C++ MatDestroy函数代码示例

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本文整理汇总了C++中MatDestroy函数的典型用法代码示例。如果您正苦于以下问题：C++ MatDestroy函数的具体用法？C++ MatDestroy怎么用？C++ MatDestroy使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了MatDestroy函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: main

int main(int argc,char **args)
{
  Mat            A,B;
  PetscErrorCode ierr;
  char           file[PETSC_MAX_PATH_LEN];
  PetscBool      flg;
  PetscViewer    fd;
  MatType        type = MATMPIBAIJ;

  PetscInitialize(&argc,&args,(char*)0,help);
  ierr = PetscOptionsHasName(NULL,"-aij",&flg);CHKERRQ(ierr);
  if (flg) type = MATMPIAIJ;

  ierr = PetscOptionsGetString(NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr);
  if (!flg) SETERRQ(PETSC_COMM_WORLD,1,"Must indicate binary file with the -f option");

  /*
     Open binary file.  Note that we use FILE_MODE_READ to indicate
     reading from this file.
  */
  ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);CHKERRQ(ierr);

  /*
     Load the matrix; then destroy the viewer.
  */
  ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
  ierr = MatSetType(A,type);CHKERRQ(ierr);
  ierr = MatSetFromOptions(A);CHKERRQ(ierr);
  ierr = MatLoad(A,fd);CHKERRQ(ierr);
  ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr);

  /*
     Open another binary file.  Note that we use FILE_MODE_WRITE to indicate
     reading from this file.
  */
  ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"fileoutput",FILE_MODE_WRITE,&fd);CHKERRQ(ierr);
  ierr = PetscViewerBinarySetFlowControl(fd,3);CHKERRQ(ierr);
  /*
     Save the matrix and vector; then destroy the viewer.
  */
  ierr = MatView(A,fd);CHKERRQ(ierr);
  ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr);

  /* load the new matrix */
  ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"fileoutput",FILE_MODE_READ,&fd);CHKERRQ(ierr);
  ierr = MatCreate(PETSC_COMM_WORLD,&B);CHKERRQ(ierr);
  ierr = MatSetType(B,type);CHKERRQ(ierr);
  ierr = MatSetFromOptions(B);CHKERRQ(ierr);
  ierr = MatLoad(B,fd);CHKERRQ(ierr);
  ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr);

  ierr = MatEqual(A,B,&flg);CHKERRQ(ierr);
  if (flg) {
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Matrices are equal\n");CHKERRQ(ierr);
  } else {
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Matrices are not equal\n");CHKERRQ(ierr);
  }

  ierr = MatDestroy(&A);CHKERRQ(ierr);
  ierr = MatDestroy(&B);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return 0;
}

开发者ID:hsahasra，项目名称:petsc-magma-dense-mat，代码行数:63，代码来源:ex136.c

示例2: main


//.........这里部分代码省略.........
  ierr = PetscOptionsGetInt(PETSC_NULL,"-m",&m,PETSC_NULL);CHKERRQ(ierr);
  n = m;
  ierr = PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);CHKERRQ(ierr);

  ierr = MatCreate(PETSC_COMM_WORLD,&C);CHKERRQ(ierr);
  ierr = MatSetSizes(C,m,n,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr);
  ierr = MatSetType(C,MATELEMENTAL);CHKERRQ(ierr);
  ierr = MatSetFromOptions(C);CHKERRQ(ierr);
  ierr = MatSetUp(C);CHKERRQ(ierr);

  ierr = PetscOptionsHasName(PETSC_NULL,"-row_oriented",&flg);CHKERRQ(ierr);
  if (flg) {ierr = MatSetOption(C,MAT_ROW_ORIENTED,PETSC_TRUE);CHKERRQ(ierr);}
  ierr = MatGetOwnershipIS(C,&isrows,&iscols);CHKERRQ(ierr);
  ierr = PetscOptionsHasName(PETSC_NULL,"-Cexp_view_ownership",&flg);CHKERRQ(ierr);
  if (flg) { // View ownership of explicit C
    IS tmp;
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Ownership of explicit C:\n");CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Row index set:\n");CHKERRQ(ierr);
    ierr = ISOnComm(isrows,PETSC_COMM_WORLD,PETSC_USE_POINTER,&tmp);CHKERRQ(ierr);
    ierr = ISView(tmp,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    ierr = ISDestroy(&tmp);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Column index set:\n");CHKERRQ(ierr);
    ierr = ISOnComm(iscols,PETSC_COMM_WORLD,PETSC_USE_POINTER,&tmp);CHKERRQ(ierr);
    ierr = ISView(tmp,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    ierr = ISDestroy(&tmp);CHKERRQ(ierr);
  }

  // Set local matrix entries
  ierr = ISGetLocalSize(isrows,&nrows);CHKERRQ(ierr);
  ierr = ISGetIndices(isrows,&rows);CHKERRQ(ierr);
  ierr = ISGetLocalSize(iscols,&ncols);CHKERRQ(ierr);
  ierr = ISGetIndices(iscols,&cols);CHKERRQ(ierr);
  ierr = PetscMalloc(nrows*ncols*sizeof(*v),&v);CHKERRQ(ierr);
  for (i=0; i<nrows; i++) {
    for (j=0; j<ncols; j++) {
      //v[i*ncols+j] = (PetscReal)(rank);
      v[i*ncols+j] = (PetscReal)(rank*10000+100*rows[i]+cols[j]);
    }
  }
  ierr = MatSetValues(C,nrows,rows,ncols,cols,v,INSERT_VALUES);CHKERRQ(ierr);
  ierr = ISRestoreIndices(isrows,&rows);CHKERRQ(ierr);
  ierr = ISRestoreIndices(iscols,&cols);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);

  // Test MatView()
  if (mats_view){
    ierr = MatView(C,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
  }

  // Set unowned matrix entries - add subdiagonals and diagonals from proc[0]
  if (rank == 0) {
    PetscInt M,N,cols[2];
    ierr = MatGetSize(C,&M,&N);CHKERRQ(ierr);
    for (i=0; i<M; i++){
      cols[0] = i;   v[0] = i + 0.5;
      cols[1] = i-1; v[1] = 0.5;
      if (i) {
        ierr = MatSetValues(C,1,&i,2,cols,v,ADD_VALUES);CHKERRQ(ierr);
      } else {
        ierr = MatSetValues(C,1,&i,1,&i,v,ADD_VALUES);CHKERRQ(ierr);
      }
    }
  }
  ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);

  // Test MatMult()
  ierr = MatComputeExplicitOperator(C,&Caij);CHKERRQ(ierr);
  ierr = MatMultEqual(C,Caij,5,&flg);CHKERRQ(ierr);
  if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultEqual() fails");
  ierr = MatMultTransposeEqual(C,Caij,5,&flg);CHKERRQ(ierr);
  if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultTransposeEqual() fails");

  // Test MatMultAdd() and MatMultTransposeAddEqual()
  ierr = MatMultAddEqual(C,Caij,5,&flg);CHKERRQ(ierr);
  if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultAddEqual() fails");
  ierr = MatMultTransposeAddEqual(C,Caij,5,&flg);CHKERRQ(ierr);
  if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"C != Caij. MatMultTransposeAddEqual() fails");

