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; 125f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 135f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(A, PETSC_DECIDE,PETSC_DECIDE,n,n)); 145f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetType(A,MATMPISBAIJ)); 155f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(A)); 165f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(comm,&size)); 175f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(comm,&rank)); 18c4762a1bSJed Brown if (rank < size-1) { 195f80ce2aSJacob Faibussowitsch CHKERRQ(MatMPISBAIJSetPreallocation(A,1,1,NULL,1,NULL)); 20c4762a1bSJed Brown } else { 215f80ce2aSJacob Faibussowitsch CHKERRQ(MatMPISBAIJSetPreallocation(A,1,2,NULL,0,NULL)); 22c4762a1bSJed Brown } 235f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(A,&first,&last)); 245f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_TRUE)); 25c4762a1bSJed Brown last--; 26c4762a1bSJed Brown for (i=first; i<=last; i++) { 275f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValue(A,i,i,2.,INSERT_VALUES)); 285f80ce2aSJacob Faibussowitsch if (i != n-1) CHKERRQ(MatSetValue(A,i,n-1,-1.,INSERT_VALUES)); 29c4762a1bSJed Brown } 305f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 315f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 325f80ce2aSJacob Faibussowitsch CHKERRQ(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*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&argv,NULL,help)); 42c4762a1bSJed Brown comm = PETSC_COMM_WORLD; 435f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 445f80ce2aSJacob Faibussowitsch CHKERRQ(Assemble(comm,n,MATMPISBAIJ)); 45*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 46*b122ec5aSJacob Faibussowitsch return 0; 47c4762a1bSJed Brown } 48c4762a1bSJed Brown 49c4762a1bSJed Brown /*TEST 50c4762a1bSJed Brown 51c4762a1bSJed Brown test: 52c4762a1bSJed Brown nsize: 4 5397929ea7SJunchao Zhang args: -n 1000 -mat_view ascii::ascii_info_detail 54dfd57a17SPierre Jolivet requires: double !complex !defined(PETSC_USE_64BIT_INDICES) 55c4762a1bSJed Brown 56c4762a1bSJed Brown TEST*/ 57