void Refine2Way(ctrl_t *ctrl, graph_t *orggraph, graph_t *graph, real_t *tpwgts)
{
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->UncoarsenTmr));
/* Compute the parameters of the coarsest graph */
Compute2WayPartitionParams(ctrl, graph);
for (;;) {
ASSERT(CheckBnd(graph));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->RefTmr));
Balance2Way(ctrl, graph, tpwgts);
FM_2WayRefine(ctrl, graph, tpwgts, ctrl->niter);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->RefTmr));
if (graph == orggraph)
break;
graph = graph->finer;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->ProjectTmr));
Project2WayPartition(ctrl, graph);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->ProjectTmr));
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->UncoarsenTmr));
}
void BDFReportResults(params_t *params, bigraph_t *bigraph)
{
gk_startcputimer(params->reporttimer);
gk_stopcputimer(params->reporttimer);
printf("\nTiming Information ----------------------------------------------------------\n");
printf(" I/O: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->iotimer));
printf(" Ordering: \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(" Partitioning: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(_parttimer));
printf(" NZStating: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(_nztimer));
printf("\nMemory Information ----------------------------------------------------------\n");
printf(" Max memory used:\t\t %7.3"PRREAL" MB\n", (real_t)(params->maxmemory/(1024.0*1024.0)));
printf("\nHeuristic Information -------------------------------------------------------\n");
printf(" TotalCheck: \t\t %"PRIDX"\n", _totalcheck);
printf(" FirstHit: \t\t %"PRIDX"\n", _firsthit);
printf(" FirstHitRate: \t\t %7.3"PRREAL"\n", (_totalcheck == 0 ? 1 : (real_t)1.0*_firsthit/_totalcheck));
printf(" MaxArea: \t\t %"PRIDX"\n", _maxarea);
printf(" MaxNonZeros: \t\t %"PRIDX"\n", _maxnz);
printf(" MinArea: \t\t %"PRIDX"\n", _minarea);
printf(" MinNonZeors: \t\t %"PRIDX"\n", _minnz);
printf(" AvgArea: \t\t %7.3"PRREAL"\n", _avgarea);
printf(" AvgNz: \t\t %7.3"PRREAL"\n", _avgnz);
printf(" MaxDense: \t\t %7.6"PRREAL"\n", _maxdense);
printf(" MinDense: \t\t %7.6"PRREAL"\n", _mindense);
printf("******************************************************************************\n");
}
/*************************************************************************
* This function computes the initial bisection of the coarsest graph
**************************************************************************/
void MocInit2WayPartition2(CtrlType *ctrl, GraphType *graph, float *tpwgts, float *ubvec)
{
idxtype dbglvl;
dbglvl = ctrl->dbglvl;
IFSET(ctrl->dbglvl, DBG_REFINE, ctrl->dbglvl -= DBG_REFINE);
IFSET(ctrl->dbglvl, DBG_MOVEINFO, ctrl->dbglvl -= DBG_MOVEINFO);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
switch (ctrl->IType) {
case ITYPE_GGPKL:
case ITYPE_RANDOM:
MocGrowBisection2(ctrl, graph, tpwgts, ubvec);
break;
case 3:
MocGrowBisectionNew2(ctrl, graph, tpwgts, ubvec);
break;
default:
errexit("Unknown initial partition type: %d\n", ctrl->IType);
}
IFSET(ctrl->dbglvl, DBG_IPART, mprintf("Initial Cut: %D\n", graph->mincut));
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
ctrl->dbglvl = dbglvl;
}
/*************************************************************************
* This function takes a graph and produces a bisection of it
**************************************************************************/
idxtype MlevelKWayPartitioning(CtrlType *ctrl, GraphType *graph, idxtype nparts, idxtype *part, float *tpwgts, float ubfactor)
{
idxtype i, j, nvtxs, tvwgt, tpwgts2[2];
GraphType *cgraph;
idxtype wgtflag=3, numflag=0, options[10], edgecut;
cgraph = Coarsen2Way(ctrl, graph);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
AllocateKWayPartitionMemory(ctrl, cgraph, nparts);
options[0] = 1;
options[OPTION_CTYPE] = MTYPE_SHEMKWAY;
options[OPTION_ITYPE] = ITYPE_GGPKL;
options[OPTION_RTYPE] = RTYPE_FM;
options[OPTION_DBGLVL] = 0;
METIS_WPartGraphRecursive(&cgraph->nvtxs, cgraph->xadj, cgraph->adjncy, cgraph->vwgt,
cgraph->adjwgt, &wgtflag, &numflag, &nparts, tpwgts, options,
&edgecut, cgraph->where);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
IFSET(ctrl->dbglvl, DBG_IPART, mprintf("Initial %D-way partitioning cut: %D\n", nparts, edgecut));
IFSET(ctrl->dbglvl, DBG_KWAYPINFO, ComputePartitionInfo(cgraph, nparts, cgraph->where));
RefineKWay(ctrl, graph, cgraph, nparts, tpwgts, ubfactor);
idxcopy(graph->nvtxs, graph->where, part);
FreeGraph(graph, 0);
return graph->mincut;
}
/*************************************************************************
* This function computes the initial bisection of the coarsest graph
**************************************************************************/
void Init2WayPartition(CtrlType *ctrl, GraphType *graph, idxtype *tpwgts, float ubfactor)
{
idxtype dbglvl;
dbglvl = ctrl->dbglvl;
IFSET(ctrl->dbglvl, DBG_REFINE, ctrl->dbglvl -= DBG_REFINE);
IFSET(ctrl->dbglvl, DBG_MOVEINFO, ctrl->dbglvl -= DBG_MOVEINFO);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
switch (ctrl->IType) {
case ITYPE_GGPKL:
if (graph->nedges == 0)
RandomBisection(ctrl, graph, tpwgts, ubfactor);
else
GrowBisection(ctrl, graph, tpwgts, ubfactor);
break;
case ITYPE_RANDOM:
RandomBisection(ctrl, graph, tpwgts, ubfactor);
break;
default:
errexit("Unknown initial partition type: %d\n", ctrl->IType);
}
IFSET(ctrl->dbglvl, DBG_IPART, mprintf("Initial Cut: %D\n", graph->mincut));
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
ctrl->dbglvl = dbglvl;
/*
IsConnectedSubdomain(ctrl, graph, 0);
IsConnectedSubdomain(ctrl, graph, 1);
*/
}
/*************************************************************************
* This function is the entry point of refinement
**************************************************************************/
void MocRefine2Way(CtrlType *ctrl, GraphType *orggraph, GraphType *graph, float *tpwgts, float ubfactor)
{
idxtype i;
float tubvec[MAXNCON];
for (i=0; i<graph->ncon; i++)
tubvec[i] = 1.0;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->UncoarsenTmr));
/* Compute the parameters of the coarsest graph */
MocCompute2WayPartitionParams(ctrl, graph);
for (;;) {
ASSERT(CheckBnd(graph));
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->RefTmr));
switch (ctrl->RType) {
case RTYPE_FM:
MocBalance2Way(ctrl, graph, tpwgts, 1.03);
MocFM_2WayEdgeRefine(ctrl, graph, tpwgts, 8);
break;
case 2:
MocBalance2Way(ctrl, graph, tpwgts, 1.03);
MocFM_2WayEdgeRefine2(ctrl, graph, tpwgts, tubvec, 8);
break;
default:
errexit("Unknown refinement type: %d\n", ctrl->RType);
}
