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MFC
Exascale flow solver
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MFC
Exascale flow solver
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MPI communication layer: domain decomposition, halo exchange, reductions, and parallel I/O setup. More...
Functions/Subroutines | |
| impure subroutine | s_initialize_mpi_common_module (exchange_all_chemistry_temperatures_in, use_rdma_transport_in) |
| Initialize the module. | |
| impure subroutine | s_mpi_initialize |
| Initialize the MPI execution environment and query the number of processors and local rank. | |
| impure subroutine | s_initialize_mpi_data (q_cons_vf, ib_markers, ib_mpi_data, beta, qbmm_pb, qbmm_mv) |
| Set up MPI I/O data views and variable pointers for parallel file output. | |
| subroutine | s_initialize_mpi_data_ds (m_ds, n_ds, p_ds, q_cons_vf) |
| Set up MPI I/O data views for downsampled (coarsened) parallel file output. | |
| impure subroutine | s_mpi_gather_data (my_vector, counts, gathered_vector, root) |
| Gather variable-length real vectors from all MPI ranks onto the root process. | |
| impure subroutine | mpi_bcast_time_step_values (proc_time, time_avg) |
| Gather per-rank time step wall-clock times onto rank 0 for performance reporting. | |
| impure subroutine | s_prohibit_abort (condition, message) |
| Print a case file error with the prohibited condition and message, then abort execution. | |
| impure subroutine | s_mpi_reduce_stability_criteria_extrema (max_loc, min_loc, bubs_loc, max_glb, min_glb, bubs_glb) |
| The goal of this subroutine is to determine the global extrema of the stability criteria in the computational domain. This is performed by sifting through the local extrema of each stability criterion. Note that each of the local extrema is from a single process, within its assigned section of the computational domain. Finally, note that the global extrema values are only bookkept on the rank 0 processor. max_loc/max_glb hold the max-reduced criteria (ICFL, VCFL, CCFL, TCFL) and min_loc/min_glb hold the min-reduced criteria (Rc). | |
| subroutine | s_mpi_reduce_int_sum (var_loc, sum) |
| Reduce a local integer value to its global sum across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_sum (var_loc, var_glb) |
| Reduce a local real value to its global sum across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_vectors_sum (var_loc, var_glb, num_vectors, vector_length) |
| Reduce an array of vectors to their global sums across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_integer_sum (var_loc, var_glb) |
| Reduce a local integer value to its global sum across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_min (var_loc, var_glb) |
| Reduce a local real value to its global minimum across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_min_vec (var_loc, var_glb) |
| Reduce a local real vector to its elementwise global minimum across all MPI ranks. | |
| impure subroutine | s_mpi_allreduce_max (var_loc, var_glb) |
| Reduce a local real value to its global maximum across all MPI ranks. | |
| impure subroutine | s_mpi_reduce_min (var_loc) |
| Reduce a local real value to its global minimum across all ranks. | |
| impure subroutine | s_mpi_reduce_maxloc (var_loc) |
| Reduce a 2-element variable to its global maximum value with the owning processor rank (MPI_MAXLOC). Reduce a local value to its global maximum with location (rank) across all ranks. | |
| impure subroutine | s_mpi_abort (prnt, code) |
| The subroutine terminates the MPI execution environment. | |
| impure subroutine | s_mpi_barrier |
| Halts all processes until all have reached barrier. | |
| impure subroutine | s_mpi_finalize |
| The subroutine finalizes the MPI execution environment. | |
| subroutine | s_mpi_sendrecv_variables_buffers (q_comm, mpi_dir, pbc_loc, nvar, pb_in, mv_in, q_t_sf) |
| The goal of this procedure is to populate the buffers of the cell-average conservative variables by communicating with the neighboring processors. | |
| subroutine | s_mpi_reduce_beta_variables_buffers (q_comm, kahan_comp, mpi_dir, pbc_loc, nvar) |
| The goal of this procedure is to populate the buffers of the cell-average conservative variables by communicating with the neighboring processors. | |
| subroutine | s_mpi_decompose_computational_domain (write_silo_ghost_offsets, adjust_local_domains, output_offsets, local_domains) |
| The purpose of this procedure is to optimally decompose the computational domain among the available processors. This is performed by attempting to award each processor, in each of the coordinate directions, approximately the same number of cells, and then recomputing the affected global parameters. | |
