/*
DMSetVI - Marks a DM as associated with a VI problem. This causes the interpolation/restriction operators to
be restricted to only those variables NOT associated with active constraints.
*/
PetscErrorCode DMSetVI(DM dm,IS inactive)
{
PetscErrorCode ierr;
PetscContainer isnes;
DM_SNESVI *dmsnesvi;
PetscFunctionBegin;
if (!dm) PetscFunctionReturn(0);
ierr = PetscObjectReference((PetscObject)inactive);CHKERRQ(ierr);
ierr = PetscObjectQuery((PetscObject)dm,"VI",(PetscObject *)&isnes);CHKERRQ(ierr);
if (!isnes) {
ierr = PetscContainerCreate(((PetscObject)dm)->comm,&isnes);CHKERRQ(ierr);
ierr = PetscContainerSetUserDestroy(isnes,(PetscErrorCode (*)(void*))DMDestroy_SNESVI);CHKERRQ(ierr);
ierr = PetscNew(DM_SNESVI,&dmsnesvi);CHKERRQ(ierr);
ierr = PetscContainerSetPointer(isnes,(void*)dmsnesvi);CHKERRQ(ierr);
ierr = PetscObjectCompose((PetscObject)dm,"VI",(PetscObject)isnes);CHKERRQ(ierr);
ierr = PetscContainerDestroy(&isnes);CHKERRQ(ierr);
dmsnesvi->createinterpolation = dm->ops->createinterpolation;
dm->ops->createinterpolation = DMCreateInterpolation_SNESVI;
dmsnesvi->coarsen = dm->ops->coarsen;
dm->ops->coarsen = DMCoarsen_SNESVI;
dmsnesvi->createglobalvector = dm->ops->createglobalvector;
dm->ops->createglobalvector = DMCreateGlobalVector_SNESVI;
} else {
ierr = PetscContainerGetPointer(isnes,(void**)&dmsnesvi);CHKERRQ(ierr);
ierr = ISDestroy(&dmsnesvi->inactive);CHKERRQ(ierr);
}
ierr = DMClearGlobalVectors(dm);CHKERRQ(ierr);
ierr = ISGetLocalSize(inactive,&dmsnesvi->n);CHKERRQ(ierr);
dmsnesvi->inactive = inactive;
dmsnesvi->dm = dm;
PetscFunctionReturn(0);
}
PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIAIJ(Mat A,Mat B,PetscReal fill,Mat *C)
{
PetscErrorCode ierr;
PetscInt start,end;
Mat_MatMatMultMPI *mult;
PetscContainer container;
PetscFunctionBegin;
if (A->cmap->rstart != B->rmap->rstart || A->cmap->rend != B->rmap->rend){
SETERRQ4(PETSC_ERR_ARG_SIZ,"Matrix local dimensions are incompatible, (%D, %D) != (%D,%D)",A->cmap->rstart,A->cmap->rend,B->rmap->rstart,B->rmap->rend);
}
ierr = PetscNew(Mat_MatMatMultMPI,&mult);CHKERRQ(ierr);
/* create a seq matrix B_seq = submatrix of B by taking rows of B that equal to nonzero col of A */
ierr = MatGetBrowsOfAcols(A,B,MAT_INITIAL_MATRIX,&mult->isrowb,&mult->iscolb,&mult->brstart,&mult->B_seq);CHKERRQ(ierr);
/* create a seq matrix A_seq = submatrix of A by taking all local rows of A */
start = A->rmap->rstart; end = A->rmap->rend;
ierr = ISCreateStride(PETSC_COMM_SELF,end-start,start,1,&mult->isrowa);CHKERRQ(ierr);
ierr = MatGetLocalMatCondensed(A,MAT_INITIAL_MATRIX,&mult->isrowa,&mult->isrowb,&mult->A_loc);CHKERRQ(ierr);
/* compute C_seq = A_seq * B_seq */
ierr = MatMatMult_SeqAIJ_SeqAIJ(mult->A_loc,mult->B_seq,MAT_INITIAL_MATRIX,fill,&mult->C_seq);CHKERRQ(ierr);
/* create mpi matrix C by concatinating C_seq */
ierr = PetscObjectReference((PetscObject)mult->C_seq);CHKERRQ(ierr); /* prevent C_seq being destroyed by MatMerge() */