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->RefTmr));
if (graph == orggraph)
break;
graph = graph->finer;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->ProjectTmr));
MocProject2WayPartition(ctrl, graph);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->ProjectTmr));
}
MocBalance2Way(ctrl, graph, tpwgts, 1.01);
MocFM_2WayEdgeRefine(ctrl, graph, tpwgts, 8);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->UncoarsenTmr));
}
/*************************************************************************
* This function is the entry point for PWMETIS that accepts exact weights
* for the target partitions
**************************************************************************/
void METIS_WPartGraphRecursive(idxtype *nvtxs, idxtype *xadj, idxtype *adjncy, idxtype *vwgt,
idxtype *adjwgt, idxtype *wgtflag, idxtype *numflag, idxtype *nparts,
float *tpwgts, idxtype *options, idxtype *edgecut, idxtype *part)
{
idxtype i, j;
GraphType graph;
CtrlType ctrl;
float *mytpwgts;
if (*numflag == 1)
Change2CNumbering(*nvtxs, xadj, adjncy);
SetUpGraph(&graph, OP_PMETIS, *nvtxs, 1, xadj, adjncy, vwgt, adjwgt, *wgtflag);
if (options[0] == 0) { /* Use the default parameters */
ctrl.CType = PMETIS_CTYPE;
ctrl.IType = PMETIS_ITYPE;
ctrl.RType = PMETIS_RTYPE;
ctrl.dbglvl = PMETIS_DBGLVL;
}
else {
ctrl.CType = options[OPTION_CTYPE];
ctrl.IType = options[OPTION_ITYPE];
ctrl.RType = options[OPTION_RTYPE];
ctrl.dbglvl = options[OPTION_DBGLVL];
}
ctrl.optype = OP_PMETIS;
ctrl.CoarsenTo = 20;
ctrl.maxvwgt = 1.5*(idxsum(*nvtxs, graph.vwgt, 1)/ctrl.CoarsenTo);
mytpwgts = gk_fmalloc(*nparts, "PWMETIS: mytpwgts");
for (i=0; i<*nparts; i++)
mytpwgts[i] = tpwgts[i];
InitRandom(-1);
AllocateWorkSpace(&ctrl, &graph, *nparts);
IFSET(ctrl.dbglvl, DBG_TIME, InitTimers(&ctrl));
IFSET(ctrl.dbglvl, DBG_TIME, gk_startcputimer(ctrl.TotalTmr));
*edgecut = MlevelRecursiveBisection(&ctrl, &graph, *nparts, part, mytpwgts, 1.000, 0);
IFSET(ctrl.dbglvl, DBG_TIME, gk_stopcputimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
FreeWorkSpace(&ctrl, &graph);
gk_free((void **)&mytpwgts, LTERM);
if (*numflag == 1)
Change2FNumbering(*nvtxs, xadj, adjncy, part);
}
void Refine2WayNode(ctrl_t *ctrl, graph_t *orggraph, graph_t *graph)
{
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->UncoarsenTmr));
if (graph == orggraph) {
Compute2WayNodePartitionParams(ctrl, graph);
}
else {
do {
graph = graph->finer;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->ProjectTmr));
Project2WayNodePartition(ctrl, graph);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->ProjectTmr));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->RefTmr));
FM_2WayNodeBalance(ctrl, graph);
ASSERT(CheckNodePartitionParams(graph));
switch (ctrl->rtype) {
case METIS_RTYPE_SEP2SIDED:
FM_2WayNodeRefine2Sided(ctrl, graph, ctrl->niter);
break;
case METIS_RTYPE_SEP1SIDED:
FM_2WayNodeRefine1Sided(ctrl, graph, ctrl->niter);
break;
default:
gk_errexit(SIGERR, "Unknown rtype of %d\n", ctrl->rtype);
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->RefTmr));
} while (graph != orggraph);
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->UncoarsenTmr));
}
/*************************************************************************
* This function is the entry point for KWMETIS
**************************************************************************/
void METIS_mCPartGraphKway(idxtype *nvtxs, idxtype *ncon, idxtype *xadj, idxtype *adjncy,
idxtype *vwgt, idxtype *adjwgt, idxtype *wgtflag, idxtype *numflag,
idxtype *nparts, float *rubvec, idxtype *options, idxtype *edgecut,
idxtype *part)
{
idxtype i, j;
GraphType graph;
CtrlType ctrl;
if (*numflag == 1)
Change2CNumbering(*nvtxs, xadj, adjncy);
SetUpGraph(&graph, OP_KMETIS, *nvtxs, *ncon, xadj, adjncy, vwgt, adjwgt, *wgtflag);
if (options[0] == 0) { /* Use the default parameters */
ctrl.CType = McKMETIS_CTYPE;
ctrl.IType = McKMETIS_ITYPE;
ctrl.RType = McKMETIS_RTYPE;
ctrl.dbglvl = McKMETIS_DBGLVL;
}
else {
ctrl.CType = options[OPTION_CTYPE];
ctrl.IType = options[OPTION_ITYPE];
ctrl.RType = options[OPTION_RTYPE];
ctrl.dbglvl = options[OPTION_DBGLVL];
}
ctrl.optype = OP_KMETIS;
ctrl.CoarsenTo = amax((*nvtxs)/(20*gk_log2(*nparts)), 30*(*nparts));
ctrl.nmaxvwgt = 1.5/(1.0*ctrl.CoarsenTo);
InitRandom(-1);
AllocateWorkSpace(&ctrl, &graph, *nparts);
IFSET(ctrl.dbglvl, DBG_TIME, InitTimers(&ctrl));
IFSET(ctrl.dbglvl, DBG_TIME, gk_startcputimer(ctrl.TotalTmr));
*edgecut = MCMlevelKWayPartitioning(&ctrl, &graph, *nparts, part, rubvec);
IFSET(ctrl.dbglvl, DBG_TIME, gk_stopcputimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
FreeWorkSpace(&ctrl, &graph);
if (*numflag == 1)
Change2FNumbering(*nvtxs, xadj, adjncy, part);
}
/*************************************************************************
* This function takes a graph and produces a bisection of it
**************************************************************************/
idxtype MCMlevelKWayPartitioning(CtrlType *ctrl, GraphType *graph, idxtype nparts, idxtype *part,
float *rubvec)
{
idxtype i, j, nvtxs;
GraphType *cgraph;
idxtype options[10], edgecut;
cgraph = MCCoarsen2Way(ctrl, graph);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
MocAllocateKWayPartitionMemory(ctrl, cgraph, nparts);
options[0] = 1;
options[OPTION_CTYPE] = MTYPE_SBHEM_INFNORM;
options[OPTION_ITYPE] = ITYPE_RANDOM;
options[OPTION_RTYPE] = RTYPE_FM;
options[OPTION_DBGLVL] = 0;
/* Determine what you will use as the initial partitioner, based on tolerances */
for (i=0; i<graph->ncon; i++) {
if (rubvec[i] > 1.2)
break;
}
if (i == graph->ncon)
METIS_mCPartGraphRecursiveInternal(&cgraph->nvtxs, &cgraph->ncon,
cgraph->xadj, cgraph->adjncy, cgraph->nvwgt, cgraph->adjwgt, &nparts,
options, &edgecut, cgraph->where);
else
METIS_mCHPartGraphRecursiveInternal(&cgraph->nvtxs, &cgraph->ncon,
cgraph->xadj, cgraph->adjncy, cgraph->nvwgt, cgraph->adjwgt, &nparts,
rubvec, options, &edgecut, cgraph->where);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
IFSET(ctrl->dbglvl, DBG_IPART, mprintf("Initial %D-way partitioning cut: %D\n", nparts, edgecut));
IFSET(ctrl->dbglvl, DBG_KWAYPINFO, ComputePartitionInfo(cgraph, nparts, cgraph->where));
MocRefineKWayHorizontal(ctrl, graph, cgraph, nparts, rubvec);
idxcopy(graph->nvtxs, graph->where, part);
FreeGraph(graph, 0);
return graph->mincut;
}
/*************************************************************************
* This function is the entry point for KWMETIS with seed specification
* in options[7]
**************************************************************************/
void METIS_WPartGraphKway2(idxtype *nvtxs, idxtype *xadj, idxtype *adjncy, idxtype *vwgt,
