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322 lines
12 KiB
Fortran
322 lines
12 KiB
Fortran
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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! Copyright by The HDF Group. *
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! Copyright by the Board of Trustees of the University of Illinois. *
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! All rights reserved. *
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! *
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! This file is part of HDF5. The full HDF5 copyright notice, including *
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! terms governing use, modification, and redistribution, is contained in *
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! the files COPYING and Copyright.html. COPYING can be found at the root *
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! of the source code distribution tree; Copyright.html can be found at the *
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! root level of an installed copy of the electronic HDF5 document set and *
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! is linked from the top-level documents page. It can also be found at *
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! http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
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! access to either file, you may request a copy from help@hdfgroup.org. *
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! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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!//////////////////////////////////////////////////////////
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! writes/reads dataset by hyperslabs
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!//////////////////////////////////////////////////////////
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subroutine multiple_dset_write(lenght,do_collective,do_chunk,nerrors)
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use hdf5
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implicit none
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include 'mpif.h'
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integer, intent(in) :: lenght ! array lenght
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logical, intent(in) :: do_collective ! use collective I/O
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logical, intent(in) :: do_chunk ! use chunking
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integer, intent(inout) :: nerrors ! number of errors
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integer :: mpierror ! MPI hdferror flag
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integer :: hdferror ! HDF hdferror flag
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integer :: mpi_size ! number of processes in the group of communicator
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integer :: mpi_rank ! rank of the calling process in the communicator
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integer(hsize_t), dimension(1) :: dims ! dataset dimensions
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integer(hsize_t), dimension(1) :: cdims ! chunk dimensions
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integer, allocatable :: wbuf(:) ! write buffer
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integer, allocatable :: rbuf(:) ! read buffer
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integer(hsize_t), dimension(1) :: counti ! hyperslab selection
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integer(hsize_t), dimension(1) :: start ! hyperslab selection
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integer(hid_t) :: fapl_id ! file access identifier
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integer(hid_t) :: dxpl_id ! dataset transfer property list
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integer(hid_t) :: dcpl_id ! dataset creation property list
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integer(hid_t) :: file_id ! file identifier
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integer(hid_t) :: dset_id ! dataset identifier
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integer(hid_t) :: fspace_id ! file space identifier
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integer(hid_t) :: mspace_id ! memory space identifier
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integer(hid_t) :: driver_id ! low-level file driver identifier
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integer :: istart ! start position in array
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integer :: iend ! end position in array
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integer :: icount ! number of elements in array
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character(len=80) :: filename ! filename
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character(len=80) :: dsetname ! dataset name
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integer :: n, i
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call mpi_comm_rank( MPI_COMM_WORLD, mpi_rank, mpierror )
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call mpi_comm_size( MPI_COMM_WORLD, mpi_size, mpierror )
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!//////////////////////////////////////////////////////////
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! initialize the array data between the processes (3)
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! for the 12 size array we get
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! p0 = 1,2,3,4
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! p1 = 5,6,7,8
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! p2 = 9,10,11,12
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!//////////////////////////////////////////////////////////
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allocate(wbuf(0:lenght-1),stat=hdferror)
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if (hdferror /= 0) then
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write(*,*) 'allocate error'
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return
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endif
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allocate(rbuf(0:lenght-1),stat=hdferror)
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if (hdferror /= 0) then
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write(*,*) 'allocate error'
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return
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endif
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icount = lenght/mpi_size ! divide the array by the number of processes
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istart = mpi_rank*icount ! start position
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iend = istart + icount ! end position
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!//////////////////////////////////////////////////////////
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! HDF5 I/O
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!//////////////////////////////////////////////////////////
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dims(1) = lenght
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cdims(1) = lenght/mpi_size ! define chunks as the number of processes
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!//////////////////////////////////////////////////////////
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! setup file access property list with parallel I/O access
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!//////////////////////////////////////////////////////////
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call h5pcreate_f(H5P_FILE_ACCESS_F, fapl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5pset_fapl_mpio_f(fapl_id, MPI_COMM_WORLD, MPI_INFO_NULL, hdferror)
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call check("h5pset_fapl_mpio_f", hdferror, nerrors)
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call h5pget_driver_f(fapl_id, driver_id, hdferror)
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call check("h5pget_driver_f", hdferror, nerrors)
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if( driver_id /= H5FD_MPIO_F) then
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write(*,*) "Wrong driver information returned"
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nerrors = nerrors + 1
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endif
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!//////////////////////////////////////////////////////////
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! create the file collectively
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!//////////////////////////////////////////////////////////
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call h5_fixname_f("parf2", filename, fapl_id, hdferror)
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call h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, hdferror, access_prp = fapl_id)
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call check("h5fcreate_f", hdferror, nerrors)
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call h5screate_simple_f(1, dims, fspace_id, hdferror)
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call check("h5screate_simple_f", hdferror, nerrors)
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call h5screate_simple_f(1, dims, mspace_id, hdferror)
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call check("h5screate_simple_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! modify dataset creation properties to enable chunking
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!//////////////////////////////////////////////////////////
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call h5pcreate_f(H5P_DATASET_CREATE_F, dcpl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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if (do_chunk) then
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call h5pset_chunk_f(dcpl_id, 1, cdims, hdferror)
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call check("h5pset_chunk_f", hdferror, nerrors)
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endif
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!//////////////////////////////////////////////////////////
