void setCpGridZoltanGraphFunctions(Zoltan_Struct *zz, const Dune::CpGrid& grid,
bool pretendNull)
{
Dune::CpGrid *gridPointer = const_cast<Dune::CpGrid*>(&grid);
if ( pretendNull )
{
Zoltan_Set_Num_Obj_Fn(zz, getNullNumCells, gridPointer);
Zoltan_Set_Obj_List_Fn(zz, getNullVertexList, gridPointer);
Zoltan_Set_Num_Edges_Multi_Fn(zz, getNullNumEdgesList, gridPointer);
Zoltan_Set_Edge_List_Multi_Fn(zz, getNullEdgeList, gridPointer);
}
else
{
Zoltan_Set_Num_Obj_Fn(zz, getCpGridNumCells, gridPointer);
Zoltan_Set_Obj_List_Fn(zz, getCpGridVertexList, gridPointer);
Zoltan_Set_Num_Edges_Multi_Fn(zz, getCpGridNumEdgesList, gridPointer);
Zoltan_Set_Edge_List_Multi_Fn(zz, getCpGridEdgeList, gridPointer);
}
}
void setCpGridZoltanGraphFunctions(Zoltan_Struct *zz,
const CombinedGridWellGraph& graph,
bool pretendNull)
{
Dune::CpGrid *gridPointer = const_cast<Dune::CpGrid*>(&graph.getGrid());
if ( pretendNull )
{
Zoltan_Set_Num_Obj_Fn(zz, getNullNumCells, gridPointer);
Zoltan_Set_Obj_List_Fn(zz, getNullVertexList, gridPointer);
Zoltan_Set_Num_Edges_Multi_Fn(zz, getNullNumEdgesList, gridPointer);
Zoltan_Set_Edge_List_Multi_Fn(zz, getNullEdgeList, gridPointer);
}
else
{
CombinedGridWellGraph* graphPointer = const_cast<CombinedGridWellGraph*>(&graph);
Zoltan_Set_Num_Obj_Fn(zz, getCpGridNumCells, gridPointer);
Zoltan_Set_Obj_List_Fn(zz, getCpGridVertexList, gridPointer);
Zoltan_Set_Num_Edges_Multi_Fn(zz, getCpGridWellsNumEdgesList, graphPointer);
Zoltan_Set_Edge_List_Multi_Fn(zz, getCpGridWellsEdgeList, graphPointer);
}
}
int main(int argc, char *argv[])
{
int rc, i, ngids, maxcol, ncolors;
float ver;
struct Zoltan_Struct *zz=NULL;
#ifdef ZOLTANV31
int numGidEntries, numLidEntries;
#else
ZOLTAN_GRAPH_EVAL graph;
#endif
int *color;
ZOLTAN_ID_PTR gid_list;
UZData guz, *uz=&guz;
int msg_tag = 9999;
int nlvtx, next, maxdeg=0;
double times[9]={0.,0.,0.,0.,0.,0.,0.,0.}; /* Used for timing measurements */
double gtimes[9]={0.,0.,0.,0.,0.,0.,0.,0.}; /* Used for timing measurements */
/******************************************************************
** Initialize MPI and Zoltan
******************************************************************/
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &uz->myRank);
MPI_Comm_size(MPI_COMM_WORLD, &uz->numProcs);
MPI_Barrier(MPI_COMM_WORLD);
times[0] = u_wseconds();
rc = Zoltan_Initialize(argc, argv, &ver);
if (rc != ZOLTAN_OK){
fprintf(stderr, "Sorry Zoltan initialize failed...\n");
goto End;
}
zz = Zoltan_Create(MPI_COMM_WORLD);
if (argc<3 && !uz->myRank) {
fprintf(stderr, "usage: %s [meshR] [meshC] [X-point stencil] [procR] [procC] [ws-beta] [<ZoltanParam>=<Val>] ...\n\n", argv[0]);
fprintf(stderr, "ws-beta: is the probablity of adding an edge to a vertex to generate Watts-Strogatz graphs\n");
fprintf(stderr, "Valid values for Stencil are 5, 7 and 9\n");
fprintf(stderr, "Zoltan Coloring Parameters and values are\n");
fprintf(stderr, "\tDISTANCE : 1 or 2\n");
fprintf(stderr, "\tSUPERSTEP_SIZE : suggested >= 100\n");
fprintf(stderr, "\tCOMM_PATTERN : S or A\n");
fprintf(stderr, "\tCOLOR_ORDER : I, B, U\n");
fprintf(stderr, "\tCOLORING_METHOD : F (for now)\n");
fprintf(stderr, "\n");
}
uz->procR = uz->procC = 0;
uz->meshR = uz->meshC = 1024;
uz->stencil = 9;
if (argc>1)
uz->meshR = atoi(argv[1]);
if (argc>2)
uz->meshC = atoi(argv[2]);
if (argc>3)
uz->stencil = atoi(argv[3]);
if (uz->stencil!=5 && uz->stencil!=7 && uz->stencil!=9) {
fprintf(stderr, "\t invalid stencil value. Valid values are 5, 7 and 9. Assumed 9.\n");
uz->stencil = 9;
}
--uz->stencil;
if (argc>4)
uz->procR = atoi(argv[4]);
if (argc>5)
uz->procC = atoi(argv[5]);
if (uz->procR <= 0 || uz->procC <= 0)
computeProcMesh(uz);
if (uz->procR*uz->procC!=uz->numProcs) {
fprintf(stderr, "#Procs=%d but requested %dx%d Proc Mesh Partitioning...\n", uz->numProcs, uz->procR, uz->procC);
goto End;
}
if (argc>6)
uz->beta = atof(argv[6]);
else
uz->beta = 0.0;
/* compute which part of mesh I will compute */
uz->myR = uz->myRank / uz->procC;
uz->myC = uz->myRank % uz->procC;
uz->_sr = uz->myR * (uz->meshR / uz->procR);
uz->_er = (uz->myR+1) * (uz->meshR / uz->procR);
if (uz->_er>uz->meshR)
uz->_er = uz->meshR;
uz->_sc = uz->myC * (uz->meshC / uz->procC);
uz->_ec = (uz->myC+1) * (uz->meshC / uz->procC);
if (uz->_ec>uz->meshC)
uz->_ec = uz->meshC;
if ( (uz->meshR % uz->procR) !=0 || (uz->meshC % uz->procC)!=0) {
printf("Mesh dimensions are not divisible with proc mesh.\nRequested mesh is %dx%d and proc mesh is %d x %d\n", uz->meshR, uz->meshC, uz->procR, uz->procC);
exit(1);
}
nlvtx= (uz->_er-uz->_sr) * (uz->_ec-uz->_sc);
if (uz->myRank==0)
printf("Running %s on %d x %d processor mesh, generating %d-point %d x %d mesh with beta=%.3lf\n", argv[0], uz->procR, uz->procC, uz->stencil+1, uz->meshR, uz->meshC, uz->beta);
times[1] = u_wseconds();
uz->numredge = 0;
uz->redgeto = NULL;
if (uz->beta>0) { /* create random edges for WS graph */
int ngvtx=uz->meshC*uz->meshR, trsh=(int) (uz->beta*100.0);
int ierr=0;
int *edges=NULL, *redges=NULL, *proclist=NULL, nedge;
ZOLTAN_COMM_OBJ *plan;
uz->redgeto = (int *) malloc(nlvtx*sizeof(int));
for (i=0; i<nlvtx; ++i) {
int rv = Zoltan_Rand_InRange(NULL, 100);
if ( rv < trsh) {
if ((uz->redgeto[i] = Zoltan_Rand_InRange(NULL, ngvtx))==gIDfLID(i)) /* is it a self edge */
uz->redgeto[i] = -1;
else
++uz->numredge;
} else
uz->redgeto[i] = -1;
}
edges = (int *) malloc(sizeof(int)*2*uz->numredge);
proclist = (int *) malloc(sizeof(int)*uz->numredge);
next = 0;
for (i=0; i<nlvtx; ++i)
if (uz->redgeto[i]>0) {
edges[2*next] = uz->redgeto[i];
edges[2*next+1] = gIDfLID(i);
proclist[next] = pIDfGID(uz->redgeto[i]);
++next;
}
ierr = Zoltan_Comm_Create(&plan, uz->numredge, proclist, MPI_COMM_WORLD,
msg_tag, &nedge);
redges = (int *) malloc(sizeof(int)*2*nedge);
--msg_tag;
ierr |= Zoltan_Comm_Do(plan, msg_tag, (char *) edges, 2*sizeof(int),
(char *) redges);
ierr |= Zoltan_Comm_Destroy(&plan);
free(proclist);
free(edges);
if (ierr) {
printf("error while communicating edges!\n");
exit(1);
}
xadj = (int *) calloc(1+nlvtx, sizeof(int));
adj = (int *) malloc(sizeof(int)*nedge);
for (i=0; i<nedge; ++i) {