idxtype *adjwgt, idxtype *wgtflag, idxtype *numflag, idxtype *nparts,
float *tpwgts, idxtype *options, idxtype *edgecut, idxtype *part)
{
idxtype i, j;
GraphType graph;
CtrlType ctrl;
if (*numflag == 1)
Change2CNumbering(*nvtxs, xadj, adjncy);
SetUpGraph(&graph, OP_KMETIS, *nvtxs, 1, xadj, adjncy, vwgt, adjwgt, *wgtflag);
if (options[0] == 0) { /* Use the default parameters */
ctrl.CType = KMETIS_CTYPE;
ctrl.IType = KMETIS_ITYPE;
ctrl.RType = KMETIS_RTYPE;
ctrl.dbglvl = KMETIS_DBGLVL;
}
else {
ctrl.CType = options[OPTION_CTYPE];
ctrl.IType = options[OPTION_ITYPE];
ctrl.RType = options[OPTION_RTYPE];
ctrl.dbglvl = options[OPTION_DBGLVL];
}
ctrl.optype = OP_KMETIS;
ctrl.CoarsenTo = 20*(*nparts);
ctrl.maxvwgt = 1.5*((graph.vwgt ? idxsum(*nvtxs, graph.vwgt, 1) : (*nvtxs))/ctrl.CoarsenTo);
InitRandom(options[7]);
AllocateWorkSpace(&ctrl, &graph, *nparts);
IFSET(ctrl.dbglvl, DBG_TIME, InitTimers(&ctrl));
IFSET(ctrl.dbglvl, DBG_TIME, gk_startcputimer(ctrl.TotalTmr));
*edgecut = MlevelKWayPartitioning(&ctrl, &graph, *nparts, part, tpwgts, 1.03);
IFSET(ctrl.dbglvl, DBG_TIME, gk_stopcputimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
FreeWorkSpace(&ctrl, &graph);
if (*numflag == 1)
Change2FNumbering(*nvtxs, xadj, adjncy, part);
}
/*************************************************************************
* This function computes the initial bisection of the coarsest graph
**************************************************************************/
void InitSeparator(CtrlType *ctrl, GraphType *graph, float ubfactor)
{
idxtype dbglvl;
dbglvl = ctrl->dbglvl;
IFSET(ctrl->dbglvl, DBG_REFINE, ctrl->dbglvl -= DBG_REFINE);
IFSET(ctrl->dbglvl, DBG_MOVEINFO, ctrl->dbglvl -= DBG_MOVEINFO);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
GrowBisectionNode(ctrl, graph, ubfactor);
Compute2WayNodePartitionParams(ctrl, graph);
IFSET(ctrl->dbglvl, DBG_IPART, mprintf("Initial Sep: %D\n", graph->mincut));
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
ctrl->dbglvl = dbglvl;
}
void Init2WayPartition(ctrl_t *ctrl, graph_t *graph, real_t *ntpwgts,
idx_t niparts)
{
mdbglvl_et dbglvl;
ASSERT(graph->tvwgt[0] >= 0);
dbglvl = ctrl->dbglvl;
IFSET(ctrl->dbglvl, METIS_DBG_REFINE, ctrl->dbglvl -= METIS_DBG_REFINE);
IFSET(ctrl->dbglvl, METIS_DBG_MOVEINFO, ctrl->dbglvl -= METIS_DBG_MOVEINFO);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
switch (ctrl->iptype) {
case METIS_IPTYPE_RANDOM:
if (graph->ncon == 1)
RandomBisection(ctrl, graph, ntpwgts, niparts);
else
McRandomBisection(ctrl, graph, ntpwgts, niparts);
break;
case METIS_IPTYPE_GROW:
if (graph->nedges == 0)
if (graph->ncon == 1)
RandomBisection(ctrl, graph, ntpwgts, niparts);
else
McRandomBisection(ctrl, graph, ntpwgts, niparts);
else
if (graph->ncon == 1)
GrowBisection(ctrl, graph, ntpwgts, niparts);
else
McGrowBisection(ctrl, graph, ntpwgts, niparts);
break;
default:
gk_errexit(SIGERR, "Unknown initial partition type: %d\n", ctrl->iptype);
}
IFSET(ctrl->dbglvl, METIS_DBG_IPART, printf("Initial Cut: %"PRIDX"\n", graph->mincut));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
ctrl->dbglvl = dbglvl;
}
void GPReportResults(params_t *params, graph_t *graph, idx_t *part, idx_t objval)
{
gk_startcputimer(params->reporttimer);
ComputePartitionInfo(params, graph, part);
gk_stopcputimer(params->reporttimer);
FILE *fp;
fp = fopen( "metis.log", "a" );
fprintf( fp,"\nTiming Information ----------------------------------------------------------\n");
fprintf( fp," I/O: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->iotimer));
fprintf( fp," Partitioning: \t\t %7.3"PRREAL" sec (METIS time)\n", gk_getcputimer(params->parttimer));
fprintf( fp," Reporting: \t\t %7.3"PRREAL" sec\n", gk_getcputimer(params->reporttimer));
fprintf( fp,"\nMemory Information ----------------------------------------------------------\n");
fprintf( fp," Max memory used:\t\t %7.3"PRREAL" MB\n", (real_t)(params->maxmemory/(1024.0*1024.0)));
fprintf( fp,"******************************************************************************\n");
fclose( fp );
}
void InitSeparator(ctrl_t *ctrl, graph_t *graph, idx_t niparts)
{
real_t ntpwgts[2] = {0.5, 0.5};
mdbglvl_et dbglvl;
dbglvl = ctrl->dbglvl;
IFSET(ctrl->dbglvl, METIS_DBG_REFINE, ctrl->dbglvl -= METIS_DBG_REFINE);
IFSET(ctrl->dbglvl, METIS_DBG_MOVEINFO, ctrl->dbglvl -= METIS_DBG_MOVEINFO);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->InitPartTmr));
/* this is required for the cut-based part of the refinement */
Setup2WayBalMultipliers(ctrl, graph, ntpwgts);
switch (ctrl->iptype) {
case METIS_IPTYPE_EDGE:
if (graph->nedges == 0)
RandomBisection(ctrl, graph, ntpwgts, niparts);
else
GrowBisection(ctrl, graph, ntpwgts, niparts);
Compute2WayPartitionParams(ctrl, graph);
ConstructSeparator(ctrl, graph);
break;
case METIS_IPTYPE_NODE:
GrowBisectionNode(ctrl, graph, ntpwgts, niparts);
break;
default:
gk_errexit(SIGERR, "Unkown iptype of %"PRIDX"\n", ctrl->iptype);
}
IFSET(ctrl->dbglvl, METIS_DBG_IPART, printf("Initial Sep: %"PRIDX"\n", graph->mincut));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->InitPartTmr));
ctrl->dbglvl = dbglvl;
}
void SplitGraphOrder(ctrl_t *ctrl, graph_t *graph, graph_t **r_lgraph,
graph_t **r_rgraph)
{
idx_t i, ii, j, k, l, istart, iend, mypart, nvtxs, snvtxs[3], snedges[3];
idx_t *xadj, *vwgt, *adjncy, *adjwgt, *label, *where, *bndptr, *bndind;
idx_t *sxadj[2], *svwgt[2], *sadjncy[2], *sadjwgt[2], *slabel[2];
idx_t *rename;
idx_t *auxadjncy;
graph_t *lgraph, *rgraph;
WCOREPUSH;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->SplitTmr));
nvtxs = graph->nvtxs;
xadj = graph->xadj;
vwgt = graph->vwgt;
adjncy = graph->adjncy;
adjwgt = graph->adjwgt;
label = graph->label;
where = graph->where;
bndptr = graph->bndptr;
bndind = graph->bndind;
ASSERT(bndptr != NULL);
rename = iwspacemalloc(ctrl, nvtxs);
snvtxs[0] = snvtxs[1] = snvtxs[2] = snedges[0] = snedges[1] = snedges[2] = 0;
for (i=0; i<nvtxs; i++) {
k = where[i];
rename[i] = snvtxs[k]++;
snedges[k] += xadj[i+1]-xadj[i];
}
lgraph = SetupSplitGraph(graph, snvtxs[0], snedges[0]);
sxadj[0] = lgraph->xadj;
svwgt[0] = lgraph->vwgt;
sadjncy[0] = lgraph->adjncy;
sadjwgt[0] = lgraph->adjwgt;
slabel[0] = lgraph->label;
rgraph = SetupSplitGraph(graph, snvtxs[1], snedges[1]);
sxadj[1] = rgraph->xadj;
svwgt[1] = rgraph->vwgt;
sadjncy[1] = rgraph->adjncy;
sadjwgt[1] = rgraph->adjwgt;
slabel[1] = rgraph->label;
/* Go and use bndptr to also mark the boundary nodes in the two partitions */
for (ii=0; ii<graph->nbnd; ii++) {
i = bndind[ii];
for (j=xadj[i]; j<xadj[i+1]; j++)
bndptr[adjncy[j]] = 1;
}
snvtxs[0] = snvtxs[1] = snedges[0] = snedges[1] = 0;
sxadj[0][0] = sxadj[1][0] = 0;
