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bugfix: prevent segmentation fault 

need to rely on FFTWs calculation for amount of storage needed
This commit is contained in:
Martin Diehl 2022-05-27 00:14:00 +02:00
parent 19b78cb647
commit 064b9c5cc4
2 changed files with 17 additions and 10 deletions
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25
src/grid/spectral_utilities.f90
View File

@ -153,9 +153,8 @@ subroutine spectral_utilities_init()
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)
integer(C_INTPTR_T), dimension(3) :: cellsFFTW
integer(C_INTPTR_T) :: alloc_local, z, devNull
integer(C_INTPTR_T) :: N, z, devNull
integer(C_INTPTR_T), parameter :: &
scalarSize = 1_C_INTPTR_T, &
vectorSize = 3_C_INTPTR_T, &
tensorSize = 9_C_INTPTR_T
character(len=*), parameter :: &
@ -261,26 +260,34 @@ subroutine spectral_utilities_init()
print'(/,1x,a)', 'FFTW initialized'; flush(IO_STDOUT)
!--------------------------------------------------------------------------------------------------
! MPI allocation
cellsFFTW = int(cells,C_INTPTR_T)
alloc_local = fftw_mpi_local_size_3d(cellsFFTW(3), cellsFFTW(2), cellsFFTW(1)/2 +1, &
PETSC_COMM_WORLD, z, devNull)
! allocation
allocate (xi1st (3,cells1Red,cells(2),cells3),source = cmplx(0.0_pReal,0.0_pReal,pReal)) ! frequencies for first derivatives, only half the size for first dimension
allocate (xi2nd (3,cells1Red,cells(2),cells3),source = cmplx(0.0_pReal,0.0_pReal,pReal)) ! frequencies for second derivatives, only half the size for first dimension
tensorField = fftw_alloc_complex(tensorSize*alloc_local)
cellsFFTW = int(cells,C_INTPTR_T)
N = fftw_mpi_local_size_many(3,[cellsFFTW(3),cellsFFTW(2),cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T],&
tensorSize,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD,z,devNull)
if (z /= cells3) error stop 'domain decomposition mismatch (tensor)'
tensorField = fftw_alloc_complex(N)
call c_f_pointer(tensorField,tensorField_real, &
[3_C_INTPTR_T,3_C_INTPTR_T,2_C_INTPTR_T*(cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T),cellsFFTW(2),z])
call c_f_pointer(tensorField,tensorField_fourier, &
[3_C_INTPTR_T,3_C_INTPTR_T, cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T, cellsFFTW(2),z])
vectorField = fftw_alloc_complex(vectorSize*alloc_local)
N = fftw_mpi_local_size_many(3,[cellsFFTW(3),cellsFFTW(2),cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T],&
vectorSize,FFTW_MPI_DEFAULT_BLOCK,PETSC_COMM_WORLD,z,devNull)
if (z /= cells3) error stop 'domain decomposition mismatch (vector)'
vectorField = fftw_alloc_complex(N)
call c_f_pointer(vectorField,vectorField_real, &
[3_C_INTPTR_T,2_C_INTPTR_T*(cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T),cellsFFTW(2),z])
call c_f_pointer(vectorField,vectorField_fourier, &
[3_C_INTPTR_T, cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T, cellsFFTW(2),z])
scalarField = fftw_alloc_complex(scalarSize*alloc_local)
N = fftw_mpi_local_size_3d(cellsFFTW(3),cellsFFTW(2),cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T,&
PETSC_COMM_WORLD,z,devNull)
if (z /= cells3) error stop 'domain decomposition mismatch (scalar)'
scalarField = fftw_alloc_complex(N)
call c_f_pointer(scalarField,scalarField_real, &
[2_C_INTPTR_T*(cellsFFTW(1)/2_C_INTPTR_T+1_C_INTPTR_T),cellsFFTW(2),z])
call c_f_pointer(scalarField,scalarField_fourier, &

2
src/parallelization.f90
View File

@ -90,7 +90,7 @@ subroutine parallelization_init
#ifdef LOGFILE
write(rank_str,'(i4.4)') worldrank
open(OUTPUT_UNIT,file='out.'//rank_str,status='replace',encoding='UTF-8')
open(ERROR_UNIT,file='error.'//rank_str,status='replace',encoding='UTF-8')
open(ERROR_UNIT,file='err.'//rank_str,status='replace',encoding='UTF-8')
#else
if (worldrank /= 0) then
close(OUTPUT_UNIT) ! disable output