PetscErrorCode EPSSetUp_Arnoldi(EPS eps) { PetscErrorCode ierr; PetscFunctionBegin; ierr = EPSSetDimensions_Default(eps,eps->nev,&eps->ncv,&eps->mpd);CHKERRQ(ierr); if (eps->ncv>eps->nev+eps->mpd) SETERRQ(PetscObjectComm((PetscObject)eps),1,"The value of ncv must not be larger than nev+mpd"); if (!eps->max_it) eps->max_it = PetscMax(100,2*eps->n/eps->ncv); if (!eps->which) { ierr = EPSSetWhichEigenpairs_Default(eps);CHKERRQ(ierr); } if (eps->ishermitian && (eps->which==EPS_LARGEST_IMAGINARY || eps->which==EPS_SMALLEST_IMAGINARY)) SETERRQ(PetscObjectComm((PetscObject)eps),1,"Wrong value of eps->which"); if (!eps->extraction) { ierr = EPSSetExtraction(eps,EPS_RITZ);CHKERRQ(ierr); } if (eps->arbitrary) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Arbitrary selection of eigenpairs not supported in this solver"); ierr = EPSAllocateSolution(eps,1);CHKERRQ(ierr); ierr = EPS_SetInnerProduct(eps);CHKERRQ(ierr); ierr = DSSetType(eps->ds,DSNHEP);CHKERRQ(ierr); if (eps->extraction==EPS_REFINED || eps->extraction==EPS_REFINED_HARMONIC) { ierr = DSSetRefined(eps->ds,PETSC_TRUE);CHKERRQ(ierr); } ierr = DSSetExtraRow(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,eps->ncv+1);CHKERRQ(ierr); /* dispatch solve method */ if (eps->isgeneralized && eps->ishermitian && !eps->ispositive) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Requested method does not work for indefinite problems"); eps->ops->solve = EPSSolve_Arnoldi; PetscFunctionReturn(0); }
PetscErrorCode EPSSetUp_Lanczos(EPS eps) { EPS_LANCZOS *lanczos = (EPS_LANCZOS*)eps->data; BVOrthogRefineType refine; PetscReal eta; PetscErrorCode ierr; PetscFunctionBegin; ierr = EPSSetDimensions_Default(eps,eps->nev,&eps->ncv,&eps->mpd);CHKERRQ(ierr); if (eps->ncv>eps->nev+eps->mpd) SETERRQ(PetscObjectComm((PetscObject)eps),1,"The value of ncv must not be larger than nev+mpd"); if (!eps->max_it) eps->max_it = PetscMax(100,2*eps->n/eps->ncv); if (!eps->which) { ierr = EPSSetWhichEigenpairs_Default(eps);CHKERRQ(ierr); } switch (eps->which) { case EPS_LARGEST_IMAGINARY: case EPS_SMALLEST_IMAGINARY: case EPS_TARGET_IMAGINARY: SETERRQ(PetscObjectComm((PetscObject)eps),1,"Wrong value of eps->which"); default: ; /* default case to remove warning */ } if (!eps->extraction) { ierr = EPSSetExtraction(eps,EPS_RITZ);CHKERRQ(ierr); } else if (eps->extraction!=EPS_RITZ) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Unsupported extraction type"); if (eps->arbitrary) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Arbitrary selection of eigenpairs not supported in this solver"); ierr = EPSAllocateSolution(eps,1);CHKERRQ(ierr); ierr = EPS_SetInnerProduct(eps);CHKERRQ(ierr); if (lanczos->reorthog != EPS_LANCZOS_REORTHOG_FULL) { ierr = BVGetOrthogonalization(eps->V,NULL,&refine,&eta);CHKERRQ(ierr); ierr = BVSetOrthogonalization(eps->V,BV_ORTHOG_MGS,refine,eta);CHKERRQ(ierr); ierr = PetscInfo(eps,"Switching to MGS orthogonalization\n");CHKERRQ(ierr); } if (lanczos->reorthog == EPS_LANCZOS_REORTHOG_SELECTIVE) { ierr = BVDuplicate(eps->V,&lanczos->AV);CHKERRQ(ierr); } ierr = DSSetType(eps->ds,DSHEP);CHKERRQ(ierr); ierr = DSSetCompact(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,eps->ncv+1);CHKERRQ(ierr); if (lanczos->reorthog == EPS_LANCZOS_REORTHOG_LOCAL) { ierr = EPSSetWorkVecs(eps,1);CHKERRQ(ierr); } /* dispatch solve method */ if (!eps->ishermitian) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Requested method is only available for Hermitian problems"); if (eps->isgeneralized && eps->ishermitian && !eps->ispositive) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Requested method does not work for indefinite problems"); eps->ops->solve = EPSSolve_Lanczos; PetscFunctionReturn(0); }
