Actual source code: ex10.c
1: 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";
3: #include <petscvec.h>
4: #include <petscviewerhdf5.h>
6: /* Note: Most applications would not read and write a vector within
7: the same program. This example is intended only to demonstrate
8: both input and output and is written for use with either 1,2,or 4 processors. */
10: int main(int argc, char **args)
11: {
12: PetscMPIInt rank, size;
13: PetscInt i, m = 20, low, high, ldim, iglobal, lsize;
14: PetscScalar v;
15: Vec u;
16: PetscViewer viewer;
17: PetscBool vstage2, vstage3, mpiio_use, isbinary = PETSC_FALSE;
18: #if defined(PETSC_HAVE_HDF5)
19: PetscBool ishdf5 = PETSC_FALSE;
20: #endif
21: #if defined(PETSC_HAVE_ADIOS)
22: PetscBool isadios = PETSC_FALSE;
23: #endif
24: PetscScalar const *values;
25: PetscLogEvent VECTOR_GENERATE, VECTOR_READ;
27: PetscFunctionBeginUser;
28: PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
29: mpiio_use = vstage2 = vstage3 = PETSC_FALSE;
31: PetscCall(PetscOptionsGetBool(NULL, NULL, "-binary", &isbinary, NULL));
32: #if defined(PETSC_HAVE_HDF5)
33: PetscCall(PetscOptionsGetBool(NULL, NULL, "-hdf5", &ishdf5, NULL));
34: #endif
35: #if defined(PETSC_HAVE_ADIOS)
36: PetscCall(PetscOptionsGetBool(NULL, NULL, "-adios", &isadios, NULL));
37: #endif
38: PetscCall(PetscOptionsGetBool(NULL, NULL, "-mpiio", &mpiio_use, NULL));
39: PetscCall(PetscOptionsGetBool(NULL, NULL, "-sizes_set", &vstage2, NULL));
40: PetscCall(PetscOptionsGetBool(NULL, NULL, "-type_set", &vstage3, NULL));
42: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
43: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
44: PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL));
46: /* PART 1: Generate vector, then write it in the given data format */
48: PetscCall(PetscLogEventRegister("Generate Vector", VEC_CLASSID, &VECTOR_GENERATE));
49: PetscCall(PetscLogEventBegin(VECTOR_GENERATE, 0, 0, 0, 0));
50: /* Generate vector */
51: PetscCall(VecCreate(PETSC_COMM_WORLD, &u));
52: PetscCall(PetscObjectSetName((PetscObject)u, "Test_Vec"));
53: PetscCall(VecSetSizes(u, PETSC_DECIDE, m));
54: PetscCall(VecSetFromOptions(u));
55: PetscCall(VecGetOwnershipRange(u, &low, &high));
56: PetscCall(VecGetLocalSize(u, &ldim));
57: for (i = 0; i < ldim; i++) {
58: iglobal = i + low;
59: v = (PetscScalar)(i + low);
60: PetscCall(VecSetValues(u, 1, &iglobal, &v, INSERT_VALUES));
61: }
62: PetscCall(VecAssemblyBegin(u));
63: PetscCall(VecAssemblyEnd(u));
64: PetscCall(VecView(u, PETSC_VIEWER_STDOUT_WORLD));
66: if (isbinary) {
67: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "writing vector in binary to vector.dat ...\n"));
68: PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer));
69: #if defined(PETSC_HAVE_HDF5)
70: } else if (ishdf5) {
71: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "writing vector in hdf5 to vector.dat ...\n"));
72: PetscCall(PetscViewerHDF5Open(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer));
73: #endif
74: #if defined(PETSC_HAVE_ADIOS)
75: } else if (isadios) {
76: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "writing vector in adios to vector.dat ...\n"));
77: PetscCall(PetscViewerADIOSOpen(PETSC_COMM_WORLD, "vector.dat", FILE_MODE_WRITE, &viewer));
78: #endif
79: } else SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "No data format specified, run with one of -binary -hdf5 -adios options");
80: PetscCall(VecView(u, viewer));
81: PetscCall(PetscViewerDestroy(&viewer));
82: PetscCall(VecDestroy(&u));
84: PetscCall(PetscLogEventEnd(VECTOR_GENERATE, 0, 0, 0, 0));
86: /* PART 2: Read in vector in binary format */
88: char read_file[PETSC_MAX_PATH_LEN] = "vector.dat";
89: // By default, read the same file we just wrote, but with -read_file, read a different input file.
