tree_amg_smoother Module Reference

Implements smoothers for use with TreeAMG matrix vector product.

Data Types
type	amg_cheby_t
	Type for Chebyshev iteration using TreeAMG matvec. More...
type	amg_jacobi_t
	Type for Chebyshev iteration using TreeAMG matvec. More...

Functions/Subroutines
subroutine	amg_cheby_init (this, n, lvl, max_iter)
	Initialization of chebyshev.
subroutine	amg_cheby_power (this, amg, n)
	Power method to approximate largest eigenvalue.
subroutine	amg_cheby_solve (this, x, f, n, amg, zero_init)
	Chebyshev smoother From Saad's iterative methods textbook.
subroutine	amg_device_cheby_power (this, amg, n)
	Power method to approximate largest eigenvalue.
subroutine	amg_device_cheby_solve (this, x, f, x_d, f_d, n, amg, zero_init)
	Chebyshev smoother From Saad's iterative methods textbook.
subroutine	amg_jacobi_init (this, n, lvl, max_iter)
	Initialization of Jacobi (this is expensive...)
subroutine	amg_jacobi_diag (this, amg, n)
	SAMPLE MATRIX DIAGONAL VALUES (DO NOT USE, EXPENSIVE)
subroutine	amg_jacobi_solve (this, x, f, n, amg, niter)
	Jacobi smoother.
subroutine	amg_smoo_monitor (lvl, smoo)
subroutine	amg_cheby_monitor (lvl, lam)

Function/Subroutine Documentation

amg_cheby_init()

subroutine tree_amg_smoother::amg_cheby_init	(	class(amg_cheby_t), intent(inout), target	this,
		integer, intent(in)	n,
		integer, intent(in)	lvl,
		integer, intent(in)	max_iter
	)

Parameters

n	Number of dofs
lvl	The tamg hierarchy level on which the iterations are to be applied
max_iter	The number of iterations (chebyshev degree)

Definition at line 97 of file tree_amg_smoother.f90.

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amg_cheby_monitor()

subroutine tree_amg_smoother::amg_cheby_monitor ( integer, intent(in)  lvl, real(kind=rp), intent(in)  lam  )

private

Definition at line 444 of file tree_amg_smoother.f90.

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amg_cheby_power()

subroutine tree_amg_smoother::amg_cheby_power ( class(amg_cheby_t), intent(inout)  this, type(tamg_hierarchy_t), intent(inout)  amg, integer, intent(in)  n  )

private

Parameters

amg	TreeAMG object
n	Number of dofs

Definition at line 124 of file tree_amg_smoother.f90.

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amg_cheby_solve()

subroutine tree_amg_smoother::amg_cheby_solve ( class(amg_cheby_t), intent(inout)  this, real(kind=rp), dimension(n), intent(inout)  x, real(kind=rp), dimension(n), intent(inout)  f, integer, intent(in)  n, class(tamg_hierarchy_t), intent(inout)  amg, logical, intent(in), optional  zero_init  )

private

Parameters

x	The solution to be returned
f	The right-hand side
n	Number of dofs
amg	The TreeAMG object

Definition at line 184 of file tree_amg_smoother.f90.

amg_device_cheby_power()

subroutine tree_amg_smoother::amg_device_cheby_power ( class(amg_cheby_t), intent(inout)  this, type(tamg_hierarchy_t), intent(inout)  amg, integer, intent(in)  n  )

private

Parameters

amg	TreeAMG object
n	Number of dofs

Definition at line 240 of file tree_amg_smoother.f90.

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amg_device_cheby_solve()

subroutine tree_amg_smoother::amg_device_cheby_solve ( class(amg_cheby_t), intent(inout)  this, real(kind=rp), dimension(n), intent(inout)  x, real(kind=rp), dimension(n), intent(inout)  f, type(c_ptr)  x_d, type(c_ptr)  f_d, integer, intent(in)  n, class(tamg_hierarchy_t), intent(inout)  amg, logical, intent(in), optional  zero_init  )

private

Parameters

x	The solution to be returned
f	The right-hand side
n	Number of dofs
amg	The TreeAMG object

Definition at line 298 of file tree_amg_smoother.f90.

amg_jacobi_diag()

subroutine tree_amg_smoother::amg_jacobi_diag ( class(amg_jacobi_t), intent(inout)  this, type(tamg_hierarchy_t), intent(inout)  amg, integer, intent(in)  n  )

private

Parameters

amg	TreeAMG object
n	Number of dofs

Definition at line 376 of file tree_amg_smoother.f90.

amg_jacobi_init()

subroutine tree_amg_smoother::amg_jacobi_init ( class(amg_jacobi_t), intent(inout), target  this, integer, intent(in)  n, integer, intent(in)  lvl, integer, intent(in)  max_iter  )

private

Parameters

n	Number of dofs
lvl	The tamg hierarchy level on which the iterations are to be applied
max_iter	The number of iterations

Definition at line 357 of file tree_amg_smoother.f90.

amg_jacobi_solve()

subroutine tree_amg_smoother::amg_jacobi_solve ( class(amg_jacobi_t), intent(inout)  this, real(kind=rp), dimension(n), intent(inout)  x, real(kind=rp), dimension(n), intent(inout)  f, integer, intent(in)  n, class(tamg_hierarchy_t), intent(inout)  amg, integer, intent(in), optional  niter  )

private

Parameters

x	The solution to be returned
f	The right-hand side
n	Number of dofs
amg	The TreeAMG object

w = A x

r = f - Ax

r = Dinv * (f - Ax)

x = x + omega * Dinv * (f - Ax)

Definition at line 394 of file tree_amg_smoother.f90.

amg_smoo_monitor()

subroutine tree_amg_smoother::amg_smoo_monitor ( integer, intent(in)  lvl, class(amg_cheby_t), intent(in)  smoo  )

private

Definition at line 433 of file tree_amg_smoother.f90.

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