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

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Revision 3193 - (hide 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 ksteube 1312
2     /*******************************************************
3 ksteube 1811 *
4 jfenwick 2881 * Copyright (c) 2003-2010 by University of Queensland
5 ksteube 1811 * 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 dhawcroft 631
14 ksteube 1811
15 jgs 150 /**************************************************************/
16    
17     /* Paso: SystemMatrix */
18    
19     /**************************************************************/
20    
21 jfenwick 2608 /* Author: Lutz Gross, l.gross@uq.edu.au */
22 jgs 150
23     /**************************************************************/
24    
25     #include "SystemMatrix.h"
26 gross 3120 #include "Preconditioner.h"
27 jgs 150
28     /**************************************************************/
29    
30     /* allocates a SystemMatrix of type type using the given matrix pattern
31 gross 2551 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 jgs 150
36 gross 2551 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 gross 432
39 jgs 150 Paso_SystemMatrix*out=NULL;
40 gross 1028 dim_t n_norm,i;
41 ksteube 1312 Paso_SystemMatrixType pattern_format_out;
42 gross 2551 bool_t unroll=FALSE;
43 gross 1028
44 gross 2551 pattern_format_out= (type & MATRIX_FORMAT_OFFSET1)? PATTERN_FORMAT_OFFSET1: PATTERN_FORMAT_DEFAULT;
45 jgs 150 Paso_resetError();
46 gross 2551 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 gross 2554 if ( ! XNOR(type & MATRIX_FORMAT_OFFSET1, pattern->type & PATTERN_FORMAT_OFFSET1) ) {
52 gross 2551 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 gross 2554 || ((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 gross 2551
67 jgs 150 out=MEMALLOC(1,Paso_SystemMatrix);
68     if (! Paso_checkPtr(out)) {
69 ksteube 1312 out->type=type;
70 jgs 150 out->pattern=NULL;
71 ksteube 1312 out->row_distribution=NULL;
72     out->col_distribution=NULL;
73     out->mpi_info=Paso_MPIInfo_getReference(pattern->mpi_info);
74 gross 1552 out->row_coupler=NULL;
75     out->col_coupler=NULL;
76 ksteube 1312 out->mainBlock=NULL;
77 gross 1552 out->row_coupleBlock=NULL;
78     out->col_coupleBlock=NULL;
79 ksteube 1312 out->normalizer_is_valid=FALSE;
80     out->normalizer=NULL;
81 gross 425 out->solver_package=PASO_PASO;
82     out->solver=NULL;
83 ksteube 1312 out->trilinos_data=NULL;
84 jgs 150 out->reference_counter=1;
85 gross 2551 out->logical_row_block_size=row_block_size;
86     out->logical_col_block_size=col_block_size;
87 ksteube 1312
88 gross 1552
89 gross 415 if (type & MATRIX_FORMAT_CSC) {
90 gross 2551 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 ksteube 1312 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,1,1);
100 jgs 150 out->row_block_size=row_block_size;
101     out->col_block_size=col_block_size;
102 gross 2551 }
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 gross 415 } else {
108 gross 2551 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 gross 415 out->row_block_size=1;
115     out->col_block_size=1;
116 gross 2551 } else {
117 ksteube 1312 out->pattern=Paso_SystemMatrixPattern_unrollBlocks(pattern,pattern_format_out,1,1);
118 gross 415 out->row_block_size=row_block_size;
119     out->col_block_size=col_block_size;
120 gross 2551 }
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 gross 415 }
154     }
155 jgs 150 }
156     }
157     /* all done: */
158     if (! Paso_noError()) {
159 ksteube 1312 Paso_SystemMatrix_free(out);
160 jgs 150 return NULL;
161     } else {
162     return out;
163     }
164     }
165    
166     /* returns a reference to Paso_SystemMatrix in */
167    
168 gross 2551 Paso_SystemMatrix* Paso_SystemMatrix_getReference(Paso_SystemMatrix* in) {
169 jgs 150 if (in!=NULL) ++(in->reference_counter);
170 gross 1792 return in;
171 jgs 150 }
172    
173     /* deallocates a SystemMatrix: */
174    
175 ksteube 1312 void Paso_SystemMatrix_free(Paso_SystemMatrix* in) {
176 jgs 150 if (in!=NULL) {
177     in->reference_counter--;
178     if (in->reference_counter<=0) {
179 ksteube 1312 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 gross 1552 Paso_Coupler_free(in->row_coupler);
184     Paso_Coupler_free(in->col_coupler);
185 ksteube 1312 Paso_SparseMatrix_free(in->mainBlock);
186 gross 1552 Paso_SparseMatrix_free(in->col_coupleBlock);
187     Paso_SparseMatrix_free(in->row_coupleBlock);
188 jgs 150 MEMFREE(in->normalizer);
189     Paso_solve_free(in);
190 ksteube 1312 #ifdef TRILINOS
191     Paso_TRILINOS_free(in->trilinos_data);
192     #endif
193 jgs 150 MEMFREE(in);
194     #ifdef Paso_TRACE
195 ksteube 1312 printf("Paso_SystemMatrix_free: system matrix as been deallocated.\n");
196 jgs 150 #endif
197     }
198     }
199     }
200 gross 1639 void Paso_SystemMatrix_startCollect(Paso_SystemMatrix* A,const double* in)
201 ksteube 1312 {
202 gross 1552 Paso_SystemMatrix_startColCollect(A,in);
203 ksteube 1312 }
204     double* Paso_SystemMatrix_finishCollect(Paso_SystemMatrix* A)
205     {
206 gross 1552 return Paso_SystemMatrix_finishColCollect(A);
207 ksteube 1312 }
208    
209 gross 1639 void Paso_SystemMatrix_startColCollect(Paso_SystemMatrix* A,const double* in)
210 gross 1552 {
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 gross 1639 void Paso_SystemMatrix_startRowCollect(Paso_SystemMatrix* A,const double* in)
219 gross 1552 {
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 gross 1407 dim_t Paso_SystemMatrix_getTotalNumRows(const Paso_SystemMatrix* A){
229 ksteube 1312 return A->mainBlock->numRows * A->row_block_size;
230     }
231    
232 gross 1407 dim_t Paso_SystemMatrix_getTotalNumCols(const Paso_SystemMatrix* A){
233 ksteube 1312 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 gross 1361 dim_t Paso_SystemMatrix_getNumOutput(Paso_SystemMatrix* A) {
251     return Paso_SystemMatrixPattern_getNumOutput(A->pattern);
252     }
253 ksteube 1312
254 gross 3005 index_t* Paso_SystemMatrix_borrowMainDiagonalPointer(Paso_SystemMatrix * A_p)
255     {
256 gross 3008 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 gross 3005 }
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 gross 3120 }
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 gross 3193 Paso_Preconditioner* prec=(Paso_Preconditioner*) A->solver;
325 gross 3120 Paso_Preconditioner_solve(prec, A,x,b);
326     }
327     void Paso_SystemMatrix_freePreconditioner(Paso_SystemMatrix* A) {
328 gross 3193 Paso_Preconditioner* prec=NULL;
329 gross 3120 if (A!=NULL) {
330 gross 3193 prec=(Paso_Preconditioner*) A->solver;
331 gross 3120 Paso_Preconditioner_free(prec);
332     A->solver=NULL;
333     }
334 gross 3005 }

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