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dgoldberg |
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C $Header: /u/gcmpack/MITgcm/pkg/streamice/streamice_cg_solve_petsc.F,v 1.1 2013/08/24 20:32:03 dgoldberg Exp $ |
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C $Name: $ |
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#include "STREAMICE_OPTIONS.h" |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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SUBROUTINE STREAMICE_CG_SOLVE_PETSC( |
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U cg_Uin, ! x-velocities |
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U cg_Vin, ! y-velocities |
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I cg_Bu, ! force in x dir |
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I cg_Bv, ! force in y dir |
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I A_uu, ! section of matrix that multiplies u and projects on u |
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I A_uv, ! section of matrix that multiplies v and projects on u |
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I A_vu, ! section of matrix that multiplies u and projects on v |
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I A_vv, ! section of matrix that multiplies v and projects on v |
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I tolerance, |
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O iters, |
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I maxIter, |
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I myThid ) |
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C /============================================================\ |
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C | SUBROUTINE | |
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C | o | |
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C |============================================================| |
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C | | |
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C \============================================================/ |
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IMPLICIT NONE |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "STREAMICE.h" |
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#include "STREAMICE_CG.h" |
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#ifdef ALLOW_PETSC |
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#include "finclude/petsc.h" |
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! UNCOMMENT IF V3.0 |
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!#include "finclude/petscvec.h" |
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!#include "finclude/petscmat.h" |
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!#include "finclude/petscksp.h" |
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!#include "finclude/petscpc.h" |
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#endif |
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C === Global variables === |
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C !INPUT/OUTPUT ARGUMENTS |
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C cg_Uin, cg_Vin - input and output velocities |
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C cg_Bu, cg_Bv - driving stress |
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INTEGER myThid |
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INTEGER iters, maxiter |
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_RL tolerance |
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_RL cg_Uin (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL cg_Vin (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL cg_Bu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL cg_Bv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL |
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& A_uu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1), |
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& A_vu (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1), |
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& A_uv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1), |
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& A_vv (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy,-1:1,-1:1) |
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C LOCAL VARIABLES |
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INTEGER i, j, bi, bj, cg_halo, conv_flag |
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INTEGER iter, is, js, ie, je, colx, coly, k |
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_RL dot_p1, dot_p2, alpha_k, beta_k, resid, resid_0 |
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_RL dot_p1_tile (nSx,nSy) |
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_RL dot_p2_tile (nSx,nSy) |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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#ifdef ALLOW_PETSC |
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INTEGER indices(2*(snx*nsx*sny*nsy)) |
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INTEGER n_dofs_cum_sum (0:nPx*nPy-1), idx(1) |
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_RL rhs_values(2*(snx*nsx*sny*nsy)) |
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_RL solution_values(2*(snx*nsx*sny*nsy)) |
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! _RL mat_values (2*Nx*Ny,2*(snx*nsx*sny*nsy)) |
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_RL mat_values (18,1), mat_val_return(1) |
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INTEGER indices_col(18) |
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INTEGER local_dofs, global_dofs, dof_index, dof_index_col |
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INTEGER local_offset |
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Mat matrix |
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KSP ksp |
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PC pc |
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Vec rhs |
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Vec solution |
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PetscErrorCode ierr |
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#ifdef ALLOW_USE_MPI |
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integer mpiRC, mpiMyWid |
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#endif |
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#endif |
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#ifdef ALLOW_STREAMICE |
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#ifdef ALLOW_PETSC |
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#ifdef ALLOW_USE_MPI |
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CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpiMyWId, mpiRC ) |
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local_dofs = n_dofs_process (mpiMyWid) |
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global_dofs = 0 |
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n_dofs_cum_sum(0) = 0 |
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DO i=0,nPx*nPy-1 |
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global_dofs = global_dofs + n_dofs_process (i) |
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if (i.ge.1) THEN |
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n_dofs_cum_sum(i) = n_dofs_cum_sum(i-1)+ |
