1 #define PETSCMAT_DLL 2 3 /* 4 Provides an interface to the IBM RS6000 Essl sparse solver 5 6 */ 7 #include "src/mat/impls/aij/seq/aij.h" 8 9 /* #include <essl.h> This doesn't work! */ 10 11 EXTERN_C_BEGIN 12 void dgss(int*,int*,double*,int*,int*,int*,double*,double*,int*); 13 void dgsf(int*,int*,int*,double*,int*,int*,int*,int*,double*,double*,double*,int*); 14 EXTERN_C_END 15 16 typedef struct { 17 int n,nz; 18 PetscScalar *a; 19 int *ia; 20 int *ja; 21 int lna; 22 int iparm[5]; 23 PetscReal rparm[5]; 24 PetscReal oparm[5]; 25 PetscScalar *aux; 26 int naux; 27 28 PetscTruth CleanUpESSL; 29 } Mat_Essl; 30 31 #undef __FUNCT__ 32 #define __FUNCT__ "MatDestroy_Essl" 33 PetscErrorCode MatDestroy_Essl(Mat A) 34 { 35 PetscErrorCode ierr; 36 Mat_Essl *essl=(Mat_Essl*)A->spptr; 37 38 PetscFunctionBegin; 39 if (essl->CleanUpESSL) { 40 ierr = PetscFree(essl->a);CHKERRQ(ierr); 41 } 42 ierr = PetscFree(essl);CHKERRQ(ierr); 43 ierr = MatDestroy_SeqAIJ(A);CHKERRQ(ierr); 44 PetscFunctionReturn(0); 45 } 46 47 #undef __FUNCT__ 48 #define __FUNCT__ "MatSolve_Essl" 49 PetscErrorCode MatSolve_Essl(Mat A,Vec b,Vec x) 50 { 51 Mat_Essl *essl = (Mat_Essl*)A->spptr; 52 PetscScalar *xx; 53 PetscErrorCode ierr; 54 int m,zero = 0; 55 56 PetscFunctionBegin; 57 ierr = VecGetLocalSize(b,&m);CHKERRQ(ierr); 58 ierr = VecCopy(b,x);CHKERRQ(ierr); 59 ierr = VecGetArray(x,&xx);CHKERRQ(ierr); 60 dgss(&zero,&A->cmap->n,essl->a,essl->ia,essl->ja,&essl->lna,xx,essl->aux,&essl->naux); 61 ierr = VecRestoreArray(x,&xx);CHKERRQ(ierr); 62 PetscFunctionReturn(0); 63 } 64 65 #undef __FUNCT__ 66 #define __FUNCT__ "MatLUFactorNumeric_Essl" 67 PetscErrorCode MatLUFactorNumeric_Essl(Mat F,Mat A,MatFactorInfo *info) 68 { 69 Mat_SeqAIJ *aa=(Mat_SeqAIJ*)(A)->data; 70 Mat_Essl *essl=(Mat_Essl*)(F)->spptr; 71 PetscErrorCode ierr; 72 int i,one = 1; 73 74 PetscFunctionBegin; 75 /* copy matrix data into silly ESSL data structure (1-based Frotran style) */ 76 for (i=0; i<A->rmap->n+1; i++) essl->ia[i] = aa->i[i] + 1; 77 for (i=0; i<aa->nz; i++) essl->ja[i] = aa->j[i] + 1; 78 79 ierr = PetscMemcpy(essl->a,aa->a,(aa->nz)*sizeof(PetscScalar));CHKERRQ(ierr); 80 81 /* set Essl options */ 82 essl->iparm[0] = 1; 83 essl->iparm[1] = 5; 84 essl->iparm[2] = 1; 85 essl->iparm[3] = 0; 86 essl->rparm[0] = 1.e-12; 87 essl->rparm[1] = 1.0; 88 ierr = PetscOptionsGetReal(((PetscObject)A)->prefix,"-matessl_lu_threshold",&essl->rparm[1],PETSC_NULL);CHKERRQ(ierr); 89 90 dgsf(&one,&A->rmap->n,&essl->nz,essl->a,essl->ia,essl->ja,&essl->lna,essl->iparm,essl->rparm,essl->oparm,essl->aux,&essl->naux); 91 92 B->ops->solve = MatSolve_Essl; 93 (F)->assembled = PETSC_TRUE; 94 (F)->preallocated = PETSC_TRUE; 95 PetscFunctionReturn(0); 96 } 97 98 99 100 101 #undef __FUNCT__ 102 #define __FUNCT__ "MatLUFactorSymbolic_Essl" 103 PetscErrorCode MatLUFactorSymbolic_Essl(Mat B,Mat A,IS r,IS c,MatFactorInfo *info) 104 { 105 Mat_SeqAIJ *a = (Mat_SeqAIJ*)A->data; 106 PetscErrorCode ierr; 107 int len; 108 Mat_Essl *essl; 109 PetscReal f = 1.0; 110 111 PetscFunctionBegin; 112 essl = (Mat_Essl *)(B->spptr); 113 114 /* allocate the work arrays required by ESSL */ 115 f = info->fill; 116 essl->nz = a->nz; 117 essl->lna = (int)a->nz*f; 118 essl->naux = 100 + 10*A->rmap->n; 119 120 /* since malloc is slow on IBM we try a single malloc */ 121 len = essl->lna*(2*sizeof(int)+sizeof(PetscScalar)) + essl->naux*sizeof(PetscScalar); 122 ierr = PetscMalloc(len,&essl->a);CHKERRQ(ierr); 123 essl->aux = essl->a + essl->lna; 124 essl->ia = (int*)(essl->aux + essl->naux); 125 essl->ja = essl->ia + essl->lna; 126 essl->CleanUpESSL = PETSC_TRUE; 127 128 ierr = PetscLogObjectMemory(B,len);CHKERRQ(ierr); 129 B->ops->lufactornumeric = MatLUFactorNumeric_Essl; 130 PetscFunctionReturn(0); 131 } 132 133 134 /*MC 135 MATESSL - MATESSL = "essl" - A matrix type providing direct solvers (LU) for sequential matrices 136 via the external package ESSL. 137 138 If ESSL is installed (see the manual for 139 instructions on how to declare the existence of external packages), 140 a matrix type can be constructed which invokes ESSL solvers. 141 After calling MatCreate(...,A), simply call MatSetType(A,MATESSL). 142 This matrix type is only supported for double precision real. 143 144 This matrix inherits from MATSEQAIJ. As a result, MatSeqAIJSetPreallocation is 145 supported for this matrix type. One can also call MatConvert for an inplace conversion to or from 146 the MATSEQAIJ type without data copy. 147 148 Options Database Keys: 149 . -mat_type essl - sets the matrix type to "essl" during a call to MatSetFromOptions() 150 151 Level: beginner 152 153 .seealso: PCLU 154 M*/ 155 156 #undef __FUNCT__ 157 #define __FUNCT__ "MatGetFactor_seqaij_essl" 158 PetscErrorCode MatGetFactor_seqaij_essl(Mat A,MatFactorType ftype,Mat *F) 159 { 160 Mat B; 161 Mat_SeqAIJ *a = (Mat_SeqAIJ*)A->data; 162 PetscErrorCode ierr; 163 Mat_Essl *essl; 164 165 PetscFunctionBegin; 166 if (A->cmap->N != A->rmap->N) SETERRQ(PETSC_ERR_ARG_SIZ,"matrix must be square"); 167 ierr = MatCreate(((PetscObject)A)->comm,&B);CHKERRQ(ierr); 168 ierr = MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,A->rmap->n,A->cmap->n);CHKERRQ(ierr); 169 ierr = MatSetType(B,((PetscObject)A)->type_name);CHKERRQ(ierr); 170 ierr = MatSeqAIJSetPreallocation(B,0,PETSC_NULL);CHKERRQ(ierr); 171 172 ierr = PetscNewLog(B,Mat_Essl,&essl);CHKERRQ(ierr); 173 B->spptr = essl; 174 B->ops->lufactorsymbolic = MatLUFactorSymbolic_Essl; 175 B->factor = MAT_FACTOR_LU; 176 *F = B; 177 PetscFunctionReturn(0); 178 } 179