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200 lines
7.5 KiB
Fortran
200 lines
7.5 KiB
Fortran
! This is part of the netCDF package.
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! Copyright 2006 University Corporation for Atmospheric Research/Unidata.
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! See COPYRIGHT file for conditions of use.
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! This program tests netCDF-4 parallel I/O and fill values from
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! fortran. It creates a file like this:
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! netcdf f90tst_parallel3 {
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! dimensions:
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! x = 16 ;
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! y = 16 ;
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! variables:
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! byte byte(x, y) ;
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! short short(x, y) ;
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! int int(x, y) ;
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! float float(x, y) ;
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! double double(x, y) ;
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! ubyte ubyte(x, y) ;
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! ushort ushort(x, y) ;
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! uint uint(x, y) ;
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! $Id: f90tst_parallel3.f90,v 1.5 2010/05/25 13:53:04 ed Exp $
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program f90tst_parallel3
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use typeSizes
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use netcdf
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implicit none
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include 'mpif.h'
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! This is the name of the data file we will create.
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character (len = *), parameter :: FILE_NAME = "f90tst_parallel3.nc"
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integer, parameter :: MAX_DIMS = 2
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integer, parameter :: NX = 16, NY = 16
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integer, parameter :: HALF_NX = NX/2, HALF_NY = NY/2
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integer, parameter :: NUM_PROC = 4
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integer, parameter :: NUM_VARS = 8
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integer, parameter :: CACHE_SIZE = 4194304, CACHE_NELEMS = 1013
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integer, parameter :: CACHE_PREEMPTION = 79
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character (len = *), parameter :: var_name(NUM_VARS) = &
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(/ 'byte__', 'short_', 'int___', 'float_', 'double', 'ubyte_', 'ushort', 'uint__' /)
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integer :: ncid, varid(NUM_VARS), dimids(MAX_DIMS)
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integer :: var_type(NUM_VARS) = (/ nf90_byte, nf90_short, nf90_int, &
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nf90_float, nf90_double, nf90_ubyte, nf90_ushort, nf90_uint /)
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integer :: x_dimid, y_dimid
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integer :: byte_out(HALF_NY, HALF_NX), byte_in(HALF_NY, HALF_NX)
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integer :: short_out(HALF_NY, HALF_NX), short_in(HALF_NY, HALF_NX)
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integer :: int_out(HALF_NY, HALF_NX), int_in(HALF_NY, HALF_NX)
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real :: areal_out(HALF_NY, HALF_NX), areal_in(HALF_NY, HALF_NX)
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real :: double_out(HALF_NY, HALF_NX), double_in(HALF_NY, HALF_NX)
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integer :: ubyte_out(HALF_NY, HALF_NX), ubyte_in(HALF_NY, HALF_NX)
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integer :: ushort_out(HALF_NY, HALF_NX), ushort_in(HALF_NY, HALF_NX)
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integer (kind = EightByteInt) :: uint_out(HALF_NY, HALF_NX), uint_in(HALF_NY, HALF_NX)
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integer :: nvars, ngatts, ndims, unlimdimid, file_format
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integer :: x, y, v
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integer :: p, my_rank, ierr
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integer :: start(MAX_DIMS), count(MAX_DIMS)
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call MPI_Init(ierr)
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call MPI_Comm_rank(MPI_COMM_WORLD, my_rank, ierr)
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call MPI_Comm_size(MPI_COMM_WORLD, p, ierr)
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if (my_rank .eq. 0) then
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print *, ' '
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print *, '*** Testing netCDF-4 parallel I/O with fill values.'
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endif
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! There must be 4 procs for this test.
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if (p .ne. 4) then
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print *, 'Sorry, this test program must be run on four processors.'
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stop 1
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endif
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! Create some pretend data.
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do x = 1, HALF_NX
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do y = 1, HALF_NY
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byte_out(y, x) = my_rank * (-1)
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short_out(y, x) = my_rank * (-2)
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int_out(y, x) = my_rank * (-4)
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areal_out(y, x) = my_rank * 2.5
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double_out(y, x) = my_rank * (-4.5)
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ubyte_out(y, x) = my_rank
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ushort_out(y, x) = my_rank * 2
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uint_out(y, x) = my_rank * 4
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end do
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end do
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! Create the netCDF file.
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call check(nf90_create(FILE_NAME, IOR(nf90_netcdf4, nf90_mpiposix), ncid, &
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comm = MPI_COMM_WORLD, info = MPI_INFO_NULL, cache_size = CACHE_SIZE, &
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cache_nelems = CACHE_NELEMS, cache_preemption = CACHE_PREEMPTION))
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! Define the dimensions.