for (i=0; i<nvtxs; i++) {
if ((mypart = where[i]) == 2)
continue;
istart = xadj[i];
iend = xadj[i+1];
if (bndptr[i] == -1) { /* This is an interior vertex */
auxadjncy = sadjncy[mypart] + snedges[mypart] - istart;
for(j=istart; j<iend; j++)
auxadjncy[j] = adjncy[j];
snedges[mypart] += iend-istart;
}
else {
auxadjncy = sadjncy[mypart];
l = snedges[mypart];
for (j=istart; j<iend; j++) {
k = adjncy[j];
if (where[k] == mypart)
auxadjncy[l++] = k;
}
snedges[mypart] = l;
}
svwgt[mypart][snvtxs[mypart]] = vwgt[i];
slabel[mypart][snvtxs[mypart]] = label[i];
sxadj[mypart][++snvtxs[mypart]] = snedges[mypart];
}
for (mypart=0; mypart<2; mypart++) {
iend = snedges[mypart];
iset(iend, 1, sadjwgt[mypart]);
auxadjncy = sadjncy[mypart];
for (i=0; i<iend; i++)
auxadjncy[i] = rename[auxadjncy[i]];
}
lgraph->nvtxs = snvtxs[0];
lgraph->nedges = snedges[0];
rgraph->nvtxs = snvtxs[1];
rgraph->nedges = snedges[1];
SetupGraph_tvwgt(lgraph);
SetupGraph_tvwgt(rgraph);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->SplitTmr));
*r_lgraph = lgraph;
*r_rgraph = rgraph;
WCOREPOP;
}
/*************************************************************************
* Let the game begin
**************************************************************************/
int main(int argc, char *argv[])
{
idxtype i, options[10];
idxtype *perm, *iperm;
GraphType graph;
char filename[256];
idxtype numflag = 0, wgtflag;
double TOTALTmr, METISTmr, IOTmr, SMBTmr;
if (argc != 2) {
mprintf("Usage: %s <GraphFile>\n",argv[0]);
exit(0);
}
strcpy(filename, argv[1]);
gk_clearcputimer(TOTALTmr);
gk_clearcputimer(METISTmr);
gk_clearcputimer(IOTmr);
gk_clearcputimer(SMBTmr);
gk_startcputimer(TOTALTmr);
gk_startcputimer(IOTmr);
ReadGraph(&graph, filename, &wgtflag);
if (graph.nvtxs <= 0) {
mprintf("Empty graph. Nothing to do.\n");
exit(0);
}
if (graph.ncon != 1) {
mprintf("Ordering can only be applied to graphs with one constraint.\n");
exit(0);
}
gk_stopcputimer(IOTmr);
/* Ordering does not use weights! */
gk_free((void **)&graph.vwgt, &graph.adjwgt, LTERM);
mprintf("**********************************************************************\n");
mprintf("%s", METISTITLE);
mprintf("Graph Information ---------------------------------------------------\n");
mprintf(" Name: %s, #Vertices: %D, #Edges: %D\n\n", filename, graph.nvtxs, graph.nedges/2);
mprintf("Node-Based Ordering... ----------------------------------------------\n");
perm = idxmalloc(graph.nvtxs, "main: perm");
iperm = idxmalloc(graph.nvtxs, "main: iperm");
options[0] = 0;
gk_startcputimer(METISTmr);
METIS_NodeND(&graph.nvtxs, graph.xadj, graph.adjncy, &numflag, options, perm, iperm);
gk_stopcputimer(METISTmr);
gk_startcputimer(IOTmr);
WritePermutation(filename, iperm, graph.nvtxs);
gk_stopcputimer(IOTmr);
gk_startcputimer(SMBTmr);
ComputeFillIn(&graph, iperm);
gk_stopcputimer(SMBTmr);
gk_stopcputimer(TOTALTmr);
mprintf("\nTiming Information --------------------------------------------------\n");
mprintf(" I/O: \t %7.3f\n", gk_getcputimer(IOTmr));
mprintf(" Ordering: \t %7.3f (ONMETIS time)\n", gk_getcputimer(METISTmr));
mprintf(" Symbolic Factorization: \t %7.3f\n", gk_getcputimer(SMBTmr));
mprintf(" Total: \t %7.3f\n", gk_getcputimer(TOTALTmr));
mprintf("**********************************************************************\n");
gk_free((void **)&graph.xadj, &graph.adjncy, &perm, &iperm, LTERM);
}
/*************************************************************************
* This function takes a graph and creates a sequence of coarser graphs
**************************************************************************/
GraphType *MCCoarsen2Way(CtrlType *ctrl, GraphType *graph)
{
idxtype i, clevel;
GraphType *cgraph;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->CoarsenTmr));
cgraph = graph;
clevel = 0;
do {
if (ctrl->dbglvl&DBG_COARSEN) {
mprintf("%6D %7D %10D [%D] [%6.4f", cgraph->nvtxs, cgraph->nedges,
idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1), ctrl->CoarsenTo, ctrl->nmaxvwgt);
for (i=0; i<graph->ncon; i++)
mprintf(" %5.3f", gk_fsum(cgraph->nvtxs, cgraph->nvwgt+i, cgraph->ncon));
mprintf("]\n");
}
if (cgraph->nedges == 0) {
MCMatch_RM(ctrl, cgraph);
}
else {
switch (ctrl->CType) {
case MTYPE_RM:
MCMatch_RM(ctrl, cgraph);
break;
case MTYPE_HEM:
if (clevel < 1)
MCMatch_RM(ctrl, cgraph);
else
MCMatch_HEM(ctrl, cgraph);
break;
case MTYPE_SHEM:
if (clevel < 1)
MCMatch_RM(ctrl, cgraph);
else
MCMatch_SHEM(ctrl, cgraph);
break;
case MTYPE_SHEMKWAY:
MCMatch_SHEM(ctrl, cgraph);
break;
case MTYPE_SHEBM_ONENORM:
MCMatch_SHEBM(ctrl, cgraph, 1);
break;
case MTYPE_SHEBM_INFNORM:
MCMatch_SHEBM(ctrl, cgraph, -1);
break;
case MTYPE_SBHEM_ONENORM:
MCMatch_SBHEM(ctrl, cgraph, 1);
break;
case MTYPE_SBHEM_INFNORM:
MCMatch_SBHEM(ctrl, cgraph, -1);
break;
default:
errexit("Unknown CType: %d\n", ctrl->CType);
}
}
cgraph = cgraph->coarser;
clevel++;
} while (cgraph->nvtxs > ctrl->CoarsenTo && cgraph->nvtxs < COARSEN_FRACTION2*cgraph->finer->nvtxs && cgraph->nedges > cgraph->nvtxs/2);
if (ctrl->dbglvl&DBG_COARSEN) {
mprintf("%6D %7D %10D [%D] [%6.4f", cgraph->nvtxs, cgraph->nedges,
idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1), ctrl->CoarsenTo, ctrl->nmaxvwgt);
for (i=0; i<graph->ncon; i++)
mprintf(" %5.3f", gk_fsum(cgraph->nvtxs, cgraph->nvwgt+i, cgraph->ncon));
mprintf("]\n");
}
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->CoarsenTmr));
return cgraph;
}
/*************************************************************************
* Let the game begin
**************************************************************************/
int main(int argc, char *argv[])
{
idxtype i, j, ne, nn, etype, mtype, numflag=0, nparts, edgecut;
idxtype *elmnts, *epart, *npart, *metype, *weights;
double IOTmr, DUALTmr;
char etypestr[5][5] = {"TRI", "TET", "HEX", "QUAD", "LINE"};
GraphType graph;
if (argc != 3) {
mprintf("Usage: %s <meshfile> <nparts>\n",argv[0]);
exit(0);
}
nparts = atoi(argv[2]);
if (nparts < 2) {
mprintf("nparts must be greater than one.\n");
exit(0);
}
gk_clearcputimer(IOTmr);
gk_clearcputimer(DUALTmr);
mtype=MeshType(argv[1]);
ne=MixedElements(argv[1]);
metype = idxmalloc(ne, "main: metype");
weights = idxmalloc(ne, "main: weights");
gk_startcputimer(IOTmr);
if(mtype==1)
elmnts = ReadMesh(argv[1], &ne, &nn, &etype);
else if(mtype==3)
elmnts = ReadMeshWgt(argv[1], &ne, &nn, &etype, weights);
else if(mtype==0)
elmnts = ReadMixedMesh(argv[1], &ne, &nn, metype);
else
elmnts = ReadMixedMeshWgt(argv[1], &ne, &nn, metype, weights);
gk_stopcputimer(IOTmr);
epart = idxmalloc(ne, "main: epart");
npart = idxmalloc(nn, "main: npart");
mprintf("**********************************************************************\n");
