diff options
Diffstat (limited to 'Source/FieldSolver')
| -rw-r--r-- | Source/FieldSolver/WarpXFFT.cpp | 173 |
1 files changed, 81 insertions, 92 deletions
diff --git a/Source/FieldSolver/WarpXFFT.cpp b/Source/FieldSolver/WarpXFFT.cpp index 13d92f6f3..e5105a4b3 100644 --- a/Source/FieldSolver/WarpXFFT.cpp +++ b/Source/FieldSolver/WarpXFFT.cpp @@ -90,7 +90,7 @@ CopyDataFromFFTToValid (MultiFab& mf, const MultiFab& mf_fft, const BoxArray& ba const FArrayBox& srcfab = mf_fft[mfi]; const Box& srcbox = srcfab.box(); - + if (srcbox.contains(bx)) { // Copy the interior region (without guard cells) @@ -109,7 +109,7 @@ CopyDataFromFFTToValid (MultiFab& mf, const MultiFab& mf_fft, const BoxArray& ba mf.setVal(0.0, 0); mf.ParallelAdd(mftmp); - + } } @@ -129,19 +129,6 @@ WarpX::AllocLevelDataFFT (int lev) FFTDomainDecomposition(lev, ba_fp_fft, dm_fp_fft, ba_valid_fp_fft[lev], domain_fp_fft[lev], geom[lev].Domain()); - if (fft_hybrid_mpi_decomposition == false){ - // Allocate and initialize objects for the spectral solver - // (all use the same distribution mapping) - std::array<Real,3> dx = CellSize(lev); -#if (AMREX_SPACEDIM == 3) - RealVect dx_vect(dx[0], dx[1], dx[2]); -#elif (AMREX_SPACEDIM == 2) - RealVect dx_vect(dx[0], dx[2]); -#endif - spectral_solver_fp[lev].reset( new SpectralSolver( ba_fp_fft, dm_fp_fft, - nox_fft, noy_fft, noz_fft, do_nodal, dx_vect, dt[lev] ) ); - } - // rho2 has one extra ghost cell, so that it's safe to deposit charge density after // pushing particle. @@ -383,13 +370,48 @@ WarpX::PushPSATD (amrex::Real a_dt) { for (int lev = 0; lev <= finest_level; ++lev) { AMREX_ALWAYS_ASSERT_WITH_MESSAGE(dt[lev] == a_dt, "dt must be consistent"); - PushPSATD(lev, a_dt); + if (fft_hybrid_mpi_decomposition){ + PushPSATD_hybridFFT(lev, a_dt); + } else { + PushPSATD_localFFT(lev, a_dt); + } } } +void WarpX::PushPSATD_localFFT (int lev, amrex::Real /* dt */) +{ + auto& solver = *spectral_solver_fp[lev]; + + // Perform forward Fourier transform + solver.ForwardTransform(*Efield_fp[lev][0], SpectralFieldIndex::Ex); + solver.ForwardTransform(*Efield_fp[lev][1], SpectralFieldIndex::Ey); + solver.ForwardTransform(*Efield_fp[lev][2], SpectralFieldIndex::Ez); + solver.ForwardTransform(*Bfield_fp[lev][0], SpectralFieldIndex::Bx); + solver.ForwardTransform(*Bfield_fp[lev][1], SpectralFieldIndex::By); + solver.ForwardTransform(*Bfield_fp[lev][2], SpectralFieldIndex::Bz); + solver.ForwardTransform(*current_fp[lev][0], SpectralFieldIndex::Jx); + solver.ForwardTransform(*current_fp[lev][1], SpectralFieldIndex::Jy); + solver.ForwardTransform(*current_fp[lev][2], SpectralFieldIndex::Jz); + solver.ForwardTransform(*rho_fp[lev], SpectralFieldIndex::rho_old, 0); + solver.ForwardTransform(*rho_fp[lev], SpectralFieldIndex::rho_new, 1); + + // Advance fields in spectral space + solver.pushSpectralFields(); + + // Perform backward Fourier Transform + solver.BackwardTransform(*Efield_fp[lev][0], SpectralFieldIndex::Ex); + solver.BackwardTransform(*Efield_fp[lev][1], SpectralFieldIndex::Ey); + solver.BackwardTransform(*Efield_fp[lev][2], SpectralFieldIndex::Ez); + solver.BackwardTransform(*Bfield_fp[lev][0], SpectralFieldIndex::Bx); + solver.BackwardTransform(*Bfield_fp[lev][1], SpectralFieldIndex::By); + solver.BackwardTransform(*Bfield_fp[lev][2], SpectralFieldIndex::Bz); +} + void -WarpX::PushPSATD (int lev, amrex::Real /* dt */) +WarpX::PushPSATD_hybridFFT (int lev, amrex::Real /* dt */) { +#ifndef AMREX_USE_CUDA // Running on CPU ; use PICSAR code for the hybrid FFT + BL_PROFILE_VAR_NS("WarpXFFT::CopyDualGrid", blp_copy); BL_PROFILE_VAR_NS("PICSAR::FftPushEB", blp_push_eb); @@ -409,79 +431,45 @@ WarpX::PushPSATD (int lev, amrex::Real /* dt */) BL_PROFILE_VAR_STOP(blp_copy); BL_PROFILE_VAR_START(blp_push_eb); - if (fft_hybrid_mpi_decomposition){ -#ifndef AMREX_USE_CUDA // When running on CPU: use PICSAR code - if (Efield_fp_fft[lev][0]->local_size() == 1) - //Only one FFT patch on this MPI - { - for (MFIter