/[escript]/trunk/paso/src/SystemMatrix.c
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Contents of /trunk/paso/src/SystemMatrix.c

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Revision 3193 - (show annotations)
Tue Sep 21 06:56:44 2010 UTC (9 years ago) by gross
File MIME type: text/plain
File size: 12276 byte(s)
more clean up in AMG
1
2 /*******************************************************
3 *
4 * Copyright (c) 2003-2010 by University of Queensland
5 * Earth Systems Science Computational Center (ESSCC)
6 * http://www.uq.edu.au/esscc
7 *
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
17 /* Paso: SystemMatrix */
18
19 /**************************************************************/
20
21 /* Author: Lutz Gross, l.gross@uq.edu.au */
22
23 /**************************************************************/
24
25 #include "SystemMatrix.h"
26 #include "Preconditioner.h"
27
28 /**************************************************************/
29
30 /* allocates a SystemMatrix of type type using the given matrix pattern
31 Values are initialized by zero.
32 if patternIsUnrolled and type & MATRIX_FORMAT_BLK1, it is assumed that the pattern is allready unrolled to match the requested block size
33 and offsets otherwise unrolling and offset adjustment will be performed.
34 */
35
36 Paso_SystemMatrix* Paso_SystemMatrix_alloc(Paso_SystemMatrixType type,Paso_SystemMatrixPattern *pattern, int row_block_size, int col_block_size,
37 const bool_t patternIsUnrolled) {
38
39 Paso_SystemMatrix*out=NULL;
40 dim_t n_norm,i;
41 Paso_SystemMatrixType pattern_format_out;
42 bool_t unroll=FALSE;
43
44 pattern_format_out= (type & MATRIX_FORMAT_OFFSET1)? PATTERN_FORMAT_OFFSET1: PATTERN_FORMAT_DEFAULT;
45 Paso_resetError();
46 if (type & MATRIX_FORMAT_SYM) {
47 Paso_setError(TYPE_ERROR,"Paso_SystemMatrix_alloc: Symmetric matrix patterns are not supported.");
48 return NULL;
49 }
50 if (patternIsUnrolled) {
51 if ( ! XNOR(type & MATRIX_FORMAT_OFFSET1, pattern->type & PATTERN_FORMAT_OFFSET1) ) {
52 Paso_setError(TYPE_ERROR,"Paso_SystemMatrix_alloc: requested offset and pattern offset does not match.");
53 return NULL;
54 }
55 }
56 /* do we need to apply unrolling ? */
57 unroll
58 /* we don't like non-square blocks */
59 = (row_block_size!=col_block_size)
60 /* or any block size bigger than 3 */
61 || (col_block_size>3)
62 /* or if lock size one requested and the block size is not 1 */
63 || ((type & MATRIX_FORMAT_BLK1) && (col_block_size>1) )
64 /* or the offsets are wrong */
65 || ((type & MATRIX_FORMAT_OFFSET1) != ( pattern->type & PATTERN_FORMAT_OFFSET1));
66
67 out=MEMALLOC(1,Paso_SystemMatrix);
68 if (! Paso_checkPtr(out)) {
69 out->type=type;
70 out->pattern=NULL;
71 out->row_distribution=NULL;
72 out->col_distribution=NULL;
73 out->mpi_info=Paso_MPIInfo_getReference(pattern->mpi_info);
74 out->row_coupler=NULL;
75 out->col_coupler=NULL;
76 out->mainBlock=NULL;
77 out->row_coupleBlock=NULL;
78 out->col_coupleBlock=NULL;
79 out->normalizer_is_valid=FALSE;
80 out->normalizer=NULL;
81 out->solver_package=PASO_PASO;
82 out->solver=NULL;
83 out->trilinos_data=NULL;
84 out->reference_counter=1;
85 out->logical_row_block_size=row_block_size;
86 out->logical_col_block_size=col_block_size;
87
88
89 if (type & MATRIX_FORMAT_CSC) {
90 if (unroll) {
91 if (patternIsUnrolled) {
92 out->pattern=Paso_SystemMatrixPattern_getReference(pattern);
93 } else {
94 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,col_block_size,row_block_size);
95 }
96 out->row_block_size=1;
97 out->col_block_size=1;
98 } else {
99 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,1,1);
100 out->row_block_size=row_block_size;
101 out->col_block_size=col_block_size;
102 }
103 if (Paso_noError()) {
104 out->row_distribution=Paso_Distribution_getReference(out->pattern->input_distribution);
105 out->col_distribution=Paso_Distribution_getReference(out->pattern->output_distribution);
106 }
107 } else {
108 if (unroll) {
109 if (patternIsUnrolled) {