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& n_dofs_process(i-1) |
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endif |
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ENDDO |
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local_offset = n_dofs_cum_sum(mpimywid) |
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#else |
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local_dofs = n_dofs_process (0) |
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global_dofs = local_dofs |
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local_offset = 0 |
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#endif |
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! call petscInitialize(PETSC_NULL_CHARACTER,ierr) |
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!---------------------- |
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call VecCreate(PETSC_COMM_WORLD, rhs, ierr) |
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call VecSetSizes(rhs, local_dofs, global_dofs, ierr) |
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call VecSetType(rhs, VECMPI, ierr) |
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call VecCreate(PETSC_COMM_WORLD, solution, ierr) |
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call VecSetSizes(solution, local_dofs, global_dofs, ierr) |
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call VecSetType(solution, VECMPI, ierr) |
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do i=1,local_dofs |
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indices(i) = i-1 + local_offset |
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end do |
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do i=1,2*nSx*nSy*sNx*sNy |
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rhs_values (i) = 0. _d 0 |
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solution_values (i) = 0. _d 0 |
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enddo |
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! gather rhs and initial guess values to populate petsc vectors |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO j=1,sNy |
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DO i=1,sNx |
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dof_index = INT(streamice_petsc_dofs_u(i,j,bi,bj)) |
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& - local_offset |
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if (dof_index.ge.0) THEN |
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rhs_values(dof_index+1) = cg_Bu(i,j,bi,bj) |
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solution_values(dof_index+1) = cg_Uin(i,j,bi,bj) |
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endif |
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!--------------- |
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dof_index = INT(streamice_petsc_dofs_v(i,j,bi,bj)) |
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& - local_offset |
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if (dof_index.ge.0) THEN |
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rhs_values(dof_index+1) = cg_Bv(i,j,bi,bj) |
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solution_values(dof_index+1) = cg_Vin(i,j,bi,bj) |
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endif |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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call VecSetValues(rhs, local_dofs, indices, rhs_values, |
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& INSERT_VALUES, ierr) |
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call VecAssemblyBegin(rhs, ierr) |
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call VecAssemblyEnd(rhs, ierr) |
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call VecSetValues(solution, local_dofs, indices, |
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& solution_values, INSERT_VALUES, ierr) |
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call VecAssemblyBegin(solution, ierr) |
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call VecAssemblyEnd(solution, ierr) |
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! IF USING v3.0 THEN |
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! call MatCreateMPIAIJ (PETSC_COMM_WORLD, |
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call MatCreateAIJ (PETSC_COMM_WORLD, |
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& local_dofs, local_dofs, |
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& global_dofs, global_dofs, |
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& 18, PETSC_NULL_INTEGER, |
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& 18, PETSC_NULL_INTEGER, |
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& matrix, ierr) |
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! populate petsc matrix |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO j=1,sNy |
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DO i=1,sNx |
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dof_index = INT(streamice_petsc_dofs_u(i,j,bi,bj)) |
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! & - local_offset |
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IF (dof_index .ge. 0) THEN |
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DO k=1,18 |
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indices_col(k) = 0 |
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mat_values(k,1) = 0. _d 0 |
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ENDDO |
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k=0 |
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DO coly=-1,1 |
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DO colx=-1,1 |
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dof_index_col = streamice_petsc_dofs_u(i+colx,j+coly,bi,bj) |
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if (dof_index_col.ge.0) THEN |
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! pscal = A_uu(i,j,bi,bj,colx,coly) |
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! CALL MatSetValue (matrix,dof_index, dof_index_col, |
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! & pscal,INSERT_VALUES,ierr) |
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k=k+1 |
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mat_values (k,1) = A_uu(i,j,bi,bj,colx,coly) |
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indices_col (k) = dof_index_col |
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endif |
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dof_index_col = streamice_petsc_dofs_v(i+colx,j+coly,bi,bj) |
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if (dof_index_col.ge.0) THEN |
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! CALL MatSetValue (matrix,dof_index, dof_index_col, |
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! & A_uv(i,j,bi,bj,colx,coly),INSERT_VALUES,ierr) |
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k=k+1 |
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mat_values (k,1) = A_uv(i,j,bi,bj,colx,coly) |
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indices_col (k) = dof_index_col |
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endif |
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ENDDO |
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ENDDO |
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call matSetValues (matrix, 1, dof_index, k, indices_col, |