mfi(*Efield_fp_fft[lev][0]); mfi.isValid(); ++mfi) - { - warpx_fft_push_eb(WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][0])[mfi]), - WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][1])[mfi]), - WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][2])[mfi]), - WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][0])[mfi]), - WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][1])[mfi]), - WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][2])[mfi]), - WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][0])[mfi]), - WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][1])[mfi]), - WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][2])[mfi]), - WARPX_TO_FORTRAN_N_ANYD((*rho_fp_fft[lev])[mfi],0), - WARPX_TO_FORTRAN_N_ANYD((*rho_fp_fft[lev])[mfi],1)); - } - } - else if (Efield_fp_fft[lev][0]->local_size() == 0) - // No FFT patch on this MPI rank - // Still need to call the MPI-FFT routine. - { - FArrayBox fab(Box(IntVect::TheZeroVector(), IntVect::TheUnitVector())); - warpx_fft_push_eb(WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab), - WARPX_TO_FORTRAN_ANYD(fab)); - } - else - // Multiple FFT patches on this MPI rank - { - amrex::Abort("WarpX::PushPSATD: TODO"); - } -#else // AMREX_USE_CUDA is defined ; running on GPU - amrex::Abort("The option `psatd.fft_hybrid_mpi_decomposition` does not work on GPU."); -#endif - } else { - // Not using the hybrid decomposition - auto& solver = *spectral_solver_fp[lev]; - - // Perform forward Fourier transform - solver.ForwardTransform(*Efield_fp_fft[lev][0], SpectralFieldIndex::Ex); - solver.ForwardTransform(*Efield_fp_fft[lev][1], SpectralFieldIndex::Ey); - solver.ForwardTransform(*Efield_fp_fft[lev][2], SpectralFieldIndex::Ez); - solver.ForwardTransform(*Bfield_fp_fft[lev][0], SpectralFieldIndex::Bx); - solver.ForwardTransform(*Bfield_fp_fft[lev][1], SpectralFieldIndex::By); - solver.ForwardTransform(*Bfield_fp_fft[lev][2], SpectralFieldIndex::Bz); - solver.ForwardTransform(*current_fp_fft[lev][0], SpectralFieldIndex::Jx); - solver.ForwardTransform(*current_fp_fft[lev][1], SpectralFieldIndex::Jy); - solver.ForwardTransform(*current_fp_fft[lev][2], SpectralFieldIndex::Jz); - solver.ForwardTransform(*rho_fp_fft[lev], SpectralFieldIndex::rho_old, 0); - solver.ForwardTransform(*rho_fp_fft[lev], SpectralFieldIndex::rho_new, 1); - - // Advance fields in spectral space - solver.pushSpectralFields(); - - // Perform backward Fourier Transform - solver.BackwardTransform(*Efield_fp_fft[lev][0], SpectralFieldIndex::Ex); - solver.BackwardTransform(*Efield_fp_fft[lev][1], SpectralFieldIndex::Ey); - solver.BackwardTransform(*Efield_fp_fft[lev][2], SpectralFieldIndex::Ez); - solver.BackwardTransform(*Bfield_fp_fft[lev][0], SpectralFieldIndex::Bx); - solver.BackwardTransform(*Bfield_fp_fft[lev][1], SpectralFieldIndex::By); - solver.BackwardTransform(*Bfield_fp_fft[lev][2], SpectralFieldIndex::Bz); - + if (Efield_fp_fft[lev][0]->local_size() == 1) + //Only one FFT patch on this MPI + { + for (MFIter mfi(*Efield_fp_fft[lev][0]); mfi.isValid(); ++mfi) + { + warpx_fft_push_eb(WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][0])[mfi]), + WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][1])[mfi]), + WARPX_TO_FORTRAN_ANYD((*Efield_fp_fft[lev][2])[mfi]), + WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][0])[mfi]), + WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][1])[mfi]), + WARPX_TO_FORTRAN_ANYD((*Bfield_fp_fft[lev][2])[mfi]), + WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][0])[mfi]), + WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][1])[mfi]), + WARPX_TO_FORTRAN_ANYD((*current_fp_fft[lev][2])[mfi]), + WARPX_TO_FORTRAN_N_ANYD((*rho_fp_fft[lev])[mfi],0), + WARPX_TO_FORTRAN_N_ANYD((*rho_fp_fft[lev])[mfi],1)); + } + } + else if (Efield_fp_fft[lev][0]->local_size() == 0) + // No FFT patch on this MPI rank + // Still need to call the MPI-FFT routine. + { + FArrayBox fab(Box(IntVect::TheZeroVector(), IntVect::TheUnitVector())); + warpx_fft_push_eb(WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab), + WARPX_TO_FORTRAN_ANYD(fab)); + } + else + // Multiple FFT patches on this MPI rank + { + amrex::Abort("WarpX::PushPSATD: TODO"); } BL_PROFILE_VAR_STOP(blp_push_eb); @@ -498,7 +486,8 @@ WarpX::PushPSATD (int lev, amrex::Real /* dt */) { amrex::Abort("WarpX::PushPSATD: TODO"); } +#else // AMREX_USE_CUDA is defined ; running on GPU + amrex::Abort("The option `psatd.fft_hybrid_mpi_decomposition` does not work on GPU."); +#endif } - - |