1c4762a1bSJed Brown static const char help[] = "Test parallel assembly of SBAIJ matrices\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5c4762a1bSJed Brown PetscErrorCode Assemble(MPI_Comm comm,PetscInt n,MatType mtype) 6c4762a1bSJed Brown { 7c4762a1bSJed Brown Mat A; 8c4762a1bSJed Brown PetscInt first,last,i; 9c4762a1bSJed Brown PetscMPIInt rank,size; 10c4762a1bSJed Brown 11c4762a1bSJed Brown PetscFunctionBegin; 129566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); 139566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, PETSC_DECIDE,PETSC_DECIDE,n,n)); 149566063dSJacob Faibussowitsch PetscCall(MatSetType(A,MATMPISBAIJ)); 159566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(A)); 169566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(comm,&size)); 179566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(comm,&rank)); 18c4762a1bSJed Brown if (rank < size-1) { 199566063dSJacob Faibussowitsch PetscCall(MatMPISBAIJSetPreallocation(A,1,1,NULL,1,NULL)); 20c4762a1bSJed Brown } else { 219566063dSJacob Faibussowitsch PetscCall(MatMPISBAIJSetPreallocation(A,1,2,NULL,0,NULL)); 22c4762a1bSJed Brown } 239566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(A,&first,&last)); 249566063dSJacob Faibussowitsch PetscCall(MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_TRUE)); 25c4762a1bSJed Brown last--; 26c4762a1bSJed Brown for (i=first; i<=last; i++) { 279566063dSJacob Faibussowitsch PetscCall(MatSetValue(A,i,i,2.,INSERT_VALUES)); 289566063dSJacob Faibussowitsch if (i != n-1) PetscCall(MatSetValue(A,i,n-1,-1.,INSERT_VALUES)); 29c4762a1bSJed Brown } 309566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 319566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 329566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 33c4762a1bSJed Brown PetscFunctionReturn(0); 34c4762a1bSJed Brown } 35c4762a1bSJed Brown 36c4762a1bSJed Brown int main(int argc,char *argv[]) 37c4762a1bSJed Brown { 38c4762a1bSJed Brown MPI_Comm comm; 39c4762a1bSJed Brown PetscInt n = 6; 40c4762a1bSJed Brown 41*327415f7SBarry Smith PetscFunctionBeginUser; 429566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 43c4762a1bSJed Brown comm = PETSC_COMM_WORLD; 449566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 459566063dSJacob Faibussowitsch PetscCall(Assemble(comm,n,MATMPISBAIJ)); 469566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 47b122ec5aSJacob Faibussowitsch return 0; 48c4762a1bSJed Brown } 49c4762a1bSJed Brown 50c4762a1bSJed Brown /*TEST 51c4762a1bSJed Brown 52c4762a1bSJed Brown test: 53c4762a1bSJed Brown nsize: 4 5497929ea7SJunchao Zhang args: -n 1000 -mat_view ascii::ascii_info_detail 55dfd57a17SPierre Jolivet requires: double !complex !defined(PETSC_USE_64BIT_INDICES) 56c4762a1bSJed Brown 57c4762a1bSJed Brown TEST*/ 58