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

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Revision 1562 - (hide annotations)
Wed May 21 13:04:40 2008 UTC (11 years, 3 months ago) by gross
File MIME type: text/plain
File size: 9549 byte(s)
The algebraic upwinding with MPI. The case of boundary constraint needs still some attention. 


1 ksteube 1313 /* $Id: Coupler.c 1306 2007-09-18 05:51:09Z ksteube $ */
2    
3     /*******************************************************
4     *
5     * Copyright 2003-2007 by ACceSS MNRF
6     * Copyright 2007 by University of Queensland
7     *
8     * http://esscc.uq.edu.au
9     * Primary Business: Queensland, Australia
10     * Licensed under the Open Software License version 3.0
11     * http://www.opensource.org/licenses/osl-3.0.php
12     *
13 gross 1552 **************************************************************
14     *
15     * Paso: Connector and Coupler organizes the coupling with in a pattern/matrix
16     * across processors
17     *
18     **************************************************************
19     *
20     * Author: gross@access.edu.au
21     *
22     **************************************************************/
23 ksteube 1313
24 gross 1552 #include "Coupler.h"
25 ksteube 1313
26 gross 1552 /*************************************************************
27     *
28     * allocates a Connector
29     *
30     **************************************************************/
31 ksteube 1313
32 gross 1552 Paso_Connector* Paso_Connector_alloc(Paso_SharedComponents* send,
33     Paso_SharedComponents* recv)
34     {
35     Paso_Connector*out=NULL;
36     Paso_resetError();
37     out=MEMALLOC(1,Paso_Connector);
38     if ( send->mpi_info != recv->mpi_info ) {
39     Paso_setError(SYSTEM_ERROR,"Paso_Coupler_alloc: send and recv mpi communicator don't match.");
40     return NULL;
41     }
42 gross 1562 if ( send->local_length != recv->local_length ) {
43     Paso_setError(SYSTEM_ERROR,"Paso_Coupler_alloc: local length of send and recv Paso_SharedComponents must match.");
44     return NULL;
45     }
46    
47 gross 1552 if (!Paso_checkPtr(out)) {
48     out->send=Paso_SharedComponents_getReference(send);
49     out->recv= Paso_SharedComponents_getReference(recv);
50     out->mpi_info = Paso_MPIInfo_getReference(send->mpi_info);
51     out->reference_counter=1;
52     }
53     if (Paso_noError()) {
54     return out;
55     } else {
56     Paso_Connector_free(out);
57     return NULL;
58     }
59     }
60 ksteube 1313
61 gross 1552 /* returns a reference to Connector */
62 ksteube 1313
63 gross 1552 Paso_Connector* Paso_Connector_getReference(Paso_Connector* in) {
64     if (in!=NULL) {
65     ++(in->reference_counter);
66     }
67     return in;
68     }
69    
70     /* deallocates a Connector: */
71 ksteube 1313
72 gross 1552 void Paso_Connector_free(Paso_Connector* in) {
73     if (in!=NULL) {
74     in->reference_counter--;
75     if (in->reference_counter<=0) {
76     Paso_SharedComponents_free(in->send);
77     Paso_SharedComponents_free(in->recv);
78     Paso_MPIInfo_free(in->mpi_info);
79     #ifdef Paso_TRACE
80     printf("Paso_Coupler_dealloc: system matrix pattern as been deallocated.\n");
81     #endif
82     }
83     }
84     }
85 ksteube 1313
86 gross 1552 Paso_Connector* Paso_Connector_copy(Paso_Connector* in) {
87     return Paso_Connector_unroll(in,1);
88     }
89 ksteube 1313
90 gross 1552 Paso_Connector* Paso_Connector_unroll(Paso_Connector* in, index_t block_size) {
