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! Copyright 2007, UCAR/Unidata. See netcdf/COPYRIGHT file for copying
! and redistribution conditions.
! This program tests io times with large files (> 4 GB) in
! netCDF-4. This is user-contributed code.
! $Id: tst_io.f90,v 1.7 2009/02/17 13:17:18 ed Exp $
program tst_io
use netcdf ! access to netcdf module
implicit none
integer, parameter :: prsz1 = 50, prsz2 = 50, &
prsz3 = 50, prsz4 = 50, repct = 10
integer :: i1, i2, i3, i4, j, k, ticksPerSec
real :: psr
integer :: clockRate
integer :: start, now, wrint1, ncint1, wrint2, ncint2, &
wrint3, ncint3, iosb, iosn, size
real, dimension (prsz1, prsz2, prsz3, prsz4) :: x
character(len = *), parameter :: nclFilenm1 = 'tst_io1.nc', &
nclFilenm2 = 'tst_io2.nc', nclFilenm3 = 'tst_io3.nc', &
nclFilenm4 = 'tst_io4.nc', nclFilenm5 = 'tst_io5.nc', &
nclFilenm6 = 'tst_io6.nc', nclFilenm7 = 'tst_io7.nc', &
nclFilenm8 = 'tst_io8.nc', nclFilenm9 = 'tst_io9.nc', &
nclFilenm10 = 'tst_io10.nc', nclFilenm11 = 'tst_io11.nc'
! needed for netcdf
integer :: ncid, x1id, x2id, x3id, x4id, vrid
integer :: vrids, vridt, vridu, vridv, vridw, vridx, vridy, vridz
psr = 1.7/real(prsz1)
print *, "Starting data initialization."
size = (prsz1 * prsz2 * prsz3 * prsz4 )/ 250000
do i1 = 1, prsz1
do i2 = 1, prsz2
do i3 = 1, prsz3 ! Jackson Pollock it is not
do i4 = 1, prsz4
x(i1, i2, i3, i4) = sin(i1*psr)*(0.5 + cos(i2*psr))+(psr/i3)+ i4/(10.0*prsz4)
enddo
enddo
enddo
enddo
call system_clock(start, ticksPerSec)
clockRate = 1000/ticksPerSec
print 5, size, 1000.0/real(ticksPerSec)
5 format("Array sizes =", i4, "MB. Clock resolution = ", f6.3, " ms."/)
! First the binary writes
call system_clock(start, ticksPerSec)
write(1, iostat = iosb) x
call system_clock(now)
wrint1 = now - start
call check (iosb, 1)
print 1, size, "MB","binary write = ", wrint1 * clockRate
1 format("Time for", i5, a, a26, i6, " msec. ")
call system_clock(start)
do i1 = 1, repct
rewind (2, iostat = iosb)
call check (iosb, 2)
write(2, iostat = iosb) x
call check (iosb, 3)
enddo
call system_clock(now)
wrint2 = now - start
call check (iosb, 4)
close(2, iostat = iosb)
call check (iosb, 5)
print 2, size, "MB", repct, " binary rewind/writes = ", wrint2 * clockRate
2 format("Time for", i5, a, i3, a23, i6," msec. ", a, i6)
close(1, iostat = iosb)
call system_clock(start)
write(13, iostat = iosb) x
call check (iosb, 6)
write(14, iostat = iosb) x
call check (iosb, 7)
write(15, iostat = iosb) x
call check (iosb, 8)
write(16, iostat = iosb) x
call check (iosb, 9)
write(17, iostat = iosb) x
call check (iosb, 10)
write(18, iostat = iosb) x
call check (iosb, 11)
write(19, iostat = iosb) x
call check (iosb, 12)
write(20, iostat = iosb) x
call check (iosb, 13)
call system_clock(now)
wrint3 = now - start
print 2, size, "MB", 8, " binary file writes = ", wrint3 * clockRate
do i1 = 1, 8
close(12 + i1, iostat = iosb)
call check (iosb, 14)
enddo
! Next the netCDF writes
call setupNetCDF (nclFilenm1, ncid, vrid, x, prsz1, prsz2, prsz3, prsz4, &
x1id, x2id, x3id, x4id, NF90_CLOBBER, 20)
call system_clock(start)
call check (NF90_PUT_VAR(ncid, vrid, x), 18)
call system_clock(now)
ncint1 = now - start