| subroutine, private | s_apply_decomposition_policies (proc_counts, remainders, local_cells, global_cells, write_silo_ghost_offsets, adjust_local_domains, output_offsets, local_domains) |
| Apply executable-configured output and local-domain policies after the shared Cartesian decomposition. | |
| subroutine | s_mpi_sendrecv_grid_variable_buffer (cell_boundaries, cell_centers, cell_widths, num_cells, bc_bounds, pbc_loc, offset) |
| The goal of this procedure is to populate the buffers of the grid variables by communicating with the neighboring processors. Note that only the buffers of the cell-width distributions are handled in such a way. This is because the buffers of cell-boundary locations may be calculated directly from those of the cell-width distributions. | |
| subroutine | s_apply_grid_from_global_dim (x_cb_glb, m_dim_glb, m_dim, sidx, bc_beg, bc_end, cb_lo, cb_hi, cw_lo, cw_hi, x_cb_loc, x_cc_loc, dx_loc) |
| Populate the local cell-boundary, cell-center, and cell-width arrays in one direction directly from the global cell-boundary array. This guarantees that every rank sees bitwise-identical values at any shared physical cell or boundary. | |
| impure subroutine | s_finalize_mpi_common_module |
| Module deallocation and/or disassociation procedures. | |
Variables | |
| integer, private | v_size |
| real(wp), dimension(:), allocatable, private | buff_send |
| Primitive variable send buffer for halo exchange. | |
| real(wp), dimension(:), allocatable, private | buff_recv |
| Primitive variable receive buffer for halo exchange Variables for EL bubbles communication. | |
| type(int_bounds_info), dimension(3) | comm_coords |
| integer, dimension(3) | comm_size |
| integer, dimension(1:3) | beta_vars = [1, 2, 5] |
| q_beta indices to communicate: 1=void fraction, 2=d(beta)/dt, 5=energy source | |
| integer(kind=8) | halo_size |
| logical, private | exchange_all_chemistry_temperatures = .false. |
| logical, private | use_rdma_transport = .false. |
MPI communication layer: domain decomposition, halo exchange, reductions, and parallel I/O setup.
| impure subroutine m_mpi_common::mpi_bcast_time_step_values | ( | real(wp), dimension(0:num_procs - 1), intent(inout) | proc_time, |
| real(wp), intent(inout) | time_avg ) |
Gather per-rank time step wall-clock times onto rank 0 for performance reporting.
Definition at line 734 of file m_mpi_common.fpp.f90.
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Apply executable-configured output and local-domain policies after the shared Cartesian decomposition.
Definition at line 3296 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_apply_grid_from_global_dim | ( | real(wp), dimension(-1:m_dim_glb), intent(in) | x_cb_glb, |
| integer, intent(in) | m_dim_glb, | ||
| integer, intent(in) | m_dim, | ||
| integer, intent(in) | sidx, | ||
| integer, intent(in) | bc_beg, | ||
| integer, intent(in) | bc_end, | ||
| integer, intent(in) | cb_lo, | ||
| integer, intent(in) | cb_hi, | ||
| integer, intent(in) | cw_lo, | ||
| integer, intent(in) | cw_hi, | ||
| real(wp), dimension(-1 - cb_lo:m_dim + cb_hi), intent(inout) | x_cb_loc, | ||
| real(wp), dimension(-cw_lo:m_dim + cw_hi), intent(inout) | x_cc_loc, | ||
| real(wp), dimension(-cw_lo:m_dim + cw_hi), intent(inout) | dx_loc ) |
Populate the local cell-boundary, cell-center, and cell-width arrays in one direction directly from the global cell-boundary array. This guarantees that every rank sees bitwise-identical values at any shared physical cell or boundary.
Definition at line 3415 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_finalize_mpi_common_module |
Module deallocation and/or disassociation procedures.
Definition at line 3493 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_initialize_mpi_common_module | ( | logical, intent(in) | exchange_all_chemistry_temperatures_in, |
| logical, intent(in) | use_rdma_transport_in ) |
Initialize the module.
Definition at line 428 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_initialize_mpi_data | ( | type(scalar_field), dimension(sys_size), intent(in) | q_cons_vf, |
| type(integer_field), intent(in), optional | ib_markers, | ||
| type(mpi_io_ib_var), intent(inout), optional | ib_mpi_data, | ||
| type(scalar_field), intent(in), optional | beta, | ||
| type(pres_field), intent(in), optional | qbmm_pb, | ||
| type(pres_field), intent(in), optional | qbmm_mv ) |
Set up MPI I/O data views and variable pointers for parallel file output.