if (redges[2*i] < gID(uz->_sr, uz->_sc) || redges[2*i] >= gID(uz->_er, uz->_ec)) {
printf("[%d/%d] received gid=%d doesn't blong to processor range [%d, %d) should go to proc %d\n", uz->myRank, uz->numProcs, redges[2*i], gID(uz->_sr, uz->_sc), gID(uz->_er, uz->_ec), pIDfGID(redges[2*i]));
}
++xadj[lIDfGID(redges[2*i])];
}
xadj[nlvtx] = nedge;
maxdeg = xadj[0];
for (i=1; i<nlvtx; ++i) {
maxdeg = xadj[i]>maxdeg ? xadj[i] : maxdeg;
xadj[i] += xadj[i-1];
}
for (i=0; i<nedge; ++i) {
int u = lIDfGID(redges[2*i]);
int v = redges[2*i+1];
adj[--xadj[u]] = v;
}
free(redges);
}
maxdeg += uz->stencil+1;
adjTemp = (int *) malloc(sizeof(int)*2*maxdeg);
times[2] = u_wseconds();
/*
printf("My rank %d/%d at proc-mesh loc (%d, %d) generating [%d, %d) x [%d, %d) + %d random edges TotEdge=%d\n", uz->myRank, uz->numProcs, uz->myR, uz->myC, uz->_sr, uz->_er, uz->_sc, uz->_ec, uz->numredge, xadj[nlvtx]); */
printStats("Number of Vertices ", nlvtx, uz->myRank, uz->numProcs);
if (xadj)
printStats("Number of Rand Edges", xadj[nlvtx], uz->myRank, uz->numProcs);
/* General parameters */
#ifndef ZOLTANV31
Zoltan_Set_Param(zz, "GRAPH_BUILD_TYPE", "FAST_NO_DUP");
#endif
/* General parameters */
Zoltan_Set_Param(zz, "DEBUG_LEVEL", "3");
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz, "OBJ_WEIGHT_DIM", "0");
/* coloring parameters */
Zoltan_Set_Param(zz, "SUPERSTEP_SIZE", "500"); /* let's make S=500 default */
for (i=7; i<argc; ++i) {
char param[256], *eq;
if (!uz->myRank)
printf("processing argv[%d]='%s'\n", i, argv[i]);
strncpy(param, argv[i], sizeof(param));
eq = strchr(param, '=');
if (!eq) {
fprintf(stderr, "invalid argument '%s', Zoltan Paramters should be in the format <ZoltanParam>=<Val>\n", param);
goto End;
}
*eq = 0;
Zoltan_Set_Param(zz, param, eq+1);
}
#if 0
/* Graph parameters */
Zoltan_Set_Param(zz, "CHECK_GRAPH", "2");
#endif
/* set call backs */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_objects, uz);
Zoltan_Set_Obj_List_Fn(zz, get_object_list, uz);
Zoltan_Set_Num_Edges_Multi_Fn(zz, get_num_edges_list, uz);
Zoltan_Set_Edge_List_Multi_Fn(zz, get_edge_list, uz);
#if 0
#ifndef ZOLTANV31
Zoltan_LB_Eval_Graph(zz, 0, &graph);
if (!uz->myRank) {
printf("EdgeCut Min=%8.0f Max=%8.0f Sum=%8.0f\n", graph.cuts[EVAL_GLOBAL_MIN], graph.cuts[EVAL_GLOBAL_MAX], graph.cuts[EVAL_GLOBAL_SUM]);
printf("#Vertices Min=%8.0f Max=%8.0f Sum=%8.0f imbal=%.2f\n", graph.nobj[EVAL_GLOBAL_MIN], graph.nobj[EVAL_GLOBAL_MAX], graph.nobj[EVAL_GLOBAL_SUM], graph.obj_imbalance);
}
#endif
#endif
/* now color */
ngids = get_number_of_objects(uz, &rc);
gid_list = (ZOLTAN_ID_PTR) malloc(sizeof(ZOLTAN_ID_TYPE) * ngids);
#ifndef ZOLTANV31
next = 0;
for (i=uz->_sr; i<uz->_er; ++i) {
int j;
for (j=uz->_sc; j<uz->_ec; ++j) {
gid_list[next++] = i*uz->meshC + j;
}
}
#endif
color = (int *) malloc(sizeof(int) * ngids);
MPI_Barrier(MPI_COMM_WORLD);
times[3] = u_wseconds();
#ifdef ZOLTANV31
rc = Zoltan_Color(zz, /* input (all remaining fields are output) */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
ngids, /* #objects to color in this proc */
gid_list, /* global ids of colored vertices */
NULL, /* we ignore local ids */
color); /* result color */
#else
rc = Zoltan_Color(zz, /* input (all remaining fields are output) */
1, /* Number of integers used for a global ID */
ngids, /* #objects to color in this proc */
gid_list, /* global ids of colored vertices */
color); /* result color */
#endif
MPI_Barrier(MPI_COMM_WORLD);
times[4] = u_wseconds();
MPI_Reduce(times, gtimes, 5, MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_WORLD);
if (rc != ZOLTAN_OK)
fprintf(stderr, "Zoltan_Color failed with return code %d...\n", rc);
for (maxcol=i=0; i<ngids; ++i)
if (color[i] > maxcol)
maxcol = color[i];
MPI_Reduce(&maxcol, &ncolors, 1, MPI_INT, MPI_MAX, 0, MPI_COMM_WORLD);
if (uz->myRank==0) {
struct rusage usage;
printf("%s setup Proc-0: %8.2lf Max: %8.2lf\n", argv[0], times[1]-times[0], gtimes[1]-gtimes[0]);
printf("%s gen rand edges Proc-0: %8.2lf Max: %8.2lf\n", argv[0], times[2]-times[1], gtimes[2]-gtimes[1]);
printf("%s set gids Proc-0: %8.2lf Max: %8.2lf\n", argv[0], times[3]-times[2], gtimes[3]-gtimes[2]);
printf("%s Zoltan_Color call Proc-0: %8.2lf Max: %8.2lf\n", argv[0], times[4]-times[3], gtimes[4]-gtimes[3]);
printf("%s Coloring Time : %.2lf # Colors used : %d\n", argv[0], gtimes[4]-gtimes[0], ncolors);
getrusage(RUSAGE_SELF, &usage);
printf("%s maxrss=%ld minflt=%ld majflt=%ld nswap=%ld\n", argv[0], usage.ru_maxrss, usage.ru_minflt, usage.ru_majflt, usage.ru_nswap);
}
#ifdef _DEBUG
saveColor(argv[0], uz, (int *) gid_list, color, ngids);
#endif
/******************************************************************
** Clean up
******************************************************************/
if (gid_list)
free(gid_list);
if (color)
free(color);
if (xadj)
free(xadj);
if (adj)
free(adj);
if (adjTemp)
free(adjTemp);
if (uz->redgeto)
free(uz->redgeto);
End:
Zoltan_Destroy(&zz);
MPI_Finalize();
return 0;
}
int main(int argc, char *argv[])
{
int i, rc;
float ver;
struct Zoltan_Struct *zz;
int changes, numGidEntries, numLidEntries, numImport, numExport;
int myRank, numProcs;
ZOLTAN_ID_PTR importGlobalGids, importLocalGids, exportGlobalGids, exportLocalGids;
int *importProcs, *importToPart, *exportProcs, *exportToPart;
int *parts;
FILE *fp;
GRAPH_DATA myGraph;
/******************************************************************
** Initialize MPI and Zoltan
******************************************************************/
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &myRank);
MPI_Comm_size(MPI_COMM_WORLD, &numProcs);
rc = Zoltan_Initialize(argc, argv, &ver);
if (rc != ZOLTAN_OK){
printf("sorry...\n");
MPI_Finalize();
exit(0);
}
/******************************************************************
** Read graph from input file and distribute it
******************************************************************/
fp = fopen(fname, "r");
if (!fp){
if (myRank == 0) fprintf(stderr,"ERROR: Can not open %s\n",fname);
MPI_Finalize();
exit(1);
}
fclose(fp);
read_input_file(myRank, numProcs, fname, &myGraph);
