dl_mg_types Module Reference

derived data types that encapsulate information on grid setup, to be used at each multigrid level More...

Data Types
type	boundary_values_t
type	mg_t
type	map_array1_t
	Used in fd_t to allow variable length arrays which map distance between neighbouring MPI ranks to rank id / halo elements available dim (2,n_of_neighbourd) for fixed neighbour first element contains the rank of the neighbor, the second the size of the buffers to be transffered i.e. am(1,1) -> is the rank of the nearest neighbour am(2,1) -> the buffer size of nearest neighbour. More...
type	map_array2_t
type	fd_t
	Type containing data for high-order finite differences, used in defect correction. More...

Functions/Subroutines
subroutine	mg_get_idx (mg, sx, ex, sy, ey, sz, ez)

Variables
integer, parameter	north = 1
	boundaries codes More...
integer, parameter	south = 2
integer, parameter	west = 3
integer, parameter	east = 4
integer, parameter	bottom = 5
integer, parameter	top = 6
integer, parameter	nw = 7
integer, parameter	ne = 8
integer, parameter	nb = 9
integer, parameter	nt = 10
integer, parameter	sw = 11
integer, parameter	se = 12
integer, parameter	sb = 13
integer, parameter	st = 14
integer, parameter	wb = 15
integer, parameter	wt = 16
integer, parameter	eb = 17
integer, parameter	et = 18
integer, parameter	nwb = 19
integer, parameter	neb = 20
integer, parameter	nwt = 21
integer, parameter	net = 22
integer, parameter	swb = 23
integer, parameter	seb = 24
integer, parameter	swt = 25
integer, parameter	set = 26

Detailed Description

derived data types that encapsulate information on grid setup, to be used at each multigrid level

For MG calculation we need the following bits of information

start/end in local domain in terms of global index space -> sx,ex,sy,ye,sz,ez local grid start/end points must allow for halo or extra space needed when restricting the number of MPI ranks sxc,exc,syc,eyc,szc,ezc ( cg(3,2) ) data arrays p(sxc:exc,syc:eyc,szc:ezc), cof(:,:,:,8), f(...), r(...) boundary arrays ( save memory when BC=0 with a flag) communicator ( MPI_COMM_NULL if core is not active) should we have one more flag to signal active, inactive rank and a given MG level ? MPI coords myid global grid boundaries to take care of : N, S, W, E, B, T, NW, NE, NB, NT, SW, SE, SB, ST, WB, WT, EB, ET, NWB, NEB, NWT, NET, SWB, SEB, SWT, SET flag to mark that restriction at this level needs aggregation, i. e., the next coarse level has a reduced number of ranks, hence some ranks will receive data from the discarded ranks. timer storage usefull for performace tunning computation, communication, threads(?)

Function/Subroutine Documentation

mg_get_idx()

subroutine dl_mg_types::mg_get_idx	(	type(mg_t), intent(in)	mg,
		integer, intent(out)	sx,
		integer, intent(out)	ex,
		integer, intent(out)	sy,
		integer, intent(out)	ey,
		integer, intent(out)	sz,
		integer, intent(out)	ez
	)

Variable Documentation

bottom

integer, parameter dl_mg_types::bottom = 5

east

integer, parameter dl_mg_types::east = 4

eb

integer, parameter dl_mg_types::eb = 17

et

integer, parameter dl_mg_types::et = 18

nb

integer, parameter dl_mg_types::nb = 9

ne

integer, parameter dl_mg_types::ne = 8

neb

integer, parameter dl_mg_types::neb = 20

net

integer, parameter dl_mg_types::net = 22

north

integer, parameter dl_mg_types::north = 1

boundaries codes

nt

integer, parameter dl_mg_types::nt = 10

nw

integer, parameter dl_mg_types::nw = 7

nwb

integer, parameter dl_mg_types::nwb = 19

nwt

integer, parameter dl_mg_types::nwt = 21

sb

integer, parameter dl_mg_types::sb = 13

se

integer, parameter dl_mg_types::se = 12

seb

integer, parameter dl_mg_types::seb = 24

set

integer, parameter dl_mg_types::set = 26

south

integer, parameter dl_mg_types::south = 2

st

integer, parameter dl_mg_types::st = 14

sw

integer, parameter dl_mg_types::sw = 11

swb

integer, parameter dl_mg_types::swb = 23

swt

integer, parameter dl_mg_types::swt = 25

top

integer, parameter dl_mg_types::top = 6

wb

integer, parameter dl_mg_types::wb = 15

west

integer, parameter dl_mg_types::west = 3

wt

integer, parameter dl_mg_types::wt = 16