/[escript]/trunk/paso/src/SolverFCT.c
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Annotation of /trunk/paso/src/SolverFCT.c

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Revision 1552 - (hide annotations)
Thu May 8 08:52:41 2008 UTC (11 years, 9 months ago) by gross
File MIME type: text/plain
File size: 5847 byte(s)
some changes to make the implementatiopn of a upwind MPI version easier
1 gross 1361 /* $Id:$ */
2    
3     /*******************************************************
4     *
5     * Copyright 2007 by University of Queensland
6     *
7     * http://esscc.uq.edu.au
8     * Primary Business: Queensland, Australia
9     * Licensed under the Open Software License version 3.0
10     * http://www.opensource.org/licenses/osl-3.0.php
11     *
12     *******************************************************/
13    
14     /**************************************************************/
15    
16 gross 1362 /* Paso: FCTransportProblem */
17 gross 1361
18     /**************************************************************/
19    
20     /* Author: l.gross@uq.edu.au */
21    
22     /**************************************************************/
23    
24    
25     #include "Paso.h"
26     #include "SolverFCT.h"
27     #include "PasoUtil.h"
28    
29    
30 gross 1362 /**************************************************************/
31 gross 1361
32 gross 1362 /* free all memory used by */
33     void Paso_FCTransportProblem_free(Paso_FCTransportProblem* in) {
34     if (in!=NULL) {
35     in->reference_counter--;
36     if (in->reference_counter<=0) {
37     Paso_SystemMatrix_free(in->transport_matrix);
38 gross 1407 Paso_SystemMatrix_free(in->mass_matrix);
39     Paso_SystemMatrix_free(in->iteration_matrix);
40 gross 1362 Paso_MPIInfo_free(in->mpi_info);
41 gross 1364 MEMFREE(in->u);
42 gross 1407 MEMFREE(in->main_iptr);
43 gross 1362 MEMFREE(in->lumped_mass_matrix);
44 gross 1407 MEMFREE(in->main_diagonal_low_order_transport_matrix);
45 gross 1362 MEMFREE(in);
46     }
47     }
48     }
49 gross 1361
50 gross 1362 Paso_FCTransportProblem* Paso_FCTransportProblem_getReference(Paso_FCTransportProblem* in) {
51 gross 1361 if (in!=NULL) {
52 gross 1362 ++(in->reference_counter);
53 gross 1361 }
54 gross 1367 return in;
55 gross 1362 }
56    
57     Paso_SystemMatrix* Paso_FCTransportProblem_borrowTransportMatrix(Paso_FCTransportProblem* in) {
58     return in->transport_matrix;
59 gross 1361 }
60 gross 1407 Paso_SystemMatrix* Paso_FCTransportProblem_borrowMassMatrix(Paso_FCTransportProblem* in) {
61     return in->mass_matrix;
62 gross 1362 }
63 gross 1361
64 gross 1362 double* Paso_FCTransportProblem_borrowLumpedMassMatrix(Paso_FCTransportProblem* in) {
65     return in->lumped_mass_matrix;
66     }
67 gross 1361
68 gross 1362 dim_t Paso_FCTransportProblem_getTotalNumRows(Paso_FCTransportProblem* in) {
69     return Paso_SystemMatrix_getTotalNumRows(in->transport_matrix);
70     }
71 gross 1361
72 gross 1407 Paso_FCTransportProblem* Paso_FCTransportProblem_alloc(double theta, Paso_SystemMatrixPattern *pattern, int block_size
73 gross 1361
74 gross 1362
75     ) {
76     Paso_SystemMatrixType matrix_type=MATRIX_FORMAT_DEFAULT+MATRIX_FORMAT_BLK1; /* at the moment only block size 1 is supported */
77     Paso_FCTransportProblem* out=NULL;
78     dim_t n,i;
79     index_t iptr,iptr_main,k;
80    
81     if ((theta<0.) || (theta >1.)) {
82     Paso_setError(TYPE_ERROR,"Paso_FCTransportProblem_alloc: theta needs to be between 0. and. 1.");