/******************************************************************
** Create a Zoltan library structure for this instance of load
** balancing. Set the parameters and query functions that will
** govern the library's calculation. See the Zoltan User's
** Guide for the definition of these and many other parameters.
******************************************************************/
zz = Zoltan_Create(MPI_COMM_WORLD);
/* General parameters */
/*
Zoltan_Set_Param(zz, "DEBUG_LEVEL", "0");
Zoltan_Set_Param(zz, "LB_METHOD", "GRAPH");
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz, "OBJ_WEIGHT_DIM", "0");
Zoltan_Set_Param(zz, "RETURN_LISTS", "ALL");
*/
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz,"LB_METHOD","GRAPH");
#ifdef HAVE_PARMETIS
Zoltan_Set_Param(zz,"GRAPH_PACKAGE","PARMETIS");
#else
#ifdef HAVE_SCOTCH
Zoltan_Set_Param(zz,"GRAPH_PACKAGE","SCOTCH");
#endif
#endif
Zoltan_Set_Param(zz,"EDGE_WEIGHT_DIM","1");
Zoltan_Set_Param(zz, "OBJ_WEIGHT_DIM", "0");
Zoltan_Set_Param(zz,"LB_APPROACH","REPARTITION");
Zoltan_Set_Param(zz,"GRAPH_SYMMETRIZE","TRANSPOSE");
Zoltan_Set_Param(zz,"GRAPH_SYM_WEIGHT","ADD");
/* Graph parameters */
Zoltan_Set_Param(zz, "CHECK_GRAPH", "2");
Zoltan_Set_Param(zz, "PHG_EDGE_SIZE_THRESHOLD", ".35"); /* 0-remove all, 1-remove none */
/* Query functions - defined in simpleQueries.h */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_vertices, &myGraph);
Zoltan_Set_Obj_List_Fn(zz, get_vertex_list, &myGraph);
Zoltan_Set_Num_Edges_Multi_Fn(zz, get_num_edges_list, &myGraph);
Zoltan_Set_Edge_List_Multi_Fn(zz, get_edge_list, &myGraph);
/******************************************************************
** Zoltan can now partition the simple graph.
** In this simple example, we assume the number of partitions is
** equal to the number of processes. Process rank 0 will own
** partition 0, process rank 1 will own partition 1, and so on.
******************************************************************/
rc = Zoltan_LB_Partition(zz, /* input (all remaining fields are output) */
&changes, /* 1 if partitioning was changed, 0 otherwise */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
&numImport, /* Number of vertices to be sent to me */
&importGlobalGids, /* Global IDs of vertices to be sent to me */
&importLocalGids, /* Local IDs of vertices to be sent to me */
&importProcs, /* Process rank for source of each incoming vertex */
&importToPart, /* New partition for each incoming vertex */
&numExport, /* Number of vertices I must send to other processes*/
&exportGlobalGids, /* Global IDs of the vertices I must send */
&exportLocalGids, /* Local IDs of the vertices I must send */
&exportProcs, /* Process to which I send each of the vertices */
&exportToPart); /* Partition to which each vertex will belong */
if (rc != ZOLTAN_OK){
printf("sorry...\n");
MPI_Finalize();
Zoltan_Destroy(&zz);
exit(0);
}
/******************************************************************
** Visualize the graph partitioning before and after calling Zoltan.
******************************************************************/
parts = (int *)malloc(sizeof(int) * myGraph.numMyVertices);
for (i=0; i < myGraph.numMyVertices; i++){
parts[i] = myRank;
}
if (myRank== 0){
printf("\nGraph partition before calling Zoltan\n");
}
showGraphPartitions(myRank, myGraph.numMyVertices, myGraph.vertexGID, parts, numProcs);
for (i=0; i < numExport; i++){
parts[exportLocalGids[i]] = exportToPart[i];
}
if (myRank == 0){
printf("Graph partition after calling Zoltan\n");
}
showGraphPartitions(myRank, myGraph.numMyVertices, myGraph.vertexGID, parts, numProcs);
free(parts);
/******************************************************************
** Free the arrays allocated by Zoltan_LB_Partition, and free
** the storage allocated for the Zoltan structure.
******************************************************************/
Zoltan_LB_Free_Part(&importGlobalGids, &importLocalGids,
&importProcs, &importToPart);
Zoltan_LB_Free_Part(&exportGlobalGids, &exportLocalGids,
&exportProcs, &exportToPart);
Zoltan_Destroy(&zz);
/**********************
** all done ***********
**********************/
MPI_Finalize();
if (myGraph.numMyVertices > 0){
free(myGraph.vertexGID);
free(myGraph.nborIndex);
if (myGraph.numAllNbors > 0){
free(myGraph.nborGID);
free(myGraph.nborProc);
}
}
return 0;
}
int Zoltan_Set_Fn(ZZ *zz, ZOLTAN_FN_TYPE fn_type, ZOLTAN_VOID_FN *fn,
void *data)
{
/*
* Function to initialize a given LB interface function.
* Input:
* zz -- Pointer to a Zoltan structure.
* fn_type -- Enum type indicating the function to be set.
* fn -- Pointer to the function to be used in the
* assignment.
* data -- Pointer to data that the LB library will
* pass as an argument to fn(). May be NULL.
* Output:
* zz -- Appropriate field set to value in void *().