110 out->pattern=Paso_SystemMatrixPattern_getReference(pattern);
111 } else {
112 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,row_block_size,col_block_size);
113 }
114 out->row_block_size=1;
115 out->col_block_size=1;
116 } else {
117 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,1,1);
118 out->row_block_size=row_block_size;
119 out->col_block_size=col_block_size;
120 }
121 if (Paso_noError()) {
122 out->row_distribution=Paso_Distribution_getReference(out->pattern->output_distribution);
123 out->col_distribution=Paso_Distribution_getReference(out->pattern->input_distribution);
124 }
125 }
126 if (Paso_noError()) {
127 out->block_size=out->row_block_size*out->col_block_size;
128 out->col_coupler=Paso_Coupler_alloc(pattern->col_connector,out->col_block_size);
129 out->row_coupler=Paso_Coupler_alloc(pattern->row_connector,out->row_block_size);
130 /* this should be bypassed if trilinos is used */
131 if (type & MATRIX_FORMAT_TRILINOS_CRS) {
132 #ifdef TRILINOS
133 out->trilinos_data=Paso_TRILINOS_alloc();
134 #endif
135 } else {
136 out->solver_package=PASO_PASO;
137 out->mainBlock=Paso_SparseMatrix_alloc(type,out->pattern->mainPattern,row_block_size,col_block_size,TRUE);
138 out->col_coupleBlock=Paso_SparseMatrix_alloc(type,out->pattern->col_couplePattern,row_block_size,col_block_size,TRUE);
139 out->row_coupleBlock=Paso_SparseMatrix_alloc(type,out->pattern->row_couplePattern,row_block_size,col_block_size,TRUE);
140 if (Paso_noError()) {
141 /* allocate memory for matrix entries */
142 if (type & MATRIX_FORMAT_CSC) {
143 n_norm = out->mainBlock->numCols * out->col_block_size;
144 } else {
145 n_norm = out->mainBlock->numRows * out->row_block_size;
146 }
147 out->normalizer=MEMALLOC(n_norm,double);
148 out->normalizer_is_valid=FALSE;
149 if (! Paso_checkPtr(out->normalizer)) {
150 #pragma omp parallel for private(i) schedule(static)
151 for (i=0;i<n_norm;++i) out->normalizer[i]=0.;
152 }
153 }
154 }
155 }
156 }
157 /* all done: */
158 if (! Paso_noError()) {
159 Paso_SystemMatrix_free(out);
160 return NULL;
161 } else {
162 return out;
163 }
164 }
165
166 /* returns a reference to Paso_SystemMatrix in */
167
168 Paso_SystemMatrix* Paso_SystemMatrix_getReference(Paso_SystemMatrix* in) {
169 if (in!=NULL) ++(in->reference_counter);
170 return in;
171 }
172
173 /* deallocates a SystemMatrix: */
174
175 void Paso_SystemMatrix_free(Paso_SystemMatrix* in) {
176 if (in!=NULL) {
177 in->reference_counter--;
178 if (in->reference_counter<=0) {
179 Paso_SystemMatrixPattern_free(in->pattern);
180 Paso_Distribution_free(in->row_distribution);
181 Paso_Distribution_free(in->col_distribution);
182 Paso_MPIInfo_free(in->mpi_info);
183 Paso_Coupler_free(in->row_coupler);
184 Paso_Coupler_free(in->col_coupler);
185 Paso_SparseMatrix_free(in->mainBlock);
186 Paso_SparseMatrix_free(in->col_coupleBlock);
187 Paso_SparseMatrix_free(in->row_coupleBlock);
188 MEMFREE(in->normalizer);
189 Paso_solve_free(in);
190 #ifdef TRILINOS
191 Paso_TRILINOS_free(in->trilinos_data);
192 #endif
193 MEMFREE(in);
194 #ifdef Paso_TRACE
195 printf("Paso_SystemMatrix_free: system matrix as been deallocated.\n");
196 #endif
197 }
198 }
199 }
200 void Paso_SystemMatrix_startCollect(Paso_SystemMatrix* A,const double* in)
201 {
202 Paso_SystemMatrix_startColCollect(A,in);
203 }
204 double* Paso_SystemMatrix_finishCollect(Paso_SystemMatrix* A)
205 {
206 return Paso_SystemMatrix_finishColCollect(A);
207 }
208
209 void Paso_SystemMatrix_startColCollect(Paso_SystemMatrix* A,const double* in)
210 {
211 Paso_Coupler_startCollect(A->col_coupler, in);
212 }
213 double* Paso_SystemMatrix_finishColCollect(Paso_SystemMatrix* A)
214 {
215 Paso_Coupler_finishCollect(A->col_coupler);
216 return A->col_coupler->recv_buffer;
217 }
218 void Paso_SystemMatrix_startRowCollect(Paso_SystemMatrix* A,const double* in)
219 {
220 Paso_Coupler_startCollect(A->row_coupler, in);
221 }
222 double* Paso_SystemMatrix_finishRowCollect(Paso_SystemMatrix* A)
223 {
224 Paso_Coupler_finishCollect(A->row_coupler);