mprintf("%s", METISTITLE);
mprintf("Mesh Information ----------------------------------------------------\n");
if (mtype==1)
mprintf(" Name: %s, #Elements: %D, #Nodes: %D, Etype: %s\n\n", argv[1], ne, nn, etypestr[etype-1]);
else
mprintf(" Name: %s, #Elements: %D, #Nodes: %D, Etype: %s\n\n", argv[1], ne, nn, "Mixed");
mprintf("Partitioning Nodal Graph... -----------------------------------------\n");
gk_startcputimer(DUALTmr);
if (mtype==1 || mtype==3)
METIS_PartMeshNodal(&ne, &nn, elmnts, &etype, &numflag, &nparts, &edgecut, epart, npart);
else
METIS_PartMixedMeshNodal(&ne, &nn, elmnts, metype, &numflag, &nparts, &edgecut, epart, npart);
gk_stopcputimer(DUALTmr);
mprintf(" %D-way Edge-Cut: %7D, Balance: %5.2f\n", nparts, edgecut, ComputeElementBalance(ne, nparts, epart));
gk_startcputimer(IOTmr);
WriteMeshPartition(argv[1], nparts, ne, epart, nn, npart);
gk_stopcputimer(IOTmr);
mprintf("\nTiming Information --------------------------------------------------\n");
mprintf(" I/O: \t\t %7.3f\n", gk_getcputimer(IOTmr));
mprintf(" Partitioning: \t\t %7.3f\n", gk_getcputimer(DUALTmr));
mprintf("**********************************************************************\n");
/*
graph.nvtxs = ne;
graph.xadj = idxmalloc(ne+1, "xadj");
graph.vwgt = idxsmalloc(ne, 1, "vwgt");
graph.adjncy = idxmalloc(10*ne, "adjncy");
graph.adjwgt = idxsmalloc(10*ne, 1, "adjncy");
METIS_MeshToDual(&ne, &nn, elmnts, &etype, &numflag, graph.xadj, graph.adjncy);
ComputePartitionInfo(&graph, nparts, epart);
gk_free((void **)&graph.xadj, &graph.adjncy, &graph.vwgt, &graph.adjwgt, LTERM);
*/
gk_free((void **)&elmnts, &epart, &npart, &metype, &weights, LTERM);
}
idx_t* gpmetis( int argc, char **argv )
/*************************************************************************/
/*! Let the game begin! */
/*************************************************************************/
//int main(int argc, char *argv[])
{
idx_t i;
char *curptr, *newptr;
idx_t options[METIS_NOPTIONS];
graph_t *graph;
idx_t *part;
idx_t objval;
params_t *params;
int status=0;
gk_optind = 0;
//printf( "argc: %d\n", argc );
//printf( "gk_optind %d\n", gk_optind );
fflush( stdout );
for( i = 0; i < argc; i++ )
{
//printf( "%s*\n", argv[ i ] );
}
params = parse_cmdline(argc, argv);
//printf( "gk_optind %d\n", gk_optind );
//fflush( stdout );
//return NULL;
gk_startcputimer(params->iotimer);
graph = ReadGraph(params);
ReadTPwgts(params, graph->ncon);
gk_stopcputimer(params->iotimer);
/* Check if the graph is contiguous */
if (params->contig && !IsConnected(graph, 0)) {
printf("***The input graph is not contiguous.\n"
"***The specified -contig option will be ignored.\n");
params->contig = 0;
}
/* Get ubvec if supplied */
if (params->ubvecstr) {
params->ubvec = rmalloc(graph->ncon, "main");
curptr = params->ubvecstr;
for (i=0; i<graph->ncon; i++) {
params->ubvec[i] = strtoreal(curptr, &newptr);
if (curptr == newptr)
errexit("Error parsing entry #%"PRIDX" of ubvec [%s] (possibly missing).\n",
i, params->ubvecstr);
curptr = newptr;
}
}
/* Setup iptype */
if (params->iptype == -1) {
if (params->ptype == METIS_PTYPE_RB) {
if (graph->ncon == 1)
params->iptype = METIS_IPTYPE_GROW;
else
params->iptype = METIS_IPTYPE_RANDOM;
}
}
GPPrintInfo(params, graph);
part = imalloc(graph->nvtxs, "main: part");
METIS_SetDefaultOptions(options);
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_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;
options[METIS_OPTION_UFACTOR] = params->ufactor;
options[METIS_OPTION_DBGLVL] = params->dbglvl;
gk_malloc_init();
gk_startcputimer(params->parttimer);
switch (params->ptype) {
case METIS_PTYPE_RB:
status = METIS_PartGraphRecursive(&graph->nvtxs, &graph->ncon, graph->xadj,
graph->adjncy, graph->vwgt, graph->vsize, graph->adjwgt,
¶ms->nparts, params->tpwgts, params->ubvec, options,
&objval, part);
break;
case METIS_PTYPE_KWAY:
status = METIS_PartGraphKway(&graph->nvtxs, &graph->ncon, graph->xadj,
graph->adjncy, graph->vwgt, graph->vsize, graph->adjwgt,
¶ms->nparts, params->tpwgts, params->ubvec, options,
&objval, part);
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);
WritePartition(params->filename, part, graph->nvtxs, params->nparts);
gk_stopcputimer(params->iotimer);
}
GPReportResults(params, graph, part, objval);
}
idx_t *r_part = ( idx_t* ) calloc( graph->nvtxs, sizeof( idx_t ) );
for( i = 0; i < graph->nvtxs; i++ )
{
r_part[ i ] = part[ i ];
}
FreeGraph(&graph);
gk_free((void **)&part, LTERM);
gk_free((void **)¶ms->filename, ¶ms->tpwgtsfile, ¶ms->tpwgts,
¶ms->ubvecstr, ¶ms->ubvec, ¶ms, LTERM);
return r_part;
}
int main(int argc, char *argv[])
{
idx_t options[METIS_NOPTIONS];
bigraph_t *bigraph;
idx_t *perm, *iperm;
params_t *params;
int status, i, j;
/* rdiags[i][0] and cdiags[i][0] saves the length of each array
* excluding the first value */
idx_t **rdiags, **cdiags;
idx_t ndiags;
params = parse_cmdline(argc, argv);
gk_startcputimer(params->iotimer);
bigraph = ReadBiGraph(params);
gk_stopcputimer(params->iotimer);
if(bigraph == NULL){
printf("Input Error : nrows + ncols != nvtxs\n");
printf("\n***Metis returned with an error.\n");
return -1;
}
BDFPrintInfo(params, bigraph);
METIS_SetDefaultOptions(options);
/*User specific parameters*/
options[METIS_OPTION_CTYPE] = params->ctype;
options[METIS_OPTION_IPTYPE] = params->iptype;
options[METIS_OPTION_RTYPE] = params->rtype;
options[METIS_OPTION_CCORDER] = params->ccorder;
options[METIS_OPTION_SEED] = params->seed;
options[METIS_OPTION_DBGLVL] = params->dbglvl;
options[METIS_OPTION_DENSITY] = params->density * DIVIDER;
options[METIS_OPTION_NROWS] = params->nrows;
options[METIS_OPTION_NCOLS] = params->ncols;
options[METIS_OPTION_KAPPA] = params->kappa;
options[METIS_OPTION_NDIAGS] = params->ndiags;
/*Inner parameters*/
options[METIS_OPTION_COMPRESS] = params->compress;
options[METIS_OPTION_UFACTOR] = params->ufactor;
options[METIS_OPTION_PFACTOR] = params->pfactor;
options[METIS_OPTION_NCUTS] = params->ncuts;
options[METIS_OPTION_NSEPS] = params->nseps;
options[METIS_OPTION_NITER] = params->niter;
options[METIS_OPTION_OBJTYPE] = params->objtype;
perm = imalloc(bigraph->super->nvtxs, "main: perm");
iperm = imalloc(bigraph->super->nvtxs, "main: iperm");
gk_malloc_init();
gk_startcputimer(params->parttimer);
/* Initialize my global paramters */
gk_clearcputimer(_parttimer);
gk_clearcputimer(_nztimer);
_totalcheck = 0;
_firsthit = 0;
_maxarea = -1;
_maxnz = -1;
_minarea = 700000000000;
_minnz = 300000000;
_avgarea = 0;
_avgnz = 0;
_maxdense = 0;
_mindense = 0;
/* All the memory that is not allocated in this file should be allocated after
* gk_malloc_init() and be freed before gk_GetCurMemoryUsed().
