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PetscLeaf.F90
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PetscLeaf.F90
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#define EXTERNAL_FACE -1
MODULE PETScTeaLeaf
USE definitions_module
use petscksp
use dmda
IMPLICIT NONE
INTEGER :: perr
INTEGER :: mpisize
KSP :: kspObj
Vec :: Sol
Vec :: X
Vec :: B
Mat :: A
Vec :: XLoc
Vec :: RHSLoc
DM :: petscDA
CONTAINS
SUBROUTINE setup_petsc(eps,max_iters)
USE data_module
#include "finclude/petscsys.h"
INTEGER :: c,cx,cy
REAL(kind=8) :: eps
INTEGER :: max_iters
CALL PetscInitialize(PETSC_NULL_CHARACTER,perr)
! px, py, pz set in tea_decompose to be chunks_x, chunks_y, and chunks_z
! tea_decompose MUST be called first
CALL DMDACreate3D(PETSC_COMM_WORLD, &
DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE, &
DMDA_STENCIL_STAR, &
grid%x_cells,grid%y_cells,grid%z_cells, &
px,py,pz, &
1,1, &
lx(1:px),ly(1:py),lz(1:pz), &
petscDA,perr)
call DMSetFromOptions(petscDA,perr)
call DMSetUp(petscDA,perr)
! Setup the KSP Solver
CALL KSPCreate(MPI_COMM_WORLD,kspObj,perr)
CALL KSPSetTolerances(kspObj,eps,PETSC_DEFAULT_REAL,PETSC_DEFAULT_REAL,max_iters,perr)
CALL KSPSetCheckNormIteration(kspObj,-1,perr)
CALL KSPSetFromOptions(kspObj,perr)
IF(parallel%boss) THEN
WRITE(g_out,*)
WRITE(g_out,*)'PETSc Setup:'
WRITE(g_out,*)'Absolute Tolerance set to', eps
WRITE(g_out,*)'max_iters set to', max_iters
ENDIF
CALL MPI_Comm_Size(MPI_COMM_WORLD,mpisize,perr)
IF(mpisize .EQ. 1) THEN
CALL DMSetMatType(petscDA,'seqaij',perr)
ELSE
CALL DMSetMatType(petscDA,'mpiaij',perr)
ENDIF
CALL DMCreateMatrix(petscDA,A,perr)
! Setup the initial solution vector
CALL DMCreateGlobalVector(petscDA,X,perr)
! Duplicate Vector to setup B
CALL DMCreateGlobalVector(petscDA,B,perr)
! Local Vector for RHS Vector
CALL DMCreateLocalVector(petscDA,RHSLoc,perr)
! Local Vector for X Vector
CALL DMCreateLocalVector(petscDA,XLoc,perr)
total_petsc_iter = 0
END SUBROUTINE setup_petsc
SUBROUTINE cleanup_petsc()
#include "finclude/petscsys.h"
call KSPDestroy(kspObj,perr)
call VecDestroy(Sol,perr)
call VecDestroy(X,perr)
call VecDestroy(B,perr)
call VecDestroy(XLoc,perr)
call VecDestroy(RHSLoc,perr)
call MatDestroy(A,perr)
call DMDestroy(petscDA,perr)
call PetscFinalize(perr)
END SUBROUTINE cleanup_petsc
SUBROUTINE setupSol_petsc(c,rx,ry,rz)
PetscErrorCode :: ierr
INTEGER :: c ! What chunk are we solving
INTEGER :: x_min,x_max,y_min,y_max,z_min,z_max
INTEGER :: g_xmin, g_xmax, g_ymin, g_ymax, g_zmin, g_zmax
INTEGER :: left,right,top,bottom,back,front
INTEGER :: i,j,k,ilen,count
REAL(KIND=8),pointer,dimension(:) :: rowdata
INTEGER,pointer,dimension(:) :: rowloc
REAL(KIND=8) :: val
REAL(KIND=8),INTENT(IN) :: rx,ry,rz
PetscScalar,pointer :: xv(:,:,:)
count = 0
x_min = chunks(c)%field%x_min
x_max = chunks(c)%field%x_max
y_min = chunks(c)%field%y_min
y_max = chunks(c)%field%y_max
z_min = chunks(c)%field%z_min
z_max = chunks(c)%field%z_max
g_xmin = 1
g_xmax = grid%x_cells
g_ymin = 1
g_ymax = grid%y_cells
g_zmin = 1
g_zmax = grid%z_cells
left = chunks(c)%field%left
right = chunks(c)%field%right