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& mat_values,INSERT_VALUES,ierr) |
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ENDIF |
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! ---------------------------------------------- |
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dof_index = INT(streamice_petsc_dofs_v(i,j,bi,bj)) |
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! & - local_offset |
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IF (dof_index .ge. 0) THEN |
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DO k=1,18 |
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indices_col(k) = 0 |
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mat_values(k,1) = 0. _d 0 |
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ENDDO |
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k=0 |
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DO coly=-1,1 |
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DO colx=-1,1 |
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dof_index_col = streamice_petsc_dofs_u(i+colx,j+coly,bi,bj) |
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if (dof_index_col.ge.0) THEN |
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! CALL MatSetValue (matrix,dof_index, dof_index_col, |
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! & A_vu(i,j,bi,bj,colx,coly),INSERT_VALUES,ierr) |
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k=k+1 |
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mat_values (k,1) = A_vu(i,j,bi,bj,colx,coly) |
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indices_col (k) = dof_index_col |
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endif |
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dof_index_col = streamice_petsc_dofs_v(i+colx,j+coly,bi,bj) |
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if (dof_index_col.ge.0) THEN |
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! CALL MatSetValue (matrix,dof_index, dof_index_col, |
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! & A_vv(i,j,bi,bj,colx,coly),INSERT_VALUES,ierr) |
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k=k+1 |
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mat_values (k,1) = A_vv(i,j,bi,bj,colx,coly) |
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indices_col (k) = dof_index_col |
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endif |
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ENDDO |
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ENDDO |
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call matSetValues (matrix, 1, dof_index, k, indices_col, |
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& mat_values,INSERT_VALUES,ierr) |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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call MatAssemblyBegin(matrix,MAT_FINAL_ASSEMBLY,ierr) |
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call MatAssemblyEnd(matrix,MAT_FINAL_ASSEMBLY,ierr) |
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call KSPCreate(PETSC_COMM_WORLD, ksp, ierr) |
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call KSPSetOperators(ksp, matrix, matrix, |
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& DIFFERENT_NONZERO_PATTERN, ierr) |
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SELECT CASE (PETSC_SOLVER_TYPE) |
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CASE ('CG') |
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PRINT *, "PETSC SOLVER: SELECTED CG" |
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call KSPSetType(ksp, KSPCG, ierr) |
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CASE ('GMRES') |
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PRINT *, "PETSC SOLVER: SELECTED GMRES" |
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call KSPSetType(ksp, KSPGMRES, ierr) |
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CASE ('BICG') |
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PRINT *, "PETSC SOLVER: SELECTED BICG" |
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call KSPSetType(ksp, KSPBICG, ierr) |
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CASE DEFAULT |
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PRINT *, "PETSC SOLVER: SELECTED DEFAULT" |
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call KSPSetType(ksp, KSPCG, ierr) |
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END SELECT |
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call KSPGetPC(ksp, pc, ierr) |
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call KSPSetTolerances(ksp,tolerance, |
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& PETSC_DEFAULT_DOUBLE_PRECISION, |
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& PETSC_DEFAULT_DOUBLE_PRECISION, |
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& maxiter,ierr) |
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SELECT CASE (PETSC_PRECOND_TYPE) |
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CASE ('BLOCKJACOBI') |
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PRINT *, "PETSC PRECOND: SELECTED BJACOBI" |
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call PCSetType(pc, PCBJACOBI, ierr) |
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CASE ('JACOBI') |
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PRINT *, "PETSC PRECOND: SELECTED JACOBI" |
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call PCSetType(pc, PCJACOBI, ierr) |
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CASE ('ILU') |
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PRINT *, "PETSC PRECOND: SELECTED ILU" |
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call PCSetType(pc, PCILU, ierr) |
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CASE DEFAULT |
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PRINT *, "PETSC PRECOND: SELECTED DEFAULT" |
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call PCSetType(pc, PCBJACOBI, ierr) |
| 345 |
|
|
END SELECT |
| 346 |
|
|
|
| 347 |
|
|
|
| 348 |
|
|
call KSPSolve(ksp, rhs, solution, ierr) |
| 349 |
|
|
call KSPGetIterationNumber(ksp,iters,ierr) |
| 350 |
|
|
|
| 351 |
|
|
call VecGetValues(solution,local_dofs,indices, |
| 352 |
|
|
& solution_values,ierr) |
| 353 |
|
|
|
| 354 |
|
|
DO bj = myByLo(myThid), myByHi(myThid) |
| 355 |
|
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 356 |
|
|
DO j=1,sNy |
| 357 |
|
|
DO i=1,sNx |
| 358 |
|
|
|
| 359 |
|
|
dof_index = INT(streamice_petsc_dofs_u(i,j,bi,bj)) |
| 360 |
|
|
& - local_offset |
| 361 |
|
|
if (dof_index.ge.0) THEN |
| 362 |
|
|
cg_Uin(i,j,bi,bj) = solution_values(dof_index+1) |
| 363 |
|
|
endif |
| 364 |
|
|
|
| 365 |
|
|
dof_index = INT(streamice_petsc_dofs_v(i,j,bi,bj)) |
| 366 |
|
|
& - local_offset |
| 367 |
|
|
if (dof_index.ge.0) THEN |
| 368 |
|
|
cg_Vin(i,j,bi,bj) = solution_values(dof_index+1) |
| 369 |
|
|
endif |
| 370 |
|
|
|
| 371 |
|
|
ENDDO |
| 372 |
|
|
ENDDO |
| 373 |
|
|
ENDDO |
| 374 |
|
|
ENDDO |
| 375 |
|
|
|
| 376 |
|
|
call KSPDestroy (ksp, ierr) |
| 377 |
|
|
call VecDestroy (rhs, ierr) |
| 378 |
|
|
call VecDestroy (solution, ierr) |
| 379 |
|
|
call MatDestroy (matrix, ierr) |
| 380 |
|
|
|
| 381 |
|
|
|
| 382 |
|
|
! call PetscFinalize(ierr) |
| 383 |
|
|
|
| 384 |
|
|
|
| 385 |
|
|
#endif |
| 386 |
|
|
|
| 387 |
|
|
|
| 388 |
|
|
|
| 389 |
|
|
#endif |
| 390 |
|
|
RETURN |
| 391 |
|
|
END |
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