  // Test MatMatMult()
  ierr = PetscOptionsHasName(PETSC_NULL,"-test_matmatmult",&Test_MatMatMult);CHKERRQ(ierr);
  if (Test_MatMatMult){
    Mat CCelem,CCaij;
    ierr = MatMatMult(C,C,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&CCelem);CHKERRQ(ierr);
    ierr = MatMatMult(Caij,Caij,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&CCaij);CHKERRQ(ierr);
    ierr = MatMultEqual(CCelem,CCaij,5,&flg);CHKERRQ(ierr);
    if (!flg) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NOTSAMETYPE,"CCelem != CCaij. MatMatMult() fails");
    ierr = MatDestroy(&CCaij);CHKERRQ(ierr);
    ierr = MatDestroy(&CCelem);CHKERRQ(ierr);
  }

  ierr = PetscFree(v);CHKERRQ(ierr);
  ierr = ISDestroy(&isrows);CHKERRQ(ierr);
  ierr = ISDestroy(&iscols);CHKERRQ(ierr);
  ierr = MatDestroy(&C);CHKERRQ(ierr);
  ierr = MatDestroy(&Caij);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return 0;
}

开发者ID:erdc-cm，项目名称:petsc-dev，代码行数:101，代码来源:ex38.c

示例3: test1_DAInjection3d

PetscErrorCode test1_DAInjection3d(PetscInt mx, PetscInt my, PetscInt mz)
{
  PetscErrorCode   ierr;
  DM               dac,daf;
  PetscViewer      vv;
  Vec              ac,af;
  PetscInt         periodicity;
  DMBoundaryType   bx,by,bz;

  PetscFunctionBeginUser;
  bx = DM_BOUNDARY_NONE;
  by = DM_BOUNDARY_NONE;
  bz = DM_BOUNDARY_NONE;

  periodicity = 0;

  ierr = PetscOptionsGetInt(NULL,"-periodic", &periodicity, NULL);CHKERRQ(ierr);
  if (periodicity==1) {
    bx = DM_BOUNDARY_PERIODIC;
  } else if (periodicity==2) {
    by = DM_BOUNDARY_PERIODIC;
  } else if (periodicity==3) {
    bz = DM_BOUNDARY_PERIODIC;
  }

  ierr = DMDACreate3d(PETSC_COMM_WORLD, bx,by,bz, DMDA_STENCIL_BOX,
                      mx+1, my+1,mz+1,
                      PETSC_DECIDE, PETSC_DECIDE,PETSC_DECIDE,
                      1, /* 1 dof */
                      1, /* stencil = 1 */
                      NULL,NULL,NULL,
                      &daf);CHKERRQ(ierr);

  ierr = DMSetFromOptions(daf);CHKERRQ(ierr);

  ierr = DMCoarsen(daf,MPI_COMM_NULL,&dac);CHKERRQ(ierr);

  ierr = DMDASetUniformCoordinates(dac, -1.0,1.0, -1.0,1.0, -1.0,1.0);CHKERRQ(ierr);
  ierr = DMDASetUniformCoordinates(daf, -1.0,1.0, -1.0,1.0, -1.0,1.0);CHKERRQ(ierr);

  {
    DM         cdaf,cdac;
    Vec        coordsc,coordsf,coordsf2;
    VecScatter inject;
    Mat        interp;
    PetscReal  norm;

    ierr = DMGetCoordinateDM(dac,&cdac);CHKERRQ(ierr);
    ierr = DMGetCoordinateDM(daf,&cdaf);CHKERRQ(ierr);

    ierr = DMGetCoordinates(dac,&coordsc);CHKERRQ(ierr);
    ierr = DMGetCoordinates(daf,&coordsf);CHKERRQ(ierr);

    ierr = DMCreateInjection(cdac,cdaf,&inject);CHKERRQ(ierr);

    ierr = VecScatterBegin(inject,coordsf,coordsc,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
    ierr = VecScatterEnd(inject  ,coordsf,coordsc,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
    ierr = VecScatterDestroy(&inject);CHKERRQ(ierr);

    ierr = DMCreateInterpolation(cdac,cdaf,&interp,NULL);CHKERRQ(ierr);
    ierr = VecDuplicate(coordsf,&coordsf2);CHKERRQ(ierr);
    ierr = MatInterpolate(interp,coordsc,coordsf2);CHKERRQ(ierr);
    ierr = VecAXPY(coordsf2,-1.0,coordsf);CHKERRQ(ierr);
    ierr = VecNorm(coordsf2,NORM_MAX,&norm);CHKERRQ(ierr);
    /* The fine coordinates are only reproduced in certain cases */
    if (!bx && !by && !bz && norm > 1.e-10) {ierr = PetscPrintf(PETSC_COMM_WORLD,"Norm %g\n",(double)norm);CHKERRQ(ierr);}
    ierr = VecDestroy(&coordsf2);CHKERRQ(ierr);
    ierr = MatDestroy(&interp);CHKERRQ(ierr);
  }

  if (0) {
    ierr = DMCreateGlobalVector(dac,&ac);CHKERRQ(ierr);
    ierr = VecZeroEntries(ac);CHKERRQ(ierr);

    ierr = DMCreateGlobalVector(daf,&af);CHKERRQ(ierr);
    ierr = VecZeroEntries(af);CHKERRQ(ierr);

    ierr = PetscViewerASCIIOpen(PETSC_COMM_WORLD, "dac_7.vtk", &vv);CHKERRQ(ierr);
    ierr = PetscViewerSetFormat(vv, PETSC_VIEWER_ASCII_VTK);CHKERRQ(ierr);
    ierr = DMView(dac, vv);CHKERRQ(ierr);
    ierr = VecView(ac, vv);CHKERRQ(ierr);
    ierr = PetscViewerDestroy(&vv);CHKERRQ(ierr);

    ierr = PetscViewerASCIIOpen(PETSC_COMM_WORLD, "daf_7.vtk", &vv);CHKERRQ(ierr);
    ierr = PetscViewerSetFormat(vv, PETSC_VIEWER_ASCII_VTK);CHKERRQ(ierr);
    ierr = DMView(daf, vv);CHKERRQ(ierr);
    ierr = VecView(af, vv);CHKERRQ(ierr);
    ierr = PetscViewerDestroy(&vv);CHKERRQ(ierr);
    ierr = VecDestroy(&ac);CHKERRQ(ierr);
    ierr = VecDestroy(&af);CHKERRQ(ierr);
  }
  ierr = DMDestroy(&dac);CHKERRQ(ierr);
  ierr = DMDestroy(&daf);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}

开发者ID:00liujj，项目名称:petsc，代码行数:95，代码来源:ex21.c

示例4: port_lsd_bfbt

PetscErrorCode port_lsd_bfbt(void)
{
  Mat            A;
  Vec            x,b;
  KSP            ksp_A;
  PC             pc_A;
  IS             isu,isp;
  PetscErrorCode ierr;

  PetscFunctionBeginUser;
  ierr = LoadTestMatrices(&A,&x,&b,&isu,&isp);CHKERRQ(ierr);

  ierr = KSPCreate(PETSC_COMM_WORLD,&ksp_A);CHKERRQ(ierr);
  ierr = KSPSetOptionsPrefix(ksp_A,"fc_");CHKERRQ(ierr);
  ierr = KSPSetOperators(ksp_A,A,A);CHKERRQ(ierr);

  ierr = KSPGetPC(ksp_A,&pc_A);CHKERRQ(ierr);
  ierr = PCSetType(pc_A,PCFIELDSPLIT);CHKERRQ(ierr);
  ierr = PCFieldSplitSetBlockSize(pc_A,2);CHKERRQ(ierr);
  ierr = PCFieldSplitSetIS(pc_A,"velocity",isu);CHKERRQ(ierr);
  ierr = PCFieldSplitSetIS(pc_A,"pressure",isp);CHKERRQ(ierr);

  ierr = KSPSetFromOptions(ksp_A);CHKERRQ(ierr);
  ierr = KSPSolve(ksp_A,b,x);CHKERRQ(ierr);