*/
char *yo = "Zoltan_Set_Fn";
char msg[256];
int ierr;
switch (fn_type) {
case ZOLTAN_PART_FN_TYPE:
ierr = Zoltan_Set_Part_Fn(zz,
(ZOLTAN_PART_FN *) fn, data);
break;
case ZOLTAN_PART_MULTI_FN_TYPE:
ierr = Zoltan_Set_Part_Multi_Fn(zz,
(ZOLTAN_PART_MULTI_FN *) fn, data);
break;
case ZOLTAN_NUM_EDGES_FN_TYPE:
ierr = Zoltan_Set_Num_Edges_Fn(zz,
(ZOLTAN_NUM_EDGES_FN *) fn, data);
break;
case ZOLTAN_NUM_EDGES_MULTI_FN_TYPE:
ierr = Zoltan_Set_Num_Edges_Multi_Fn(zz,
(ZOLTAN_NUM_EDGES_MULTI_FN *) fn, data);
break;
case ZOLTAN_EDGE_LIST_FN_TYPE:
ierr = Zoltan_Set_Edge_List_Fn(zz,
(ZOLTAN_EDGE_LIST_FN *) fn, data);
break;
case ZOLTAN_EDGE_LIST_MULTI_FN_TYPE:
ierr = Zoltan_Set_Edge_List_Multi_Fn(zz,
(ZOLTAN_EDGE_LIST_MULTI_FN *) fn, data);
break;
case ZOLTAN_NUM_GEOM_FN_TYPE:
ierr = Zoltan_Set_Num_Geom_Fn(zz,
(ZOLTAN_NUM_GEOM_FN *) fn, data);
break;
case ZOLTAN_GEOM_MULTI_FN_TYPE:
ierr = Zoltan_Set_Geom_Multi_Fn(zz,
(ZOLTAN_GEOM_MULTI_FN *) fn, data);
break;
case ZOLTAN_GEOM_FN_TYPE:
ierr = Zoltan_Set_Geom_Fn(zz,
(ZOLTAN_GEOM_FN *) fn, data);
break;
case ZOLTAN_NUM_OBJ_FN_TYPE:
ierr = Zoltan_Set_Num_Obj_Fn(zz,
(ZOLTAN_NUM_OBJ_FN *) fn, data);
break;
case ZOLTAN_OBJ_LIST_FN_TYPE:
ierr = Zoltan_Set_Obj_List_Fn(zz,
(ZOLTAN_OBJ_LIST_FN *) fn, data);
break;
case ZOLTAN_FIRST_OBJ_FN_TYPE:
ierr = Zoltan_Set_First_Obj_Fn(zz,
(ZOLTAN_FIRST_OBJ_FN *) fn, data);
break;
case ZOLTAN_NEXT_OBJ_FN_TYPE:
ierr = Zoltan_Set_Next_Obj_Fn(zz,
(ZOLTAN_NEXT_OBJ_FN *) fn, data);
break;
case ZOLTAN_NUM_BORDER_OBJ_FN_TYPE:
ierr = Zoltan_Set_Num_Border_Obj_Fn(zz,
(ZOLTAN_NUM_BORDER_OBJ_FN *) fn, data);
break;
case ZOLTAN_BORDER_OBJ_LIST_FN_TYPE:
ierr = Zoltan_Set_Border_Obj_List_Fn(zz,
(ZOLTAN_BORDER_OBJ_LIST_FN *) fn, data);
break;
case ZOLTAN_FIRST_BORDER_OBJ_FN_TYPE:
ierr = Zoltan_Set_First_Border_Obj_Fn(zz,
(ZOLTAN_FIRST_BORDER_OBJ_FN *) fn, data);
break;
case ZOLTAN_NEXT_BORDER_OBJ_FN_TYPE:
ierr = Zoltan_Set_Next_Border_Obj_Fn(zz,
(ZOLTAN_NEXT_BORDER_OBJ_FN *) fn, data);
break;
case ZOLTAN_PRE_MIGRATE_PP_FN_TYPE:
ierr = Zoltan_Set_Pre_Migrate_PP_Fn(zz,
(ZOLTAN_PRE_MIGRATE_PP_FN *) fn, data);
break;
case ZOLTAN_MID_MIGRATE_PP_FN_TYPE:
ierr = Zoltan_Set_Mid_Migrate_PP_Fn(zz,
(ZOLTAN_MID_MIGRATE_PP_FN *) fn, data);
break;
case ZOLTAN_POST_MIGRATE_PP_FN_TYPE:
ierr = Zoltan_Set_Post_Migrate_PP_Fn(zz,
(ZOLTAN_POST_MIGRATE_PP_FN *) fn, data);
break;
case ZOLTAN_PRE_MIGRATE_FN_TYPE:
ierr = Zoltan_Set_Pre_Migrate_Fn(zz,
(ZOLTAN_PRE_MIGRATE_FN *) fn, data);
break;
case ZOLTAN_MID_MIGRATE_FN_TYPE:
ierr = Zoltan_Set_Mid_Migrate_Fn(zz,
(ZOLTAN_MID_MIGRATE_FN *) fn, data);
break;
case ZOLTAN_POST_MIGRATE_FN_TYPE:
ierr = Zoltan_Set_Post_Migrate_Fn(zz,
(ZOLTAN_POST_MIGRATE_FN *) fn, data);
break;
case ZOLTAN_OBJ_SIZE_FN_TYPE:
ierr = Zoltan_Set_Obj_Size_Fn(zz,
(ZOLTAN_OBJ_SIZE_FN *) fn, data);
break;
case ZOLTAN_OBJ_SIZE_MULTI_FN_TYPE:
ierr = Zoltan_Set_Obj_Size_Multi_Fn(zz,
(ZOLTAN_OBJ_SIZE_MULTI_FN *) fn, data);
break;
case ZOLTAN_PACK_OBJ_FN_TYPE:
ierr = Zoltan_Set_Pack_Obj_Fn(zz,
(ZOLTAN_PACK_OBJ_FN *) fn, data);
break;
case ZOLTAN_PACK_OBJ_MULTI_FN_TYPE:
ierr = Zoltan_Set_Pack_Obj_Multi_Fn(zz,
(ZOLTAN_PACK_OBJ_MULTI_FN *) fn, data);
break;
case ZOLTAN_UNPACK_OBJ_FN_TYPE:
ierr = Zoltan_Set_Unpack_Obj_Fn(zz,
(ZOLTAN_UNPACK_OBJ_FN *) fn, data);
break;
case ZOLTAN_UNPACK_OBJ_MULTI_FN_TYPE:
ierr = Zoltan_Set_Unpack_Obj_Multi_Fn(zz,
(ZOLTAN_UNPACK_OBJ_MULTI_FN *) fn, data);
break;
case ZOLTAN_NUM_COARSE_OBJ_FN_TYPE:
ierr = Zoltan_Set_Num_Coarse_Obj_Fn(zz,
(ZOLTAN_NUM_COARSE_OBJ_FN *) fn, data);
break;
case ZOLTAN_COARSE_OBJ_LIST_FN_TYPE:
ierr = Zoltan_Set_Coarse_Obj_List_Fn(zz,
(ZOLTAN_COARSE_OBJ_LIST_FN *) fn, data);
break;
case ZOLTAN_FIRST_COARSE_OBJ_FN_TYPE:
ierr = Zoltan_Set_First_Coarse_Obj_Fn(zz,
(ZOLTAN_FIRST_COARSE_OBJ_FN *) fn, data);
break;
case ZOLTAN_NEXT_COARSE_OBJ_FN_TYPE:
ierr = Zoltan_Set_Next_Coarse_Obj_Fn(zz,
(ZOLTAN_NEXT_COARSE_OBJ_FN *) fn, data);
break;
case ZOLTAN_NUM_CHILD_FN_TYPE:
ierr = Zoltan_Set_Num_Child_Fn(zz,
(ZOLTAN_NUM_CHILD_FN *) fn, data);
break;
case ZOLTAN_CHILD_LIST_FN_TYPE:
ierr = Zoltan_Set_Child_List_Fn(zz,
(ZOLTAN_CHILD_LIST_FN *) fn, data);
break;
case ZOLTAN_CHILD_WEIGHT_FN_TYPE:
ierr = Zoltan_Set_Child_Weight_Fn(zz,
(ZOLTAN_CHILD_WEIGHT_FN *) fn, data);
break;
case ZOLTAN_HG_SIZE_CS_FN_TYPE:
ierr = Zoltan_Set_HG_Size_CS_Fn(zz,
(ZOLTAN_HG_SIZE_CS_FN *) fn, data);
break;
case ZOLTAN_HG_CS_FN_TYPE:
ierr = Zoltan_Set_HG_CS_Fn(zz,
(ZOLTAN_HG_CS_FN *) fn, data);
break;
case ZOLTAN_HG_SIZE_EDGE_WTS_FN_TYPE:
ierr = Zoltan_Set_HG_Size_Edge_Wts_Fn(zz,
(ZOLTAN_HG_SIZE_EDGE_WTS_FN *) fn, data);
break;
case ZOLTAN_HG_EDGE_WTS_FN_TYPE:
ierr = Zoltan_Set_HG_Edge_Wts_Fn(zz,
(ZOLTAN_HG_EDGE_WTS_FN *) fn, data);
break;
case ZOLTAN_NUM_FIXED_OBJ_FN_TYPE:
ierr = Zoltan_Set_Num_Fixed_Obj_Fn(zz,
(ZOLTAN_NUM_FIXED_OBJ_FN *) fn, data);
break;
case ZOLTAN_FIXED_OBJ_LIST_FN_TYPE:
ierr = Zoltan_Set_Fixed_Obj_List_Fn(zz,
(ZOLTAN_FIXED_OBJ_LIST_FN *) fn, data);
break;
case ZOLTAN_HIER_NUM_LEVELS_FN_TYPE:
ierr = Zoltan_Set_Hier_Num_Levels_Fn(zz,
(ZOLTAN_HIER_NUM_LEVELS_FN *) fn, data);
break;
case ZOLTAN_HIER_PART_FN_TYPE:
ierr = Zoltan_Set_Hier_Part_Fn(zz,
(ZOLTAN_HIER_PART_FN *) fn, data);
break;
case ZOLTAN_HIER_METHOD_FN_TYPE:
ierr = Zoltan_Set_Hier_Method_Fn(zz,
(ZOLTAN_HIER_METHOD_FN *) fn, data);
break;
default:
sprintf(msg, "ZOLTAN_FN_TYPE %d is invalid.\n"
"Value must be in range 0 to %d.", fn_type, ZOLTAN_MAX_FN_TYPES);
ZOLTAN_PRINT_ERROR(zz->Proc, yo, msg);
ierr = ZOLTAN_WARN;
}
return (ierr);
}
int main(int argc, char *argv[])
{
int i, rc;
int myRank, numProcs;
float ver;
struct Zoltan_Struct *zz;
int changes, numGidEntries, numLidEntries, numImport, numExport, start_gid, num_nbors;
ZOLTAN_ID_PTR importGlobalGids, importLocalGids, exportGlobalGids, exportLocalGids;
int *importProcs, *importToPart, *exportProcs, *exportToPart;
int *parts=NULL;
ZOLTAN_ID_PTR lids=NULL;
FILE *fp;
struct Zoltan_DD_Struct *dd;
GRAPH_DATA myGraph;
int gid_length = 1; /* our global IDs consist of 1 integer */
int lid_length = 1; /* our local IDs consist of 1 integer */
/******************************************************************
** Initialize MPI and Zoltan
******************************************************************/
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &myRank);
MPI_Comm_size(MPI_COMM_WORLD, &numProcs);
rc = Zoltan_Initialize(argc, argv, &ver);
if (rc != ZOLTAN_OK){
printf("sorry...\n");
MPI_Finalize();
exit(0);
}
/******************************************************************
** Read graph from input file and distribute it
******************************************************************/
fp = fopen(fname, "r");
if (!fp){
if (myRank == 0) fprintf(stderr,"ERROR: Can not open %s\n",fname);
MPI_Finalize();
exit(1);
}
fclose(fp);
read_input_file(myRank, numProcs, fname, &myGraph);