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! create a property list for collective dataset write
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!//////////////////////////////////////////////////////////
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call h5pcreate_f(H5P_DATASET_XFER_F, dxpl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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if (do_collective) then
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call h5pset_dxpl_mpio_f(dxpl_id, H5FD_MPIO_COLLECTIVE_F, hdferror)
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call check("h5pset_dxpl_mpio_f", hdferror, nerrors)
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endif
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!//////////////////////////////////////////////////////////
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! define hyperslab
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!//////////////////////////////////////////////////////////
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counti(1) = icount
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start(1) = istart
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!//////////////////////////////////////////////////////////
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! select hyperslab in memory
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!//////////////////////////////////////////////////////////
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call h5sselect_hyperslab_f(mspace_id, H5S_SELECT_SET_F, start, counti, hdferror)
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call check("h5sselect_hyperslab_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! select hyperslab in the file
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!//////////////////////////////////////////////////////////
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call h5sselect_hyperslab_f(fspace_id, H5S_SELECT_SET_F, start, counti, hdferror)
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call check("h5sselect_hyperslab_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! create and write the datasets
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!//////////////////////////////////////////////////////////
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do n = 1, 300
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! direct the output of the write statement to unit "dsetname"
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write(dsetname,*) 'dataset', n
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! create this dataset
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call h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, fspace_id, dset_id, hdferror, dcpl_id)
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call check("h5dcreate_f", hdferror, nerrors)
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do i = istart, iend-1
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wbuf(i) = n + mpi_rank
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enddo
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! write this dataset
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call h5dwrite_f(dset_id,H5T_NATIVE_INTEGER,wbuf,dims,hdferror,file_space_id=fspace_id,mem_space_id=mspace_id,xfer_prp=dxpl_id)
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call check("h5dwrite_f", hdferror, nerrors)
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! close this dataset
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call h5dclose_f(dset_id, hdferror)
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call check("h5dclose_f", hdferror, nerrors)
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enddo
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!//////////////////////////////////////////////////////////
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! close HDF5 I/O
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!//////////////////////////////////////////////////////////
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call h5pclose_f(fapl_id, hdferror)
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call check("h5pclose_f", hdferror, nerrors)
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call h5pclose_f(dcpl_id, hdferror)
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call check("h5pclose_f", hdferror, nerrors)
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call h5pclose_f(dxpl_id, hdferror)
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call check("h5pclose_f", hdferror, nerrors)
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call h5sclose_f(mspace_id, hdferror)
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call check("h5sclose_f", hdferror, nerrors)
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call h5sclose_f(fspace_id, hdferror)
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call check("h5sclose_f", hdferror, nerrors)
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call h5fclose_f(file_id, hdferror)
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call check("h5fclose_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! reopen file with read access
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!//////////////////////////////////////////////////////////
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call h5pcreate_f(H5P_FILE_ACCESS_F, fapl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5pset_fapl_mpio_f(fapl_id, MPI_COMM_WORLD, MPI_INFO_NULL, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5fopen_f(filename, H5F_ACC_RDWR_F, file_id, hdferror, access_prp = fapl_id)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5screate_simple_f(1, dims, fspace_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5screate_simple_f(1, dims, mspace_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! select hyperslab in memory
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!//////////////////////////////////////////////////////////
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call h5sselect_hyperslab_f(mspace_id, H5S_SELECT_SET_F, start, counti, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! select hyperslab in the file
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!//////////////////////////////////////////////////////////
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call h5sselect_hyperslab_f(fspace_id, H5S_SELECT_SET_F, start, counti, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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!//////////////////////////////////////////////////////////
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! create a property list for collective dataset read
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!//////////////////////////////////////////////////////////
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call h5pcreate_f(H5P_DATASET_XFER_F, dxpl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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if (do_collective) then
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call h5pset_dxpl_mpio_f(dxpl_id, H5FD_MPIO_COLLECTIVE_F, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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endif
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!//////////////////////////////////////////////////////////
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! read dataset
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!//////////////////////////////////////////////////////////
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do n = 1, 300
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! direct the output of the write statement to unit "dsetname"
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write(dsetname,*) 'dataset', n
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! create this dataset
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call h5dopen_f(file_id, dsetname, dset_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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! read this dataset
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call h5dread_f(dset_id,H5T_NATIVE_INTEGER,rbuf,dims,hdferror,file_space_id=fspace_id,mem_space_id=mspace_id,xfer_prp=dxpl_id)
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call check("h5pcreate_f", hdferror, nerrors)
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! close this dataset
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call h5dclose_f(dset_id, hdferror)
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call check("h5dclose_f", hdferror, nerrors)
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do i = istart, iend-1
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wbuf(i) = n + mpi_rank
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enddo
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! compare read and write data. each process compares a subset of the array
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do i = istart, iend-1
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if( wbuf(i) /= rbuf(i)) then
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write(*,*) 'buffers differs at ', i, rbuf(i), wbuf(i)
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nerrors = nerrors + 1
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endif
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enddo
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enddo
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!//////////////////////////////////////////////////////////
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! close HDF5 I/O
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!//////////////////////////////////////////////////////////
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call h5pclose_f(fapl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5pclose_f(dxpl_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5sclose_f(fspace_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5sclose_f(mspace_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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call h5fclose_f(file_id, hdferror)
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call check("h5pcreate_f", hdferror, nerrors)
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deallocate(wbuf)
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deallocate(rbuf)
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end subroutine multiple_dset_write
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