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C $Header: /u/gcmpack/MITgcm/pkg/streamice/streamice_cg_solve_petsc.F,v 1.5 2015/06/15 14:34:38 dgoldberg Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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CBOP |
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SUBROUTINE CG3D_PETSC( |
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U cg3d_x, ! solution vector |
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U cg3d_b, ! rhs |
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I tolerance, |
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U maxIter, |
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I myIter, |
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I myThid ) |
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|
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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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|
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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 "CG3D.h" |
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|
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#ifdef ALLOW_PETSC |
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#include "finclude/petsc.h" |
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#include "CG3D_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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|
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|
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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 maxiter |
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INTEGER myIter |
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_RL tolerance |
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_RL cg3d_x (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL cg3d_b (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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|
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|
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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, col_iter, 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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! LOGICAL create_mat, destroy_mat |
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|
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|
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#ifdef ALLOW_PETSC |
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INTEGER indices(Nr*(snx*nsx*sny*nsy)) |
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INTEGER cg3d_dofs_cum_sum (0:nPx*nPy*MAX_CG3D_PETSC_CPUINVERT-1), |
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& idx(1) |
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_RL rhs_values(Nr*(snx*nsx*sny*nsy)) |
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_RL solution_values(Nr*(snx*nsx*sny*nsy)) |
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_RL mat_values (7,1), mat_val_return(1) |
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INTEGER indices_col(7) |
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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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INTEGER iters |
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INTEGER color, rank |
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PC subpc |
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KSP subksp(1) |
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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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|
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|
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! print *, "GOT HERE CG3D", myByLo(mythid), myByHi(myThid), |
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! & myBxLo(mythid), myBxHi(myThid) |
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! RETURN |
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|
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#ifdef ALLOW_PETSC |
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|
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IF ((myIter.eq.1) .OR. (.not.cg3d_petsc_reuse_mat)) THEN |
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cg3d_need2create_mat = .TRUE. |
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ELSE |
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cg3d_need2create_mat = .FALSE. |
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ENDIF |
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|
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IF ((myIter.eq.nTimeSteps) .OR. (.not.cg3d_petsc_reuse_mat)) THEN |
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cg3d_need2destroy_mat = .TRUE. |
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ELSE |
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cg3d_need2destroy_mat = .FALSE. |
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ENDIF |
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|
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|
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#ifdef ALLOW_USE_MPI |
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|
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|
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CALL MPI_COMM_RANK( MPI_COMM_WORLD, mpiMyWId, mpiRC ) |
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local_dofs = cg3d_dofs_process (mpiMyWid) |
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global_dofs = 0 |
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|
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|
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cg3d_dofs_cum_sum(0) = 0 |
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|
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DO i=0,nPx*nPy*MAX_CG3D_PETSC_CPUINVERT-1 |
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IF (i.le.cg3d_petsc_cpuInVert) THEN |
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global_dofs = global_dofs + cg3d_dofs_process (i) |
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if (i.ge.1) then |
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cg3d_dofs_cum_sum(i) = cg3d_dofs_cum_sum(i-1)+ |
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& cg3d_dofs_process(i-1) |
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endif |
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ENDIF |
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ENDDO |
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|
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local_offset = cg3d_dofs_cum_sum(mpimywid) |
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|
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#else |
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|
