Actual source code: ex10.c
2: static char help[] = "Tests I/O of vectors for different data formats (binary,HDF5) and illustrates the use of user-defined event logging\n\n";
4: #include <petscvec.h>
5: #include <petscviewerhdf5.h>
7: /* Note: Most applications would not read and write a vector within
8: the same program. This example is intended only to demonstrate
9: both input and output and is written for use with either 1,2,or 4 processors. */
11: int main(int argc, char **args)
12: {
13: PetscMPIInt rank, size;
14: PetscInt i, m = 20, low, high, ldim, iglobal, lsize;
15: PetscScalar v;
16: Vec u;
17: PetscViewer viewer;
18: PetscBool vstage2, vstage3, mpiio_use, isbinary = PETSC_FALSE;
19: #if defined(PETSC_HAVE_HDF5)
20: PetscBool ishdf5 = PETSC_FALSE;
21: #endif
22: #if defined(PETSC_HAVE_ADIOS)
23: PetscBool isadios = PETSC_FALSE;
24: #endif
25: PetscScalar const *values;
26: #if defined(PETSC_USE_LOG)
27: PetscLogEvent VECTOR_GENERATE, VECTOR_READ;
28: #endif
31: PetscInitialize(&argc, &args, (char *)0, help);
32: mpiio_use = vstage2 = vstage3 = PETSC_FALSE;
34: PetscOptionsGetBool(NULL, NULL, "-binary", &isbinary, NULL);
35: #if defined(PETSC_HAVE_HDF5)
36: PetscOptionsGetBool(NULL, NULL, "-hdf5", &ishdf5, NULL);
37: #endif
38: #if defined(PETSC_HAVE_ADIOS)
39: PetscOptionsGetBool(NULL, NULL, "-adios", &isadios, NULL);
40: #endif
41: PetscOptionsGetBool(NULL, NULL, "-mpiio", &mpiio_use, NULL);
42: PetscOptionsGetBool(NULL, NULL, "-sizes_set", &vstage2, NULL);
43: PetscOptionsGetBool(NULL, NULL, "-type_set", &vstage3, NULL);
45: MPI_Comm_rank(PETSC_COMM_WORLD, &rank);
46: MPI_Comm_size(PETSC_COMM_WORLD, &size);
47: PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL);
49: /* PART 1: Generate vector, then write it in the given data format */
51: PetscLogEventRegister("Generate Vector", VEC_CLASSID, &VECTOR_GENERATE);
52: PetscLogEventBegin(VECTOR_GENERATE, 0, 0, 0, 0);
53: /* Generate vector */
54: VecCreate(PETSC_COMM_WORLD, &u);
55: PetscObjectSetName((PetscObject)u, "Test_Vec");
56: VecSetSizes(u, PETSC_DECIDE, m);
57: VecSetFromOptions(u);
58: VecGetOwnershipRange(u, &low, &high);
59: VecGetLocalSize(u, &ldim);
60: for (i = 0; i < ldim; i++) {
61: iglobal = i + low;
62: v = (PetscScalar)(i + low);
63: VecSetValues(u, 1, &iglobal, &v, INSERT_VALUES);
64: }
65: VecAssemblyBegin(u);
66: VecAssemblyEnd(u);
67: VecView(u, PETSC_VIEWER_STDOUT_WORLD);
69: if (isbinary) {
70: PetscPrintf(PETSC_COMM_WORLD, "writing vector in binary to vector.dat ...\n");
71: PetscViewerBinaryOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer);
72: #if defined(PETSC_HAVE_HDF5)
73: } else if (ishdf5) {
74: PetscPrintf(PETSC_COMM_WORLD, "writing vector in hdf5 to vector.dat ...\n");
75: PetscViewerHDF5Open(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer);
76: #endif
77: #if defined(PETSC_HAVE_ADIOS)
78: } else if (isadios) {
79: PetscPrintf(PETSC_COMM_WORLD, "writing vector in adios to vector.dat ...\n");
80: PetscViewerADIOSOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer);
81: #endif
82: } else SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "No data format specified, run with one of -binary -hdf5 -adios options");
83: VecView(u, viewer);
84: PetscViewerDestroy(&viewer);
85: VecDestroy(&u);
87: PetscLogEventEnd(VECTOR_GENERATE, 0, 0, 0, 0);
89: /* PART 2: Read in vector in binary format */
91: /* Read new vector in binary format */
92: PetscLogEventRegister("Read Vector", VEC_CLASSID, &VECTOR_READ);
93: PetscLogEventBegin(VECTOR_READ, 0, 0, 0, 0);
94: if (mpiio_use) {
95: PetscPrintf(PETSC_COMM_WORLD, "Using MPI IO for reading the vector\n");
96: PetscOptionsSetValue(NULL, "-viewer_binary_mpiio", "");
97: }
98: if (isbinary) {
99: PetscPrintf(PETSC_COMM_WORLD, "reading vector in binary from vector.dat ...\n");
100: PetscViewerBinaryOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_READ, &viewer);
101: PetscViewerBinarySetFlowControl(viewer, 2);
102: #if defined(PETSC_HAVE_HDF5)
103: } else if (ishdf5) {
104: PetscPrintf(PETSC_COMM_WORLD, "reading vector in hdf5 from vector.dat ...\n");
105: PetscViewerHDF5Open(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_READ, &viewer);
106: #endif
107: #if defined(PETSC_HAVE_ADIOS)
108: } else if (isadios) {
109: PetscPrintf(PETSC_COMM_WORLD, "reading vector in adios from vector.dat ...\n");
110: PetscViewerADIOSOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_READ, &viewer);
111: #endif
112: }
113: VecCreate(PETSC_COMM_WORLD, &u);
114: PetscObjectSetName((PetscObject)u, "Test_Vec");
116: if (vstage2) {
117: PetscPrintf(PETSC_COMM_WORLD, "Setting vector sizes...\n");
118: if (size > 1) {
119: if (rank == 0) {
120: lsize = m / size + size;
121: VecSetSizes(u, lsize, m);
122: } else if (rank == size - 1) {
123: lsize = m / size - size;
124: VecSetSizes(u, lsize, m);
125: } else {
126: lsize = m / size;
127: VecSetSizes(u, lsize, m);
128: }
129: } else {
130: VecSetSizes(u, m, m);
131: }
132: }
134: if (vstage3) {
135: PetscPrintf(PETSC_COMM_WORLD, "Setting vector type...\n");
136: VecSetType(u, VECMPI);
137: }
138: VecLoad(u, viewer);
139: PetscViewerDestroy(&viewer);
140: PetscLogEventEnd(VECTOR_READ, 0, 0, 0, 0);
141: VecView(u, PETSC_VIEWER_STDOUT_WORLD);
142: VecGetArrayRead(u, &values);
143: VecGetLocalSize(u, &ldim);
144: VecGetOwnershipRange(u, &low, NULL);
146: VecRestoreArrayRead(u, &values);
148: /* Free data structures */
149: VecDestroy(&u);
150: PetscFinalize();
151: return 0;
152: }
154: /*TEST
156: test:
157: nsize: 2
158: args: -binary
160: test:
161: suffix: 2
162: nsize: 3
163: args: -binary
165: test:
166: suffix: 3
167: nsize: 5
168: args: -binary
170: test:
171: suffix: 4
172: requires: hdf5
173: nsize: 2
174: args: -hdf5
176: test:
177: suffix: 5
178: nsize: 4
179: args: -binary -sizes_set
181: test:
182: suffix: 6
183: requires: hdf5
184: nsize: 4
185: args: -hdf5 -sizes_set
187: TEST*/