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call check(nf90_def_dim(ncid, "x", NX, x_dimid))
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call check(nf90_def_dim(ncid, "y", NY, y_dimid))
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dimids = (/ y_dimid, x_dimid /)
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! Define the variables.
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do v = 1, NUM_VARS
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call check(nf90_def_var(ncid, var_name(v), var_type(v), dimids, varid(v)))
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end do
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! This will be the last collective operation.
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call check(nf90_enddef(ncid))
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! Determine what part of the variable will be written/read for this
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! processor. It's a checkerboard decomposition.
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count = (/ HALF_NX, HALF_NY /)
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if (my_rank .eq. 0) then
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start = (/ 1, 1 /)
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else if (my_rank .eq. 1) then
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start = (/ HALF_NX + 1, 1 /)
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else if (my_rank .eq. 2) then
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start = (/ 1, HALF_NY + 1 /)
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else if (my_rank .eq. 3) then
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start = (/ HALF_NX + 1, HALF_NY + 1 /)
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endif
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! Write this processor's data, except for processor zero.
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if (my_rank .ne. 0) then
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call check(nf90_put_var(ncid, varid(1), byte_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(2), short_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(3), int_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(4), areal_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(5), double_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(6), ubyte_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(7), ushort_out, start = start, count = count))
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call check(nf90_put_var(ncid, varid(8), uint_out, start = start, count = count))
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endif
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! Close the file.
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call check(nf90_close(ncid))
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! Reopen the file.
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call check(nf90_open(FILE_NAME, IOR(nf90_nowrite, nf90_mpiio), ncid, &
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comm = MPI_COMM_WORLD, info = MPI_INFO_NULL))
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! Check some stuff out.
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call check(nf90_inquire(ncid, ndims, nvars, ngatts, unlimdimid, file_format))
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if (ndims /= 2 .or. nvars /= NUM_VARS .or. ngatts /= 0 .or. unlimdimid /= -1 .or. &
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file_format /= nf90_format_netcdf4) stop 2
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! Read this processor's data.
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call check(nf90_get_var(ncid, varid(1), byte_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(2), short_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(3), int_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(4), areal_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(5), double_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(6), ubyte_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(7), ushort_in, start = start, count = count))
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call check(nf90_get_var(ncid, varid(8), uint_in, start = start, count = count))
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! Check the data. All the data from the processor zero are fill
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! value.
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do x = 1, HALF_NX
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do y = 1, HALF_NY
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if (my_rank .eq. 0) then
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if (byte_in(y, x) .ne. nf90_fill_byte) stop 3
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if (short_in(y, x) .ne. nf90_fill_short) stop 4
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if (int_in(y, x) .ne. nf90_fill_int) stop 5
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if (areal_in(y, x) .ne. nf90_fill_real) stop 6
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if (double_in(y, x) .ne. nf90_fill_double) stop 7
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if (ubyte_in(y, x) .ne. nf90_fill_ubyte) stop 8
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if (ushort_in(y, x) .ne. nf90_fill_ushort) stop 9
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if (uint_in(y, x) .ne. nf90_fill_uint) stop 10
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else
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if (byte_in(y, x) .ne. (my_rank * (-1))) stop 13
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if (short_in(y, x) .ne. (my_rank * (-2))) stop 14
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if (int_in(y, x) .ne. (my_rank * (-4))) stop 15
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if (areal_in(y, x) .ne. (my_rank * (2.5))) stop 16
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if (double_in(y, x) .ne. (my_rank * (-4.5))) stop 17
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if (ubyte_in(y, x) .ne. (my_rank * (1))) stop 18
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if (ushort_in(y, x) .ne. (my_rank * (2))) stop 19
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if (uint_in(y, x) .ne. (my_rank * (4))) stop 20
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endif
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end do
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end do
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! Close the file.
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call check(nf90_close(ncid))
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call MPI_Finalize(ierr)
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if (my_rank .eq. 0) print *,'*** SUCCESS!'
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contains
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! This subroutine handles errors by printing an error message and
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! exiting with a non-zero status.
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subroutine check(errcode)
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use netcdf
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implicit none
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integer, intent(in) :: errcode
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if(errcode /= nf90_noerr) then
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print *, 'Error: ', trim(nf90_strerror(errcode))
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stop 99
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endif
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end subroutine check
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end program f90tst_parallel3
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