  /* Pull u,p out of x */
  {
    PetscInt    loc;
    PetscReal   max,norm;
    PetscScalar sum;
    Vec         uvec,pvec;
    VecScatter  uscat,pscat;
    Mat         A11,A22;

    /* grab matrices and create the compatable u,p vectors */
    ierr = MatCreateSubMatrix(A,isu,isu,MAT_INITIAL_MATRIX,&A11);CHKERRQ(ierr);
    ierr = MatCreateSubMatrix(A,isp,isp,MAT_INITIAL_MATRIX,&A22);CHKERRQ(ierr);

    ierr = MatCreateVecs(A11,&uvec,NULL);CHKERRQ(ierr);
    ierr = MatCreateVecs(A22,&pvec,NULL);CHKERRQ(ierr);

    /* perform the scatter from x -> (u,p) */
    ierr = VecScatterCreateWithData(x,isu,uvec,NULL,&uscat);CHKERRQ(ierr);
    ierr = VecScatterBegin(uscat,x,uvec,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
    ierr = VecScatterEnd(uscat,x,uvec,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);

    ierr = VecScatterCreateWithData(x,isp,pvec,NULL,&pscat);CHKERRQ(ierr);
    ierr = VecScatterBegin(pscat,x,pvec,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
    ierr = VecScatterEnd(pscat,x,pvec,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);

    PetscPrintf(PETSC_COMM_WORLD,"-- vector vector values --\n");
    ierr = VecMin(uvec,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Min(u)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecMax(uvec,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Max(u)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecNorm(uvec,NORM_2,&norm);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Norm(u) = %1.6f \n",(double)norm);CHKERRQ(ierr);
    ierr = VecSum(uvec,&sum);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Sum(u)  = %1.6f \n",(double)PetscRealPart(sum));CHKERRQ(ierr);

    PetscPrintf(PETSC_COMM_WORLD,"-- pressure vector values --\n");
    ierr = VecMin(pvec,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Min(p)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecMax(pvec,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Max(p)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecNorm(pvec,NORM_2,&norm);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Norm(p) = %1.6f \n",(double)norm);CHKERRQ(ierr);
    ierr = VecSum(pvec,&sum);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Sum(p)  = %1.6f \n",(double)PetscRealPart(sum));CHKERRQ(ierr);

    PetscPrintf(PETSC_COMM_WORLD,"-- Full vector values --\n");
    ierr = VecMin(x,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Min(u,p)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecMax(x,&loc,&max);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Max(u,p)  = %1.6f [loc=%D]\n",(double)max,loc);CHKERRQ(ierr);
    ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Norm(u,p) = %1.6f \n",(double)norm);CHKERRQ(ierr);
    ierr = VecSum(x,&sum);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"  Sum(u,p)  = %1.6f \n",(double)PetscRealPart(sum));CHKERRQ(ierr);

    ierr = VecScatterDestroy(&uscat);CHKERRQ(ierr);
    ierr = VecScatterDestroy(&pscat);CHKERRQ(ierr);
    ierr = VecDestroy(&uvec);CHKERRQ(ierr);
    ierr = VecDestroy(&pvec);CHKERRQ(ierr);
    ierr = MatDestroy(&A11);CHKERRQ(ierr);
    ierr = MatDestroy(&A22);CHKERRQ(ierr);
  }

  ierr = KSPDestroy(&ksp_A);CHKERRQ(ierr);
  ierr = MatDestroy(&A);CHKERRQ(ierr);
  ierr = VecDestroy(&x);CHKERRQ(ierr);
  ierr = VecDestroy(&b);CHKERRQ(ierr);
  ierr = ISDestroy(&isu);CHKERRQ(ierr);
  ierr = ISDestroy(&isp);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}

开发者ID:firedrakeproject，项目名称:petsc，代码行数:96，代码来源:ex11.c

示例5: main


//.........这里部分代码省略.........
        col = row+4; ierr = MatSetValues(A,1,&row,1,&col,&v,INSERT_VALUES);CHKERRQ(ierr);
      }
      v    = 4.0;
      ierr = MatSetValues(A,1,&row,1,&row,&v,INSERT_VALUES);CHKERRQ(ierr);
    }
  }
  ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = PetscPrintf(PETSC_COMM_WORLD, "Original matrix\n");CHKERRQ(ierr);
  ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);

  if (size > 1) {
    nsub = 1; /* one subdomain per rank */
  }
  else {
    nsub = 2; /* both subdomains on rank 0 */
  }
  if (rank) {
    jlow = Jlow+1; jhigh = Jhigh+1;
  }
  else {
    jlow = Jlow; jhigh = Jhigh;
  }
  sort_rows = PETSC_FALSE;
  ierr      = PetscOptionsGetBool(NULL,NULL, "-sort_rows", &sort_rows, NULL);CHKERRQ(ierr);
  sort_cols = PETSC_FALSE;
  ierr      = PetscOptionsGetBool(NULL,NULL, "-sort_cols", &sort_cols, NULL);CHKERRQ(ierr);
  for (l = 0; l < nsub; ++l) {
    ierr = PetscMalloc1(12, &subindices);CHKERRQ(ierr);
    k    = 0;
    for (i = 0; i < 4; ++i) {
      for (j = jlow[l]; j < jhigh[l]; ++j) {
        subindices[k] = j*4+i;
        k++;
      }
    }
    ierr = ISCreateGeneral(PETSC_COMM_SELF, 12, subindices, PETSC_OWN_POINTER, rowis+l);CHKERRQ(ierr);
    if ((sort_rows && !sort_cols) || (!sort_rows && sort_cols)) {
      ierr = ISDuplicate(rowis[l],colis+l);CHKERRQ(ierr);
    } else {
      ierr = PetscObjectReference((PetscObject)rowis[l]);CHKERRQ(ierr);
      colis[l] = rowis[l];
    }
    if (sort_rows) {
      ierr = ISSort(rowis[l]);CHKERRQ(ierr);
    }
    if (sort_cols) {
      ierr = ISSort(colis[l]);CHKERRQ(ierr);
    }
  }
  ierr = PetscMalloc1(nsub, &S);CHKERRQ(ierr);
  ierr = MatGetSubMatrices(A,nsub,rowis,colis,MAT_INITIAL_MATRIX, &S);CHKERRQ(ierr);

  show_inversions = PETSC_FALSE;

  ierr = PetscOptionsGetBool(NULL,NULL, "-show_inversions", &show_inversions, NULL);CHKERRQ(ierr);