91     Paso_SharedComponents *new_send_shcomp=NULL, *new_recv_shcomp=NULL;
92     Paso_Connector *out=NULL;
93     if (Paso_noError()) {
94     if (block_size>1) {
95 gross 1562 new_send_shcomp=Paso_SharedComponents_alloc(in->send->local_length,
96     in->send->numNeighbors,
97 gross 1552 in->send->neighbor,
98     in->send->shared,
99     in->send->offsetInShared,
100     block_size,0,in->mpi_info);
101 ksteube 1313
102 gross 1562 new_recv_shcomp=Paso_SharedComponents_alloc(in->recv->local_length,
103     in->recv->numNeighbors,
104 gross 1552 in->recv->neighbor,
105     in->recv->shared,
106     in->recv->offsetInShared,
107     block_size,0,in->mpi_info);
108     } else {
109     new_send_shcomp=Paso_SharedComponents_getReference(in->send);
110     new_recv_shcomp=Paso_SharedComponents_getReference(in->recv);
111     }
112     if (Paso_noError()) out=Paso_Connector_alloc(new_send_shcomp,new_recv_shcomp);
113     }
114     Paso_SharedComponents_free(new_send_shcomp);
115     Paso_SharedComponents_free(new_recv_shcomp);
116     if (Paso_noError()) {
117     return out;
118     } else {
119     Paso_Connector_free(out);
120     return NULL;
121     }
122     }
123     /*************************************************************
124     *
125     * allocates a Connector
126     *
127     **************************************************************/
128 ksteube 1313
129 gross 1552 Paso_Coupler* Paso_Coupler_alloc(Paso_Connector* connector, dim_t block_size)
130 ksteube 1313 {
131 gross 1552 Paso_MPIInfo *mpi_info = connector->mpi_info;
132 ksteube 1313 Paso_Coupler*out=NULL;
133     Paso_resetError();
134     out=MEMALLOC(1,Paso_Coupler);
135     if (!Paso_checkPtr(out)) {
136 gross 1562 out->data=NULL;
137 gross 1552 out->block_size=block_size;
138     out->connector=Paso_Connector_getReference(connector);
139 ksteube 1313 out->send_buffer=NULL;
140     out->recv_buffer=NULL;
141     out->mpi_requests=NULL;
142     out->mpi_stati=NULL;
143 gross 1552 out->mpi_info = Paso_MPIInfo_getReference(mpi_info);
144 ksteube 1313 out->reference_counter=1;
145    
146     #ifdef PASO_MPI
147 gross 1552 out->mpi_requests=MEMALLOC(connector->send->numNeighbors+connector->recv->numNeighbors,MPI_Request);
148     out->mpi_stati=MEMALLOC(connector->send->numNeighbors+connector->recv->numNeighbors,MPI_Status);
149 ksteube 1313 Paso_checkPtr(out->mpi_requests);
150     Paso_checkPtr(out->mpi_stati);
151     #endif
152 gross 1552 if (mpi_info->size>1) {
153     out->send_buffer=MEMALLOC(connector->send->numSharedComponents * block_size,double);
154     out->recv_buffer=MEMALLOC(connector->recv->numSharedComponents * block_size,double);
155     Paso_checkPtr(out->send_buffer);
156     Paso_checkPtr(out->recv_buffer);
157     }
158 ksteube 1313 }
159     if (Paso_noError()) {
160     return out;
161     } else {
162     Paso_Coupler_free(out);
163     return NULL;
164     }
165     }
166    
167 gross 1552 /* returns a reference to Coupler */
168 ksteube 1313
169     Paso_Coupler* Paso_Coupler_getReference(Paso_Coupler* in) {
170     if (in!=NULL) {
171     ++(in->reference_counter);
172     }
173     return in;
174     }
175    
176     /* deallocates a Coupler: */
177    
178     void Paso_Coupler_free(Paso_Coupler* in) {
179     if (in!=NULL) {
180     in->reference_counter--;
181     if (in->reference_counter<=0) {
182 gross 1552 Paso_Connector_free(in->connector);
183 ksteube 1313 MEMFREE(in->send_buffer);
184     MEMFREE(in->recv_buffer);
185     MEMFREE(in->mpi_requests);