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local_dofs = cg3d_dofs_process (0) |
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global_dofs = local_dofs |
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local_offset = 0 |
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|
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#endif |
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|
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|
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!---------------------- |
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|
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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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|
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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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|
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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,Nr*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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|
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! gather rhs and initial guess values to populate petsc vectors |
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|
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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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DO k=1,Nr |
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|
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color = INT(cg3d_petsc_color(i,j,k,bi,bj)) |
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rank = cg3d_color_rank (color) |
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dof_index = INT(cg3d_petsc_dofs(i,j,k,bi,bj)) |
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& - local_offset |
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|
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if (dof_index.ge.0 .and. rank.eq.mpimywid) THEN |
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|
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rhs_values(dof_index+1) = cg3d_b(i,j,k,bi,bj) |
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solution_values(dof_index+1) = cg3d_x(i,j,k,bi,bj) |
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|
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endif |
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|
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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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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|
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|
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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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|
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|
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|
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if (cg3d_need2create_mat) then |
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CALL TIMER_START ('CG3D_PETSC_MATCREATE',myThid) |
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|
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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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& 7, PETSC_NULL_INTEGER, |
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& 7, PETSC_NULL_INTEGER, |
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& matrix_petsc_cg3d, ierr) |
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|
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|
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! populate petsc matrix |
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|
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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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DO k=1,Nr |
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|
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dof_index = INT(cg3d_petsc_dofs(i,j,k,bi,bj)) |
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! & - local_offset |
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color = INT(cg3d_petsc_color(i,j,k,bi,bj)) |
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rank = cg3d_color_rank (color) |
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|
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IF (dof_index .ge. 0 .and. rank.eq.mpimywid) THEN |
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|
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DO col_iter=1,7 |
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indices_col(col_iter) = 0 |
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mat_values(col_iter,1) = 0. _d 0 |
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ENDDO |
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col_iter = 0 |
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|
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! ASSUME THE STENCIL |
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! ac3d (i,j,k) --> 1 |
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! aw3d (i,j,k) --> 2 |
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! as3d (i,j,k) --> 3 |
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! av3d (i,j,k) --> 4 |
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! aw3d (i+1,j,k) --> 5 |
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! as3d (i,j+1,k) --> 6 |
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! av3d (i,j,k+1) --> 7 |
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|
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dof_index_col = cg3d_petsc_dofs(i,j,k,bi,bj) |
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if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = ac3d(i,j,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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|
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dof_index_col = cg3d_petsc_dofs(i-1,j,k,bi,bj) |
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if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = aw3d(i,j,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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|
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dof_index_col = cg3d_petsc_dofs(i,j-1,k,bi,bj) |
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if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = as3d(i,j,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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|
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if (k.gt.1) then |
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dof_index_col = cg3d_petsc_dofs(i,j,k-1,bi,bj) |
