Actual source code: ex10.c

petsc-master 2019-06-26
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  2: static char help[] = "Reads a PETSc matrix and computes the 2 norm of the columns\n\n";

  4: /*T
  5:    Concepts: Mat^loading a binary matrix;
  6:    Processors: n
  7: T*/

  9: /*
 10:   Include "petscmat.h" so that we can use matrices.
 11:   automatically includes:
 12:      petscsys.h       - base PETSc routines   petscvec.h    - vectors
 13:      petscmat.h    - matrices
 14:      petscis.h     - index sets            petscviewer.h - viewers
 15: */
 16:  #include <petscmat.h>


 19: int main(int argc,char **args)
 20: {
 21:   Mat            A;                       /* matrix */
 22:   PetscViewer    fd;                      /* viewer */
 23:   char           file[PETSC_MAX_PATH_LEN];            /* input file name */
 25:   PetscReal      *norms;
 26:   PetscInt       n,cstart,cend;
 27:   PetscBool      flg;
 28:   PetscViewerFormat format;

 30:   PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr;
 31:   /*
 32:      Determine files from which we read the matrix
 33:   */
 34:   PetscOptionsGetString(NULL,NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);
 35:   if (!flg) SETERRQ(PETSC_COMM_WORLD,1,"Must indicate binary file with the -f option");

 37:   /*
 38:      Open binary file.  Note that we use FILE_MODE_READ to indicate
 39:      reading from this file.
 40:   */
 41:   PetscViewerCreate(PETSC_COMM_WORLD,&fd);
 42:   PetscViewerSetType(fd,PETSCVIEWERBINARY);
 43:   PetscViewerSetFromOptions(fd);
 44:   PetscOptionsGetEnum(NULL,NULL,"-viewer_format",PetscViewerFormats,(PetscEnum*)&format,&flg);
 45:   if (flg) {PetscViewerPushFormat(fd,format);}
 46:   PetscViewerFileSetMode(fd,FILE_MODE_READ);
 47:   PetscViewerFileSetName(fd,file);

 49:   /*
 50:     Load the matrix; then destroy the viewer.
 51:     Matrix type is set automatically but you can override it by MatSetType() prior to MatLoad().
 52:     Do that only if you really insist on the given type.
 53:   */
 54:   MatCreate(PETSC_COMM_WORLD,&A);
 55:   MatSetOptionsPrefix(A,"a_");
 56:   PetscObjectSetName((PetscObject) A,"A");
 57:   MatSetFromOptions(A);
 58:   MatLoad(A,fd);
 59:   PetscViewerDestroy(&fd);

 61:   MatGetSize(A,NULL,&n);
 62:   MatGetOwnershipRangeColumn(A,&cstart,&cend);
 63:   PetscMalloc1(n,&norms);
 64:   MatGetColumnNorms(A,NORM_2,norms);
 65:   PetscRealView(cend-cstart,norms+cstart,PETSC_VIEWER_STDOUT_WORLD);
 66:   PetscFree(norms);

 68:   PetscObjectPrintClassNamePrefixType((PetscObject)A,PETSC_VIEWER_STDOUT_WORLD);
 69:   MatGetOption(A,MAT_SYMMETRIC,&flg);
 70:   PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD,"MAT_SYMMETRIC: %D\n",flg);
 71:   MatViewFromOptions(A,NULL,"-mat_view");

 73:   MatDestroy(&A);
 74:   PetscFinalize();
 75:   return ierr;
 76: }



 80: /*TEST

 82:    test:
 83:       suffix: mpiaij
 84:       nsize: 2
 85:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
 86:       args: -f ${DATAFILESPATH}/matrices/small -a_mat_type mpiaij
 87:       args: -a_matload_symmetric

 89:    test:
 90:       suffix: mpiaij_hdf5
 91:       nsize: 2
 92:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
 93:       args: -f ${DATAFILESPATH}/matrices/matlab/small.mat -a_mat_type mpiaij -viewer_type hdf5 -viewer_format hdf5_mat
 94:       args: -a_matload_symmetric

