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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 |
| 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, beta) |
| Set up MPI I/O data views and variable pointers for parallel file output. | |
| subroutine | s_initialize_mpi_data_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 (icfl_max_loc, vcfl_max_loc, rc_min_loc, icfl_max_glb, vcfl_max_glb, rc_min_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 bookkeept on the rank 0 processor. | |
| 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_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) |
| 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 |
| Decompose the computational domain among processors by balancing cells per rank in each coordinate direction. | |
| subroutine | s_mpi_sendrecv_grid_variables_buffers (mpi_dir, pbc_loc) |
| 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. | |
| 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. | |
| integer(kind=8) | halo_size |
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 669 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 2453 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_initialize_mpi_common_module |
Initialize the module.
Definition at line 387 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(scalar_field), intent(in), optional | beta ) |
Set up MPI I/O data views and variable pointers for parallel file output.
Definition at line 511 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_initialize_mpi_data_ds | ( | type(scalar_field), dimension(sys_size), intent(in) | q_cons_vf | ) |
Set up MPI I/O data views for downsampled (coarsened) parallel file output.
Definition at line 593 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 851 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_allreduce_integer_sum | ( | integer, intent(in) | var_loc, |
| integer, intent(out) | var_glb ) |
Reduce a local integer value to its global sum across all MPI ranks.
Definition at line 771 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 801 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 787 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 736 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(out) | 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 750 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 882 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_decompose_computational_domain |
Decompose the computational domain among processors by balancing cells per rank in each coordinate direction.
Non-optimal number of processors in the x-, y- and z-directions
Definition at line 1966 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 893 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 639 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 488 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 834 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 815 of file m_mpi_common.fpp.f90.
| impure subroutine m_mpi_common::s_mpi_reduce_stability_criteria_extrema | ( | real(wp), intent(in) | icfl_max_loc, |
| real(wp), intent(in) | vcfl_max_loc, | ||
| real(wp), intent(in) | rc_min_loc, | ||
| real(wp), intent(out) | icfl_max_glb, | ||
| real(wp), intent(out) | vcfl_max_glb, | ||
| real(wp), intent(out) | rc_min_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 bookkeept on the rank 0 processor.
Definition at line 702 of file m_mpi_common.fpp.f90.
| subroutine m_mpi_common::s_mpi_sendrecv_grid_variables_buffers | ( | integer, intent(in) | mpi_dir, |
| integer, intent(in) | pbc_loc ) |
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 2381 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 ) |
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 905 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 683 of file m_mpi_common.fpp.f90.
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private |
Primitive variable receive buffer for halo exchange.
Definition at line 356 of file m_mpi_common.fpp.f90.
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private |
Primitive variable send buffer for halo exchange.
Definition at line 355 of file m_mpi_common.fpp.f90.
| integer(kind=8) m_mpi_common::halo_size |
Definition at line 371 of file m_mpi_common.fpp.f90.
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private |
Definition at line 342 of file m_mpi_common.fpp.f90.