top = chunks(c)%field%top
bottom = chunks(c)%field%bottom
back = chunks(c)%field%back
front = chunks(c)%field%front
! u0 = chunks(c)%field%u
CALL VecZeroEntries(X,perr)
CALL DMDAVecGetArrayF90(petscDA,X,xv,perr)
DO k = back, front
DO j = bottom, top
DO i = left, right
xv(i-1,j-1,k-1) = chunks(c)%field%u((i-left)+1,(j-bottom)+1,(k-back)+1)
ENDDO
ENDDO
ENDDO
CALL DMDAVecRestoreArrayF90(petscDA,X,xv,perr)
END SUBROUTINE setupSol_petsc
SUBROUTINE setupRHS_petsc(c,rx,ry,rz)
PetscErrorCode :: ierr
INTEGER :: c ! What chunk are we solving
INTEGER :: left,right,top,bottom,back,front
INTEGER :: x_min,x_max,y_min,y_max,z_min,z_max
INTEGER :: g_xmin, g_xmax, g_ymin, g_ymax, g_zmin, g_zmax
INTEGER :: i,j,k,ilen,count,i_local,j_local,k_local
REAL(KIND=8),pointer,dimension(:) :: rowdata
INTEGER,pointer,dimension(:) :: rowloc
REAL(KIND=8) :: val
REAL(KIND=8),INTENT(IN) :: rx,ry,rz
PetscScalar,pointer :: bv(:,:,:)
count = 0
left = chunks(c)%field%left
right = chunks(c)%field%right
top = chunks(c)%field%top
bottom = chunks(c)%field%bottom
back = chunks(c)%field%back
front = chunks(c)%field%front
x_min = chunks(c)%field%x_min
x_max = chunks(c)%field%x_max
y_min = chunks(c)%field%y_min
y_max = chunks(c)%field%y_max
z_min = chunks(c)%field%z_min
z_max = chunks(c)%field%z_max
g_xmin = 1
g_xmax = grid%x_cells
g_ymin = 1
g_ymax = grid%y_cells
g_zmin = 1
g_zmax = grid%z_cells
CALL VecZeroEntries(B,perr)
CALL DMDAVecGetArrayF90(petscDA,B,bv,perr)
DO k = back, front
DO j = bottom, top
DO i = left, right
i_local = (i - left)+1
j_local = (j - bottom)+1
k_local = (k - back)+1
val = chunks(c)%field%u(i_local,j_local,k_local)
bv(i-1,j-1,k-1) = val
ENDDO
ENDDO
ENDDO
CALL DMDAVecRestoreArrayF90(petscDA,B,bv,perr)
END SUBROUTINE setupRHS_petsc
SUBROUTINE getSolution_petsc(c)
INTEGER :: i,j,k,ilen,rowloc
PetscScalar :: sol_v(1)
PetscOffset iss
INTEGER :: count
INTEGER :: x_min,x_max,y_min,y_max,z_min,z_max
INTEGER :: c ! What chunk are we solving
PetscScalar,pointer :: xv(:,:,:)
INTEGER :: left,right,top,bottom,back,front
left = chunks(c)%field%left
right = chunks(c)%field%right
top = chunks(c)%field%top
bottom = chunks(c)%field%bottom
back = chunks(c)%field%back
front = chunks(c)%field%front
CALL DMDAVecGetArrayF90(petscDA,X,xv,perr)
DO k = back, front
DO j = bottom, top
DO i = left, right
chunks(c)%field%u((i-left)+1,(j-bottom)+1,(k-back+1)) = xv(i-1,j-1,k-1)
ENDDO
ENDDO
ENDDO
CALL DMDAVecRestoreArrayF90(petscDA,X,xv,perr)
END SUBROUTINE getSolution_petsc
!! STILL TO FIX setupMatA_petsc
SUBROUTINE setupMatA_petsc(c,rx,ry,rz)
INTEGER :: c ! What chunk are we solving
INTEGER :: left,right,top,bottom,back,front
INTEGER :: x_min,x_max,y_min,y_max,z_min,z_max
INTEGER :: g_xmin, g_xmax, g_ymin, g_ymax, g_zmin, g_zmax
REAL(KIND=8),INTENT(IN) :: rx,ry,rz
INTEGER :: i,j,k,i_g,j_g,k_g
INTEGER :: count
REAL(KIND=8) :: c1,c2,c3,c4,c5,c6,c7 ! 7 point stencil
!! THIS ALL NEEDS TO CHANGE FOR 7 POINT STENCIL
MatStencil :: row(4,1) ! 6 x Number of stencils in entry (adding 1 at a time for now, so 1)
MatStencil :: column(4,7) ! 6 x Stencil Size: (i,j,k,m,n,l) * stencil Size (7 point stencil)