83 gross 1361 return NULL;
84 gross 1362 }
85 gross 1361
86 gross 1362 out=MEMALLOC(1,Paso_FCTransportProblem);
87     if (Paso_checkPtr(out)) return NULL;
88 gross 1361
89 gross 1407
90 gross 1362 out->theta=theta;
91 gross 1407 out->dt_max=LARGE_POSITIVE_FLOAT;
92 gross 1363 out->valid_matrices=FALSE;
93 gross 1362 out->transport_matrix=Paso_SystemMatrix_alloc(matrix_type,pattern,block_size,block_size);
94 gross 1407 out->mass_matrix=Paso_SystemMatrix_alloc(matrix_type,pattern,block_size,block_size);
95     out->iteration_matrix=NULL;
96    
97 gross 1362 out->mpi_info=Paso_MPIInfo_getReference(pattern->mpi_info);
98 gross 1407 out->u=NULL;
99     out->u_min=0.;
100 gross 1362 out->main_iptr=NULL;
101     out->lumped_mass_matrix=NULL;
102 gross 1407 out->main_diagonal_low_order_transport_matrix=NULL;
103 gross 1361
104 gross 1362 if (Paso_noError()) {
105     n=Paso_SystemMatrix_getTotalNumRows(out->transport_matrix);
106    
107 gross 1407 out->u=MEMALLOC(n,double);
108 gross 1362 out->main_iptr=MEMALLOC(n,index_t);
109     out->lumped_mass_matrix=MEMALLOC(n,double);
110 gross 1407 out->main_diagonal_low_order_transport_matrix=MEMALLOC(n,double);
111 gross 1362
112 gross 1407 if ( ! (Paso_checkPtr(out->u) || Paso_checkPtr(out->main_iptr) ||
113     Paso_checkPtr(out->lumped_mass_matrix) || Paso_checkPtr(out->main_diagonal_low_order_transport_matrix)) ) {
114 gross 1362
115 gross 1367 #pragma omp parallel for schedule(static) private(i)
116     for (i = 0; i < n; ++i) {
117     out->lumped_mass_matrix[i]=0.;
118 gross 1407 out->main_diagonal_low_order_transport_matrix[i]=0.;
119 gross 1367 out->u[i]=0.;
120     }
121 gross 1362 /* identify the main diagonals */
122     #pragma omp parallel for schedule(static) private(i,iptr,iptr_main,k)
123     for (i = 0; i < n; ++i) {
124     iptr_main=pattern->mainPattern->ptr[0]-1;
125     for (iptr=pattern->mainPattern->ptr[i];iptr<pattern->mainPattern->ptr[i+1]; iptr++) {
126     if (pattern->mainPattern->index[iptr]==i) {
127     iptr_main=iptr;
128     break;
129     }
130     }
131     out->main_iptr[i]=iptr_main;
132     if (iptr_main==pattern->mainPattern->ptr[0]-1)
133     Paso_setError(VALUE_ERROR, "Paso_FCTransportProblem_alloc: no main diagonal");
134     }
135    
136     }
137    
138 gross 1361 }
139     if (Paso_noError()) {
140     return out;
141     } else {
142 gross 1362 Paso_FCTransportProblem_free(out);
143 gross 1361 return NULL;
144     }
145     }
146 gross 1364
147     void Paso_FCTransportProblem_checkinSolution(Paso_FCTransportProblem* in, double* u) {
148     dim_t i, n;
149 gross 1407 double local_u_min,u_min;
150 gross 1364
151     n=Paso_FCTransportProblem_getTotalNumRows(in);
152 gross 1407 u_min=LARGE_POSITIVE_FLOAT;
153     #pragma omp parallel private(local_u_min)
154     {
155     local_u_min=0.;
156     #pragma omp for schedule(static) private(i)
157 gross 1410 for (i=0;i<n;++i) local_u_min=MIN(local_u_min,u[i]);
158 gross 1407 #pragma omp critical
159     {
160     u_min=MIN(u_min,local_u_min);
161     }
162 gross 1364 }
163 gross 1407 #ifdef PASO_MPI
164     local_u_min=u_min;
165 ksteube 1415 MPI_Allreduce(&local_u_min,&u_min, 1, MPI_DOUBLE, MPI_MIN, in->mpi_info->comm);
166 gross 1407 #endif
167     in->u_min=u_min;
168 gross 1410 #pragma omp parallel for schedule(static) private(i)
169     for (i=0;i<n;++i) {
170     in->u[i]=u[i]-u_min;
171     }
172 gross 1364 }

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