3,4/) )
CALL putarrnd(fid, '/d4' , d4, (/2,4/) )
CALL putarrnd(fid, '/d4t', d4t,(/2,4/) )
!
! Clean up and quit
DEALLOCATE(a3, a3t)
DEALLOCATE(b4, b4t)
DEALLOCATE(c4, c4t)
DEALLOCATE(d4, d4t)
CALL closef(fid)
CALL mpi_finalize(ierr)
END PROGRAM main
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