ierr = MatMerge(((PetscObject)A)->comm,mult->C_seq,B->cmap->n,MAT_INITIAL_MATRIX,C);CHKERRQ(ierr);
/* attach the supporting struct to C for reuse of symbolic C */
ierr = PetscContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr);
ierr = PetscContainerSetPointer(container,mult);CHKERRQ(ierr);
ierr = PetscObjectCompose((PetscObject)(*C),"Mat_MatMatMultMPI",(PetscObject)container);CHKERRQ(ierr);
ierr = PetscContainerSetUserDestroy(container,PetscContainerDestroy_Mat_MatMatMultMPI);CHKERRQ(ierr);
mult->MatDestroy = (*C)->ops->destroy;
mult->MatDuplicate = (*C)->ops->duplicate;
(*C)->ops->destroy = MatDestroy_MPIAIJ_MatMatMult;
(*C)->ops->duplicate = MatDuplicate_MPIAIJ_MatMatMult;
PetscFunctionReturn(0);
}
PetscErrorCode MatMatMultSymbolic_MPIAIJ_MPIDense(Mat A,Mat B,PetscReal fill,Mat *C)
{
PetscErrorCode ierr;
Mat_MPIAIJ *aij = (Mat_MPIAIJ*) A->data;
PetscInt nz = aij->B->cmap->n;
PetscContainer cont;
MPIAIJ_MPIDense *contents;
VecScatter ctx = aij->Mvctx;
VecScatter_MPI_General *from = (VecScatter_MPI_General*) ctx->fromdata;
VecScatter_MPI_General *to = ( VecScatter_MPI_General*) ctx->todata;
PetscInt m=A->rmap->n,n=B->cmap->n;
PetscFunctionBegin;
ierr = MatCreate(((PetscObject)B)->comm,C);CHKERRQ(ierr);
ierr = MatSetSizes(*C,m,n,A->rmap->N,B->cmap->N);CHKERRQ(ierr);
ierr = MatSetType(*C,MATMPIDENSE);CHKERRQ(ierr);
ierr = MatAssemblyBegin(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = MatAssemblyEnd(*C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
ierr = PetscContainerCreate(((PetscObject)A)->comm,&cont);CHKERRQ(ierr);
ierr = PetscNew(MPIAIJ_MPIDense,&contents);CHKERRQ(ierr);
ierr = PetscContainerSetPointer(cont,contents);CHKERRQ(ierr);
ierr = PetscContainerSetUserDestroy(cont,MPIAIJ_MPIDenseDestroy);CHKERRQ(ierr);
/* Create work matrix used to store off processor rows of B needed for local product */
ierr = MatCreateSeqDense(PETSC_COMM_SELF,nz,B->cmap->N,PETSC_NULL,&contents->workB);CHKERRQ(ierr);
/* Create work arrays needed */
ierr = PetscMalloc4(B->cmap->N*from->starts[from->n],PetscScalar,&contents->rvalues,
B->cmap->N*to->starts[to->n],PetscScalar,&contents->svalues,
from->n,MPI_Request,&contents->rwaits,
to->n,MPI_Request,&contents->swaits);CHKERRQ(ierr);
ierr = PetscObjectCompose((PetscObject)(*C),"workB",(PetscObject)cont);CHKERRQ(ierr);
ierr = PetscContainerDestroy(cont);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
PetscErrorCode MatRARtSymbolic_SeqAIJ_SeqAIJ(Mat A,Mat R,PetscReal fill,Mat *C)
{
PetscErrorCode ierr;
Mat P;
PetscInt *rti,*rtj;
Mat_RARt *rart;
PetscContainer container;
MatTransposeColoring matcoloring;
ISColoring iscoloring;
Mat Rt_dense,RARt_dense;
PetscLogDouble GColor=0.0,MCCreate=0.0,MDenCreate=0.0,t0,tf,etime=0.0;
Mat_SeqAIJ *c;
PetscFunctionBegin;
ierr = PetscGetTime(&t0);CHKERRQ(ierr);
/* create symbolic P=Rt */
ierr = MatGetSymbolicTranspose_SeqAIJ(R,&rti,&rtj);CHKERRQ(ierr);
ierr = MatCreateSeqAIJWithArrays(PETSC_COMM_SELF,R->cmap->n,R->rmap->n,rti,rtj,PETSC_NULL,&P);CHKERRQ(ierr);