/*fprintf(stderr,"%d have %d objects\n",myRank,myGraph.numMyVertices);*/
/******************************************************************
** Create a distributed data directory which maps vertex
** global IDs to their current partition number. We'll use this
** after migrating vertices, to update the partition in which
** our vertices neighbors are.
**
** Our local IDs (array "lids") are of type ZOLTAN_ID_TYPE because
** we are using Zoltan's distributed data directory. It assumes
** that a global ID is a sequence of "gid_length" ZOLTAN_ID_TYPEs.
** It assumes that a local ID is a sequence of "lid_length"
** ZOLTAN_ID_TYPEs.
******************************************************************/
rc = Zoltan_DD_Create(&dd, MPI_COMM_WORLD,
gid_length, /* length of a global ID */
lid_length, /* length of a local ID */
0, /* length of user data */
myGraph.numMyVertices, /* hash table size */
0); /* debug level */
parts = malloc(myGraph.numMyVertices * sizeof(int));
lids = malloc(myGraph.numMyVertices * sizeof(ZOLTAN_ID_TYPE));
for (i=0; i < myGraph.numMyVertices; i++){
parts[i] = myRank; /* part number of this vertex */
lids[i] = (ZOLTAN_ID_TYPE)i; /* local ID on my process for this vertex */
}
rc = Zoltan_DD_Update(dd,
myGraph.vertexGID,
lids,
NULL,
parts,
myGraph.numMyVertices);
myGraph.dd = dd;
/******************************************************************
** Create a Zoltan library structure for this instance of load
** balancing. Set the parameters and query functions that will
** govern the library's calculation. See the Zoltan User's
** Guide for the definition of these and many other parameters.
******************************************************************/
zz = Zoltan_Create(MPI_COMM_WORLD);
/* General parameters */
Zoltan_Set_Param(zz, "DEBUG_LEVEL", "0");
Zoltan_Set_Param(zz, "LB_METHOD", "GRAPH");
Zoltan_Set_Param(zz, "LB_APPROACH", "PARTITION");
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz, "RETURN_LISTS", "ALL");
/* Graph parameters */
Zoltan_Set_Param(zz, "CHECK_GRAPH", "2");
Zoltan_Set_Param(zz, "PHG_EDGE_SIZE_THRESHOLD", ".35"); /* 0-remove all, 1-remove none */
/* Query functions, defined in this source file */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_vertices, &myGraph);
Zoltan_Set_Obj_List_Fn(zz, get_vertex_list, &myGraph);
Zoltan_Set_Num_Edges_Multi_Fn(zz, get_num_edges_list, &myGraph);
Zoltan_Set_Edge_List_Multi_Fn(zz, get_edge_list, &myGraph);
Zoltan_Set_Obj_Size_Multi_Fn(zz, get_message_sizes,&myGraph);
Zoltan_Set_Pack_Obj_Multi_Fn(zz, pack_object_messages,&myGraph);
Zoltan_Set_Unpack_Obj_Multi_Fn(zz, unpack_object_messages,&myGraph);
Zoltan_Set_Mid_Migrate_PP_Fn(zz, mid_migrate,&myGraph);
/******************************************************************
** Visualize the graph partitioning before calling Zoltan.
******************************************************************/
if (myRank== 0){
printf("\nGraph partition before calling Zoltan\n");
}
showGraphPartitions(myRank, myGraph.dd);
/******************************************************************
** Zoltan can now partition the simple graph.
** In this simple example, we assume the number of partitions is
** equal to the number of processes. Process rank 0 will own
** partition 0, process rank 1 will own partition 1, and so on.
******************************************************************/
rc = Zoltan_LB_Partition(zz, /* input (all remaining fields are output) */
&changes, /* 1 if partitioning was changed, 0 otherwise */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
&numImport, /* Number of vertices to be sent to me */
&importGlobalGids, /* Global IDs of vertices to be sent to me */
&importLocalGids, /* Local IDs of vertices to be sent to me */
&importProcs, /* Process rank for source of each incoming vertex */
&importToPart, /* New partition for each incoming vertex */
&numExport, /* Number of vertices I must send to other processes*/
&exportGlobalGids, /* Global IDs of the vertices I must send */
&exportLocalGids, /* Local IDs of the vertices I must send */
&exportProcs, /* Process to which I send each of the vertices */
&exportToPart); /* Partition to which each vertex will belong */
if (rc != ZOLTAN_OK){
printf("sorry...\n");
MPI_Finalize();
Zoltan_Destroy(&zz);
exit(0);
}
/*fprintf(stderr,"%d export %d import %d\n",myRank,numExport,numImport);*/
/******************************************************************
** Update the data directory with the new partition numbers
******************************************************************/
for (i=0; i < numExport; i++){
parts[exportLocalGids[i]] = exportToPart[i];
}
rc = Zoltan_DD_Update(dd,
myGraph.vertexGID,
lids,
NULL,
parts,
myGraph.numMyVertices);
/******************************************************************
** Migrate vertices to new partitions
******************************************************************/
rc = Zoltan_Migrate(zz,
numImport, importGlobalGids, importLocalGids,
importProcs, importToPart,
numExport, exportGlobalGids, exportLocalGids,
exportProcs, exportToPart);
/******************************************************************
** Use the data dictionary to find neighbors' partitions
******************************************************************/
start_gid = myGraph.numMyVertices - numImport;
num_nbors = myGraph.nborIndex[myGraph.numMyVertices] - myGraph.nborIndex[start_gid];
rc = Zoltan_DD_Find(dd,
(ZOLTAN_ID_PTR)(myGraph.nborGID + start_gid), NULL, NULL,
myGraph.nborPart + start_gid, num_nbors, NULL);
/******************************************************************
** Visualize the graph partitioning after calling Zoltan.
******************************************************************/
if (myRank == 0){
printf("Graph partition after calling Zoltan\n");
}
showGraphPartitions(myRank, myGraph.dd);
