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/*
* Copyright 1994-2011, Regents of the University of Minnesota
*
* mpmetis.c
*
* Drivers for the mesh partitioning routines
*
* Started 8/28/94
* George
*
* $Id: mpmetis.c 10567 2011-07-13 16:17:07Z karypis $
*
*/
#include "metisbin.h"
/*************************************************************************/
/*! Let the game begin! */
/*************************************************************************/
int main(int argc, char *argv[])
{
idx_t options[METIS_NOPTIONS];
mesh_t *mesh;
idx_t *epart, *npart;
idx_t objval;
params_t *params;
int status=0;
params = parse_cmdline(argc, argv);
gk_startcputimer(params->iotimer);
mesh = ReadMesh(params);
if (mesh->ncon > 1) {
printf("*** Meshes with more than one balancing constraint are not supported yet.\n");
exit(0);
}
ReadTPwgts(params, mesh->ncon);
gk_stopcputimer(params->iotimer);
MPPrintInfo(params, mesh);
epart = imalloc(mesh->ne, "main: epart");
npart = imalloc(mesh->nn, "main: npart");
METIS_SetDefaultOptions(options);
options[METIS_OPTION_PTYPE] = params->ptype;
options[METIS_OPTION_OBJTYPE] = params->objtype;
options[METIS_OPTION_CTYPE] = params->ctype;
options[METIS_OPTION_IPTYPE] = params->iptype;
options[METIS_OPTION_RTYPE] = params->rtype;
options[METIS_OPTION_DBGLVL] = params->dbglvl;
options[METIS_OPTION_UFACTOR] = params->ufactor;
options[METIS_OPTION_MINCONN] = params->minconn;
options[METIS_OPTION_CONTIG] = params->contig;
options[METIS_OPTION_SEED] = params->seed;
options[METIS_OPTION_NITER] = params->niter;
options[METIS_OPTION_NCUTS] = params->ncuts;
gk_malloc_init();
gk_startcputimer(params->parttimer);
switch (params->gtype) {
case METIS_GTYPE_DUAL:
status = METIS_PartMeshDual(&mesh->ne, &mesh->nn, mesh->eptr, mesh->eind,
mesh->ewgt, NULL, ¶ms->ncommon, ¶ms->nparts,
params->tpwgts, options, &objval, epart, npart);
break;
case METIS_GTYPE_NODAL:
status = METIS_PartMeshNodal(&mesh->ne, &mesh->nn, mesh->eptr, mesh->eind,
NULL, NULL, ¶ms->nparts, params->tpwgts, options, &objval,
epart, npart);
break;
}
gk_stopcputimer(params->parttimer);
if (gk_GetCurMemoryUsed() != 0)
printf("***It seems that Metis did not free all of its memory! Report this.\n");
params->maxmemory = gk_GetMaxMemoryUsed();
gk_malloc_cleanup(0);
if (status != METIS_OK) {
printf("\n***Metis returned with an error.\n");
}
else {
if (!params->nooutput) {
/* Write the solution */
gk_startcputimer(params->iotimer);
WriteMeshPartition(params->filename, params->nparts, mesh->ne, epart, mesh->nn, npart);
gk_stopcputimer(params->iotimer);
}
MPReportResults(params, mesh, epart, npart, objval);
}
FreeMesh(&mesh);
gk_free((void **)&epart, &npart, LTERM);
gk_free((void **)¶ms->filename, ¶ms->tpwgtsfile, ¶ms->tpwgts,
¶ms->ubvecstr, ¶ms->ubvec, ¶ms, LTERM);
}
/*************************************************************************/
/*! This function prints run parameters */
/*************************************************************************/
void MPPrintInfo(params_t *params, mesh_t *mesh)
{
if (params->ufactor == -1) {
if (params->ptype == METIS_PTYPE_KWAY)
params->ufactor = KMETIS_DEFAULT_UFACTOR;
else
params->ufactor = PMETIS_DEFAULT_UFACTOR;
}
printf("******************************************************************************\n");
printf("%s", METISTITLE);
printf(" (HEAD: %s, Built on: %s, %s)\n", SVNINFO, __DATE__, __TIME__);
printf(" size of idx_t: %zubits, real_t: %zubits, idx_t *: %zubits\n",
8*sizeof(idx_t), 8*sizeof(real_t), 8*sizeof(idx_t *));
printf("\n");
printf("Mesh Information ------------------------------------------------------------\n");
printf(" Name: %s, #Elements: %"PRIDX", #Nodes: %"PRIDX", #Parts: %"PRIDX"\n",
params->filename, mesh->ne, mesh->nn, params->nparts);
if (mesh->ncon > 1)
printf(" Balancing Constraints: %"PRIDX"\n", mesh->ncon);
printf("\n");
printf("Options ---------------------------------------------------------------------\n");
printf(" ptype=%s, objtype=%s, ctype=%s, rtype=%s, iptype=%s\n",
ptypenames[params->ptype], objtypenames[params->objtype], ctypenames[params->ctype],
rtypenames[params->rtype], iptypenames[params->iptype]);
printf(" dbglvl=%"PRIDX", ufactor=%.3f, minconn=%s, contig=%s, nooutput=%s\n",
params->dbglvl,
I2RUBFACTOR(params->ufactor),
(params->minconn ? "YES" : "NO"),
(params->contig ? "YES" : "NO"),
(params->nooutput ? "YES" : "NO")
);
printf(" seed=%"PRIDX", niter=%"PRIDX", ncuts=%"PRIDX"\n",
params->seed, params->niter, params->ncuts);
printf(" gtype=%s, ncommon=%"PRIDX", niter=%"PRIDX", ncuts=%"PRIDX"\n",
gtypenames[params->gtype], params->ncommon, params->niter, params->ncuts);
printf("\n");
switch (params->ptype) {
case METIS_PTYPE_RB:
printf("Recursive Partitioning ------------------------------------------------------\n");
break;
case METIS_PTYPE_KWAY:
printf("Direct k-way Partitioning ---------------------------------------------------\n");
break;
}
}
/*************************************************************************/
/*! This function does any post-partitioning reporting */
/*************************************************************************/
void MPReportResults(params_t *params, mesh_t *mesh, idx_t *epart, idx_t *npart,
idx_t objval)
{
gk_startcputimer(params->reporttimer);
/* ComputePartitionInfo(params, graph, part); */
printf(" - %s: %"PRIDX".\n\n",
(params->objtype == METIS_OBJTYPE_CUT ? "Edgecut" : "Volume"), objval);
gk_stopcputimer(params->reporttimer);
printf("\nTiming Information ----------------------------------------------------------\n");
printf(" I/O: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->iotimer));
printf(" Partitioning: \t\t %7.3"PRREAL" sec (METIS time)\n", gk_getcputimer(params->parttimer));
printf(" Reporting: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->reporttimer));
printf("\nMemory Information ----------------------------------------------------------\n");
printf(" Max memory used:\t\t %7.3"PRREAL" MB\n", (real_t)(params->maxmemory/(1024.0*1024.0)));
printf("******************************************************************************\n");
}
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