/[escript]/trunk/finley/src/Mesh_prepare.c
ViewVC logotype

Contents of /trunk/finley/src/Mesh_prepare.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1811 - (show annotations)
Thu Sep 25 23:11:13 2008 UTC (11 years, 2 months ago) by ksteube
File MIME type: text/plain
File size: 6320 byte(s)
Copyright updated in all files

1
2 /*******************************************************
3 *
4 * Copyright (c) 2003-2008 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 /* Finley: Mesh: prepares the mesh for further calculations */
18
19 /**************************************************************/
20
21 #include "Mesh.h"
22
23 /**************************************************************/
24
25 void Finley_Mesh_prepare(Finley_Mesh* in, bool_t optimize) {
26 dim_t newGlobalNumDOFs=0, numReducedNodes=0,i;
27 index_t* distribution=NULL, *maskReducedNodes=NULL, *indexReducedNodes=NULL, *node_distribution=NULL;
28 if (in==NULL) return;
29 if (in->Nodes == NULL) return;
30
31 /* first step is to distribute the elements according to a global distribution of DOF */
32
33 distribution=TMPMEMALLOC(in->MPIInfo->size+1,index_t);
34 node_distribution=TMPMEMALLOC(in->MPIInfo->size+1,index_t);
35 if (! (Finley_checkPtr(distribution) || Finley_checkPtr(node_distribution))) {
36 /* first we create dense labeling for the DOFs */
37
38 newGlobalNumDOFs=Finley_NodeFile_createDenseDOFLabeling(in->Nodes);
39
40 /* create a distribution of the global DOFs and determine
41 the MPI_rank controling the DOFs on this processor */
42 Paso_MPIInfo_setDistribution(in->MPIInfo,0,newGlobalNumDOFs-1,distribution);
43
44 /* now the mesh is re-distributed according to the mpiRankOfDOF vector */
45 /* this will redistribute the Nodes and Elements including overlap and will create an element coloring
46 but will not create any mappings (see later in this function) */
47 if (Finley_noError()) Finley_Mesh_distributeByRankOfDOF(in,distribution);
48 }
49
50 /* at this stage we are able to start an optimization of the DOF distribution using ParaMetis */
51 /* on return distribution is altered and new DOF ids have been assigned */
52 if (Finley_noError() && optimize && in->MPIInfo->size>1) {
53 Finley_Mesh_optimizeDOFDistribution(in,distribution);
54 if (Finley_noError()) Finley_Mesh_distributeByRankOfDOF(in,distribution);
55 }
56 /* the local labeling of the degrees of free is optimized */
57 if (Finley_noError() && optimize) {
58 Finley_Mesh_optimizeDOFLabeling(in,distribution);
59 }
60 /* rearrange elements with the attempt to bring elements closer to memory locations of the nodes (distributed shared memory!): */
61 if (Finley_noError()) Finley_Mesh_optimizeElementOrdering(in);
62
63
64 /* create the global indices */
65 if (Finley_noError()) {
66
67
68 maskReducedNodes=TMPMEMALLOC(in->Nodes->numNodes,index_t);
69 indexReducedNodes=TMPMEMALLOC(in->Nodes->numNodes,index_t);
70 if (! ( Finley_checkPtr(maskReducedNodes) || Finley_checkPtr(indexReducedNodes) ) ) {
71
72 /* useful DEBUG:
73 {index_t MIN_id,MAX_id;
74 printf("Mesh_prepare: global DOF : %d\n",newGlobalNumDOFs);
75 Finley_NodeFile_setGlobalIdRange(&MIN_id,&MAX_id,in->Nodes);
76 printf("Mesh_prepare: global node id range = %d :%d\n", MIN_id,MAX_id);
77 Finley_NodeFile_setIdRange(&MIN_id,&MAX_id,in->Nodes);
78 printf("Mesh_prepare: local node id range = %d :%d\n", MIN_id,MAX_id);
79 }
80 */
81 #pragma omp parallel for private(i) schedule(static)
82 for (i=0;i<in->Nodes->numNodes;++i) maskReducedNodes[i]=-1;
83
84 Finley_Mesh_markNodes(maskReducedNodes,0,in,TRUE);
85
86 numReducedNodes=Finley_Util_packMask(in->Nodes->numNodes,maskReducedNodes,indexReducedNodes);
87
88 Finley_NodeFile_createDenseNodeLabeling(in->Nodes, node_distribution, distribution);
89 Finley_NodeFile_createDenseReducedDOFLabeling(in->Nodes,maskReducedNodes);
90 Finley_NodeFile_createDenseReducedNodeLabeling(in->Nodes,maskReducedNodes);
91 /* create the missing mappings */
92
93 if (Finley_noError()) Finley_Mesh_createNodeFileMappings(in,numReducedNodes,indexReducedNodes,distribution, node_distribution);
94 }
95
96 TMPMEMFREE(maskReducedNodes);
97 TMPMEMFREE(indexReducedNodes);
98 }
99
100 TMPMEMFREE(distribution);
101 TMPMEMFREE(node_distribution);
102
103 Finley_Mesh_setTagsInUse(in);
104 return;
105 }
106
107 /* */
108 /* tries to reduce the coloring for all element files: */
109 /* */
110 void Finley_Mesh_createColoring(Finley_Mesh* in, index_t *node_localDOF_map) {
111 if (Finley_noError()) Finley_ElementFile_createColoring(in->Elements,in->Nodes->numNodes,node_localDOF_map);
112 if (Finley_noError()) Finley_ElementFile_createColoring(in->FaceElements,in->Nodes->numNodes,node_localDOF_map);
113 if (Finley_noError()) Finley_ElementFile_createColoring(in->Points,in->Nodes->numNodes,node_localDOF_map);
114 if (Finley_noError()) Finley_ElementFile_createColoring(in->ContactElements,in->Nodes->numNodes,node_localDOF_map);
115 }
116 /* */
117 /* redistribute elements to minimize communication during assemblage */
118 /* */
119 void Finley_Mesh_optimizeElementOrdering(Finley_Mesh* in) {
120 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->Elements));
121 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->FaceElements));
122 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->Points));
123 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->ContactElements));
124 }
125
126 /* */
127 /* redistribute elements to minimize communication during assemblage */
128 void Finley_Mesh_setTagsInUse(Finley_Mesh* in)
129 {
130 if (Finley_noError()) Finley_NodeFile_setTagsInUse(in->Nodes);
131 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->Elements);
132 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->FaceElements);
133 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->Points);
134 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->ContactElements);
135 }

Properties

Name Value
svn:eol-style native
svn:keywords Author Date Id Revision

  ViewVC Help
Powered by ViewVC 1.1.26