heat_solver_m

A 1-D heat solver whose state lives on the device.

Source: src/third_party/FUNDAL/docs/examples/snippets/heat_4-module.F90

Dependencies

Contents

• heat_solver
• init
• run
• get
• destroy
• diffuse

Derived Types

heat_solver

Explicit solver of the 1-D heat equation, temperature with ghost cells 0 and n+1.

Components

Name	Type	Attributes	Description
n	integer(kind=I4P)
r	real(kind=R8P)
t_dev	real(kind=R8P)	pointer
tn_dev	real(kind=R8P)	pointer

Type-Bound Procedures

Name	Attributes	Description
init	pass(self)
run	pass(self)
get	pass(self)
destroy	pass(self)

Subroutines

init

Allocate the device state and upload the initial condition t(0:n+1).

subroutine init(self, t, r, ierr)

Arguments

Name	Type	Intent	Attributes	Description
self	class(heat_solver)	inout
t	real(kind=R8P)	in
r	real(kind=R8P)	in
ierr	integer(kind=I4P)	out

Call graph

run

Advance some steps on the device.

subroutine run(self, steps)

Arguments

Name	Type	Intent	Attributes	Description
self	class(heat_solver)	inout
steps	integer(kind=I4P)	in

Call graph

get

Download the temperature, ghost cells included.

subroutine get(self, t)

Arguments

Name	Type	Intent	Attributes	Description
self	class(heat_solver)	in
t	real(kind=R8P)	out

Call graph

destroy

Release the device state.

subroutine destroy(self)

Arguments

Name	Type	Intent	Attributes	Description
self	class(heat_solver)	inout

Call graph

diffuse

One explicit step: the device arrays are dummy arguments, as OpenACC deviceptr requires.

subroutine diffuse(n, r, t, tn)

Arguments

Name	Type	Intent	Attributes	Description
n	integer(kind=I4P)	in
r	real(kind=R8P)	in
t	real(kind=R8P)	in
tn	real(kind=R8P)	inout

Call graph