/******************************************************************
** Free the arrays allocated by Zoltan_LB_Partition, and free
** the storage allocated for the Zoltan structure.
******************************************************************/
Zoltan_LB_Free_Part(&importGlobalGids, &importLocalGids,
&importProcs, &importToPart);
Zoltan_LB_Free_Part(&exportGlobalGids, &exportLocalGids,
&exportProcs, &exportToPart);
Zoltan_Destroy(&zz);
/**********************
** all done ***********
**********************/
MPI_Finalize();
if (myGraph.vertex_capacity > 0){
free(myGraph.vertexGID);
free(myGraph.nborIndex);
if (myGraph.nbor_capacity > 0){
free(myGraph.nborGID);
free(myGraph.nborPart);
}
}
if (parts) free(parts);
if (lids) free(lids);
return 0;
}
int MESH_PartitionWithZoltan(Mesh_ptr mesh, int nparts, int **part, int noptions,
char **options, MSTK_Comm comm) {
MEdge_ptr fedge;
MFace_ptr mf, oppf, rface;
MRegion_ptr mr, oppr;
List_ptr fedges, efaces, rfaces, fregions;
int i, j, k, id;
int nv, ne, nf, nr=0, nfe, nef, nfr, nrf, idx, idx2;
int numflag, nedgecut, ipos;
int wtflag;
int rc;
float ver;
struct Zoltan_Struct *zz;
GRAPH_DATA graph;
int changes, numGidEntries, numLidEntries, numImport, numExport;
ZOLTAN_ID_PTR importGlobalGids, importLocalGids, exportGlobalGids, exportLocalGids;
int *importProcs, *importToPart, *exportProcs, *exportToPart;
int rank;
MPI_Comm_rank(comm,&rank);
rc = Zoltan_Initialize(0, NULL, &ver);
if (rc != ZOLTAN_OK){
MSTK_Report("MESH_PartitionWithZoltan","Could not initialize Zoltan",MSTK_FATAL);
MPI_Finalize();
exit(0);
}
/******************************************************************
** Create a Zoltan library structure for this instance of partition
********************************************************************/
zz = Zoltan_Create(comm);
/*****************************************************************
** Figure out partitioning method
*****************************************************************/
char partition_method_str[32];
strcpy(partition_method_str,"RCB"); /* Default - Recursive Coordinate Bisection */
if (noptions) {
for (i = 0; i < noptions; i++) {
if (strncmp(options[i],"LB_PARTITION",12) == 0) {
char *result = NULL, instring[256];
strcpy(instring,options[i]);
result = strtok(instring,"=");
result = strtok(NULL," ");
strcpy(partition_method_str,result);
}
}
}
if (rank == 0) {
char mesg[256];
sprintf(mesg,"Using partitioning method %s for ZOLTAN\n",partition_method_str);
MSTK_Report("MESH_PartitionWithZoltan",mesg,MSTK_MESG);
}
/* General parameters for Zoltan */
Zoltan_Set_Param(zz, "DEBUG_LEVEL", "0");
Zoltan_Set_Param(zz, "LB_METHOD", partition_method_str);
Zoltan_Set_Param(zz, "LB_APPROACH", "PARTITION");
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz, "RETURN_LISTS", "ALL");
graph.numMyNodes = 0;
graph.numAllNbors = 0;
graph.nodeGID = NULL;
graph.nodeCoords = NULL;
graph.nborIndex = NULL;
graph.nborGID = NULL;
graph.nborProc = NULL;
if (strcmp(partition_method_str,"RCB") == 0) {
if (rank == 0) {
nr = MESH_Num_Regions(mesh);
nf = MESH_Num_Faces(mesh);
if (!nf && !nr)
MSTK_Report("MESH_PartitionWithZoltan","Cannot partition wire meshes",
MSTK_FATAL);
if (nr == 0) { /* Surface or planar mesh */
int ndim = 2; /* assume mesh is planar */
idx = 0;
MVertex_ptr mv;
while ((mv = MESH_Next_Vertex(mesh,&idx))) {
double vxyz[3];
MV_Coords(mv,vxyz);
if (vxyz[2] != 0.0) {
ndim = 3; /* non-planar or planar with non-zero z */
break;
}
}
NDIM_4_ZOLTAN = ndim-1; /* ignore last dimension to avoid partitioning in that dimension */
graph.numMyNodes = nf;
graph.nodeGID = (ZOLTAN_ID_TYPE *) malloc(sizeof(ZOLTAN_ID_TYPE) * nf);
graph.nodeCoords = (double *) malloc(sizeof(double) * NDIM_4_ZOLTAN * nf);
idx = 0;
while ((mf = MESH_Next_Face(mesh,&idx))) {
double fxyz[MAXPV2][3], cen[3];
int nfv;
MF_Coords(mf,&nfv,fxyz);
cen[0] = cen[1] = cen[2] = 0.0;
for (j = 0; j < nfv; j++)
for (k = 0; k < NDIM_4_ZOLTAN; k++)
cen[k] += fxyz[j][k];
for (k = 0; k < NDIM_4_ZOLTAN; k++) cen[k] /= nfv;
id = MF_ID(mf);
graph.nodeGID[id-1] = id;
memcpy(&(graph.nodeCoords[NDIM_4_ZOLTAN*(id-1)]),cen,NDIM_4_ZOLTAN*sizeof(double));
}
}
else { /* Volume mesh */
int ndim = 3;
NDIM_4_ZOLTAN = ndim-1; /* ignore last dimension to avoid partitioning in that dimension */
graph.numMyNodes = nr;
graph.nodeGID = (ZOLTAN_ID_TYPE *) malloc(sizeof(ZOLTAN_ID_TYPE) * nr);
graph.nodeCoords = (double *) malloc(sizeof(double) * NDIM_4_ZOLTAN * nr);
idx = 0;
while ((mr = MESH_Next_Region(mesh,&idx))) {
double rxyz[MAXPV3][3], cen[3];
int nrv;
MR_Coords(mr,&nrv,rxyz);
cen[0] = cen[1] = cen[2] = 0.0;
for (j = 0; j < nrv; j++)
for (k = 0; k < NDIM_4_ZOLTAN; k++)
cen[k] += rxyz[j][k];
for (k = 0; k < NDIM_4_ZOLTAN; k++) cen[k] /= nrv;
for (k = 0; k < NDIM_4_ZOLTAN; k++)
if (fabs(cen[k]) < 1.0e-10) cen[k] = 0.0;
id = MR_ID(mr);
graph.nodeGID[id-1] = id;
memcpy(&(graph.nodeCoords[NDIM_4_ZOLTAN*(id-1)]),cen,NDIM_4_ZOLTAN*sizeof(double));
}
}
}
MPI_Bcast(&NDIM_4_ZOLTAN,1,MPI_INT,0,comm);
/* Set some default values */
Zoltan_Set_Param(zz, "RCB_RECTILINEAR_BLOCKS","1");
// Zoltan_Set_Param(zz, "AVERAGE_CUTS", "1");
if (noptions > 1) {
for (i = 1; i < noptions; i++) {
char *paramstr = NULL, *valuestr = NULL, instring[256];
strcpy(instring,options[i]);
paramstr = strtok(instring,"=");
valuestr = strtok(NULL," ");
Zoltan_Set_Param(zz,paramstr,valuestr);
}
}
/* Query functions - defined in simpleQueries.h */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_nodes, &graph);
Zoltan_Set_Obj_List_Fn(zz, get_node_list, &graph);
Zoltan_Set_Num_Geom_Fn(zz, get_num_dimensions_reduced, &graph); /* reduced dimensions */