  inversions = 0;
  for (p = 0; p < size; ++p) {
    if (p == rank) {
      ierr = PetscPrintf(PETSC_COMM_SELF, "[%D:%D]: Number of subdomains: %D:\n", rank, size, nsub);CHKERRQ(ierr);
      for (l = 0; l < nsub; ++l) {
        PetscInt i0, i1;
        ierr = PetscPrintf(PETSC_COMM_SELF, "[%D:%D]: Subdomain row IS %D:\n", rank, size, l);CHKERRQ(ierr);
        ierr = ISView(rowis[l],PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr);
        ierr = PetscPrintf(PETSC_COMM_SELF, "[%D:%D]: Subdomain col IS %D:\n", rank, size, l);CHKERRQ(ierr);
        ierr = ISView(colis[l],PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr);
        ierr = PetscPrintf(PETSC_COMM_SELF, "[%D:%D]: Submatrix %D:\n", rank, size, l);CHKERRQ(ierr);
        ierr = MatView(S[l],PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr);
        if (show_inversions) {
          ierr = MatGetOwnershipRange(S[l], &i0,&i1);CHKERRQ(ierr);
          for (i = i0; i < i1; ++i) {
            ierr = MatGetRow(S[l], i, &ncols, &cols, NULL);CHKERRQ(ierr);
            for (j = 1; j < ncols; ++j) {
              if (cols[j] < cols[j-1]) {
                ierr = PetscPrintf(PETSC_COMM_SELF, "***Inversion in row %D: col[%D] = %D < %D = col[%D]\n", i, j, cols[j], cols[j-1], j-1);CHKERRQ(ierr);
                inversions++;
              }
            }
            ierr = MatRestoreRow(S[l], i, &ncols, &cols, NULL);CHKERRQ(ierr);
          }
        }
      }
    }
    ierr = MPI_Barrier(PETSC_COMM_WORLD);CHKERRQ(ierr);
  }
  if (show_inversions) {
    ierr = MPI_Reduce(&inversions,&total_inversions,1,MPIU_INT, MPI_SUM,0,PETSC_COMM_WORLD);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "*Total inversions: %D\n", total_inversions);CHKERRQ(ierr);
  }
  ierr = MatDestroy(&A);CHKERRQ(ierr);
  for (l = 0; l < nsub; ++l) {
    ierr = MatDestroy(&(S[l]));CHKERRQ(ierr);
    ierr = ISDestroy(&(rowis[l]));CHKERRQ(ierr);
    ierr = ISDestroy(&(colis[l]));CHKERRQ(ierr);
  }
  ierr = PetscFree(S);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return ierr;
}

开发者ID:tom-klotz，项目名称:petsc，代码行数:101，代码来源:ex167.c

示例6: DMCoarsen_Plex


//.........这里部分代码省略.........
      const PetscInt    *cone;
      PetscInt           coneSize, cl, i, j, d, r;

      ierr = DMPlexVecGetClosure(dm, coordSection, coordinates, c, NULL, &cellCoords);CHKERRQ(ierr);
      /* Only works for simplices */
      for (i = 0, r = 0; i < dim+1; ++i) {
        for (j = 0; j < i; ++j, ++r) {
          for (d = 0; d < dim; ++d) e[d] = cellCoords[i*dim+d] - cellCoords[j*dim+d];
          /* FORTRAN ORDERING */
          if (dim == 2) {
            eqns[0*size+r] = PetscSqr(e[0]);
            eqns[1*size+r] = 2.0*e[0]*e[1];
            eqns[2*size+r] = PetscSqr(e[1]);
          } else {
            eqns[0*size+r] = PetscSqr(e[0]);
            eqns[1*size+r] = 2.0*e[0]*e[1];
            eqns[2*size+r] = 2.0*e[0]*e[2];
            eqns[3*size+r] = PetscSqr(e[1]);
            eqns[4*size+r] = 2.0*e[1]*e[2];
            eqns[5*size+r] = PetscSqr(e[2]);
          }
        }
      }
      ierr = MatSetUnfactored(A);CHKERRQ(ierr);
      ierr = DMPlexVecRestoreClosure(dm, coordSection, coordinates, c, NULL, &cellCoords);CHKERRQ(ierr);
      ierr = MatLUFactor(A, NULL, NULL, NULL);CHKERRQ(ierr);
      ierr = MatSolve(A, mb, mx);CHKERRQ(ierr);
      ierr = VecGetArrayRead(mx, &sol);CHKERRQ(ierr);
      ierr = DMPlexComputeCellGeometryFVM(dm, c, &vol, NULL, NULL);CHKERRQ(ierr);
      ierr = DMPlexGetCone(udm, c, &cone);CHKERRQ(ierr);
      ierr = DMPlexGetConeSize(udm, c, &coneSize);CHKERRQ(ierr);
      for (cl = 0; cl < coneSize; ++cl) {
        const PetscInt v = cone[cl] - vStart;

        if (dim == 2) {
          metric[v*4+0] += vol*coarseRatio*sol[0];
          metric[v*4+1] += vol*coarseRatio*sol[1];
          metric[v*4+2] += vol*coarseRatio*sol[1];
          metric[v*4+3] += vol*coarseRatio*sol[2];
        } else {
          metric[v*9+0] += vol*coarseRatio*sol[0];
          metric[v*9+1] += vol*coarseRatio*sol[1];
          metric[v*9+3] += vol*coarseRatio*sol[1];
          metric[v*9+2] += vol*coarseRatio*sol[2];
          metric[v*9+6] += vol*coarseRatio*sol[2];
          metric[v*9+4] += vol*coarseRatio*sol[3];
          metric[v*9+5] += vol*coarseRatio*sol[4];
          metric[v*9+7] += vol*coarseRatio*sol[4];
          metric[v*9+8] += vol*coarseRatio*sol[5];
        }
      }
      ierr = VecRestoreArrayRead(mx, &sol);CHKERRQ(ierr);
    }
    for (v = 0; v < numVertices; ++v) {
      const PetscInt *support;
      PetscInt        supportSize, s;
      PetscReal       vol, totVol = 0.0;

      ierr = DMPlexGetSupport(udm, v+vStart, &support);CHKERRQ(ierr);
      ierr = DMPlexGetSupportSize(udm, v+vStart, &supportSize);CHKERRQ(ierr);
      for (s = 0; s < supportSize; ++s) {ierr = DMPlexComputeCellGeometryFVM(dm, support[s], &vol, NULL, NULL);CHKERRQ(ierr); totVol += vol;}
      for (s = 0; s < PetscSqr(dim); ++s) metric[v*PetscSqr(dim)+s] /= totVol;
    }
    ierr = VecDestroy(&mx);CHKERRQ(ierr);
    ierr = VecDestroy(&mb);CHKERRQ(ierr);
    ierr = MatDestroy(&A);CHKERRQ(ierr);
    ierr = DMDestroy(&udm);CHKERRQ(ierr);
    ierr = PetscFree(eqns);CHKERRQ(ierr);
    pragmatic_set_metric(metric);
    pragmatic_adapt();
    /* Read out mesh */
    pragmatic_get_info(&numCoarseVertices, &numCoarseCells);
    ierr = PetscMalloc1(numCoarseVertices*dim, &coarseCoords);CHKERRQ(ierr);
    switch (dim) {
    case 2:
      pragmatic_get_coords_2d(x, y);
      numCorners = 3;
      for (v = 0; v < numCoarseVertices; ++v) {coarseCoords[v*2+0] = x[v]; coarseCoords[v*2+1] = y[v];}
      break;
    case 3:
      pragmatic_get_coords_3d(x, y, z);
      numCorners = 4;
      for (v = 0; v < numCoarseVertices; ++v) {coarseCoords[v*3+0] = x[v]; coarseCoords[v*3+1] = y[v]; coarseCoords[v*3+2] = z[v];}
      break;
    default:
      SETERRQ1(PetscObjectComm((PetscObject) dm), PETSC_ERR_ARG_OUTOFRANGE, "No Pragmatic coarsening defined for dimension %d", dim);
    }
    pragmatic_get_elements(cells);
    /* TODO Read out markers for boundary */
    ierr = DMPlexCreateFromCellList(PetscObjectComm((PetscObject) dm), dim, numCoarseCells, numCoarseVertices, numCorners, PETSC_TRUE, cells, dim, coarseCoords, &mesh->coarseMesh);CHKERRQ(ierr);
    pragmatic_finalize();
    ierr = PetscFree5(x, y, z, metric, cells);CHKERRQ(ierr);
    ierr = PetscFree2(bdFaces, bdFaceIds);CHKERRQ(ierr);
    ierr = PetscFree(coarseCoords);CHKERRQ(ierr);
  }
#endif
  ierr = PetscObjectReference((PetscObject) mesh->coarseMesh);CHKERRQ(ierr);
  *dmCoarsened = mesh->coarseMesh;
  PetscFunctionReturn(0);
}