Definition at line 584 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_initialize_mpi_data_ds | ( | integer, intent(in) | m_ds, |
| integer, intent(in) | n_ds, | ||
| integer, intent(in) | p_ds, | ||
| type(scalar_field), dimension(sys_size), intent(in), optional | q_cons_vf ) |
Set up MPI I/O data views for downsampled (coarsened) parallel file output.
Definition at line 667 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_abort | ( | character(len=*), intent(in), optional | prnt, |
| integer, intent(in), optional | code ) |
The subroutine terminates the MPI execution environment.
Definition at line 959 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_integer_sum | ( | integer(kind=8), intent(in) | var_loc, |
| integer(kind=8), intent(out) | var_glb ) |
Reduce a local integer value to its global sum across all MPI ranks.
Definition at line 863 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_max | ( | real(wp), intent(in) | var_loc, |
| real(wp), intent(out) | var_glb ) |
Reduce a local real value to its global maximum across all MPI ranks.
Definition at line 909 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_min | ( | real(wp), intent(in) | var_loc, |
| real(wp), intent(out) | var_glb ) |
Reduce a local real value to its global minimum across all MPI ranks.
Definition at line 879 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_min_vec | ( | real(wp), dimension(:), intent(in) | var_loc, |
| real(wp), dimension(:), intent(out) | var_glb ) |
Reduce a local real vector to its elementwise global minimum across all MPI ranks.
Definition at line 893 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_sum | ( | real(wp), intent(in) | var_loc, |
| real(wp), intent(out) | var_glb ) |
Reduce a local real value to its global sum across all MPI ranks.
Definition at line 828 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_vectors_sum | ( | real(wp), dimension(:,:), intent(in) | var_loc, |
| real(wp), dimension(:,:), intent(inout) | var_glb, | ||
| integer, intent(in) | num_vectors, | ||
| integer, intent(in) | vector_length ) |
Reduce an array of vectors to their global sums across all MPI ranks.
Definition at line 842 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_barrier |
Halts all processes until all have reached barrier.
Definition at line 990 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_decompose_computational_domain | ( | logical, intent(in) | write_silo_ghost_offsets, |
| logical, intent(in) | adjust_local_domains, | ||
| type(int_bounds_info), dimension(3), intent(inout), optional | output_offsets, | ||
| type(bounds_info), dimension(3), intent(inout), optional | local_domains ) |
The purpose of this procedure is to optimally decompose the computational domain among the available processors. This is performed by attempting to award each processor, in each of the coordinate directions, approximately the same number of cells, and then recomputing the affected global parameters.
Non-optimal number of processors in the x-, y- and z-directions
Definition at line 2902 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_finalize |
The subroutine finalizes the MPI execution environment.
Definition at line 1001 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_gather_data | ( | real(wp), dimension(counts), intent(in) | my_vector, |
| integer, intent(in) | counts, | ||
| real(wp), dimension(:), intent(out), allocatable | gathered_vector, | ||
| integer, intent(in) | root ) |
Gather variable-length real vectors from all MPI ranks onto the root process.
| [in] | counts | Array of vector lengths for each process |
| [in] | my_vector | Input vector on each process |
| [in] | root | Rank of the root process |
| [out] | gathered_vector | Gathered vector on the root process |
Definition at line 704 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_initialize |
Initialize the MPI execution environment and query the number of processors and local rank.
Definition at line 549 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_reduce_beta_variables_buffers | ( | type(scalar_field), dimension(1:), intent(inout) | q_comm, |
| type(scalar_field), dimension(1:), intent(inout) | kahan_comp, | ||
| integer, intent(in) | mpi_dir, | ||
| integer, intent(in) | pbc_loc, | ||
| integer, intent(in) | nvar ) |
The goal of this procedure is to populate the buffers of the cell-average conservative variables by communicating with the neighboring processors.
| q_cons_vf | Cell-average conservative variables |
| mpi_dir | MPI communication coordinate direction |
| pbc_loc | Processor boundary condition (PBC) location |
Definition at line 2362 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_reduce_int_sum | ( | integer, intent(in) | var_loc, |
| integer, intent(out) | sum ) |
Reduce a local integer value to its global sum across all MPI ranks.