PetscScalar :: stencil(7) ! 6 x Stencil Size: (i,j,k,m,n,l) * stencil Size (7 point stencil)
left = chunks(c)%field%left
right = chunks(c)%field%right
top = chunks(c)%field%top
bottom = chunks(c)%field%bottom
back = chunks(c)%field%back
front = chunks(c)%field%front
x_min = chunks(c)%field%x_min
x_max = chunks(c)%field%x_max
y_min = chunks(c)%field%y_min
y_max = chunks(c)%field%y_max
z_min = chunks(c)%field%z_min
z_max = chunks(c)%field%z_max
g_xmin = 1
g_xmax = grid%x_cells
g_ymin = 1
g_ymax = grid%y_cells
g_zmin = 1
g_zmax = grid%z_cells
! Zero Matrix
CALL MatZeroEntries(A,perr)
! Fixed the loop number and local
DO k_g = back, front
DO j_g = bottom,top
DO i_g = left,right
! -1 is applied to all indexes to shift them to zero-index, presuming the fortran code maintains
! an index from 1 to max
i = (i_g - left) + 1
j = (j_g - bottom) + 1
k = (k_g - back) + 1
count = 1
row(MatStencil_i,1) = i_g - 1
row(MatStencil_j,1) = j_g - 1
row(MatStencil_k,1) = k_g - 1
c2 = (-1*rx) * chunks(c)%field%Vector_Kx(i,j,k)
c3 = (-1*rx) * chunks(c)%field%Vector_Kx(i+1,j,k)
c4 = (-1*ry) * chunks(c)%field%Vector_Ky(i,j,k)
c5 = (-1*ry) * chunks(c)%field%Vector_Ky(i,j+1,k)
c6 = (-1*rz) * chunks(c)%field%Vector_Kz(i,j,k)
c7 = (-1*rz) * chunks(c)%field%Vector_Kz(i,j,k+1)
! Dirichlet boundary
IF(i_g == 1) THEN ! Global X Low Boundary
c2=0
ENDIF
IF(i_g == grid%x_cells) THEN
c3=0
ENDIF
IF(j_g == 1) THEN
c4=0
ENDIF
IF(j_g == grid%y_cells) THEN
c5=0
ENDIF
IF(k_g == 1) THEN
c6=0
ENDIF
IF(k_g == grid%z_cells) THEN
c7=0
ENDIF
c1 = (1.0_8-c2-c3-c4-c5-c6-c7)
! If you are not on the Dirichlet Boundary
IF(.NOT.(k_g == 1)) THEN ! Not back External Boundary
stencil(count) = c6
column(MatStencil_i,count) = (i_g-1)
column(MatStencil_j,count) = (j_g-1)
column(MatStencil_k,count) = (k_g-1) - 1
count = count + 1
ENDIF
IF(.NOT.(j_g == 1)) THEN ! Not Bottom External Boundary
stencil(count) = c4
column(MatStencil_i,count) = (i_g-1)
column(MatStencil_j,count) = (j_g-1) - 1
column(MatStencil_k,count) = (k_g-1)
count = count + 1
ENDIF
IF(.NOT.(i_g == 1)) THEN ! Not Left External Boundary
stencil(count) = c2
column(MatStencil_i,count) = (i_g-1) - 1
column(MatStencil_j,count) = j_g - 1
column(MatStencil_k,count) = (k_g-1)
count = count + 1
ENDIF
! Cell Centered Value
stencil(count) = c1
column(MatStencil_i,count) = i_g - 1
column(MatStencil_j,count) = j_g - 1
column(MatStencil_k,count) = k_g - 1
count = count + 1
! If you are not on the Dirichlet Boundary
IF(.NOT.(i_g == grid%x_cells)) THEN ! Not Right External Boundary
stencil(count) = c3
column(MatStencil_i,count) = (i_g+1) - 1
column(MatStencil_j,count) = j_g - 1
column(MatStencil_k,count) = k_g - 1
count = count + 1
ENDIF
IF(.NOT.(j_g == grid%y_cells)) THEN ! Not Top External Boundary
stencil(count) = c5
column(MatStencil_i,count) = i_g - 1
column(MatStencil_j,count) = (j_g+1) - 1
column(MatStencil_k,count) = k_g - 1
count = count + 1
ENDIF
IF(.NOT.(k_g == grid%z_cells)) THEN ! Not Front External Boundary
stencil(count) = c7
column(MatStencil_i,count) = i_g - 1
column(MatStencil_j,count) = j_g - 1