开发者ID:pombredanne，项目名称:petsc，代码行数:101，代码来源:plexcoarsen.c

示例7: main


//.........这里部分代码省略.........
        }
        ierr = VecDestroy(&b);CHKERRQ(ierr);
      }
      ierr = VecDestroy(&b1);CHKERRQ(ierr);
      ierr = VecDestroy(&b2);CHKERRQ(ierr);
      ierr = VecDestroy(&x);CHKERRQ(ierr);
      ierr = MatConvert(S,MATDENSE,MAT_INITIAL_MATRIX,&B);CHKERRQ(ierr);

      ierr = MatCreateTranspose(S,&ST);CHKERRQ(ierr);
      ierr = MatComputeOperator(ST,MATDENSE,&BT);CHKERRQ(ierr);
      ierr = MatTranspose(BT,MAT_INITIAL_MATRIX,&BTT);CHKERRQ(ierr);
      ierr = PetscObjectSetName((PetscObject)B,"S");CHKERRQ(ierr);
      ierr = PetscObjectSetName((PetscObject)BTT,"STT");CHKERRQ(ierr);
      ierr = MatConvert(A,MATDENSE,MAT_INITIAL_MATRIX,&C);CHKERRQ(ierr);
      ierr = PetscObjectSetName((PetscObject)C,"A");CHKERRQ(ierr);

      ierr = MatViewFromOptions(C,NULL,"-view_mat");CHKERRQ(ierr);
      ierr = MatViewFromOptions(B,NULL,"-view_mat");CHKERRQ(ierr);
      ierr = MatViewFromOptions(BTT,NULL,"-view_mat");CHKERRQ(ierr);

      ierr = MatAXPY(C,-1.0,B,SAME_NONZERO_PATTERN);CHKERRQ(ierr);
      ierr = MatNorm(C,NORM_FROBENIUS,&err);CHKERRQ(ierr);
      if (err >= tol) {
        ierr = PetscPrintf(PETSC_COMM_WORLD,"[test %D] Error mat mult %g\n",test,(double)err);CHKERRQ(ierr);
      }

      ierr = MatConvert(A,MATDENSE,MAT_REUSE_MATRIX,&C);CHKERRQ(ierr);
      ierr = MatAXPY(C,-1.0,BTT,SAME_NONZERO_PATTERN);CHKERRQ(ierr);
      ierr = MatNorm(C,NORM_FROBENIUS,&err);CHKERRQ(ierr);
      if (err >= tol) {
        ierr = PetscPrintf(PETSC_COMM_WORLD,"[test %D] Error mat mult transpose %g\n",test,(double)err);CHKERRQ(ierr);
      }

      ierr = MatDestroy(&ST);CHKERRQ(ierr);
      ierr = MatDestroy(&BTT);CHKERRQ(ierr);
      ierr = MatDestroy(&BT);CHKERRQ(ierr);
      ierr = MatDestroy(&B);CHKERRQ(ierr);
      ierr = MatDestroy(&C);CHKERRQ(ierr);
    }
    if (testdiagscale) { /* MatDiagonalScale() */
      Vec vr,vl;

      ierr = MatCreateVecs(A,&vr,&vl);CHKERRQ(ierr);
      if (randomize) {
        ierr = VecSetRandom(vr,NULL);CHKERRQ(ierr);
        ierr = VecSetRandom(vl,NULL);CHKERRQ(ierr);
      } else {
        ierr = VecSet(vr,test%2 ? 0.15 : 1.0/0.15);CHKERRQ(ierr);
        ierr = VecSet(vl,test%2 ? -1.2 : 1.0/-1.2);CHKERRQ(ierr);
      }
      ierr = MatDiagonalScale(A,vl,vr);CHKERRQ(ierr);
      ierr = MatDiagonalScale(S,vl,vr);CHKERRQ(ierr);
      ierr = VecDestroy(&vr);CHKERRQ(ierr);
      ierr = VecDestroy(&vl);CHKERRQ(ierr);
    }

    if (testscale) { /* MatScale() */
      ierr = MatScale(A,test%2 ? 1.4 : 1.0/1.4);CHKERRQ(ierr);
      ierr = MatScale(S,test%2 ? 1.4 : 1.0/1.4);CHKERRQ(ierr);
    }

    if (testshift && cong) { /* MatShift() : MATSHELL shift is broken when row/cols layout are not congruent and left/right scaling have been applied */
      ierr = MatShift(A,test%2 ? -77.5 : 77.5);CHKERRQ(ierr);
      ierr = MatShift(S,test%2 ? -77.5 : 77.5);CHKERRQ(ierr);
    }

开发者ID:petsc，项目名称:petsc，代码行数:66，代码来源:ex221.c

示例8: main

int main(int argc,char **args)
{
  MatType         mtype = MATMPIAIJ; /* matrix format */
  Mat             A,B;               /* matrix */
  PetscViewer     fd;                /* viewer */
  char            file[PETSC_MAX_PATH_LEN];         /* input file name */
  PetscBool       flg,viewMats,viewIS,viewVecs;
  PetscInt        ierr,*nlocal,m,n;
  PetscMPIInt     rank,size;
  MatPartitioning part;
  IS              is,isn;
  Vec             xin, xout;
  VecScatter      scat;

  PetscInitialize(&argc,&args,(char*)0,help);
  ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr);
  ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr);
  ierr = PetscOptionsHasName(NULL, "-view_mats", &viewMats);CHKERRQ(ierr);
  ierr = PetscOptionsHasName(NULL, "-view_is", &viewIS);CHKERRQ(ierr);
  ierr = PetscOptionsHasName(NULL, "-view_vecs", &viewVecs);CHKERRQ(ierr);

  /*
     Determine file from which we read the matrix
  */
  ierr = PetscOptionsGetString(NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr);

  /*
       Open binary file.  Note that we use FILE_MODE_READ to indicate
       reading from this file.
  */
  ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);CHKERRQ(ierr);

  /*
      Load the matrix and vector; then destroy the viewer.
  */
  ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
  ierr = MatSetType(A,mtype);CHKERRQ(ierr);
  ierr = MatLoad(A,fd);CHKERRQ(ierr);
  ierr = VecCreate(PETSC_COMM_WORLD,&xin);CHKERRQ(ierr);
  ierr = VecLoad(xin,fd);CHKERRQ(ierr);
  ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr);
  if (viewMats) {
    if (!rank) printf("Original matrix:\n");
    ierr = MatView(A,PETSC_VIEWER_DRAW_WORLD);CHKERRQ(ierr);
  }
  if (viewVecs) {
    if (!rank) printf("Original vector:\n");
    ierr = VecView(xin,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
  }

  /* Partition the graph of the matrix */
  ierr = MatPartitioningCreate(PETSC_COMM_WORLD,&part);CHKERRQ(ierr);
  ierr = MatPartitioningSetAdjacency(part,A);CHKERRQ(ierr);
  ierr = MatPartitioningSetFromOptions(part);CHKERRQ(ierr);

  /* get new processor owner number of each vertex */
  ierr = MatPartitioningApply(part,&is);CHKERRQ(ierr);
  if (viewIS) {
    if (!rank) printf("IS1 - new processor ownership:\n");
    ierr = ISView(is,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
  }