* Memory that is allocated in this file should be free in the end of main()*/
status = METIS_NodeBDF(&bigraph->super->nvtxs, bigraph->super->xadj, bigraph->super->adjncy,
bigraph->super->vwgt, bigraph->nrows, bigraph->ncols,
options, bigraph->rlabel->label, bigraph->rlabel->ref, bigraph->clabel->label, bigraph->clabel->ref,
&rdiags, &cdiags, &ndiags, perm, iperm);
gk_stopcputimer(params->parttimer);
if (gk_GetCurMemoryUsed() != 0)
printf("***It seems that Metis did not free all of its memory!\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 permutation */
gk_startcputimer(params->iotimer);
WritePermutation(params->filename, iperm, bigraph->super->nvtxs);
WriteDiags(params->filename, rdiags, cdiags, ndiags);
gk_stopcputimer(params->iotimer);
}
BDFReportResults(params, bigraph);
}
/* free inner function memory */
for (i = 0; i < ndiags; i++) {
free((void*)rdiags[i]);
free((void*)cdiags[i]);
}
free((void*)rdiags);
free((void*)cdiags);
/* free memroy allocated in this function */
FreeBiGraph((ctrl_t*)NULL, &bigraph);
gk_free((void **)&perm, &iperm, LTERM);
gk_free((void **)¶ms->filename, ¶ms->tpwgtsfile, ¶ms->tpwgts,
¶ms->ubvec, ¶ms, LTERM);
return status;
}
/*************************************************************************
* This function is the entry point for the node ND code for ParMETIS
**************************************************************************/
void METIS_NodeNDP(idxtype nvtxs, idxtype *xadj, idxtype *adjncy, idxtype npes,
idxtype *options, idxtype *perm, idxtype *iperm, idxtype *sizes)
{
idxtype i, ii, j, l, wflag, nflag;
GraphType graph;
CtrlType ctrl;
idxtype *cptr, *cind;
if (options[0] == 0) { /* Use the default parameters */
ctrl.CType = ONMETIS_CTYPE;
ctrl.IType = ONMETIS_ITYPE;
ctrl.RType = ONMETIS_RTYPE;
ctrl.dbglvl = ONMETIS_DBGLVL;
ctrl.oflags = ONMETIS_OFLAGS;
ctrl.pfactor = ONMETIS_PFACTOR;
ctrl.nseps = ONMETIS_NSEPS;
}
else {
ctrl.CType = options[OPTION_CTYPE];
ctrl.IType = options[OPTION_ITYPE];
ctrl.RType = options[OPTION_RTYPE];
ctrl.dbglvl = options[OPTION_DBGLVL];
ctrl.oflags = options[OPTION_OFLAGS];
ctrl.pfactor = options[OPTION_PFACTOR];
ctrl.nseps = options[OPTION_NSEPS];
}
if (ctrl.nseps < 1)
ctrl.nseps = 1;
ctrl.optype = OP_ONMETIS;
ctrl.CoarsenTo = 100;
IFSET(ctrl.dbglvl, DBG_TIME, InitTimers(&ctrl));
IFSET(ctrl.dbglvl, DBG_TIME, gk_startcputimer(ctrl.TotalTmr));
InitRandom(-1);
if (ctrl.oflags&OFLAG_COMPRESS) {
/*============================================================
* Compress the graph
==============================================================*/
cptr = idxmalloc(nvtxs+1, "ONMETIS: cptr");
cind = idxmalloc(nvtxs, "ONMETIS: cind");
CompressGraph(&ctrl, &graph, nvtxs, xadj, adjncy, cptr, cind);
if (graph.nvtxs >= COMPRESSION_FRACTION*(nvtxs)) {
ctrl.oflags--; /* We actually performed no compression */
gk_free((void **)&cptr, &cind, LTERM);
}
else if (2*graph.nvtxs < nvtxs && ctrl.nseps == 1)
ctrl.nseps = 2;
}
else {
SetUpGraph(&graph, OP_ONMETIS, nvtxs, 1, xadj, adjncy, NULL, NULL, 0);
}
/*=============================================================
* Do the nested dissection ordering
--=============================================================*/
ctrl.maxvwgt = 1.5*(idxsum(graph.nvtxs, graph.vwgt, 1)/ctrl.CoarsenTo);
AllocateWorkSpace(&ctrl, &graph, 2);
idxset(2*npes-1, 0, sizes);
MlevelNestedDissectionP(&ctrl, &graph, iperm, graph.nvtxs, npes, 0, sizes);
FreeWorkSpace(&ctrl, &graph);
if (ctrl.oflags&OFLAG_COMPRESS) { /* Uncompress the ordering */
if (graph.nvtxs < COMPRESSION_FRACTION*(nvtxs)) {
/* construct perm from iperm */
for (i=0; i<graph.nvtxs; i++)
perm[iperm[i]] = i;
for (l=ii=0; ii<graph.nvtxs; ii++) {
i = perm[ii];
for (j=cptr[i]; j<cptr[i+1]; j++)
iperm[cind[j]] = l++;
}
}
gk_free((void **)&cptr, &cind, LTERM);
}
for (i=0; i<nvtxs; i++)
perm[iperm[i]] = i;
IFSET(ctrl.dbglvl, DBG_TIME, gk_stopcputimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
}
/*************************************************************************
* This function takes a graph and a bisection and splits it into two graphs.