 96:    test:
 97:       suffix: mpiaij_rect_hdf5
 98:       nsize: 2
 99:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
100:       args: -f ${DATAFILESPATH}/matrices/matlab/small_rect.mat -a_mat_type mpiaij -viewer_type hdf5 -viewer_format hdf5_mat

102:    test:
103:       # test for more processes than rows
104:       suffix: mpiaij_hdf5_tiny
105:       nsize: 8
106:       requires: double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
107:       args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/tiny_system_with_x0.mat -a_mat_type mpiaij -viewer_type hdf5 -viewer_format hdf5_mat
108:       args: -a_matload_symmetric

110:    test:
111:       # test for more processes than rows, complex
112:       TODO: not yet implemented for MATLAB complex format
113:       suffix: mpiaij_hdf5_tiny_complex
114:       nsize: 8
115:       requires: double complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
116:       args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/tiny_system_with_x0_complex.mat -a_mat_type mpiaij -viewer_type hdf5 -viewer_format hdf5_mat
117:       args: -a_matload_symmetric

119:    test:
120:       TODO: mpibaij not supported yet
121:       suffix: mpibaij_hdf5
122:       nsize: 2
123:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
124:       args: -f ${DATAFILESPATH}/matrices/matlab/small.mat -a_mat_type mpibaij -a_mat_block_size 2 -viewer_type hdf5 -viewer_format hdf5_mat
125:       args: -a_matload_symmetric

127:    test:
128:       suffix: mpidense
129:       nsize: 2
130:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
131:       args: -f ${DATAFILESPATH}/matrices/small -a_mat_type mpidense
132:       args: -a_matload_symmetric

134:    test:
135:       suffix: seqaij
136:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
137:       args: -f ${DATAFILESPATH}/matrices/small -a_mat_type seqaij
138:       args: -a_matload_symmetric

140:    test:
141:       suffix: seqaij_hdf5
142:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
143:       args: -f ${DATAFILESPATH}/matrices/matlab/small.mat -a_mat_type seqaij -viewer_type hdf5 -viewer_format hdf5_mat
144:       args: -a_matload_symmetric

146:    test:
147:       suffix: seqaij_rect_hdf5
148:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
149:       args: -f ${DATAFILESPATH}/matrices/matlab/small_rect.mat -a_mat_type seqaij -viewer_type hdf5 -viewer_format hdf5_mat

151:    test:
152:       suffix: seqdense
153:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
154:       args: -f ${DATAFILESPATH}/matrices/small -a_mat_type seqdense
155:       args: -a_matload_symmetric

157:    test:
158:       suffix: seqdense_hdf5
159:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
160:       args: -f ${DATAFILESPATH}/matrices/matlab/small_dense.mat -a_mat_type seqdense -viewer_type hdf5 -viewer_format hdf5_mat
161:       args: -a_matload_symmetric

163:    test:
164:       suffix: seqdense_rect_hdf5
165:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
166:       args: -f ${DATAFILESPATH}/matrices/matlab/small_rect_dense.mat -a_mat_type seqdense -viewer_type hdf5 -viewer_format hdf5_mat

168:    test:
169:       suffix: mpidense_hdf5
170:       nsize: 2
171:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
172:       args: -f ${DATAFILESPATH}/matrices/matlab/small_dense.mat -a_mat_type mpidense -viewer_type hdf5 -viewer_format hdf5_mat
173:       args: -a_matload_symmetric

175:    test:
176:       suffix: mpidense_rect_hdf5
177:       nsize: 2
178:       requires: datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) hdf5 zlib
179:       args: -f ${DATAFILESPATH}/matrices/matlab/small_rect_dense.mat -a_mat_type mpidense -viewer_type hdf5 -viewer_format hdf5_mat
180: TEST*/