PetscErrorCode EPSSetUp_LAPACK(EPS eps) { PetscErrorCode ierr,ierra,ierrb; PetscBool isshift,denseok=PETSC_FALSE; Mat A,B,OP,Adense,Bdense; PetscScalar shift,*Ap,*Bp; PetscInt i,ld,nmat; KSP ksp; PC pc; Vec v; PetscFunctionBegin; eps->ncv = eps->n; if (eps->mpd) { ierr = PetscInfo(eps,"Warning: parameter mpd ignored\n");CHKERRQ(ierr); } if (!eps->which) { ierr = EPSSetWhichEigenpairs_Default(eps);CHKERRQ(ierr); } if (eps->balance!=EPS_BALANCE_NONE) { ierr = PetscInfo(eps,"Warning: balancing ignored\n");CHKERRQ(ierr); } if (eps->extraction) { ierr = PetscInfo(eps,"Warning: extraction type ignored\n");CHKERRQ(ierr); } ierr = EPSAllocateSolution(eps,0);CHKERRQ(ierr); /* attempt to get dense representations of A and B separately */ ierr = PetscObjectTypeCompare((PetscObject)eps->st,STSHIFT,&isshift);CHKERRQ(ierr); if (isshift) { ierr = STGetNumMatrices(eps->st,&nmat);CHKERRQ(ierr); ierr = STGetOperators(eps->st,0,&A);CHKERRQ(ierr); if (nmat>1) { ierr = STGetOperators(eps->st,1,&B);CHKERRQ(ierr); } PetscPushErrorHandler(PetscIgnoreErrorHandler,NULL); ierra = SlepcMatConvertSeqDense(A,&Adense);CHKERRQ(ierr); if (eps->isgeneralized) { ierrb = SlepcMatConvertSeqDense(B,&Bdense);CHKERRQ(ierr); } else { ierrb = 0; } PetscPopErrorHandler(); denseok = (ierra == 0 && ierrb == 0)? PETSC_TRUE: PETSC_FALSE; } else Adense = NULL; /* setup DS */ if (denseok) { if (eps->isgeneralized) { if (eps->ishermitian) { if (eps->ispositive) { ierr = DSSetType(eps->ds,DSGHEP);CHKERRQ(ierr); } else { ierr = DSSetType(eps->ds,DSGNHEP);CHKERRQ(ierr); /* TODO: should be DSGHIEP */ } } else { ierr = DSSetType(eps->ds,DSGNHEP);CHKERRQ(ierr); } } else { if (eps->ishermitian) { ierr = DSSetType(eps->ds,DSHEP);CHKERRQ(ierr); } else { ierr = DSSetType(eps->ds,DSNHEP);CHKERRQ(ierr); } } } else { ierr = DSSetType(eps->ds,DSNHEP);CHKERRQ(ierr); } ierr = DSAllocate(eps->ds,eps->ncv);CHKERRQ(ierr); ierr = DSGetLeadingDimension(eps->ds,&ld);CHKERRQ(ierr); ierr = DSSetDimensions(eps->ds,eps->ncv,0,0,0);CHKERRQ(ierr); if (denseok) { ierr = STGetShift(eps->st,&shift);CHKERRQ(ierr); if (shift != 0.0) { ierr = MatShift(Adense,shift);CHKERRQ(ierr); } /* use dummy pc and ksp to avoid problems when B is not positive definite */ ierr = STGetKSP(eps->st,&ksp);CHKERRQ(ierr); ierr = KSPSetType(ksp,KSPPREONLY);CHKERRQ(ierr); ierr = KSPGetPC(ksp,&pc);CHKERRQ(ierr); ierr = PCSetType(pc,PCNONE);CHKERRQ(ierr); } else { ierr = PetscInfo(eps,"Using slow explicit operator\n");CHKERRQ(ierr); ierr = STComputeExplicitOperator(eps->st,&OP);CHKERRQ(ierr); ierr = MatDestroy(&Adense);CHKERRQ(ierr); ierr = SlepcMatConvertSeqDense(OP,&Adense);CHKERRQ(ierr); } /* fill DS matrices */ ierr = VecCreateSeqWithArray(PETSC_COMM_SELF,1,ld,NULL,&v);CHKERRQ(ierr); ierr = DSGetArray(eps->ds,DS_MAT_A,&Ap);CHKERRQ(ierr); for (i=0;i<ld;i++) { ierr = VecPlaceArray(v,Ap+i*ld);CHKERRQ(ierr); ierr = MatGetColumnVector(Adense,v,i);CHKERRQ(ierr); ierr = VecResetArray(v);CHKERRQ(ierr); } ierr = DSRestoreArray(eps->ds,DS_MAT_A,&Ap);CHKERRQ(ierr); if (denseok && eps->isgeneralized) { ierr = DSGetArray(eps->ds,DS_MAT_B,&Bp);CHKERRQ(ierr); for (i=0;i<ld;i++) { ierr = VecPlaceArray(v,Bp+i*ld);CHKERRQ(ierr); ierr = MatGetColumnVector(Bdense,v,i);CHKERRQ(ierr); ierr = VecResetArray(v);CHKERRQ(ierr); } ierr = DSRestoreArray(eps->ds,DS_MAT_B,&Bp);CHKERRQ(ierr); } ierr = VecDestroy(&v);CHKERRQ(ierr); ierr = MatDestroy(&Adense);CHKERRQ(ierr); if (!denseok) { ierr = MatDestroy(&OP);CHKERRQ(ierr); } if (denseok && eps->isgeneralized) { ierr = MatDestroy(&Bdense);CHKERRQ(ierr); } PetscFunctionReturn(0); }