print 3, size, "MB"," netcdf write = ", ncint1 * clockRate, &
real(ncint1)/real (wrint1)
3 format("Time for", i5, a, a25, i7, " msec. Spd ratio = ", f5.2)
call check (NF90_CLOSE(ncid), 14)
call system_clock(start)
do i1 = 1, repct
call setupNetCDF (nclFilenm1, ncid, vrid, x, prsz1, prsz2, prsz3, prsz4, &
x1id, x2id, x3id, x4id, NF90_CLOBBER, 130)
call check (NF90_PUT_VAR(ncid, vrid, x), 23 + i1)
call check (NF90_CLOSE(ncid), 15)
enddo
call system_clock(now)
ncint2 = now - start
print 4, size, repct, " repeated netcdf writes = ", ncint2 * clockRate, &
real(ncint2)/real(wrint2);
4 format("Time for", i5, "MB", i3, a22, i7, " msec. Spd ratio = ", f5.2)
! call system_clock(start)
! call setupNetCDF (nclFilenm3, ncid, vrids, s, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 20)
! call setupNetCDF (nclFilenm4, ncid, vridt, t, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 30)
! call setupNetCDF (nclFilenm5, ncid, vridu, u, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 40)
! call setupNetCDF (nclFilenm6, ncid, vridv, v, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 50)
! call setupNetCDF (nclFilenm7, ncid, vridw, w, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 60)
! call setupNetCDF (nclFilenm8, ncid, vridx, x, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 70)
! call setupNetCDF (nclFilenm9, ncid, vridy, y, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 80)
! call setupNetCDF (nclFilenm10, ncid, vridz, z, prsz1, prsz2, prsz3, prsz4, &
! x1id, x2id, x3id, x4id, NF90_CLOBBER, 90)
! call check (NF90_PUT_VAR(ncid, vrids, s), 118)
! call check (NF90_PUT_VAR(ncid, vridt, t), 119)
! call check (NF90_PUT_VAR(ncid, vridu, u), 120)
! call check (NF90_PUT_VAR(ncid, vridv, v), 121)
! call check (NF90_PUT_VAR(ncid, vridw, w), 122)
! call check (NF90_PUT_VAR(ncid, vridx, x), 123)
! call check (NF90_PUT_VAR(ncid, vridy, y), 124)
! call check (NF90_PUT_VAR(ncid, vridz, z), 125)
! call system_clock(now)
! ncint3 = now - start
! call check (NF90_CLOSE(ncid), 16)
! print 4, size, 8, " netcdf file writes = ", ncint3 * clockRate, &
! real(ncint3)/real(wrint3);
contains
subroutine check (st, n) ! checks the return error code
integer, intent (in) :: st, n
if ((n < 10.and.st /= 0).or.(n > 10.and.st /= NF90_noerr))then
print *, "I/O error at", n, " status = ", st
stop 2
endif
end subroutine check
subroutine setupNetCDF(fn, nc, vr, vrnam, d1, d2, d3, d4, do1, do2, &
do3, do4, stat, deb)
integer, intent(in) :: d1, d2, d3, d4, stat, deb
integer, intent(out) :: do1, do2, do3, do4, vr
integer, intent(inout) :: nc
integer, dimension(4) :: dimids (4)
character(len = *), intent(in) :: fn
real, dimension (d1, d2, d3, d4), intent (in) :: vrnam
call check (NF90_CREATE (fn, stat, nc), deb + 1)
call check (NF90_DEF_DIM(nc, "d1", d1, do1), deb + 2)
call check (NF90_DEF_DIM(nc, "d2", d2, do2), deb + 3)
call check (NF90_DEF_DIM(nc, "d3", d3, do3), deb + 4)
call check (NF90_DEF_DIM(nc, "d4", d4, do4), deb + 5)
dimids = (/ do1, do2, do3, do4 /)
call check (NF90_DEF_VAR(nc, "data", NF90_REAL, dimids, vr), deb + 6)
call check (NF90_ENDDEF (nc), deb + 7)
end subroutine setupNetCDF
end program tst_io
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