krylov::ksp_t Type Reference

Base abstract type for a canonical Krylov method, solving \( Ax = f \). More...

Inheritance diagram for krylov::ksp_t:

Public Member Functions
procedure(ksp_init_intrf), deferred, pass(this)	init (this, n, max_iter, m, rel_tol, abs_tol, monitor)
	Constructor.
procedure, pass(this)	ksp_init (this, max_iter, rel_tol, abs_tol, m, monitor)
	Base type constructor.
procedure, pass(this)	ksp_free (this)
	Base type destructor.
procedure, pass(this)	set_pc (this, m)
	Set preconditioner.
procedure(ksp_method), deferred, pass	solve (this, ax, x, f, n, coef, blst, gs_h, niter)
	Solve the system.
procedure(ksp_method_coupled), deferred, pass	solve_coupled (this, ax, x, y, z, fx, fy, fz, n, coef, blstx, blsty, blstz, gs_h, niter)
	Solve the system (coupled version).
procedure, pass(this)	monitor_start (this, name)
	Monitor start.
procedure, pass(this)	monitor_stop (this)
	Monitor stop.
procedure, pass(this)	monitor_iter (this, iter, rnorm)
	Monitor iteration.
procedure, pass(this)	is_converged (this, iter, residual)
	Check for convergence.
procedure(ksp_t_free), deferred, pass	free (this)
	Destructor.

Public Attributes
class(pc_t), pointer	m => null()
	Preconditioner.
real(kind=rp)	rel_tol
	Relative tolerance.
real(kind=rp)	abs_tol
	Absolute tolerance.
integer	max_iter
	Maximum number of iterations.
class(pc_t), allocatable	m_ident
	Internal preconditioner (Identity)
logical	monitor
	Turn on/off monitoring.

Detailed Description

Definition at line 73 of file krylov.f90.

Member Function/Subroutine Documentation

free()

procedure(ksp_t_free), deferred, pass krylov::ksp_t::free ( class(ksp_t), intent(inout)  this )

pure virtual

Definition at line 102 of file krylov.f90.

init()

procedure(ksp_init_intrf), deferred, pass(this) krylov::ksp_t::init ( class(ksp_t), intent(inout), target  this, integer, intent(in)  n, integer, intent(in)  max_iter, class(pc_t), intent(in), optional, target  m, real(kind=rp), intent(in), optional  rel_tol, real(kind=rp), intent(in), optional  abs_tol, logical, intent(in), optional  monitor  )

pure virtual

Definition at line 82 of file krylov.f90.

is_converged()

procedure, pass(this) krylov::ksp_t::is_converged	(	class(ksp_t), intent(in)	this,
		integer, intent(in)	iter,
		real(kind=rp), intent(in)	residual
	)

This function checks if the Krylov solver has converged. The solver is considered converged if the residual is less than the absolute tolerance.

Parameters

residual	Residual
iter	Iteration number

Definition at line 100 of file krylov.f90.

ksp_free()

procedure, pass(this) krylov::ksp_t::ksp_free

(

class(ksp_t), intent(inout)

this

)

Definition at line 86 of file krylov.f90.

ksp_init()

procedure, pass(this) krylov::ksp_t::ksp_init	(	class(ksp_t), intent(inout), target	this,
		integer, intent(in)	max_iter,
		real(kind=rp), intent(in), optional	rel_tol,
		real(kind=rp), intent(in), optional	abs_tol,
		class(pc_t), intent(in), optional, target	m,
		logical, intent(in), optional	monitor
	)

Parameters

object	The object to be allocated.
n	Size of the vectors the solver operates on.
type_name	The name of the solver type.
max_iter	The maximum number of iterations
abstol	The absolute tolerance, optional.
M	The preconditioner, optional.
monitor	Enable/disable monitoring, optional. Constructor for the base type.
max_iter	Maximum number of iterations.
rel_tol	Relative tolarance for converence.
rel_tol	Absolute tolarance for converence.
M	The preconditioner.

Definition at line 84 of file krylov.f90.

monitor_iter()

procedure, pass(this) krylov::ksp_t::monitor_iter	(	class(ksp_t), intent(in)	this,
		integer, intent(in)	iter,
		real(kind=rp), intent(in)	rnorm
	)

Definition at line 98 of file krylov.f90.

monitor_start()

procedure, pass(this) krylov::ksp_t::monitor_start	(	class(ksp_t), intent(in)	this,
		character(len=*)	name
	)

Definition at line 94 of file krylov.f90.

monitor_stop()

procedure, pass(this) krylov::ksp_t::monitor_stop

(

class(ksp_t), intent(in)

this

)

Definition at line 96 of file krylov.f90.

set_pc()

procedure, pass(this) krylov::ksp_t::set_pc	(	class(ksp_t), intent(inout)	this,
		class(pc_t), intent(in), target	m
	)

Parameters

M	The preconditioner.

Definition at line 88 of file krylov.f90.

solve()

procedure(ksp_method), deferred, pass krylov::ksp_t::solve ( class(ksp_t), intent(inout)  this, class(ax_t), intent(in)  ax, type(field_t), intent(inout)  x, real(kind=rp), dimension(n), intent(in)  f, integer, intent(in)  n, type(coef_t), intent(inout)  coef, type(bc_list_t), intent(inout)  blst, type(gs_t), intent(inout)  gs_h, integer, intent(in), optional  niter  )

pure virtual

Definition at line 90 of file krylov.f90.

solve_coupled()

procedure(ksp_method_coupled), deferred, pass krylov::ksp_t::solve_coupled ( class(ksp_t), intent(inout)  this, class(ax_t), intent(in)  ax, type(field_t), intent(inout)  x, type(field_t), intent(inout)  y, type(field_t), intent(inout)  z, real(kind=rp), dimension(n), intent(in)  fx, real(kind=rp), dimension(n), intent(in)  fy, real(kind=rp), dimension(n), intent(in)  fz, integer, intent(in)  n, type(coef_t), intent(inout)  coef, type(bc_list_t), intent(inout)  blstx, type(bc_list_t), intent(inout)  blsty, type(bc_list_t), intent(inout)  blstz, type(gs_t), intent(inout)  gs_h, integer, intent(in), optional  niter  )

pure virtual

Definition at line 92 of file krylov.f90.

Member Data Documentation

abs_tol

real(kind=rp) krylov::ksp_t::abs_tol

Definition at line 76 of file krylov.f90.

m

class(pc_t), pointer krylov::ksp_t::m => null()

Definition at line 74 of file krylov.f90.

m_ident

class(pc_t), allocatable krylov::ksp_t::m_ident

Definition at line 78 of file krylov.f90.

max_iter

integer krylov::ksp_t::max_iter

Definition at line 77 of file krylov.f90.

monitor

logical krylov::ksp_t::monitor

Definition at line 79 of file krylov.f90.

rel_tol

real(kind=rp) krylov::ksp_t::rel_tol

Definition at line 75 of file krylov.f90.

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The documentation for this type was generated from the following file:

• /home/runner/work/neko/neko/src/krylov/krylov.f90