  /* get new global number of each old global number */
  ierr = ISPartitioningToNumbering(is,&isn);CHKERRQ(ierr);
  if (viewIS) {
    if (!rank) printf("IS2 - new global numbering:\n");
    ierr = ISView(isn,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
  }

  /* get number of new vertices for each processor */
  ierr = PetscMalloc(size*sizeof(PetscInt),&nlocal);CHKERRQ(ierr);
  ierr = ISPartitioningCount(is,size,nlocal);CHKERRQ(ierr);
  ierr = ISDestroy(&is);CHKERRQ(ierr);

  /* get old global number of each new global number */
  ierr = ISInvertPermutation(isn,nlocal[rank],&is);CHKERRQ(ierr);
  ierr = PetscFree(nlocal);CHKERRQ(ierr);
  ierr = ISDestroy(&isn);CHKERRQ(ierr);
  ierr = MatPartitioningDestroy(&part);CHKERRQ(ierr);
  if (viewIS) {
    if (!rank) printf("IS3=inv(IS2) - old global number of each new global number:\n");
    ierr = ISView(is,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
  }

  /* move the matrix rows to the new processes they have been assigned to by the permutation */
  ierr = ISSort(is);CHKERRQ(ierr);
  ierr = MatGetSubMatrix(A,is,is,MAT_INITIAL_MATRIX,&B);CHKERRQ(ierr);
  ierr = MatDestroy(&A);CHKERRQ(ierr);

  /* move the vector rows to the new processes they have been assigned to */
  ierr = MatGetLocalSize(B,&m,&n);CHKERRQ(ierr);
  ierr = VecCreateMPI(PETSC_COMM_WORLD,m,PETSC_DECIDE,&xout);CHKERRQ(ierr);
  ierr = VecScatterCreate(xin,is,xout,NULL,&scat);CHKERRQ(ierr);
  ierr = VecScatterBegin(scat,xin,xout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
  ierr = VecScatterEnd(scat,xin,xout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr);
  ierr = VecScatterDestroy(&scat);CHKERRQ(ierr);
  ierr = ISDestroy(&is);CHKERRQ(ierr);
  if (viewMats) {
    if (!rank) printf("Partitioned matrix:\n");
    ierr = MatView(B,PETSC_VIEWER_DRAW_WORLD);CHKERRQ(ierr);
//.........这里部分代码省略.........

开发者ID:feelpp，项目名称:debian-petsc，代码行数:101，代码来源:ex73.c

示例9: PCSetUp_MG

PetscErrorCode PCSetUp_MG(PC pc)
{
  PC_MG          *mg        = (PC_MG*)pc->data;
  PC_MG_Levels   **mglevels = mg->levels;
  PetscErrorCode ierr;
  PetscInt       i,n = mglevels[0]->levels;
  PC             cpc;
  PetscBool      preonly,lu,redundant,cholesky,svd,dump = PETSC_FALSE,opsset,use_amat;
  Mat            dA,dB;
  Vec            tvec;
  DM             *dms;
  PetscViewer    viewer = 0;

  PetscFunctionBegin;
  /* FIX: Move this to PCSetFromOptions_MG? */
  if (mg->usedmfornumberoflevels) {
    PetscInt levels;
    ierr = DMGetRefineLevel(pc->dm,&levels);CHKERRQ(ierr);
    levels++;
    if (levels > n) { /* the problem is now being solved on a finer grid */
      ierr     = PCMGSetLevels(pc,levels,NULL);CHKERRQ(ierr);
      n        = levels;
      ierr     = PCSetFromOptions(pc);CHKERRQ(ierr); /* it is bad to call this here, but otherwise will never be called for the new hierarchy */
      mglevels =  mg->levels;
    }
  }
  ierr = KSPGetPC(mglevels[0]->smoothd,&cpc);CHKERRQ(ierr);


  /* If user did not provide fine grid operators OR operator was not updated since last global KSPSetOperators() */
  /* so use those from global PC */
  /* Is this what we always want? What if user wants to keep old one? */
  ierr = KSPGetOperatorsSet(mglevels[n-1]->smoothd,NULL,&opsset);CHKERRQ(ierr);
  if (opsset) {
    Mat mmat;
    ierr = KSPGetOperators(mglevels[n-1]->smoothd,NULL,&mmat);CHKERRQ(ierr);
    if (mmat == pc->pmat) opsset = PETSC_FALSE;
  }

  if (!opsset) {
    ierr = PCGetUseAmat(pc,&use_amat);CHKERRQ(ierr);
    if(use_amat){
      ierr = PetscInfo(pc,"Using outer operators to define finest grid operator \n  because PCMGGetSmoother(pc,nlevels-1,&ksp);KSPSetOperators(ksp,...); was not called.\n");CHKERRQ(ierr);
      ierr = KSPSetOperators(mglevels[n-1]->smoothd,pc->mat,pc->pmat);CHKERRQ(ierr);
    }
    else {
      ierr = PetscInfo(pc,"Using matrix (pmat) operators to define finest grid operator \n  because PCMGGetSmoother(pc,nlevels-1,&ksp);KSPSetOperators(ksp,...); was not called.\n");CHKERRQ(ierr);
      ierr = KSPSetOperators(mglevels[n-1]->smoothd,pc->pmat,pc->pmat);CHKERRQ(ierr);
    }
  }

  /* Skipping this for galerkin==2 (externally managed hierarchy such as ML and GAMG). Cleaner logic here would be great. Wrap ML/GAMG as DMs? */
  if (pc->dm && mg->galerkin != 2 && !pc->setupcalled) {
    /* construct the interpolation from the DMs */
    Mat p;
    Vec rscale;
    ierr     = PetscMalloc1(n,&dms);CHKERRQ(ierr);
    dms[n-1] = pc->dm;
    for (i=n-2; i>-1; i--) {
      DMKSP kdm;
      ierr = DMCoarsen(dms[i+1],MPI_COMM_NULL,&dms[i]);CHKERRQ(ierr);
      ierr = KSPSetDM(mglevels[i]->smoothd,dms[i]);CHKERRQ(ierr);
      if (mg->galerkin) {ierr = KSPSetDMActive(mglevels[i]->smoothd,PETSC_FALSE);CHKERRQ(ierr);}
      ierr = DMGetDMKSPWrite(dms[i],&kdm);CHKERRQ(ierr);
      /* Ugly hack so that the next KSPSetUp() will use the RHS that we set. A better fix is to change dmActive to take
       * a bitwise OR of computing the matrix, RHS, and initial iterate. */
      kdm->ops->computerhs = NULL;
      kdm->rhsctx          = NULL;
      if (!mglevels[i+1]->interpolate) {
        ierr = DMCreateInterpolation(dms[i],dms[i+1],&p,&rscale);CHKERRQ(ierr);
        ierr = PCMGSetInterpolation(pc,i+1,p);CHKERRQ(ierr);
        if (rscale) {ierr = PCMGSetRScale(pc,i+1,rscale);CHKERRQ(ierr);}
        ierr = VecDestroy(&rscale);CHKERRQ(ierr);
        ierr = MatDestroy(&p);CHKERRQ(ierr);
      }
    }

    for (i=n-2; i>-1; i--) {
      ierr = DMDestroy(&dms[i]);CHKERRQ(ierr);
    }
    ierr = PetscFree(dms);CHKERRQ(ierr);
  }

  if (pc->dm && !pc->setupcalled) {
    /* finest smoother also gets DM but it is not active, independent of whether galerkin==2 */
    ierr = KSPSetDM(mglevels[n-1]->smoothd,pc->dm);CHKERRQ(ierr);
    ierr = KSPSetDMActive(mglevels[n-1]->smoothd,PETSC_FALSE);CHKERRQ(ierr);
  }

  if (mg->galerkin == 1) {
    Mat B;
    /* currently only handle case where mat and pmat are the same on coarser levels */
    ierr = KSPGetOperators(mglevels[n-1]->smoothd,&dA,&dB);CHKERRQ(ierr);
    if (!pc->setupcalled) {
      for (i=n-2; i>-1; i--) {
        if (mglevels[i+1]->interpolate == mglevels[i+1]->restrct || !mglevels[i+1]->restrct) {
          ierr = MatPtAP(dB,mglevels[i+1]->interpolate,MAT_INITIAL_MATRIX,1.0,&B);CHKERRQ(ierr);
        } else {
          ierr = MatMatMatMult(mglevels[i+1]->restrct,dB,mglevels[i+1]->interpolate,MAT_INITIAL_MATRIX,1.0,&B);CHKERRQ(ierr);
        }
//.........这里部分代码省略.........

