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mirror of https://github.com/QuantumPackage/qp2.git synced 2024-07-19 09:13:26 +02:00
qp2/src/mpi/mpi.irp.f
2019-01-25 11:39:31 +01:00

110 lines
2.4 KiB
Fortran

BEGIN_PROVIDER [ logical, mpi_initialized ]
implicit none
BEGIN_DOC
! Always true. Initialized MPI
END_DOC
IRP_IF MPI
include 'mpif.h'
integer :: ierr
call mpi_init(ierr)
if (ierr /= MPI_SUCCESS) then
print *, 'ierr = ', ierr
stop 'Unable to initialize MPI'
endif
IRP_ENDIF
mpi_initialized = .True.
END_PROVIDER
BEGIN_PROVIDER [ integer, mpi_rank ]
&BEGIN_PROVIDER [ integer, mpi_size ]
implicit none
BEGIN_DOC
! Rank of MPI process and number of MPI processes
END_DOC
IRP_IF MPI
include 'mpif.h'
PROVIDE mpi_initialized
integer :: ierr
call MPI_COMM_RANK (MPI_COMM_WORLD, mpi_rank, ierr)
if (ierr /= MPI_SUCCESS) then
print *, 'ierr = ', ierr
stop 'Unable to get MPI rank'
endif
call MPI_COMM_SIZE (MPI_COMM_WORLD, mpi_size, ierr)
if (ierr /= MPI_SUCCESS) then
print *, 'ierr = ', ierr
stop 'Unable to get MPI size'
endif
IRP_ELSE
mpi_rank = 0
mpi_size = 1
IRP_ENDIF
ASSERT (mpi_rank >= 0)
ASSERT (mpi_rank < mpi_size)
END_PROVIDER
BEGIN_PROVIDER [ logical, mpi_master ]
implicit none
BEGIN_DOC
! If true, rank is zero
END_DOC
mpi_master = (mpi_rank == 0)
if (mpi_master.and.(mpi_size > 1)) then
print *, 'MPI size: ', mpi_size
endif
END_PROVIDER
BEGIN_TEMPLATE
subroutine broadcast_chunks_$double(A, LDA)
implicit none
integer*8, intent(in) :: LDA
$type, intent(inout) :: A(LDA)
BEGIN_DOC
! Broadcast with chunks of ~2GB
END_DOC
IRP_IF MPI_DEBUG
print *, irp_here, mpi_rank
call MPI_BARRIER(MPI_COMM_WORLD, ierr)
IRP_ENDIF
IRP_IF MPI
include 'mpif.h'
integer :: i, sze, ierr
do i=1,LDA,200000000/$8
sze = min(LDA-i+1, 200000000/$8)
call MPI_BCAST (A(i), sze, MPI_$DOUBLE_PRECISION, 0, MPI_COMM_WORLD, ierr)
if (ierr /= MPI_SUCCESS) then
print *, irp_here//': Unable to broadcast chunks $double ', i
stop -1
endif
call MPI_BARRIER(MPI_COMM_WORLD,ierr)
enddo
IRP_ENDIF
end
SUBST [ double, type, 8, DOUBLE_PRECISION ]
double ; double precision ; 8 ; DOUBLE_PRECISION ;;
integer ; integer ; 4 ; INTEGER ;;
integer8 ; integer*8 ; 8 ; INTEGER8 ;;
END_TEMPLATE
subroutine mpi_print(string)
implicit none
BEGIN_DOC
! Print string to stdout if the MPI rank is zero.
END_DOC
character*(*) :: string
if (mpi_master) then
print *, string
endif
end