**************************************************************************/
void SplitGraphPart(CtrlType *ctrl, GraphType *graph, GraphType *lgraph, GraphType *rgraph)
{
idxtype i, j, k, kk, l, istart, iend, mypart, nvtxs, ncon, snvtxs[2], snedges[2], sum;
idxtype *xadj, *vwgt, *adjncy, *adjwgt, *adjwgtsum, *label, *where, *bndptr;
idxtype *sxadj[2], *svwgt[2], *sadjncy[2], *sadjwgt[2], *sadjwgtsum[2], *slabel[2];
idxtype *rename;
idxtype *auxadjncy, *auxadjwgt;
float *nvwgt, *snvwgt[2], *npwgts;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->SplitTmr));
nvtxs = graph->nvtxs;
ncon = graph->ncon;
xadj = graph->xadj;
vwgt = graph->vwgt;
nvwgt = graph->nvwgt;
adjncy = graph->adjncy;
adjwgt = graph->adjwgt;
adjwgtsum = graph->adjwgtsum;
label = graph->label;
where = graph->where;
bndptr = graph->bndptr;
npwgts = graph->npwgts;
ASSERT(bndptr != NULL);
rename = idxwspacemalloc(ctrl, nvtxs);
snvtxs[0] = snvtxs[1] = snedges[0] = snedges[1] = 0;
for (i=0; i<nvtxs; i++) {
k = where[i];
rename[i] = snvtxs[k]++;
snedges[k] += xadj[i+1]-xadj[i];
}
SetUpSplitGraph(graph, lgraph, snvtxs[0], snedges[0]);
sxadj[0] = lgraph->xadj;
svwgt[0] = lgraph->vwgt;
snvwgt[0] = lgraph->nvwgt;
sadjwgtsum[0] = lgraph->adjwgtsum;
sadjncy[0] = lgraph->adjncy;
sadjwgt[0] = lgraph->adjwgt;
slabel[0] = lgraph->label;
SetUpSplitGraph(graph, rgraph, snvtxs[1], snedges[1]);
sxadj[1] = rgraph->xadj;
svwgt[1] = rgraph->vwgt;
snvwgt[1] = rgraph->nvwgt;
sadjwgtsum[1] = rgraph->adjwgtsum;
sadjncy[1] = rgraph->adjncy;
sadjwgt[1] = rgraph->adjwgt;
slabel[1] = rgraph->label;
snvtxs[0] = snvtxs[1] = snedges[0] = snedges[1] = 0;
sxadj[0][0] = sxadj[1][0] = 0;
for (i=0; i<nvtxs; i++) {
mypart = where[i];
sum = adjwgtsum[i];
istart = xadj[i];
iend = xadj[i+1];
if (bndptr[i] == -1) { /* This is an interior vertex */
auxadjncy = sadjncy[mypart] + snedges[mypart] - istart;
auxadjwgt = sadjwgt[mypart] + snedges[mypart] - istart;
for(j=istart; j<iend; j++) {
auxadjncy[j] = adjncy[j];
auxadjwgt[j] = adjwgt[j];
}
snedges[mypart] += iend-istart;
}
else {
auxadjncy = sadjncy[mypart];
auxadjwgt = sadjwgt[mypart];
l = snedges[mypart];
for (j=istart; j<iend; j++) {
k = adjncy[j];
if (where[k] == mypart) {
auxadjncy[l] = k;
auxadjwgt[l++] = adjwgt[j];
}
else {
sum -= adjwgt[j];
}
}
snedges[mypart] = l;
}
if (ncon == 1)
svwgt[mypart][snvtxs[mypart]] = vwgt[i];
else {
for (kk=0; kk<ncon; kk++)
snvwgt[mypart][snvtxs[mypart]*ncon+kk] = nvwgt[i*ncon+kk]/npwgts[mypart*ncon+kk];
}
sadjwgtsum[mypart][snvtxs[mypart]] = sum;
slabel[mypart][snvtxs[mypart]] = label[i];
sxadj[mypart][++snvtxs[mypart]] = snedges[mypart];
}
for (mypart=0; mypart<2; mypart++) {
iend = sxadj[mypart][snvtxs[mypart]];
auxadjncy = sadjncy[mypart];
for (i=0; i<iend; i++)
auxadjncy[i] = rename[auxadjncy[i]];
}
lgraph->nedges = snedges[0];
rgraph->nedges = snedges[1];
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->SplitTmr));
idxwspacefree(ctrl, nvtxs);
}
/*************************************************************************
* This function creates the coarser graph
**************************************************************************/
void CreateCoarseGraph_NVW(CtrlType *ctrl, GraphType *graph, idxtype cnvtxs, idxtype *match, idxtype *perm)
{
idxtype i, j, jj, k, kk, l, m, istart, iend, nvtxs, nedges, ncon, cnedges, v, u, mask;
idxtype *xadj, *adjncy, *adjwgtsum, *auxadj;
idxtype *cmap, *htable;
idxtype *cxadj, *cvwgt, *cadjncy, *cadjwgt, *cadjwgtsum;
float *nvwgt, *cnvwgt;
GraphType *cgraph;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->ContractTmr));
nvtxs = graph->nvtxs;
ncon = graph->ncon;
xadj = graph->xadj;
nvwgt = graph->nvwgt;
adjncy = graph->adjncy;
adjwgtsum = graph->adjwgtsum;
cmap = graph->cmap;
/* Initialize the coarser graph */
cgraph = SetUpCoarseGraph(graph, cnvtxs, 0);
cxadj = cgraph->xadj;
cvwgt = cgraph->vwgt;
cnvwgt = cgraph->nvwgt;
cadjwgtsum = cgraph->adjwgtsum;
cadjncy = cgraph->adjncy;
cadjwgt = cgraph->adjwgt;
iend = xadj[nvtxs];
auxadj = ctrl->wspace.auxcore;
memcpy(auxadj, adjncy, iend*sizeof(idxtype));
for (i=0; i<iend; i++)
auxadj[i] = cmap[auxadj[i]];
mask = HTLENGTH;
htable = idxset(mask+1, -1, idxwspacemalloc(ctrl, mask+1));
cxadj[0] = cnvtxs = cnedges = 0;
for (i=0; i<nvtxs; i++) {
v = perm[i];
if (cmap[v] != cnvtxs)
continue;
u = match[v];
cvwgt[cnvtxs] = 1;
cadjwgtsum[cnvtxs] = adjwgtsum[v];
nedges = 0;
istart = xadj[v];
iend = xadj[v+1];
for (j=istart; j<iend; j++) {
k = auxadj[j];
kk = k&mask;
if ((m = htable[kk]) == -1) {
cadjncy[nedges] = k;
cadjwgt[nedges] = 1;
htable[kk] = nedges++;
}
else if (cadjncy[m] == k) {
cadjwgt[m]++;
}
else {
for (jj=0; jj<nedges; jj++) {
if (cadjncy[jj] == k) {
cadjwgt[jj]++;
break;
}
}
if (jj == nedges) {
cadjncy[nedges] = k;
cadjwgt[nedges++] = 1;
}
}
}
if (v != u) {
cvwgt[cnvtxs]++;
cadjwgtsum[cnvtxs] += adjwgtsum[u];
istart = xadj[u];
iend = xadj[u+1];
for (j=istart; j<iend; j++) {
k = auxadj[j];
kk = k&mask;
if ((m = htable[kk]) == -1) {
cadjncy[nedges] = k;
cadjwgt[nedges] = 1;
htable[kk] = nedges++;
}
else if (cadjncy[m] == k) {
cadjwgt[m]++;
}
else {
for (jj=0; jj<nedges; jj++) {
if (cadjncy[jj] == k) {
cadjwgt[jj]++;
break;
}
}
if (jj == nedges) {
cadjncy[nedges] = k;
cadjwgt[nedges++] = 1;
}
}
}
/* Remove the contracted adjacency weight */
jj = htable[cnvtxs&mask];
if (jj >= 0 && cadjncy[jj] != cnvtxs) {
for (jj=0; jj<nedges; jj++) {
if (cadjncy[jj] == cnvtxs)
break;
}
}
if (jj >= 0 && cadjncy[jj] == cnvtxs) { /* This 2nd check is needed for non-adjacent matchings */
cadjwgtsum[cnvtxs] -= cadjwgt[jj];
cadjncy[jj] = cadjncy[--nedges];
cadjwgt[jj] = cadjwgt[nedges];
}
}
ASSERTP(cadjwgtsum[cnvtxs] == idxsum(nedges, cadjwgt), ("%d %d %d %d %d\n", cnvtxs, cadjwgtsum[cnvtxs], idxsum(nedges, cadjwgt), adjwgtsum[u], adjwgtsum[v]));