开发者ID:PeiLiu90，项目名称:petsc，代码行数:101，代码来源:mg.c

示例10: main

int main(int argc,char **argv)
{
  PetscErrorCode ierr;
  KSP            ksp;
  PC             pc;
  Vec            x,b;
  DM             da;
  Mat            A;
  PetscInt       dof=1;
  PetscBool      flg;
  PetscScalar    zero=0.0;

  PetscInitialize(&argc,&argv,(char*)0,help);
  ierr = PetscOptionsGetInt(NULL,"-dof",&dof,NULL);CHKERRQ(ierr);

  ierr = DMDACreate(PETSC_COMM_WORLD,&da);CHKERRQ(ierr);
  ierr = DMDASetDim(da,3);CHKERRQ(ierr);
  ierr = DMDASetBoundaryType(da,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE);CHKERRQ(ierr);
  ierr = DMDASetStencilType(da,DMDA_STENCIL_STAR);CHKERRQ(ierr);
  ierr = DMDASetSizes(da,3,3,3);CHKERRQ(ierr);
  ierr = DMDASetNumProcs(da,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE);CHKERRQ(ierr);
  ierr = DMDASetDof(da,dof);CHKERRQ(ierr);
  ierr = DMDASetStencilWidth(da,1);CHKERRQ(ierr);
  ierr = DMDASetOwnershipRanges(da,NULL,NULL,NULL);CHKERRQ(ierr);
  ierr = DMSetFromOptions(da);CHKERRQ(ierr);
  ierr = DMSetUp(da);CHKERRQ(ierr);

  ierr = DMCreateGlobalVector(da,&x);CHKERRQ(ierr);
  ierr = DMCreateGlobalVector(da,&b);CHKERRQ(ierr);
  ierr = DMCreateMatrix(da,MATAIJ,&A);CHKERRQ(ierr);
  ierr = VecSet(b,zero);CHKERRQ(ierr);

  /* Test sbaij matrix */
  flg  = PETSC_FALSE;
  ierr = PetscOptionsGetBool(NULL,"-test_sbaij",&flg,NULL);CHKERRQ(ierr);
  if (flg) {
    Mat sA;
    ierr = MatSetOption(A,MAT_SYMMETRIC,PETSC_TRUE);CHKERRQ(ierr);
    ierr = MatConvert(A,MATSBAIJ,MAT_INITIAL_MATRIX,&sA);CHKERRQ(ierr);
    ierr = MatDestroy(&A);CHKERRQ(ierr);
    A    = sA;
  }

  ierr = KSPCreate(PETSC_COMM_WORLD,&ksp);CHKERRQ(ierr);
  ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
  ierr = KSPSetOperators(ksp,A,A,SAME_NONZERO_PATTERN);CHKERRQ(ierr);
  ierr = KSPGetPC(ksp,&pc);CHKERRQ(ierr);
  ierr = PCSetDM(pc,(DM)da);CHKERRQ(ierr);

  ierr = KSPSolve(ksp,b,x);CHKERRQ(ierr);

  /* check final residual */
  flg  = PETSC_FALSE;
  ierr = PetscOptionsGetBool(NULL, "-check_final_residual", &flg,NULL);CHKERRQ(ierr);
  if (flg) {
    Vec       b1;
    PetscReal norm;
    ierr = KSPGetSolution(ksp,&x);CHKERRQ(ierr);
    ierr = VecDuplicate(b,&b1);CHKERRQ(ierr);
    ierr = MatMult(A,x,b1);CHKERRQ(ierr);
    ierr = VecAXPY(b1,-1.0,b);CHKERRQ(ierr);
    ierr = VecNorm(b1,NORM_2,&norm);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Final residual %g\n",norm);CHKERRQ(ierr);
    ierr = VecDestroy(&b1);CHKERRQ(ierr);
  }

  ierr = KSPDestroy(&ksp);CHKERRQ(ierr);
  ierr = VecDestroy(&x);CHKERRQ(ierr);
  ierr = VecDestroy(&b);CHKERRQ(ierr);
  ierr = MatDestroy(&A);CHKERRQ(ierr);
  ierr = DMDestroy(&da);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return 0;
}

开发者ID:feelpp，项目名称:debian-petsc，代码行数:74，代码来源:ex35.c

示例11: main

int main(int argc,char **args)
{
  Vec            x,b,u;      /* approx solution, RHS, exact solution */
  Mat            A;            /* linear system matrix */
  KSP            ksp;         /* KSP context */
  PetscErrorCode ierr;
  PetscInt       i,n = 10,col[3],its,i1,i2;
  PetscScalar    none = -1.0,value[3],avalue;
  PetscReal      norm;
  PC             pc;

  ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
  ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr);

  /* Create vectors */
  ierr = VecCreate(PETSC_COMM_WORLD,&x);CHKERRQ(ierr);
  ierr = VecSetSizes(x,PETSC_DECIDE,n);CHKERRQ(ierr);
  ierr = VecSetFromOptions(x);CHKERRQ(ierr);
  ierr = VecDuplicate(x,&b);CHKERRQ(ierr);
  ierr = VecDuplicate(x,&u);CHKERRQ(ierr);

  /* create a solution that is orthogonal to the constants */
  ierr = VecGetOwnershipRange(u,&i1,&i2);CHKERRQ(ierr);
  for (i=i1; i<i2; i++) {
    avalue = i;
    VecSetValues(u,1,&i,&avalue,INSERT_VALUES);
  }
  ierr   = VecAssemblyBegin(u);CHKERRQ(ierr);
  ierr   = VecAssemblyEnd(u);CHKERRQ(ierr);
  ierr   = VecSum(u,&avalue);CHKERRQ(ierr);
  avalue = -avalue/(PetscReal)n;
  ierr   = VecShift(u,avalue);CHKERRQ(ierr);

  /* Create and assemble matrix */
  ierr     = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
  ierr     = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n);CHKERRQ(ierr);
  ierr     = MatSetFromOptions(A);CHKERRQ(ierr);
  value[0] = -1.0; value[1] = 2.0; value[2] = -1.0;
  for (i=1; i<n-1; i++) {
    col[0] = i-1; col[1] = i; col[2] = i+1;
    ierr   = MatSetValues(A,1,&i,3,col,value,INSERT_VALUES);CHKERRQ(ierr);
  }
  i    = n - 1; col[0] = n - 2; col[1] = n - 1; value[1] = 1.0;
  ierr = MatSetValues(A,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr);
  i    = 0; col[0] = 0; col[1] = 1; value[0] = 1.0; value[1] = -1.0;
  ierr = MatSetValues(A,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatMult(A,u,b);CHKERRQ(ierr);