Zoltan_Set_Geom_Multi_Fn(zz, get_element_centers_reduced, &graph); /* reduced dimension centers */
}
else if (strcmp(partition_method_str,"GRAPH") == 0) {
if(rank == 0) {
nv = MESH_Num_Vertices(mesh);
ne = MESH_Num_Edges(mesh);
nf = MESH_Num_Faces(mesh);
nr = MESH_Num_Regions(mesh);
ipos = 0;
/* build nodes and neighbors list, similar as in partition with metis
Assign processor 0 the whole mesh, assign other processors a NULL mesh */
if (nr == 0) {
if (nf == 0) {
MSTK_Report("MESH_PartitionWithZoltan",
"Cannot partition wire meshes with Zoltan",MSTK_FATAL);
exit(-1);
}
graph.nodeGID = (ZOLTAN_ID_TYPE *)malloc(sizeof(ZOLTAN_ID_TYPE) * nf);
graph.nborIndex = (int *)malloc(sizeof(int) * (nf + 1));
graph.nborGID = (ZOLTAN_ID_TYPE *)malloc(sizeof(ZOLTAN_ID_TYPE) * 2*ne);
graph.nborProc = (int *)malloc(sizeof(int) * 2*ne);
graph.nborIndex[0] = 0;
/* Surface mesh */
idx = 0; i = 0;
while ((mf = MESH_Next_Face(mesh,&idx))) {
graph.nodeGID[i] = MF_ID(mf);
fedges = MF_Edges(mf,1,0);
nfe = List_Num_Entries(fedges);
idx2 = 0;
while ((fedge = List_Next_Entry(fedges,&idx2))) {
efaces = ME_Faces(fedge);
nef = List_Num_Entries(efaces);
if (nef == 1) {
continue; /* boundary edge; nothing to do */
} else {
int j;
for (j = 0; j < nef; j++) {
oppf = List_Entry(efaces,j);
if (oppf == mf) {
graph.nborGID[ipos] = MF_ID(oppf);
/* initially set all nodes on processor 0 */
graph.nborProc[ipos] = 0;
ipos++;
}
}
}
List_Delete(efaces);
}
List_Delete(fedges);
i++;
graph.nborIndex[i] = ipos;
}
graph.numMyNodes = i;
graph.numAllNbors = ipos;
}
else {
graph.nodeGID = (ZOLTAN_ID_TYPE *)malloc(sizeof(ZOLTAN_ID_TYPE) * nr);
graph.nborIndex = (int *)malloc(sizeof(int) * (nr + 1));
graph.nborGID = (ZOLTAN_ID_TYPE *)malloc(sizeof(ZOLTAN_ID_TYPE) * 2*nf);
graph.nborProc = (int *)malloc(sizeof(int) * 2*nf);
graph.nborIndex[0] = 0;
/* Volume mesh */
idx = 0; i = 0;
while ((mr = MESH_Next_Region(mesh,&idx))) {
graph.nodeGID[i] = MR_ID(mr);
rfaces = MR_Faces(mr);
nrf = List_Num_Entries(rfaces);
idx2 = 0;
while ((rface = List_Next_Entry(rfaces,&idx2))) {
fregions = MF_Regions(rface);
nfr = List_Num_Entries(fregions);
if (nfr > 1) {
oppr = List_Entry(fregions,0);
if (oppr == mr)
oppr = List_Entry(fregions,1);
graph.nborGID[ipos] = MR_ID(oppr);
/* initially set all nodes on processor 0 */
graph.nborProc[ipos] = 0;
ipos++;
}
List_Delete(fregions);
}
List_Delete(rfaces);
i++;
graph.nborIndex[i] = ipos;
}
graph.numMyNodes = i;
graph.numAllNbors = ipos;
}
}
/* Graph parameters */
/* Zoltan_Set_Param(zz, "CHECK_GRAPH", "2"); */
Zoltan_Set_Param(zz, "PHG_EDGE_SIZE_THRESHOLD", ".35"); /* 0-remove all, 1-remove none */
/* Query functions - defined in simpleQueries.h */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_nodes, &graph);
Zoltan_Set_Obj_List_Fn(zz, get_node_list, &graph);
Zoltan_Set_Num_Edges_Multi_Fn(zz, get_num_edges_list, &graph);
Zoltan_Set_Edge_List_Multi_Fn(zz, get_edge_list, &graph);
}
/* Partition the graph */
/******************************************************************
** Zoltan can now partition the graph.
** We assume the number of partitions is
** equal to the number of processes. Process rank 0 will own
** partition 0, process rank 1 will own partition 1, and so on.
******************************************************************/
rc = Zoltan_LB_Partition(zz, /* input (all remaining fields are output) */
&changes, /* 1 if partitioning was changed, 0 otherwise */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
&numImport, /* Number of nodes to be sent to me */
&importGlobalGids, /* Global IDs of nodes to be sent to me */
&importLocalGids, /* Local IDs of nodes to be sent to me */
&importProcs, /* Process rank for source of each incoming node */
&importToPart, /* New partition for each incoming node */
&numExport, /* Number of nodes I must send to other processes*/
&exportGlobalGids, /* Global IDs of the nodes I must send */
&exportLocalGids, /* Local IDs of the nodes I must send */
&exportProcs, /* Process to which I send each of the nodes */
&exportToPart); /* Partition to which each node will belong */
if (rc != ZOLTAN_OK){
if (rank == 0)
MSTK_Report("MESH_PartitionWithZoltan","Could not partition mesh with ZOLTAN",
MSTK_ERROR);
Zoltan_Destroy(&zz);
MPI_Finalize();
return 0;
}
if(rank == 0) {
*part = (int *) calloc(graph.numMyNodes,sizeof(int));
for ( i = 0; i < numExport; i++ ) {
(*part)[exportGlobalGids[i]-1] = exportToPart[i];
}
if (graph.nodeGID) free(graph.nodeGID);
if (graph.nodeCoords) free(graph.nodeCoords);
if (graph.nborIndex) free(graph.nborIndex);
if (graph.nborGID) free(graph.nborGID);
if (graph.nborProc) free(graph.nborProc);
}
else {
*part = NULL;
}
Zoltan_LB_Free_Part(&exportGlobalGids, &exportLocalGids, &exportProcs, &exportToPart);
Zoltan_LB_Free_Part(&importGlobalGids, &importLocalGids, &importProcs, &importToPart);
Zoltan_Destroy(&zz);
return 1;
}
int main(int argc, char *argv[])
{
int rc, do_hier, status;
float ver;
struct Zoltan_Struct *zz;
int changes, numGidEntries, numLidEntries, numImport, numExport;
int generate_files = 0;
char *platform=NULL, *topology=NULL;
char *graph_package=NULL;
ZOLTAN_ID_PTR importGlobalGids, importLocalGids, exportGlobalGids, exportLocalGids;
int *importProcs, *importToPart, *exportProcs, *exportToPart;
struct option opts[10];
double comm_time[10];
float cut_weight[3] = {0., 0., 0.};
long nvert=0;
char *debug_level=NULL;
status = 0;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &myRank);
MPI_Comm_size(MPI_COMM_WORLD, &numProcs);
Zoltan_Initialize(argc, argv, &ver);
zz = Zoltan_Create(MPI_COMM_WORLD);