PetscErrorCode EPSSetUp_KrylovSchur(EPS eps) { PetscErrorCode ierr; EPS_KRYLOVSCHUR *ctx = (EPS_KRYLOVSCHUR*)eps->data; enum { EPS_KS_DEFAULT,EPS_KS_SYMM,EPS_KS_SLICE,EPS_KS_INDEF } variant; PetscFunctionBegin; /* spectrum slicing requires special treatment of default values */ if (eps->which==EPS_ALL) { ierr = EPSSetUp_KrylovSchur_Slice(eps);CHKERRQ(ierr); } else { ierr = EPSSetDimensions_Default(eps,eps->nev,&eps->ncv,&eps->mpd);CHKERRQ(ierr); if (eps->ncv>eps->nev+eps->mpd) SETERRQ(PetscObjectComm((PetscObject)eps),1,"The value of ncv must not be larger than nev+mpd"); if (!eps->max_it) eps->max_it = PetscMax(100,2*eps->n/eps->ncv); if (!eps->which) { ierr = EPSSetWhichEigenpairs_Default(eps);CHKERRQ(ierr); } } if (eps->isgeneralized && eps->ishermitian && !eps->ispositive && eps->arbitrary) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Arbitrary selection of eigenpairs not implemented for indefinite problems"); if (eps->ishermitian && eps->ispositive && (eps->which==EPS_LARGEST_IMAGINARY || eps->which==EPS_SMALLEST_IMAGINARY)) SETERRQ(PetscObjectComm((PetscObject)eps),1,"Wrong value of eps->which"); if (!eps->extraction) { ierr = EPSSetExtraction(eps,EPS_RITZ);CHKERRQ(ierr); } else if (eps->extraction!=EPS_RITZ && eps->extraction!=EPS_HARMONIC) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Unsupported extraction type"); if (!ctx->keep) ctx->keep = 0.5; ierr = EPSAllocateSolution(eps,1);CHKERRQ(ierr); ierr = EPS_SetInnerProduct(eps);CHKERRQ(ierr); if (eps->arbitrary) { ierr = EPSSetWorkVecs(eps,2);CHKERRQ(ierr); } else if (eps->ishermitian && !eps->ispositive){ ierr = EPSSetWorkVecs(eps,1);CHKERRQ(ierr); } /* dispatch solve method */ if (eps->ishermitian) { if (eps->which==EPS_ALL) { if (eps->isgeneralized && !eps->ispositive) SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Spectrum slicing not implemented for indefinite problems"); else variant = EPS_KS_SLICE; } else if (eps->isgeneralized && !eps->ispositive) { variant = EPS_KS_INDEF; } else { switch (eps->extraction) { case EPS_RITZ: variant = EPS_KS_SYMM; break; case EPS_HARMONIC: variant = EPS_KS_DEFAULT; break; default: SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Unsupported extraction type"); } } } else { switch (eps->extraction) { case EPS_RITZ: variant = EPS_KS_DEFAULT; break; case EPS_HARMONIC: variant = EPS_KS_DEFAULT; break; default: SETERRQ(PetscObjectComm((PetscObject)eps),PETSC_ERR_SUP,"Unsupported extraction type"); } } switch (variant) { case EPS_KS_DEFAULT: eps->ops->solve = EPSSolve_KrylovSchur_Default; eps->ops->computevectors = EPSComputeVectors_Schur; ierr = DSSetType(eps->ds,DSNHEP);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,eps->ncv+1);CHKERRQ(ierr); break; case EPS_KS_SYMM: eps->ops->solve = EPSSolve_KrylovSchur_Symm; eps->ops->computevectors = EPSComputeVectors_Hermitian; ierr = DSSetType(eps->ds,DSHEP);CHKERRQ(ierr); ierr = DSSetCompact(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSSetExtraRow(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,eps->ncv+1);CHKERRQ(ierr); break; case EPS_KS_SLICE: eps->ops->solve = EPSSolve_KrylovSchur_Slice; eps->ops->computevectors = NULL; ierr = DSSetType(eps->ds,DSHEP);CHKERRQ(ierr); ierr = DSSetCompact(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,ctx->ncv+1);CHKERRQ(ierr); break; case EPS_KS_INDEF: eps->ops->solve = EPSSolve_KrylovSchur_Indefinite; eps->ops->computevectors = EPSComputeVectors_Indefinite; ierr = DSSetType(eps->ds,DSGHIEP);CHKERRQ(ierr); ierr = DSSetCompact(eps->ds,PETSC_TRUE);CHKERRQ(ierr); ierr = DSAllocate(eps->ds,eps->ncv+1);CHKERRQ(ierr); break; default: SETERRQ(PetscObjectComm((PetscObject)eps),1,"Unexpected error"); } PetscFunctionReturn(0); }