  /* Create KSP context; set operators and options; solve linear system */
  ierr = KSPCreate(PETSC_COMM_WORLD,&ksp);CHKERRQ(ierr);
  ierr = KSPSetOperators(ksp,A,A);CHKERRQ(ierr);

  /* Insure that preconditioner has same null space as matrix */
  /* currently does not do anything */
  ierr = KSPGetPC(ksp,&pc);CHKERRQ(ierr);

  ierr = KSPSetFromOptions(ksp);CHKERRQ(ierr);
  ierr = KSPSolve(ksp,b,x);CHKERRQ(ierr);
  /* ierr = KSPView(ksp,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); */

  /* Check error */
  ierr = VecAXPY(x,none,u);CHKERRQ(ierr);
  ierr = VecNorm(x,NORM_2,&norm);CHKERRQ(ierr);
  ierr = KSPGetIterationNumber(ksp,&its);CHKERRQ(ierr);
  ierr = PetscPrintf(PETSC_COMM_WORLD,"Norm of error %g, Iterations %D\n",(double)norm,its);CHKERRQ(ierr);

  /* Free work space */
  ierr = VecDestroy(&x);CHKERRQ(ierr);ierr = VecDestroy(&u);CHKERRQ(ierr);
  ierr = VecDestroy(&b);CHKERRQ(ierr);ierr = MatDestroy(&A);CHKERRQ(ierr);
  ierr = KSPDestroy(&ksp);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return ierr;
}

开发者ID:firedrakeproject，项目名称:petsc，代码行数:75，代码来源:ex15.c

示例12: main

int main(int argc,char **args)
{
  Mat              *A,B;           /* matrix */
  PetscErrorCode   ierr;
  Vec              x,y,v,v2,z;
  PetscReal        rnorm;
  PetscInt         n = 20;         /* size of the matrix */
  PetscInt         nmat = 3;       /* number of matrices */
  PetscInt         i;
  PetscRandom      rctx;
  MatCompositeType type;

  ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
  ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr);
  ierr = PetscOptionsGetInt(NULL,NULL,"-nmat",&nmat,NULL);CHKERRQ(ierr);

  /*
     Create random matrices
  */
  ierr = PetscMalloc1(nmat+3,&A);CHKERRQ(ierr);
  ierr = PetscRandomCreate(PETSC_COMM_WORLD,&rctx);CHKERRQ(ierr);
  ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n/2,3,NULL,3,NULL,&A[0]);CHKERRQ(ierr);
  for (i = 1; i < nmat+1; i++) {
    ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n,3,NULL,3,NULL,&A[i]);CHKERRQ(ierr);
  }
  ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n/2,n,3,NULL,3,NULL,&A[nmat+1]);CHKERRQ(ierr);
  for (i = 0; i < nmat+2; i++) {
    ierr = MatSetRandom(A[i],rctx);CHKERRQ(ierr);
  }

  ierr = MatCreateVecs(A[1],&x,&y);CHKERRQ(ierr);
  ierr = VecDuplicate(y,&z);CHKERRQ(ierr);
  ierr = MatCreateVecs(A[0],&v,NULL);CHKERRQ(ierr);
  ierr = VecDuplicate(v,&v2);CHKERRQ(ierr);

  ierr = VecSet(x,1.0);CHKERRQ(ierr);
  ierr = VecSet(y,0.0);CHKERRQ(ierr);
  ierr = MatMult(A[1],x,z);CHKERRQ(ierr);
  for (i = 2; i < nmat+1; i++) {
    ierr = MatMultAdd(A[i],x,z,z);CHKERRQ(ierr);
  }

  ierr = MatCreateComposite(PETSC_COMM_WORLD,nmat,A+1,&B);CHKERRQ(ierr);
  ierr = MatMultAdd(B,x,y,y);CHKERRQ(ierr);
  ierr = VecAXPY(y,-1.0,z);CHKERRQ(ierr);
  ierr = VecNorm(y,NORM_2,&rnorm);CHKERRQ(ierr);
  if (rnorm > 10000.0*PETSC_MACHINE_EPSILON) {
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Error with composite add %g\n",(double)rnorm);CHKERRQ(ierr);
  }

  ierr = MatCompositeSetMatStructure(B,DIFFERENT_NONZERO_PATTERN);CHKERRQ(ierr); /* default */
  ierr = MatCompositeMerge(B);CHKERRQ(ierr);
  ierr = MatMult(B,x,y);CHKERRQ(ierr);
  ierr = MatDestroy(&B);CHKERRQ(ierr);
  ierr = VecAXPY(y,-1.0,z);CHKERRQ(ierr);
  ierr = VecNorm(y,NORM_2,&rnorm);CHKERRQ(ierr);
  if (rnorm > 10000.0*PETSC_MACHINE_EPSILON) {
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Error with composite add after merge %g\n",(double)rnorm);CHKERRQ(ierr);
  }

  /*
     Test n x n/2 multiplicative composite
  */
  ierr = VecSet(v,1.0);CHKERRQ(ierr);
  ierr = MatMult(A[0],v,z);CHKERRQ(ierr);
  for (i = 1; i < nmat; i++) {
    ierr = MatMult(A[i],z,y);CHKERRQ(ierr);
    ierr = VecCopy(y,z);CHKERRQ(ierr);
  }

  ierr = MatCreateComposite(PETSC_COMM_WORLD,nmat,A,&B);CHKERRQ(ierr);
  ierr = MatCompositeSetType(B,MAT_COMPOSITE_MULTIPLICATIVE);CHKERRQ(ierr);
  ierr = MatCompositeSetMergeType(B,MAT_COMPOSITE_MERGE_LEFT);CHKERRQ(ierr);
  ierr = MatSetFromOptions(B);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); /* do MatCompositeMerge() if -mat_composite_merge 1 */
  ierr = MatMult(B,v,y);CHKERRQ(ierr);
  ierr = MatDestroy(&B);CHKERRQ(ierr);
  ierr = VecAXPY(y,-1.0,z);CHKERRQ(ierr);
  ierr = VecNorm(y,NORM_2,&rnorm);CHKERRQ(ierr);
  if (rnorm > 10000.0*PETSC_MACHINE_EPSILON) {
    ierr = PetscPrintf(PETSC_COMM_WORLD,"Error with composite multiplicative %g\n",(double)rnorm);CHKERRQ(ierr);
  }

  /*
     Test n/2 x n multiplicative composite
  */
  ierr = VecSet(x,1.0);CHKERRQ(ierr);
  ierr = MatMult(A[2],x,z);CHKERRQ(ierr);
  for (i = 3; i < nmat+1; i++) {
    ierr = MatMult(A[i],z,y);CHKERRQ(ierr);
    ierr = VecCopy(y,z);CHKERRQ(ierr);
  }
  ierr = MatMult(A[nmat+1],z,v);CHKERRQ(ierr);

  ierr = MatCreateComposite(PETSC_COMM_WORLD,nmat,A+2,&B);CHKERRQ(ierr);
  ierr = MatCompositeSetType(B,MAT_COMPOSITE_MULTIPLICATIVE);CHKERRQ(ierr);
  ierr = MatSetFromOptions(B);CHKERRQ(ierr);
  ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
  ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); /* do MatCompositeMerge() if -mat_composite_merge 1 */
//.........这里部分代码省略.........

开发者ID:petsc，项目名称:petsc，代码行数:101，代码来源:ex9.c