Definition at line 812 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_reduce_maxloc | ( | real(wp), dimension(2), intent(inout) | var_loc | ) |
Reduce a 2-element variable to its global maximum value with the owning processor rank (MPI_MAXLOC). Reduce a local value to its global maximum with location (rank) across all ranks.
Definition at line 942 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_reduce_min | ( | real(wp), intent(inout) | var_loc | ) |
Reduce a local real value to its global minimum across all ranks.
Definition at line 923 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_reduce_stability_criteria_extrema | ( | real(wp), dimension(:), intent(in) | max_loc, |
| real(wp), dimension(:), intent(in) | min_loc, | ||
| integer, intent(in) | bubs_loc, | ||
| real(wp), dimension(:), intent(out) | max_glb, | ||
| real(wp), dimension(:), intent(out) | min_glb, | ||
| integer, intent(out) | bubs_glb ) |
The goal of this subroutine is to determine the global extrema of the stability criteria in the computational domain. This is performed by sifting through the local extrema of each stability criterion. Note that each of the local extrema is from a single process, within its assigned section of the computational domain. Finally, note that the global extrema values are only bookkept on the rank 0 processor. max_loc/max_glb hold the max-reduced criteria (ICFL, VCFL, CCFL, TCFL) and min_loc/min_glb hold the min-reduced criteria (Rc).
Definition at line 768 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_sendrecv_grid_variable_buffer | ( | real(wp), dimension(-1 - offset%beg:), intent(inout), contiguous | cell_boundaries, |
| real(wp), dimension(-buff_size:), intent(inout), contiguous | cell_centers, | ||
| real(wp), dimension(-buff_size:), intent(inout), contiguous | cell_widths, | ||
| integer, intent(in) | num_cells, | ||
| type(int_bounds_info), intent(in) | bc_bounds, | ||
| integer, intent(in) | pbc_loc, | ||
| type(int_bounds_info), intent(in) | offset ) |
The goal of this procedure is to populate the buffers of the grid variables by communicating with the neighboring processors. Note that only the buffers of the cell-width distributions are handled in such a way. This is because the buffers of cell-boundary locations may be calculated directly from those of the cell-width distributions.
Definition at line 3360 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_sendrecv_variables_buffers | ( | type(scalar_field), dimension(1:), intent(inout) | q_comm, |
| integer, intent(in) | mpi_dir, | ||
| integer, intent(in) | pbc_loc, | ||
| integer, intent(in) | nvar, | ||
| real(stp), dimension(idwbuff(1)%beg:,idwbuff(2)%beg:,idwbuff(3)%beg:,1:,1:), intent(inout), optional | pb_in, | ||
| real(stp), dimension(idwbuff(1)%beg:,idwbuff(2)%beg:,idwbuff(3)%beg:,1:,1:), intent(inout), optional | mv_in, | ||
| type(scalar_field), intent(inout), optional | q_t_sf ) |
The goal of this procedure is to populate the buffers of the cell-average conservative variables by communicating with the neighboring processors.
Definition at line 1013 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_prohibit_abort | ( | character(len=*), intent(in) | condition, |
| character(len=*), intent(in) | message ) |
Print a case file error with the prohibited condition and message, then abort execution.
Definition at line 748 of file m_mpi_common.fpp.f90.
| integer, dimension(1:3) m_mpi_common::beta_vars = [1, 2, 5] |
q_beta indices to communicate: 1=void fraction, 2=d(beta)/dt, 5=energy source
Definition at line 382 of file m_mpi_common.fpp.f90.
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private |
Primitive variable receive buffer for halo exchange Variables for EL bubbles communication.
Definition at line 378 of file m_mpi_common.fpp.f90.
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private |
Primitive variable send buffer for halo exchange.
Definition at line 376 of file m_mpi_common.fpp.f90.
| type(int_bounds_info), dimension(3) m_mpi_common::comm_coords |
Definition at line 379 of file m_mpi_common.fpp.f90.
| integer, dimension(3) m_mpi_common::comm_size |
Definition at line 380 of file m_mpi_common.fpp.f90.
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Definition at line 422 of file m_mpi_common.fpp.f90.
| integer(kind=8) m_mpi_common::halo_size |
Definition at line 409 of file m_mpi_common.fpp.f90.
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private |
Definition at line 423 of file m_mpi_common.fpp.f90.
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private |
Definition at line 363 of file m_mpi_common.fpp.f90.