90: PetscCall(PetscOptionsGetString(NULL, NULL, "-read_file", read_file, sizeof read_file, NULL));
91: /* Read new vector in binary format */
92: PetscCall(PetscLogEventRegister("Read Vector", VEC_CLASSID, &VECTOR_READ));
93: PetscCall(PetscLogEventBegin(VECTOR_READ, 0, 0, 0, 0));
94: if (mpiio_use) {
95: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Using MPI IO for reading the vector\n"));
96: PetscCall(PetscOptionsSetValue(NULL, "-viewer_binary_mpiio", ""));
97: }
98: if (isbinary) {
99: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "reading vector in binary from %s ...\n", read_file));
100: PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, read_file, FILE_MODE_READ, &viewer));
101: PetscCall(PetscViewerBinarySetFlowControl(viewer, 2));
102: #if defined(PETSC_HAVE_HDF5)
103: } else if (ishdf5) {
104: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "reading vector in hdf5 from %s ...\n", read_file));
105: PetscCall(PetscViewerHDF5Open(PETSC_COMM_WORLD, read_file, FILE_MODE_READ, &viewer));
106: #endif
107: #if defined(PETSC_HAVE_ADIOS)
108: } else if (isadios) {
109: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "reading vector in adios from %s ...\n", read_file));
110: PetscCall(PetscViewerADIOSOpen(PETSC_COMM_WORLD, read_file, FILE_MODE_READ, &viewer));
111: #endif
112: }
113: PetscCall(VecCreate(PETSC_COMM_WORLD, &u));
114: PetscCall(PetscObjectSetName((PetscObject)u, "Test_Vec"));
116: if (vstage2) {
117: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Setting vector sizes...\n"));
118: if (size > 1) {
119: if (rank == 0) {
120: lsize = m / size + size;
121: PetscCall(VecSetSizes(u, lsize, m));
122: } else if (rank == size - 1) {
123: lsize = m / size - size;
124: PetscCall(VecSetSizes(u, lsize, m));
125: } else {
126: lsize = m / size;
127: PetscCall(VecSetSizes(u, lsize, m));
128: }
129: } else {
130: PetscCall(VecSetSizes(u, m, m));
131: }
132: }
134: if (vstage3) {
135: PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Setting vector type...\n"));
136: PetscCall(VecSetType(u, VECMPI));
137: }
138: PetscCall(VecLoad(u, viewer));
139: PetscCall(PetscViewerDestroy(&viewer));
140: PetscCall(PetscLogEventEnd(VECTOR_READ, 0, 0, 0, 0));
141: PetscCall(VecView(u, PETSC_VIEWER_STDOUT_WORLD));
142: PetscCall(VecGetArrayRead(u, &values));
143: PetscCall(VecGetLocalSize(u, &ldim));
144: PetscCall(VecGetOwnershipRange(u, &low, NULL));
145: for (i = 0; i < ldim; i++) PetscCheck(values[i] == (PetscScalar)(i + low), PETSC_COMM_WORLD, PETSC_ERR_SUP, "Data check failed!");
146: PetscCall(VecRestoreArrayRead(u, &values));
148: /* Free data structures */
149: PetscCall(VecDestroy(&u));
150: PetscCall(PetscFinalize());
151: return 0;
152: }
154: /*TEST
156: test:
157: nsize: 2
158: args: -binary
160: test:
161: suffix: binary_i32
162: requires: double !complex
163: nsize: 2
164: args: -binary -read_file ${wPETSC_DIR}/share/petsc/datafiles/vectors/vector-i32.dat
165: filter: sed "s|in binary from .*|in binary from vector-i32.dat ...|"
167: test:
168: suffix: binary_i64
169: requires: double !complex
170: nsize: 2
171: args: -binary -read_file ${wPETSC_DIR}/share/petsc/datafiles/vectors/vector-i64.dat
172: filter: sed "s|in binary from .*|in binary from vector-i64.dat ...|"
174: test:
175: suffix: 2
176: nsize: 3
177: args: -binary
179: test:
180: suffix: 3
181: nsize: 5
182: args: -binary
184: test:
185: suffix: 4
186: requires: hdf5
187: nsize: 2
188: args: -hdf5
190: test:
191: suffix: 5
192: nsize: 4
193: args: -binary -sizes_set
195: test:
196: suffix: 6
197: requires: hdf5
198: nsize: 4
199: args: -hdf5 -sizes_set
201: TEST*/