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Bugfix for FIELDLINES restart feature #430

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02bd594
FIELDLINES: Implemented bugfix in restart as proposed by Pedro Pons-V…
Feb 15, 2026
6a63c90
Merge branch 'develop' into bugfix/FIELDLINES_restart
Feb 17, 2026
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55 changes: 29 additions & 26 deletions FIELDLINES/Sources/fieldlines_init_restart.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -40,43 +40,46 @@ SUBROUTINE fieldlines_init_restart
CALL read_scalar_hdf5(fid,'nr',ier,INTVAR=nr)
CALL read_scalar_hdf5(fid,'nphi',ier,INTVAR=nphi)
CALL read_scalar_hdf5(fid,'nz',ier,INTVAR=nz)
ALLOCATE(raxis(nr),phiaxis(nphi),zaxis(nz))
CALL close_hdf5(fid,ier)
end if
#endif
#if defined(MPI_OPT)
CALL MPI_BCAST(nr, 1, MPI_INTEGER, master, MPI_COMM_FIELDLINES, ierr_mpi)
CALL MPI_BCAST(nphi, 1, MPI_INTEGER, master, MPI_COMM_FIELDLINES, ierr_mpi)
CALL MPI_BCAST(nz, 1, MPI_INTEGER, master, MPI_COMM_FIELDLINES, ierr_mpi)
CALL mpialloc(raxis, nr, myid_sharmem, master, MPI_COMM_SHARMEM, win_raxis)
CALL mpialloc(phiaxis, nphi, myid_sharmem, master, MPI_COMM_SHARMEM, win_phiaxis)
CALL mpialloc(zaxis, nz, myid_sharmem, master, MPI_COMM_SHARMEM, win_zaxis)

CALL mpialloc(B_R, nr, nphi, nz, myid_sharmem, master, MPI_COMM_SHARMEM, win_B_R)
CALL mpialloc(B_PHI, nr, nphi, nz, myid_sharmem, master, MPI_COMM_SHARMEM, win_B_PHI)
CALL mpialloc(B_Z, nr, nphi, nz, myid_sharmem, master, MPI_COMM_SHARMEM, win_B_Z)
#endif
#if defined(LHDF5)
IF (myworkid == master) THEN
CALL open_hdf5(TRIM(restart_string),fid,ier)
CALL read_var_hdf5(fid,'raxis',nr,ier,DBLVAR=raxis)
CALL read_var_hdf5(fid,'phiaxis',nphi,ier,DBLVAR=phiaxis)
CALL read_var_hdf5(fid,'zaxis',nz,ier,DBLVAR=zaxis)
ALLOCATE(B_R(nr,nphi,nz),B_PHI(nr,nphi,nz),B_Z(nr,nphi,nz))
CALL read_var_hdf5(fid,'B_R',nr,nphi,nz,ier,DBLVAR=B_R)
CALL read_var_hdf5(fid,'B_PHI',nr,nphi,nz,ier,DBLVAR=B_PHI)
CALL read_var_hdf5(fid,'B_Z',nr,nphi,nz,ier,DBLVAR=B_Z)
CALL close_hdf5(fid,ier)
END IF
#endif

#if defined(MPI_OPT)
CALL MPI_BARRIER(MPI_COMM_FIELDLINES,ierr_mpi)
CALL MPI_BCAST(nr,1,MPI_INTEGER, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(nphi,1,MPI_INTEGER, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(nz,1,MPI_INTEGER, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
IF (myworkid /= master) THEN
ALLOCATE(raxis(nr), phiaxis(nphi), zaxis(nz), &
B_R(nr,nphi,nz), B_PHI(nr,nphi,nz), B_Z(nr,nphi,nz))
END IF
CALL MPI_BCAST(raxis,nr,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(phiaxis,nphi,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(zaxis,nz,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(B_R,nr*nphi*nz,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(B_PHI,nr*nphi*nz,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_BCAST(B_Z,nr*nphi*nz,MPI_REAL8, master, MPI_COMM_FIELDLINES,ierr_mpi)
IF (ierr_mpi /= MPI_SUCCESS) CALL handle_err(MPI_BCAST_ERR,'fieldlines_init_restart',ierr_mpi)
CALL MPI_WIN_SYNC(win_raxis, ierr_mpi)
CALL MPI_WIN_SYNC(win_phiaxis, ierr_mpi)
CALL MPI_WIN_SYNC(win_zaxis, ierr_mpi)
CALL MPI_WIN_SYNC(win_B_R, ierr_mpi)
CALL MPI_WIN_SYNC(win_B_PHI, ierr_mpi)
CALL MPI_WIN_SYNC(win_B_Z, ierr_mpi)

CALL MPI_BARRIER(MPI_COMM_SHARMEM, ierr_mpi)
#endif


rmin = MINVAL(raxis)
rmax = MAXVAL(raxis)
phimin = MINVAL(phiaxis)
Expand All @@ -94,4 +97,4 @@ SUBROUTINE fieldlines_init_restart
!-----------------------------------------------------------------------
! End Subroutine
!-----------------------------------------------------------------------
END SUBROUTINE fieldlines_init_restart
end subroutine fieldlines_init_restart