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if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = av3d(i,j,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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endif |
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|
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dof_index_col = cg3d_petsc_dofs(i+1,j,k,bi,bj) |
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if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = aw3d(i+1,j,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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|
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dof_index_col = cg3d_petsc_dofs(i,j+1,k,bi,bj) |
| 275 |
if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = as3d(i,j+1,k,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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|
| 281 |
if (k.lt.Nr) then |
| 282 |
dof_index_col = cg3d_petsc_dofs(i,j,k+1,bi,bj) |
| 283 |
if (dof_index_col.ge.0) then |
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col_iter = col_iter + 1 |
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mat_values(col_iter,1) = av3d(i,j,k+1,bi,bj) |
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indices_col(col_iter) = dof_index_col |
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endif |
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endif |
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|
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|
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call matSetValues (matrix_petsc_cg3d, 1, dof_index, col_iter, |
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& indices_col, |
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& mat_values,INSERT_VALUES,ierr) |
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|
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|
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ENDIF |
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|
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|
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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call MatAssemblyBegin(matrix_petsc_cg3d,MAT_FINAL_ASSEMBLY,ierr) |
| 306 |
call MatAssemblyEnd(matrix_petsc_cg3d,MAT_FINAL_ASSEMBLY,ierr) |
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|
| 308 |
|
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call KSPCreate(PETSC_COMM_WORLD, ksp_cg3d, ierr) |
| 310 |
call KSPSetOperators(ksp_cg3d, |
| 311 |
& matrix_petsc_cg3d, matrix_petsc_cg3d, |
| 312 |
& DIFFERENT_NONZERO_PATTERN, ierr) |
| 313 |
|
| 314 |
IF (CG3D_PETSC_PRECOND_TYPE.eq.'MUMPS') then |
| 315 |
call KSPSetType(ksp_cg3d,KSPPREONLY,ierr) |
| 316 |
ELSE |
| 317 |
SELECT CASE (CG3D_PETSC_SOLVER_TYPE) |
| 318 |
CASE ('CG') |
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PRINT *, "PETSC SOLVER: SELECTED CG" |
| 320 |
call KSPSetType(ksp_cg3d, KSPCG, ierr) |
| 321 |
CASE ('GMRES') |
| 322 |
PRINT *, "PETSC SOLVER: SELECTED GMRES" |
| 323 |
call KSPSetType(ksp_cg3d, KSPGMRES, ierr) |
| 324 |
CASE ('BICG') |
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PRINT *, "PETSC SOLVER: SELECTED BICG" |
| 326 |
call KSPSetType(ksp_cg3d, KSPBICG, ierr) |
| 327 |
CASE DEFAULT |
| 328 |
PRINT *, "PETSC SOLVER: SELECTED DEFAULT" |
| 329 |
call KSPSetType(ksp_cg3d, KSPCG, ierr) |
| 330 |
END SELECT |
| 331 |
ENDIF |
| 332 |
|
| 333 |
call KSPGetPC(ksp_cg3d, pc_cg3d, ierr) |
| 334 |
call KSPSetTolerances(ksp_cg3d,tolerance, |
| 335 |
& PETSC_DEFAULT_DOUBLE_PRECISION, |
| 336 |
& PETSC_DEFAULT_DOUBLE_PRECISION, |
| 337 |
& maxiter,ierr) |
| 338 |
|
| 339 |
SELECT CASE (CG3D_PETSC_PRECOND_TYPE) |
| 340 |
CASE ('BLOCKJACOBI') |
| 341 |
PRINT *, "PETSC PRECOND: SELECTED BJACOBI" |
| 342 |
call PCSetType(pc_cg3d, PCBJACOBI, ierr) |
| 343 |
call kspsetup (ksp_cg3d, ierr) |
| 344 |
call PCBJacobiGetSubKSP (pc_cg3d,PETSC_NULL_INTEGER, |
| 345 |
& PETSC_NULL_INTEGER, |
| 346 |
& subksp,ierr); |
| 347 |
call KSPGetPC (subksp, subpc, ierr) |
| 348 |
call PCSetType (subpc, PCILU, ierr) |
| 349 |
! call PCFactorSetLevels(subpc,0,ierr) |
| 350 |
CASE ('JACOBI') |
| 351 |
PRINT *, "PETSC PRECOND: SELECTED JACOBI" |
| 352 |
call PCSetType(pc_cg3d, PCJACOBI, ierr) |
| 353 |
CASE ('ILU') |
| 354 |
PRINT *, "PETSC PRECOND: SELECTED ILU" |
| 355 |
call PCSetType(pc_cg3d, PCILU, ierr) |
| 356 |
|
| 357 |
CASE ('GAMG') |
| 358 |
PRINT *, "PETSC PRECOND: SELECTED GAMG" |
| 359 |
call PCSetType(pc_cg3d, PCGAMG, ierr) |
| 360 |
call PCGAMGSetCoarseEqLim(pc_cg3d,10000,ierr) |
| 361 |
call PCGAMGSetSymGraph(pc_cg3d, PETSC_TRUE,ierr) |
| 362 |
call PCGAMGSetNSmooths(pc_cg3d, 0,ierr) |
| 363 |
call PCGAMGSetThreshold(pc_cg3d, .001,ierr) |
| 364 |
! call PCGAMGSetReuseProl(pc,PETSC_FALSE,ierr) |
| 365 |
call kspsetup (ksp_cg3d, ierr) |
| 366 |
|
| 367 |
CASE ('MUMPS') |
| 368 |
PRINT *, "PETSC PRECOND: SELECTED MUMPS" |
| 369 |
call PCSetType(pc_cg3d,PCLU,ierr) |
| 370 |
call PCFactorSetMatSolverPackage(pc_cg3d,MATSOLVERMUMPS,ierr) |
| 371 |
call PCFactorSetUpMatSolverPackage(pc_cg3d,ierr) |
| 372 |
call PCFactorGetMatrix(pc_cg3d,mumpsFac_cg3d,ierr) |
| 373 |
call MatMumpsSetIcntl(mumpsfac_cg3d,7,2,ierr) |
| 374 |
call MatMumpsSetIcntl(mumpsfac_cg3d,24,1,ierr) |
| 375 |
! call MatMumpsSetCntl(mumpsfac,3,2.e-6,ierr) |
| 376 |
call kspsetup (ksp_cg3d, ierr) |
| 377 |
|
| 378 |
CASE DEFAULT |
| 379 |
PRINT *, "PETSC PRECOND: SELECTED DEFAULT" |
| 380 |
call PCSetType(pc_cg3d, PCBJACOBI, ierr) |
| 381 |
END SELECT |
| 382 |
|
| 383 |
|
| 384 |
CALL TIMER_STOP ('CG3D_PETSC_MATCREATE',myThid) |
| 385 |
endif ! need3create_mat |
| 386 |
|
| 387 |
|
| 388 |
CALL TIMER_START ('CG3D_PETSC_SOLVE',myThid) |
| 389 |
|
| 390 |
call KSPSolve(ksp_cg3d, rhs, solution, ierr) |
| 391 |
|
| 392 |
|
| 393 |
CALL TIMER_STOP ('CG3D_PETSC_SOLVE',myThid) |
| 394 |
|
| 395 |
call KSPGetIterationNumber(ksp_cg3d,iters,ierr) |
| 396 |
|
| 397 |
maxIter = iters |
| 398 |
|
| 399 |
call VecGetValues(solution,local_dofs,indices, |
| 400 |
& solution_values,ierr) |
| 401 |
|
| 402 |
DO bj = myByLo(myThid), myByHi(myThid) |
| 403 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 404 |
DO j=1,sNy |
| 405 |
DO i=1,sNx |
| 406 |
DO k=1,Nr |
| 407 |
|
| 408 |
dof_index = INT(cg3d_petsc_dofs(i,j,k,bi,bj)) |
| 409 |
& - local_offset |
| 410 |
color = INT(cg3d_petsc_color(i,j,k,bi,bj)) |
| 411 |
rank = cg3d_color_rank (color) |
| 412 |
if (dof_index.ge.0.and.rank.eq.mpimywid) THEN |
| 413 |
cg3d_x(i,j,k,bi,bj) = solution_values(dof_index+1) |
| 414 |
endif |
| 415 |
|
| 416 |
ENDDO |
| 417 |
ENDDO |
| 418 |
ENDDO |
| 419 |
ENDDO |
| 420 |
ENDDO |
| 421 |
|
| 422 |
if (cg3d_need2destroy_mat) then |
| 423 |
call KSPDestroy (ksp_cg3d, ierr) |
| 424 |
call MatDestroy (matrix_petsc_cg3d, ierr) |
| 425 |
endif |
| 426 |
call VecDestroy (rhs, ierr) |
| 427 |
call VecDestroy (solution, ierr) |
| 428 |
|
| 429 |
|
| 430 |
|
| 431 |
|
| 432 |
#endif |
| 433 |
|
| 434 |
|
| 435 |
|
| 436 |
RETURN |
| 437 |
END |
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