column(MatStencil_k,count) = (k_g+1) - 1
count = count + 1
ENDIF
CALL MatSetValuesStencil(A,1,row,count-1,column,stencil,INSERT_VALUES,perr)
ENDDO
ENDDO
ENDDO
CALL MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY,perr)
CALL MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY,perr)
END SUBROUTINE setupMatA_petsc
!! STILL TO FIX setupMatA_petsc
SUBROUTINE solve_petsc(numit,error)
USE MPI
USE data_module
INTEGER,INTENT(INOUT) :: numit
REAL(KIND=8),INTENT(INOUT) :: error
INTEGER :: errcode, mpierr
KSPConvergedReason :: reason
PetscReal :: residual ! Final residual
CALL KSPSetOperators(kspObj,A,A,perr)
CALL KSPSolve(kspObj,B,X,perr)
CALL KSPGetIterationNumber(kspObj, numit, perr)
CALL KSPGetConvergedReason(kspObj,reason,perr)
CALL KSPGetResidualNorm(kspObj,residual,perr)
error=residual
IF(reason < 0) THEN
WRITE(g_out,*) ' Error: Did not Converge. Calling MPI_Abort'
WRITE(g_out,*) ' Divergence Reason:'
IF(reason == -2) THEN
WRITE(g_out,*) ' Diverged Null'
ELSE IF(reason == -3) THEN
WRITE(g_out,*) ' Diverged ITS, took ', numit, ' iterations'
ELSE IF(reason == -4) THEN
WRITE(g_out,*) ' Diverged DTOL'
ELSE IF(reason == -5) THEN
WRITE(g_out,*) ' Diverged Breakdown'
ELSE IF(reason == -6) THEN
WRITE(g_out,*) ' Diverged Breakdown BICG'
ELSE IF(reason == -7) THEN
WRITE(g_out,*) ' Diverged NonSymmetric'
ELSE IF(reason == -8) THEN
WRITE(g_out,*) ' Diverged Indefinite PC'
ELSE IF(reason == -9) THEN
WRITE(g_out,*) ' Diverged nanorinf'
ELSE IF(reason == -10) THEN
WRITE(g_out,*) ' Diverged indefinite mat'
ENDIF
CALL MPI_Abort(MPI_COMM_WORLD,errcode,mpierr)
ENDIF
total_petsc_iter = total_petsc_iter + numit
END SUBROUTINE solve_petsc
SUBROUTINE printXVec(fileName)
USE MPI
IMPLICIT NONE
# include "finclude/petscviewer.h"
CHARACTER(LEN=*) :: fileName
CHARACTER(LEN=8) :: id
PetscViewer :: viewer
! Write Global Solution Vector
CALL PetscViewerCreate(MPI_COMM_WORLD,viewer,perr)
CALL PetscViewerSetType(viewer,"ascii",perr)
CALL PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_INDEX,perr)
CALL PetscViewerFileSetName(viewer,fileName,perr)
CALL VecView(X,viewer,perr)
CALL PetscViewerDestroy(viewer,perr)
END SUBROUTINE printXVec
SUBROUTINE printBVec(fileName)
USE MPI
IMPLICIT NONE
# include "finclude/petscviewer.h"
CHARACTER(LEN=*) :: fileName
CHARACTER(LEN=8) :: id
PetscViewer :: viewer
CALL PetscViewerCreate(MPI_COMM_WORLD,viewer,perr)
CALL PetscViewerSetType(viewer,"ascii",perr)
CALL PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_INDEX,perr)
CALL PetscViewerFileSetName(viewer,fileName,perr)
CALL VecView(B,viewer,perr)
CALL PetscViewerDestroy(viewer,perr)
END SUBROUTINE printBVec
SUBROUTINE printMatA(fileName)
USE MPI
IMPLICIT NONE
# include "finclude/petscviewer.h"
CHARACTER(LEN=*) :: fileName
CHARACTER(LEN=8) :: id
PetscViewer :: viewer
CALL PetscViewerCreate(MPI_COMM_WORLD,viewer,perr)
CALL PetscViewerSetType(viewer,"ascii",perr)
CALL PetscViewerSetFormat(viewer,PETSC_VIEWER_DEFAULT,perr)
CALL PetscViewerFileSetName(viewer,fileName,perr)
CALL MatView(A,viewer,perr)
CALL PetscViewerDestroy(viewer,perr)
END SUBROUTINE printMatA
END MODULE PETScTeaLeaf