m_mpi_common.fpp.f90 File Reference

Contains module m_mpi_common. More...

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Modules
module	m_mpi_common
	MPI communication layer: domain decomposition, halo exchange, reductions, and parallel I/O setup.

Functions/Subroutines
impure subroutine	m_mpi_common::s_initialize_mpi_common_module
	Initialize the module.
impure subroutine	m_mpi_common::s_mpi_initialize
	Initialize the MPI execution environment and query the number of processors and local rank.
impure subroutine	m_mpi_common::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	m_mpi_common::s_initialize_mpi_data_ds (q_cons_vf)
	Set up MPI I/O data views for downsampled (coarsened) parallel file output.
impure subroutine	m_mpi_common::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	m_mpi_common::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	m_mpi_common::s_prohibit_abort (condition, message)
	Print a case file error with the prohibited condition and message, then abort execution.
impure subroutine	m_mpi_common::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	m_mpi_common::s_mpi_allreduce_sum (var_loc, var_glb)
	Reduce a local real value to its global sum across all MPI ranks.
impure subroutine	m_mpi_common::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	m_mpi_common::s_mpi_allreduce_integer_sum (var_loc, var_glb)
	Reduce a local integer value to its global sum across all MPI ranks.
impure subroutine	m_mpi_common::s_mpi_allreduce_min (var_loc, var_glb)
	Reduce a local real value to its global minimum across all MPI ranks.
impure subroutine	m_mpi_common::s_mpi_allreduce_max (var_loc, var_glb)
	Reduce a local real value to its global maximum across all MPI ranks.
impure subroutine	m_mpi_common::s_mpi_reduce_min (var_loc)
	Reduce a local real value to its global minimum across all ranks.
impure subroutine	m_mpi_common::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	m_mpi_common::s_mpi_abort (prnt, code)
	The subroutine terminates the MPI execution environment.
impure subroutine	m_mpi_common::s_mpi_barrier
	Halts all processes until all have reached barrier.
impure subroutine	m_mpi_common::s_mpi_finalize
	The subroutine finalizes the MPI execution environment.
subroutine	m_mpi_common::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	m_mpi_common::s_mpi_decompose_computational_domain
	Decompose the computational domain among processors by balancing cells per rank in each coordinate direction.
subroutine	m_mpi_common::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	m_mpi_common::s_finalize_mpi_common_module
	Module deallocation and/or disassociation procedures.

Variables
integer, private	m_mpi_common::v_size
real(wp), dimension(:), allocatable, private	m_mpi_common::buff_send
	Primitive variable send buffer for halo exchange.
real(wp), dimension(:), allocatable, private	m_mpi_common::buff_recv
	Primitive variable receive buffer for halo exchange.
integer(kind=8)	m_mpi_common::halo_size

Detailed Description

Contains module m_mpi_common.

Definition in file m_mpi_common.fpp.f90.