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* Copyright 1994-2011, Regents of the University of Minnesota
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* Drivers for the mesh partitioning routines
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* $Id: mpmetis.c 10567 2011-07-13 16:17:07Z karypis $
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/*************************************************************************/
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/*! Let the game begin! */
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/*************************************************************************/
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int main(int argc, char *argv[])
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idx_t options[METIS_NOPTIONS];
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params = parse_cmdline(argc, argv);
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gk_startcputimer(params->iotimer);
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mesh = ReadMesh(params);
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printf("*** Meshes with more than one balancing constraint are not supported yet.\n");
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ReadTPwgts(params, mesh->ncon);
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gk_stopcputimer(params->iotimer);
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MPPrintInfo(params, mesh);
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epart = imalloc(mesh->ne, "main: epart");
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npart = imalloc(mesh->nn, "main: npart");
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METIS_SetDefaultOptions(options);
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options[METIS_OPTION_PTYPE] = params->ptype;
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options[METIS_OPTION_OBJTYPE] = params->objtype;
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options[METIS_OPTION_CTYPE] = params->ctype;
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options[METIS_OPTION_IPTYPE] = params->iptype;
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options[METIS_OPTION_RTYPE] = params->rtype;
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options[METIS_OPTION_DBGLVL] = params->dbglvl;
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options[METIS_OPTION_UFACTOR] = params->ufactor;
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options[METIS_OPTION_MINCONN] = params->minconn;
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options[METIS_OPTION_CONTIG] = params->contig;
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options[METIS_OPTION_SEED] = params->seed;
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options[METIS_OPTION_NITER] = params->niter;
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options[METIS_OPTION_NCUTS] = params->ncuts;
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gk_startcputimer(params->parttimer);
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switch (params->gtype) {
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case METIS_GTYPE_DUAL:
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status = METIS_PartMeshDual(&mesh->ne, &mesh->nn, mesh->eptr, mesh->eind,
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mesh->ewgt, NULL, ¶ms->ncommon, ¶ms->nparts,
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params->tpwgts, options, &objval, epart, npart);
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case METIS_GTYPE_NODAL:
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status = METIS_PartMeshNodal(&mesh->ne, &mesh->nn, mesh->eptr, mesh->eind,
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NULL, NULL, ¶ms->nparts, params->tpwgts, options, &objval,
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gk_stopcputimer(params->parttimer);
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if (gk_GetCurMemoryUsed() != 0)
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printf("***It seems that Metis did not free all of its memory! Report this.\n");
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params->maxmemory = gk_GetMaxMemoryUsed();
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if (status != METIS_OK) {
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printf("\n***Metis returned with an error.\n");
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if (!params->nooutput) {
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/* Write the solution */
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gk_startcputimer(params->iotimer);
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WriteMeshPartition(params->filename, params->nparts, mesh->ne, epart, mesh->nn, npart);
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gk_stopcputimer(params->iotimer);
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MPReportResults(params, mesh, epart, npart, objval);
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gk_free((void **)&epart, &npart, LTERM);
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gk_free((void **)¶ms->filename, ¶ms->tpwgtsfile, ¶ms->tpwgts,
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¶ms->ubvecstr, ¶ms->ubvec, ¶ms, LTERM);
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/*************************************************************************/
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/*! This function prints run parameters */
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/*************************************************************************/
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void MPPrintInfo(params_t *params, mesh_t *mesh)
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if (params->ufactor == -1) {
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if (params->ptype == METIS_PTYPE_KWAY)
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params->ufactor = KMETIS_DEFAULT_UFACTOR;
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params->ufactor = PMETIS_DEFAULT_UFACTOR;
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printf("******************************************************************************\n");
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printf("%s", METISTITLE);
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printf(" (HEAD: %s, Built on: %s, %s)\n", SVNINFO, __DATE__, __TIME__);
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printf(" size of idx_t: %zubits, real_t: %zubits, idx_t *: %zubits\n",
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8*sizeof(idx_t), 8*sizeof(real_t), 8*sizeof(idx_t *));
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printf("Mesh Information ------------------------------------------------------------\n");
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printf(" Name: %s, #Elements: %"PRIDX", #Nodes: %"PRIDX", #Parts: %"PRIDX"\n",
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params->filename, mesh->ne, mesh->nn, params->nparts);
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printf(" Balancing Constraints: %"PRIDX"\n", mesh->ncon);
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printf("Options ---------------------------------------------------------------------\n");
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printf(" ptype=%s, objtype=%s, ctype=%s, rtype=%s, iptype=%s\n",
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ptypenames[params->ptype], objtypenames[params->objtype], ctypenames[params->ctype],
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rtypenames[params->rtype], iptypenames[params->iptype]);
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printf(" dbglvl=%"PRIDX", ufactor=%.3f, minconn=%s, contig=%s, nooutput=%s\n",
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I2RUBFACTOR(params->ufactor),
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(params->minconn ? "YES" : "NO"),
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(params->contig ? "YES" : "NO"),
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(params->nooutput ? "YES" : "NO")
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printf(" seed=%"PRIDX", niter=%"PRIDX", ncuts=%"PRIDX"\n",
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params->seed, params->niter, params->ncuts);
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printf(" gtype=%s, ncommon=%"PRIDX", niter=%"PRIDX", ncuts=%"PRIDX"\n",
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gtypenames[params->gtype], params->ncommon, params->niter, params->ncuts);
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switch (params->ptype) {
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printf("Recursive Partitioning ------------------------------------------------------\n");
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case METIS_PTYPE_KWAY:
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printf("Direct k-way Partitioning ---------------------------------------------------\n");
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/*************************************************************************/
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/*! This function does any post-partitioning reporting */
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/*************************************************************************/
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void MPReportResults(params_t *params, mesh_t *mesh, idx_t *epart, idx_t *npart,
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gk_startcputimer(params->reporttimer);
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/* ComputePartitionInfo(params, graph, part); */
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printf(" - %s: %"PRIDX".\n\n",
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(params->objtype == METIS_OBJTYPE_CUT ? "Edgecut" : "Volume"), objval);
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gk_stopcputimer(params->reporttimer);
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printf("\nTiming Information ----------------------------------------------------------\n");
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printf(" I/O: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->iotimer));
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printf(" Partitioning: \t\t %7.3"PRREAL" sec (METIS time)\n", gk_getcputimer(params->parttimer));
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printf(" Reporting: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->reporttimer));
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printf("\nMemory Information ----------------------------------------------------------\n");
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printf(" Max memory used:\t\t %7.3"PRREAL" MB\n", (real_t)(params->maxmemory/(1024.0*1024.0)));
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printf("******************************************************************************\n");