225 return A->row_coupler->recv_buffer;
226 }
227
228 dim_t Paso_SystemMatrix_getTotalNumRows(const Paso_SystemMatrix* A){
229 return A->mainBlock->numRows * A->row_block_size;
230 }
231
232 dim_t Paso_SystemMatrix_getTotalNumCols(const Paso_SystemMatrix* A){
233 return A->mainBlock->numCols * A->col_block_size;
234 }
235 dim_t Paso_SystemMatrix_getGlobalNumRows(Paso_SystemMatrix* A) {
236 if (A->type & MATRIX_FORMAT_CSC) {
237 return Paso_Distribution_getGlobalNumComponents(A->pattern->input_distribution);
238 } else {
239 return Paso_Distribution_getGlobalNumComponents(A->pattern->output_distribution);
240 }
241 }
242 dim_t Paso_SystemMatrix_getGlobalNumCols(Paso_SystemMatrix* A) {
243 if (A->type & MATRIX_FORMAT_CSC) {
244 return Paso_Distribution_getGlobalNumComponents(A->pattern->output_distribution);
245 } else {
246 return Paso_Distribution_getGlobalNumComponents(A->pattern->input_distribution);
247 }
248
249 }
250 dim_t Paso_SystemMatrix_getNumOutput(Paso_SystemMatrix* A) {
251 return Paso_SystemMatrixPattern_getNumOutput(A->pattern);
252 }
253
254 index_t* Paso_SystemMatrix_borrowMainDiagonalPointer(Paso_SystemMatrix * A_p)
255 {
256 index_t* out=NULL;
257 int fail=0;
258 out=Paso_SparseMatrix_borrowMainDiagonalPointer(A_p->mainBlock);
259 if (out==NULL) fail=1;
260 #ifdef PASO_MPI
261 {
262 int fail_loc = fail;
263 MPI_Allreduce(&fail_loc, &fail, 1, MPI_INT, MPI_MAX, A_p->mpi_info->comm);
264 }
265 #endif
266 if (fail>0) Paso_setError(VALUE_ERROR, "Paso_SystemMatrix_borrowMainDiagonalPointer: no main diagonal");
267 return out;
268 }
269
270 void Paso_SystemMatrix_makeZeroRowSums(Paso_SystemMatrix * A_p, double* left_over)
271 {
272 index_t ir, ib, irow;
273 register double rtmp1, rtmp2;
274 const dim_t n = Paso_SystemMatrixPattern_getNumOutput(A_p->pattern);
275 const dim_t nblk = A_p->block_size;
276 const dim_t blk = A_p->row_block_size;
277 const index_t* main_ptr=Paso_SystemMatrix_borrowMainDiagonalPointer(A_p);
278
279
280 Paso_SystemMatrix_rowSum(A_p, left_over); /* left_over now hold the row sum */
281
282 #pragma omp parallel for private(ir,ib, rtmp1, rtmp2) schedule(static)
283 for (ir=0;ir< n;ir++) {
284 for (ib=0;ib<blk; ib++) {
285 irow=ib+blk*ir;
286 rtmp1=left_over[irow];
287 rtmp2=A_p->mainBlock->val[main_ptr[ir]*nblk+ib+blk*ib];
288 A_p->mainBlock->val[main_ptr[ir]*nblk+ib+blk*ib] = -rtmp1;
289 left_over[irow]=rtmp2+rtmp1;
290 }
291 }
292 }
293 void Paso_SystemMatrix_copyBlockFromMainDiagonal(Paso_SystemMatrix * A_p, double* out)
294 {
295 Paso_SparseMatrix_copyBlockFromMainDiagonal(A_p->mainBlock, out);
296 return;
297 }
298 void Paso_SystemMatrix_copyBlockToMainDiagonal(Paso_SystemMatrix * A_p, const double* in)
299 {
300 Paso_SparseMatrix_copyBlockToMainDiagonal(A_p->mainBlock, in);
301 return;
302 }
303 void Paso_SystemMatrix_copyFromMainDiagonal(Paso_SystemMatrix * A_p, double* out)
304 {
305 Paso_SparseMatrix_copyFromMainDiagonal(A_p->mainBlock, out);
306 return;
307 }
308 void Paso_SystemMatrix_copyToMainDiagonal(Paso_SystemMatrix * A_p, const double* in)
309 {
310 Paso_SparseMatrix_copyToMainDiagonal(A_p->mainBlock, in);
311 return;
312 }
313
314 void Paso_SystemMatrix_setPreconditioner(Paso_SystemMatrix* A,Paso_Options* options) {
315 if (A->solver==NULL) {
316 A->solver=Paso_Preconditioner_alloc(A,options);
317 }
318 }
319
320 /* applies the preconditioner */
321 /* has to be called within a parallel reqion */
322 /* barrier synchronization is performed before the evaluation to make sure that the input vector is available */
323 void Paso_SystemMatrix_solvePreconditioner(Paso_SystemMatrix* A,double* x,double* b){
324 Paso_Preconditioner* prec=(Paso_Preconditioner*) A->solver;
325 Paso_Preconditioner_solve(prec, A,x,b);
326 }
327 void Paso_SystemMatrix_freePreconditioner(Paso_SystemMatrix* A) {
328 Paso_Preconditioner* prec=NULL;
329 if (A!=NULL) {
330 prec=(Paso_Preconditioner*) A->solver;
331 Paso_Preconditioner_free(prec);
332 A->solver=NULL;
333 }
334 }

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