/******************************************************************
** Check that this test makes sense.
******************************************************************/
if (sizeof(long) < sizeof(ZOLTAN_ID_TYPE)){
if (myRank == 0){
printf("ERROR: This code assumes that a long is at least %d bytes\n",(int)sizeof(ZOLTAN_ID_TYPE));
}
status = 1;
}
check_error_status(status, "configuration error");
/******************************************************************
** Initialize zoltan
******************************************************************/
/* options */
opts[0].name = "platform";
opts[0].has_arg = 1;
opts[0].flag = NULL;
opts[0].val = 1;
opts[1].name = "topology";
opts[1].has_arg = 1;
opts[1].flag = NULL;
opts[1].val = 2;
opts[2].name = "size";
opts[2].has_arg = 1;
opts[2].flag = NULL;
opts[2].val = 4;
opts[3].name = "verbose";
opts[3].has_arg = 0;
opts[3].flag = NULL;
opts[3].val = 5;
opts[4].name = "help";
opts[4].has_arg = 0;
opts[4].flag = NULL;
opts[4].val = 6;
opts[5].name = "graph_package";
opts[5].has_arg = 1;
opts[5].flag = NULL;
opts[5].val = 7;
opts[6].name = "generate_files";
opts[6].has_arg = 0;
opts[6].flag = NULL;
opts[6].val = 8;
opts[7].name = "debug_level";
opts[7].has_arg = 1;
opts[7].flag = NULL;
opts[7].val = 9;
opts[8].name = 0;
opts[8].has_arg = 0;
opts[8].flag = NULL;
opts[8].val = 0;
status = 0;
while (1){
rc = getopt_long_only(argc, argv, "", opts, NULL);
if (rc == '?'){
MPI_Barrier(MPI_COMM_WORLD);
if (myRank == 0) usage();
MPI_Finalize();
exit(0);
}
else if (rc == 1){
platform = optarg;
if (myRank == 0)
printf( "For platform %s\n",optarg );
}
else if (rc == 2){
topology = optarg;
if (myRank == 0)
printf( "For topology %s\n",optarg);
}
else if (rc == 7){
graph_package = optarg;
if (myRank == 0)
printf( "Zoltan parameter GRAPH_PACKAGE = %s\n",graph_package);
}
else if (rc == 8){
generate_files = 1;
if (myRank == 0)
printf( "Zoltan_Generate_Files will be called for each level.\n");
}
else if (rc == 4){
nvert = atol(optarg);
if (nvert < 1) status = 1;
check_error_status(status, "--size={approximate number of vertices}");
if (myRank == 0){
printf( "Graph will have approximately %ld vertices.\n",nvert);
}
}
else if (rc == 5){
verbose = 1;
}
else if (rc == 6){
if (myRank == 0) usage();
MPI_Finalize();
exit(0);
}
else if (rc == 9){
debug_level = optarg;
}
else if (rc <= 0){
break;
}
}
if ((platform==NULL) && (topology==NULL)){
if (myRank == 0)
fprintf(stdout,"No platform or topology, so we'll skip hierarchical partitioning\n");
do_hier = 0;
}
else if (graph_package == NULL){
if (myRank == 0)
fprintf(stdout,"No graph package, so we'll skip hierarchical partitioning\n");
do_hier = 0;
}
else{
do_hier = 1;
}
/* start */
Zoltan_Memory_Debug(0);
if (nvert > 0)
numGlobalVertices = nvert;
else
numGlobalVertices = NUM_GLOBAL_VERTICES;
status = create_a_graph();
check_error_status(status, "creating the graph");
Zoltan_Set_Param(zz, "DEBUG_LEVEL", "0");
Zoltan_Set_Param(zz, "REMAP", "0");
Zoltan_Set_Param(zz, "NUM_GID_ENTRIES", "1");
Zoltan_Set_Param(zz, "NUM_LID_ENTRIES", "1");
Zoltan_Set_Param(zz, "RETURN_LISTS", "ALL"); /* export AND import lists */
Zoltan_Set_Param(zz, "OBJ_WEIGHT_DIM", "1"); /* number of weights per vertex */
Zoltan_Set_Param(zz, "EDGE_WEIGHT_DIM", "1");/* number of weights per hyperedge */
Zoltan_Set_Num_Obj_Fn(zz, get_number_of_vertices, NULL);
Zoltan_Set_Obj_List_Fn(zz, get_vertex_list, NULL);
Zoltan_Set_Num_Edges_Multi_Fn(zz, get_num_edges_list, NULL);
Zoltan_Set_Edge_List_Multi_Fn(zz, get_edge_list, NULL);
/* GRAPH PARTITION */
Zoltan_Set_Param(zz, "LB_METHOD", "GRAPH");
Zoltan_Set_Param(zz, "LB_APPROACH", "PARTITION");
if (graph_package)
Zoltan_Set_Param(zz, "GRAPH_PACKAGE", graph_package);
if (verbose){
debug(zz, "Initial graph", 0);
}
if (generate_files){
rc = Zoltan_Generate_Files(zz, "flat", myRank, 0, 1, 0);
if (rc != ZOLTAN_OK) status = 1;
check_error_status(status, "Zoltan_Generate_Files");
}
/* Performance before partitioning */
time_communication(comm_time+0);
cut_weight[0] = get_edge_cut_weight(zz);
if (cut_weight[0] < 0.0) status = 1;
check_error_status(status, "First call to get_edge_cut_weight");
rc = Zoltan_LB_Partition(zz, /* input (all remaining fields are output) */
&changes, /* 1 if partitioning was changed, 0 otherwise */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
&numImport, /* Number of vertices to be sent to me */
&importGlobalGids, /* Global IDs of vertices to be sent to me */
&importLocalGids, /* Local IDs of vertices to be sent to me */
&importProcs, /* Process rank for source of each incoming vertex */
&importToPart, /* New partition for each incoming vertex */
&numExport, /* Number of vertices I must send to other processes*/
&exportGlobalGids, /* Global IDs of the vertices I must send */
&exportLocalGids, /* Local IDs of the vertices I must send */
&exportProcs, /* Process to which I send each of the vertices */
&exportToPart); /* Partition to which each vertex will belong */
if (rc != ZOLTAN_OK) status = 1;
check_error_status(status, "First call to LB_Partition");
status = migrate_graph(numExport, numImport, exportLocalGids, importGlobalGids);
check_error_status(status, "migration");
if (verbose){
debug(zz, "After flat partitioning and migration", 0);
}
time_communication(comm_time+1); /* With graph partitioning */
cut_weight[1] = get_edge_cut_weight(zz);
if (cut_weight[1] < 0.0) status = 1;
check_error_status(status, "Second call to get_edge_cut_weight");
Zoltan_LB_Free_Part(&importGlobalGids, &importLocalGids,
&importProcs, &importToPart);
Zoltan_LB_Free_Part(&exportGlobalGids, &exportLocalGids,
&exportProcs, &exportToPart);
if (do_hier){
/* HIERARCHICAL PARTITION */
free_graph();
status = create_a_graph();
check_error_status(status, "create graph for hierarchical partitioning");
Zoltan_Set_Param(zz, "LB_METHOD", "HIER");
Zoltan_Set_Param(zz, "HIER_ASSIST", "1");
if (generate_files){
Zoltan_Set_Param(zz, "HIER_GENERATE_FILES", "1");
}
if (debug_level) /* 1, 2 or 3 */
Zoltan_Set_Param(zz, "HIER_DEBUG_LEVEL", debug_level);
else
Zoltan_Set_Param(zz, "HIER_DEBUG_LEVEL", "0");
/* TODO: Suppose graph is not symmetric, and we request SYMMETRIZE. Do we still get
* a "good" answer when each sub-graph in the hierarchy is symmetrized?
*/
if (topology)
Zoltan_Set_Param(zz, "TOPOLOGY", topology);
else if (platform)
Zoltan_Set_Param(zz, "PLATFORM", platform);
rc = Zoltan_LB_Partition(zz, /* input (all remaining fields are output) */
&changes, /* 1 if partitioning was changed, 0 otherwise */
&numGidEntries, /* Number of integers used for a global ID */
&numLidEntries, /* Number of integers used for a local ID */
&numImport, /* Number of vertices to be sent to me */
&importGlobalGids, /* Global IDs of vertices to be sent to me */
&importLocalGids, /* Local IDs of vertices to be sent to me */
&importProcs, /* Process rank for source of each incoming vertex */
&importToPart, /* New partition for each incoming vertex */
&numExport, /* Number of vertices I must send to other processes*/
&exportGlobalGids, /* Global IDs of the vertices I must send */
&exportLocalGids, /* Local IDs of the vertices I must send */
&exportProcs, /* Process to which I send each of the vertices */
&exportToPart); /* Partition to which each vertex will belong */
if (rc != ZOLTAN_OK) status = 1;
check_error_status(status, "Second call to LB_Partition");
status = migrate_graph(numExport, numImport, exportLocalGids, importGlobalGids);
check_error_status(status, "second migration");
if (verbose){
debug(zz, "After hierarchical partitioning and migration", 0);
}
time_communication(comm_time+2); /* With hierarchical graph partitioning */
cut_weight[2] = get_edge_cut_weight(zz);
if (cut_weight[2] < 0.0) status = 1;
check_error_status(status, "Third call to get_edge_cut_weight");
Zoltan_LB_Free_Part(&importGlobalGids, &importLocalGids,
&importProcs, &importToPart);
Zoltan_LB_Free_Part(&exportGlobalGids, &exportLocalGids,
&exportProcs, &exportToPart);
}
Zoltan_Destroy(&zz);
free_graph();
if (myRank == 0){
fprintf(stdout,"Graph cut weight before partitioning: %f\n",cut_weight[0]);
fprintf(stdout," after flat partitioning: %f\n",cut_weight[1]);
if (do_hier)
fprintf(stdout," after hierarchical partitioning: %f\n",cut_weight[2]);
fflush(stdout);
}
if (cut_weight[1] >= cut_weight[0]){
status = 1;
if (zz->Proc == 0){
fprintf(stderr,"FAILED: No improvement shown in flat partitioning");
}
}
if (do_hier && (cut_weight[2] > cut_weight[0])){
status = 1;
if (zz->Proc == 0){
fprintf(stderr,"FAILED: No improvement shown in hierarchical partitioning");
}
}
MPI_Finalize();
return status;
}