186     MEMFREE(in->mpi_stati);
187     Paso_MPIInfo_free(in->mpi_info);
188     MEMFREE(in);
189     #ifdef Paso_TRACE
190     printf("Paso_Coupler_dealloc: system matrix pattern as been deallocated.\n");
191     #endif
192     }
193     }
194     }
195    
196    
197 gross 1562 void Paso_Coupler_startCollect(Paso_Coupler* coupler,double* in)
198 ksteube 1313 {
199     Paso_MPIInfo *mpi_info = coupler->mpi_info;
200     dim_t block_size=coupler->block_size;
201     size_t block_size_size=block_size*sizeof(double);
202     dim_t i,j;
203 gross 1562 coupler->data=in;
204 ksteube 1313 if ( mpi_info->size>1) {
205     /* start reveiving input */
206     {
207 gross 1552 for (i=0; i< coupler->connector->recv->numNeighbors; ++i) {
208 ksteube 1313 #ifdef PASO_MPI
209 gross 1552 MPI_Irecv(&(coupler->recv_buffer[coupler->connector->recv->offsetInShared[i] * block_size]),
210     (coupler->connector->recv->offsetInShared[i+1]- coupler->connector->recv->offsetInShared[i])*block_size,
211 ksteube 1313 MPI_DOUBLE,
212 gross 1552 coupler->connector->recv->neighbor[i],
213 gross 1553 mpi_info->msg_tag_counter+coupler->connector->recv->neighbor[i],
214 ksteube 1313 mpi_info->comm,
215     &(coupler->mpi_requests[i]));
216     #endif
217    
218     }
219     }
220     /* collect values into buffer */
221 gross 1374 #pragma omp parallel for private(i)
222 gross 1552 for (i=0; i < coupler->connector->send->numSharedComponents;++i) {
223     memcpy(&(coupler->send_buffer[(block_size)*i]),&(in[ block_size * coupler->connector->send->shared[i]]), block_size_size);
224 ksteube 1313 }
225     /* send buffer out */
226     {
227 gross 1552 for (i=0; i< coupler->connector->send->numNeighbors; ++i) {
228 ksteube 1313 #ifdef PASO_MPI
229 gross 1553 MPI_Issend(&(coupler->send_buffer[coupler->connector->send->offsetInShared[i] * block_size]),
230 gross 1552 (coupler->connector->send->offsetInShared[i+1]- coupler->connector->send->offsetInShared[i])*block_size,
231 ksteube 1313 MPI_DOUBLE,
232 gross 1552 coupler->connector->send->neighbor[i],
233 ksteube 1313 mpi_info->msg_tag_counter+mpi_info->rank,
234     mpi_info->comm,
235 gross 1553 &(coupler->mpi_requests[i+ coupler->connector->recv->numNeighbors]));
236 ksteube 1313 #endif
237     }
238     }
239 gross 1413 mpi_info->msg_tag_counter+=mpi_info->size;
240 ksteube 1313 }
241     }
242    
243     double* Paso_Coupler_finishCollect(Paso_Coupler* coupler)
244     {
245     Paso_MPIInfo *mpi_info = coupler->mpi_info;
246     if ( mpi_info->size>1) {
247     /* wait for receive */
248     #ifdef PASO_MPI
249 gross 1552 MPI_Waitall(coupler->connector->recv->numNeighbors+coupler->connector->send->numNeighbors,
250 ksteube 1313 coupler->mpi_requests,
251     coupler->mpi_stati);
252     #endif
253     }
254     return coupler->recv_buffer;
255     }
256 gross 1562 dim_t Paso_Coupler_getLocalLength(const Paso_Coupler* in) {
257     return in->connector->send->local_length;
258    
259     }
260     void Paso_Coupler_copyAll(const Paso_Coupler* src, Paso_Coupler* target)
261     {
262     dim_t i;
263     #pragma omp parallel
264     {
265     #pragma omp for private(i)
266     for (i =0; i< src->connector->recv->numSharedComponents * src->block_size; ++i) {
267     target->recv_buffer[i]=src->recv_buffer[i];
268     }
269     #pragma omp for private(i)
270     for (i =0; i< Paso_Coupler_getLocalLength(src) * src->block_size; ++i) {
271     target->data[i]=src->data[i];
272     }
273     }
274     }

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