/* get symbolic C=Pt*A*P */
ierr = MatPtAPSymbolic_SeqAIJ_SeqAIJ(A,P,fill,C);CHKERRQ(ierr);
(*C)->rmap->bs = R->rmap->bs;
(*C)->cmap->bs = R->rmap->bs;
/* create a supporting struct */
ierr = PetscNew(Mat_RARt,&rart);CHKERRQ(ierr);
/* attach the supporting struct to C */
ierr = PetscContainerCreate(PETSC_COMM_SELF,&container);CHKERRQ(ierr);
ierr = PetscContainerSetPointer(container,rart);CHKERRQ(ierr);
ierr = PetscContainerSetUserDestroy(container,PetscContainerDestroy_Mat_RARt);CHKERRQ(ierr);
ierr = PetscObjectCompose((PetscObject)(*C),"Mat_RARt",(PetscObject)container);CHKERRQ(ierr);
ierr = PetscContainerDestroy(&container);CHKERRQ(ierr);
ierr = PetscGetTime(&tf);CHKERRQ(ierr);
etime += tf - t0;
/* Create MatTransposeColoring from symbolic C=R*A*R^T */
c=(Mat_SeqAIJ*)(*C)->data;
ierr = PetscGetTime(&t0);CHKERRQ(ierr);
ierr = MatGetColoring(*C,MATCOLORINGLF,&iscoloring);CHKERRQ(ierr);
ierr = PetscGetTime(&tf);CHKERRQ(ierr);
GColor += tf - t0;
ierr = PetscGetTime(&t0);CHKERRQ(ierr);
ierr = MatTransposeColoringCreate(*C,iscoloring,&matcoloring);CHKERRQ(ierr);
rart->matcoloring = matcoloring;
ierr = ISColoringDestroy(&iscoloring);CHKERRQ(ierr);
ierr = PetscGetTime(&tf);CHKERRQ(ierr);
MCCreate += tf - t0;
ierr = PetscGetTime(&t0);CHKERRQ(ierr);
/* Create Rt_dense */
ierr = MatCreate(PETSC_COMM_SELF,&Rt_dense);CHKERRQ(ierr);
ierr = MatSetSizes(Rt_dense,A->cmap->n,matcoloring->ncolors,A->cmap->n,matcoloring->ncolors);CHKERRQ(ierr);
ierr = MatSetType(Rt_dense,MATSEQDENSE);CHKERRQ(ierr);
ierr = MatSeqDenseSetPreallocation(Rt_dense,PETSC_NULL);CHKERRQ(ierr);
Rt_dense->assembled = PETSC_TRUE;
rart->Rt = Rt_dense;
/* Create RARt_dense = R*A*Rt_dense */
ierr = MatCreate(PETSC_COMM_SELF,&RARt_dense);CHKERRQ(ierr);
ierr = MatSetSizes(RARt_dense,(*C)->rmap->n,matcoloring->ncolors,(*C)->rmap->n,matcoloring->ncolors);CHKERRQ(ierr);
ierr = MatSetType(RARt_dense,MATSEQDENSE);CHKERRQ(ierr);
ierr = MatSeqDenseSetPreallocation(RARt_dense,PETSC_NULL);CHKERRQ(ierr);
rart->RARt = RARt_dense;
/* Allocate work array to store columns of A*R^T used in MatMatMatMultNumeric_SeqAIJ_SeqAIJ_SeqDense() */
ierr = PetscMalloc(A->rmap->n*4*sizeof(PetscScalar),&rart->work);CHKERRQ(ierr);
ierr = PetscGetTime(&tf);CHKERRQ(ierr);
MDenCreate += tf - t0;
rart->destroy = (*C)->ops->destroy;
(*C)->ops->destroy = MatDestroy_SeqAIJ_RARt;
/* clean up */
ierr = MatRestoreSymbolicTranspose_SeqAIJ(R,&rti,&rtj);CHKERRQ(ierr);
ierr = MatDestroy(&P);CHKERRQ(ierr);
#if defined(PETSC_USE_INFO)
{
PetscReal density= (PetscReal)(c->nz)/(RARt_dense->rmap->n*RARt_dense->cmap->n);
ierr = PetscInfo6(*C,"RARt_den %D %D; Rt_den %D %D, (RARt->nz %D)/(m*ncolors)=%g\n",RARt_dense->rmap->n,RARt_dense->cmap->n,Rt_dense->rmap->n,Rt_dense->cmap->n,c->nz,density);CHKERRQ(ierr);
ierr = PetscInfo5(*C,"Sym = GetColor %g + MColorCreate %g + MDenCreate %g + other %g = %g\n",GColor,MCCreate,MDenCreate,etime,GColor+MCCreate+MDenCreate+etime);CHKERRQ(ierr);
}
#endif
PetscFunctionReturn(0);
}
