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preparing for use of transposed data in Fourier space

This commit is contained in:
Martin Diehl 2022-06-30 22:23:27 +02:00
parent 44ecedc7b0
commit fc76f9f60f
1 changed files with 17 additions and 11 deletions
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26
src/grid/spectral_utilities.f90
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@ -146,11 +146,15 @@ subroutine spectral_utilities_init()
FFTW_planner_flag
integer, dimension(3) :: k_s
type(C_PTR) :: &
tensorField, & !< field containing data for FFTW in real and fourier space (in place)
vectorField, & !< field containing data for FFTW in real space when debugging FFTW (no in place)
scalarField !< field containing data for FFTW in real space when debugging FFTW (no in place)
tensorField, & !< tensor data for FFTW in real and Fourier space (in-place)
vectorField, & !< vector data for FFTW in real and Fourier space (in-place)
scalarField !< scalar data for FFTW in real and Fourier space (in-place)
integer(C_INTPTR_T), dimension(3) :: cellsFFTW
integer(C_INTPTR_T) :: N, cells3FFTW, cells3_offset
integer(C_INTPTR_T) :: N, &
cells3FFTW, & !< # of cells in 3. dim on current process in real space
cells3_offset, & !< offset for cells in 3. dim on current process in real space
cells2FFTW, & !< # of cells in 2. dim on current process in Fourier space
cells2_offset !< offset for cells in 2. dim on curren process in Fourier space
integer(C_INTPTR_T), parameter :: &
vectorSize = 3_C_INTPTR_T, &
tensorSize = 9_C_INTPTR_T
@ -263,8 +267,9 @@ subroutine spectral_utilities_init()
cellsFFTW = int(cells,C_INTPTR_T)
N = fftw_mpi_local_size_many(3,[cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T)],&
tensorSize,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD,cells3FFTW,cells3_offset)
N = fftw_mpi_local_size_many_transposed(3,[cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T)], &
tensorSize,FFTW_MPI_DEFAULT_BLOCK,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD, &
cells3FFTW,cells3_offset,cells2FFTW,cells2_offset)
if (int(cells3FFTW) /= cells3) error stop 'domain decomposition mismatch (tensor)'
tensorField = fftw_alloc_complex(N)
call c_f_pointer(tensorField,tensorField_real, &
@ -272,8 +277,9 @@ subroutine spectral_utilities_init()
call c_f_pointer(tensorField,tensorField_fourier, &
[3_C_INTPTR_T,3_C_INTPTR_T,int(cells1Red, C_INTPTR_T),cellsFFTW(2),cells3FFTW])
N = fftw_mpi_local_size_many(3,[cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T)],&
vectorSize,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD,cells3FFTW,cells3_offset)
N = fftw_mpi_local_size_many_transposed(3,[cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T)], &
vectorSize,FFTW_MPI_DEFAULT_BLOCK,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD, &
cells3FFTW,cells3_offset,cells2FFTW,cells2_offset)
if (int(cells3FFTW) /= cells3) error stop 'domain decomposition mismatch (vector)'
vectorField = fftw_alloc_complex(N)
call c_f_pointer(vectorField,vectorField_real, &
@ -281,8 +287,8 @@ subroutine spectral_utilities_init()
call c_f_pointer(vectorField,vectorField_fourier, &
[3_C_INTPTR_T,int(cells1Red, C_INTPTR_T),cellsFFTW(2),cells3FFTW])
N = fftw_mpi_local_size_3d(cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T),&
PETSC_COMM_WORLD,cells3FFTW,cells3_offset)
N = fftw_mpi_local_size_3d_transposed(cellsFFTW(3),cellsFFTW(2),int(cells1Red,C_INTPTR_T), &
PETSC_COMM_WORLD,cells3FFTW,cells3_offset,cells2FFTW,cells2_offset)
if (int(cells3FFTW) /= cells3) error stop 'domain decomposition mismatch (scalar)'
scalarField = fftw_alloc_complex(N)
call c_f_pointer(scalarField,scalarField_real, &