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petsc - determin vec type before DMSetFromOptions #1757

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Feb 17, 2025
Merged

petsc - determin vec type before DMSetFromOptions #1757

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44 changes: 22 additions & 22 deletions examples/petsc/bpssphere.c
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,27 @@ int main(int argc, char **argv) {
PetscCall(PetscOptionsBool("-simplex", "Use simplices, or tensor product cells", NULL, simplex, &simplex, NULL));
PetscOptionsEnd();

// Set up libCEED
CeedInit(ceed_resource, &ceed);
CeedMemType mem_type_backend;
CeedGetPreferredMemType(ceed, &mem_type_backend);

// Set mesh vec_type
switch (mem_type_backend) {
case CEED_MEM_HOST:
vec_type = VECSTANDARD;
break;
case CEED_MEM_DEVICE: {
const char *resolved;

CeedGetResource(ceed, &resolved);
if (strstr(resolved, "/gpu/cuda")) vec_type = VECCUDA;
else if (strstr(resolved, "/gpu/hip/occa")) vec_type = VECSTANDARD; // https://github.com/CEED/libCEED/issues/678
else if (strstr(resolved, "/gpu/hip")) vec_type = VECHIP;
else vec_type = VECSTANDARD;
}
}

// Setup DM
if (read_mesh) {
PetscCall(DMPlexCreateFromFile(PETSC_COMM_WORLD, filename, NULL, PETSC_TRUE, &dm));
Expand All @@ -104,6 +125,7 @@ int main(int argc, char **argv) {
// Refine DMPlex with uniform refinement using runtime option -dm_refine
PetscCall(DMPlexSetRefinementUniform(dm, PETSC_TRUE));
}
PetscCall(DMSetVecType(dm, vec_type));
PetscCall(DMSetFromOptions(dm));
// View DMPlex via runtime option
PetscCall(DMViewFromOptions(dm, NULL, "-dm_view"));
Expand All @@ -125,28 +147,6 @@ int main(int argc, char **argv) {
PetscCall(MatCreateShell(comm, l_size, l_size, g_size, g_size, op_apply_ctx, &mat_O));
PetscCall(MatShellSetOperation(mat_O, MATOP_MULT, (void (*)(void))MatMult_Ceed));

// Set up libCEED
CeedInit(ceed_resource, &ceed);
CeedMemType mem_type_backend;
CeedGetPreferredMemType(ceed, &mem_type_backend);

// Set mesh vec_type
switch (mem_type_backend) {
case CEED_MEM_HOST:
vec_type = VECSTANDARD;
break;
case CEED_MEM_DEVICE: {
const char *resolved;

CeedGetResource(ceed, &resolved);
if (strstr(resolved, "/gpu/cuda")) vec_type = VECCUDA;
else if (strstr(resolved, "/gpu/hip/occa")) vec_type = VECSTANDARD; // https://github.com/CEED/libCEED/issues/678
else if (strstr(resolved, "/gpu/hip")) vec_type = VECHIP;
else vec_type = VECSTANDARD;
}
}
PetscCall(DMSetVecType(dm, vec_type));

// Print summary
if (!test_mode) {
PetscInt P = degree + 1, Q = P + q_extra;
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