/[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 1766 - (show annotations)
Mon Sep 8 02:51:14 2008 UTC (10 years, 10 months ago) by gross
File MIME type: text/plain
File size: 6355 byte(s)
code formatting
1
2 /* $Id$ */
3
4 /*******************************************************
5 *
6 * Copyright 2003-2007 by ACceSS MNRF
7 * Copyright 2007 by University of Queensland
8 *
9 * http://esscc.uq.edu.au
10 * Primary Business: Queensland, Australia
11 * Licensed under the Open Software License version 3.0
12 * http://www.opensource.org/licenses/osl-3.0.php
13 *
14 *******************************************************/
15
16 /**************************************************************/
17
18 /* Finley: Mesh: prepares the mesh for further calculations */
19
20 /**************************************************************/
21
22 #include "Mesh.h"
23
24 /**************************************************************/
25
26 void Finley_Mesh_prepare(Finley_Mesh* in, bool_t optimize) {
27 dim_t newGlobalNumDOFs=0, numReducedNodes=0,i;
28 index_t* distribution=NULL, *maskReducedNodes=NULL, *indexReducedNodes=NULL, *node_distribution=NULL;
29 if (in==NULL) return;
30 if (in->Nodes == NULL) return;
31
32 /* first step is to distribute the elements according to a global distribution of DOF */
33
34 distribution=TMPMEMALLOC(in->MPIInfo->size+1,index_t);
35 node_distribution=TMPMEMALLOC(in->MPIInfo->size+1,index_t);
36 if (! (Finley_checkPtr(distribution) || Finley_checkPtr(node_distribution))) {
37 /* first we create dense labeling for the DOFs */
38
39 newGlobalNumDOFs=Finley_NodeFile_createDenseDOFLabeling(in->Nodes);
40
41 /* create a distribution of the global DOFs and determine
42 the MPI_rank controling the DOFs on this processor */
43 Paso_MPIInfo_setDistribution(in->MPIInfo,0,newGlobalNumDOFs-1,distribution);
44
45 /* now the mesh is re-distributed according to the mpiRankOfDOF vector */
46 /* this will redistribute the Nodes and Elements including overlap and will create an element coloring
47 but will not create any mappings (see later in this function) */
48 if (Finley_noError()) Finley_Mesh_distributeByRankOfDOF(in,distribution);
49 }
50
51 /* at this stage we are able to start an optimization of the DOF distribution using ParaMetis */
52 /* on return distribution is altered and new DOF ids have been assigned */
53 if (Finley_noError() && optimize && in->MPIInfo->size>1) {
54 Finley_Mesh_optimizeDOFDistribution(in,distribution);
55 if (Finley_noError()) Finley_Mesh_distributeByRankOfDOF(in,distribution);
56 }
57 /* the local labeling of the degrees of free is optimized */
58 if (Finley_noError() && optimize) {
59 Finley_Mesh_optimizeDOFLabeling(in,distribution);
60 }
61 /* rearrange elements with the attempt to bring elements closer to memory locations of the nodes (distributed shared memory!): */
62 if (Finley_noError()) Finley_Mesh_optimizeElementOrdering(in);
63
64
65 /* create the global indices */
66 if (Finley_noError()) {
67
68
69 maskReducedNodes=TMPMEMALLOC(in->Nodes->numNodes,index_t);
70 indexReducedNodes=TMPMEMALLOC(in->Nodes->numNodes,index_t);
71 if (! ( Finley_checkPtr(maskReducedNodes) || Finley_checkPtr(indexReducedNodes) ) ) {
72
73 /* useful DEBUG:
74 {index_t MIN_id,MAX_id;
75 printf("Mesh_prepare: global DOF : %d\n",newGlobalNumDOFs);
76 Finley_NodeFile_setGlobalIdRange(&MIN_id,&MAX_id,in->Nodes);
77 printf("Mesh_prepare: global node id range = %d :%d\n", MIN_id,MAX_id);
78 Finley_NodeFile_setIdRange(&MIN_id,&MAX_id,in->Nodes);
79 printf("Mesh_prepare: local node id range = %d :%d\n", MIN_id,MAX_id);
80 }
81 */
82 #pragma omp parallel for private(i) schedule(static)
83 for (i=0;i<in->Nodes->numNodes;++i) maskReducedNodes[i]=-1;
84
85 Finley_Mesh_markNodes(maskReducedNodes,0,in,TRUE);
86
87 numReducedNodes=Finley_Util_packMask(in->Nodes->numNodes,maskReducedNodes,indexReducedNodes);
88
89 Finley_NodeFile_createDenseNodeLabeling(in->Nodes, node_distribution, distribution);
90 Finley_NodeFile_createDenseReducedDOFLabeling(in->Nodes,maskReducedNodes);
91 Finley_NodeFile_createDenseReducedNodeLabeling(in->Nodes,maskReducedNodes);
92 /* create the missing mappings */
93
94 if (Finley_noError()) Finley_Mesh_createNodeFileMappings(in,numReducedNodes,indexReducedNodes,distribution, node_distribution);
95 }
96
97 TMPMEMFREE(maskReducedNodes);
98 TMPMEMFREE(indexReducedNodes);
99 }
100
101 TMPMEMFREE(distribution);
102 TMPMEMFREE(node_distribution);
103
104 Finley_Mesh_setTagsInUse(in);
105 return;
106 }
107
108 /* */
109 /* tries to reduce the coloring for all element files: */
110 /* */
111 void Finley_Mesh_createColoring(Finley_Mesh* in, index_t *node_localDOF_map) {
112 if (Finley_noError()) Finley_ElementFile_createColoring(in->Elements,in->Nodes->numNodes,node_localDOF_map);
113 if (Finley_noError()) Finley_ElementFile_createColoring(in->FaceElements,in->Nodes->numNodes,node_localDOF_map);
114 if (Finley_noError()) Finley_ElementFile_createColoring(in->Points,in->Nodes->numNodes,node_localDOF_map);
115 if (Finley_noError()) Finley_ElementFile_createColoring(in->ContactElements,in->Nodes->numNodes,node_localDOF_map);
116 }
117 /* */
118 /* redistribute elements to minimize communication during assemblage */
119 /* */
120 void Finley_Mesh_optimizeElementOrdering(Finley_Mesh* in) {
121 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->Elements));
122 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->FaceElements));
123 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->Points));
124 if (Finley_noError()) Finley_ElementFile_optimizeOrdering(&(in->ContactElements));
125 }
126
127 /* */
128 /* redistribute elements to minimize communication during assemblage */
129 void Finley_Mesh_setTagsInUse(Finley_Mesh* in)
130 {
131 if (Finley_noError()) Finley_NodeFile_setTagsInUse(in->Nodes);
132 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->Elements);
133 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->FaceElements);
134 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->Points);
135 if (Finley_noError()) Finley_ElementFile_setTagsInUse(in->ContactElements);
136 }

Properties

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

  ViewVC Help
Powered by ViewVC 1.1.26