for (j=0; j<nedges; j++)
htable[cadjncy[j]&mask] = -1; /* Zero out the htable */
htable[cnvtxs&mask] = -1;
cnedges += nedges;
cxadj[++cnvtxs] = cnedges;
cadjncy += nedges;
cadjwgt += nedges;
}
cgraph->nedges = cnedges;
ReAdjustMemory(graph, cgraph, 0);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->ContractTmr));
idxwspacefree(ctrl, mask+1);
}
/*************************************************************************
* This function takes a graph and creates a sequence of coarser graphs
**************************************************************************/
GraphType *Coarsen2Way(CtrlType *ctrl, GraphType *graph)
{
idxtype clevel;
GraphType *cgraph;
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->CoarsenTmr));
cgraph = graph;
/* The following is ahack to allow the multiple bisections to go through with correct
coarsening */
if (ctrl->CType > 20) {
clevel = 1;
ctrl->CType -= 20;
}
else
clevel = 0;
do {
IFSET(ctrl->dbglvl, DBG_COARSEN, mprintf("%6D %7D %7D [%D] [%D %D]\n",
cgraph->nvtxs, cgraph->nedges/2, idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1)/2,
ctrl->CoarsenTo, ctrl->maxvwgt,
(cgraph->vwgt ? idxsum(cgraph->nvtxs, cgraph->vwgt, 1) : cgraph->nvtxs)));
if (cgraph->adjwgt) {
switch (ctrl->CType) {
case MTYPE_RM:
Match_RM(ctrl, cgraph);
break;
case MTYPE_HEM:
if (clevel < 1 || cgraph->nedges == 0)
Match_RM(ctrl, cgraph);
else
Match_HEM(ctrl, cgraph);
break;
case MTYPE_SHEM:
if (clevel < 1 || cgraph->nedges == 0)
Match_RM(ctrl, cgraph);
else
Match_SHEM(ctrl, cgraph);
break;
case MTYPE_SHEMKWAY:
if (cgraph->nedges == 0)
Match_RM(ctrl, cgraph);
else
Match_SHEM(ctrl, cgraph);
break;
default:
errexit("Unknown CType: %d\n", ctrl->CType);
}
}
else {
Match_RM_NVW(ctrl, cgraph);
}
cgraph = cgraph->coarser;
clevel++;
} while (cgraph->nvtxs > ctrl->CoarsenTo && cgraph->nvtxs < COARSEN_FRACTION2*cgraph->finer->nvtxs && cgraph->nedges > cgraph->nvtxs/2);
IFSET(ctrl->dbglvl, DBG_COARSEN, mprintf("%6D %7D %7D [%D] [%D %D]\n",
cgraph->nvtxs, cgraph->nedges/2, idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1)/2,
ctrl->CoarsenTo, ctrl->maxvwgt,
(cgraph->vwgt ? idxsum(cgraph->nvtxs, cgraph->vwgt, 1) : cgraph->nvtxs)));
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->CoarsenTmr));
return cgraph;
}
int METIS_NodeND(idx_t *nvtxs, idx_t *xadj, idx_t *adjncy, idx_t *vwgt,
idx_t *options, idx_t *perm, idx_t *iperm)
{
int sigrval=0, renumber=0;
idx_t i, ii, j, l, nnvtxs=0;
graph_t *graph=NULL;
ctrl_t *ctrl;
idx_t *cptr, *cind, *piperm;
int numflag = 0;
/* set up malloc cleaning code and signal catchers */
if (!gk_malloc_init())
return METIS_ERROR_MEMORY;
gk_sigtrap();
if ((sigrval = gk_sigcatch()) != 0)
goto SIGTHROW;
/* set up the run time parameters */
ctrl = SetupCtrl(METIS_OP_OMETIS, options, 1, 3, NULL, NULL);
if (!ctrl) {
gk_siguntrap();
return METIS_ERROR_INPUT;
}
/* if required, change the numbering to 0 */
if (ctrl->numflag == 1) {
Change2CNumbering(*nvtxs, xadj, adjncy);
renumber = 1;
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, InitTimers(ctrl));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->TotalTmr));
/* prune the dense columns */
if (ctrl->pfactor > 0.0) {
piperm = imalloc(*nvtxs, "OMETIS: piperm");
graph = PruneGraph(ctrl, *nvtxs, xadj, adjncy, vwgt, piperm, ctrl->pfactor);
if (graph == NULL) {
/* if there was no prunning, cleanup the pfactor */
gk_free((void **)&piperm, LTERM);
ctrl->pfactor = 0.0;
}
else {
nnvtxs = graph->nvtxs;
ctrl->compress = 0; /* disable compression if prunning took place */
}
}
/* compress the graph; note that compression only happens if not prunning
has taken place. */
if (ctrl->compress) {
cptr = imalloc(*nvtxs+1, "OMETIS: cptr");
cind = imalloc(*nvtxs, "OMETIS: cind");
graph = CompressGraph(ctrl, *nvtxs, xadj, adjncy, vwgt, cptr, cind);
if (graph == NULL) {
/* if there was no compression, cleanup the compress flag */
gk_free((void **)&cptr, &cind, LTERM);
ctrl->compress = 0;
}
else {
nnvtxs = graph->nvtxs;
ctrl->cfactor = 1.0*(*nvtxs)/nnvtxs;
if (ctrl->cfactor > 1.5 && ctrl->nseps == 1)
ctrl->nseps = 2;
//ctrl->nseps = (idx_t)(ctrl->cfactor*ctrl->nseps);
}
}
/* if no prunning and no compression, setup the graph in the normal way. */
if (ctrl->pfactor == 0.0 && ctrl->compress == 0)
graph = SetupGraph(ctrl, *nvtxs, 1, xadj, adjncy, vwgt, NULL, NULL);
ASSERT(CheckGraph(graph, ctrl->numflag, 1));
/* allocate workspace memory */
AllocateWorkSpace(ctrl, graph);
/* do the nested dissection ordering */
if (ctrl->ccorder)
MlevelNestedDissectionCC(ctrl, graph, iperm, graph->nvtxs);
else
MlevelNestedDissection(ctrl, graph, iperm, graph->nvtxs);
if (ctrl->pfactor > 0.0) { /* Order any prunned vertices */
icopy(nnvtxs, iperm, perm); /* Use perm as an auxiliary array */
for (i=0; i<nnvtxs; i++)
iperm[piperm[i]] = perm[i];
for (i=nnvtxs; i<*nvtxs; i++)
iperm[piperm[i]] = i;
gk_free((void **)&piperm, LTERM);
}
else if (ctrl->compress) { /* Uncompress the ordering */
/* construct perm from iperm */
for (i=0; i<nnvtxs; i++)
perm[iperm[i]] = i;
for (l=ii=0; ii<nnvtxs; ii++) {
i = perm[ii];
for (j=cptr[i]; j<cptr[i+1]; j++)
iperm[cind[j]] = l++;
}
gk_free((void **)&cptr, &cind, LTERM);
}
for (i=0; i<*nvtxs; i++)
perm[iperm[i]] = i;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->TotalTmr));
IFSET(ctrl->dbglvl, METIS_DBG_TIME, PrintTimers(ctrl));
/* clean up */
FreeCtrl(&ctrl);
SIGTHROW:
/* if required, change the numbering back to 1 */
if (renumber)
Change2FNumberingOrder(*nvtxs, xadj, adjncy, perm, iperm);
gk_siguntrap();
gk_malloc_cleanup(0);
return metis_rcode(sigrval);
}
void FM_2WayNodeRefine1Sided(ctrl_t *ctrl, graph_t *graph, idx_t niter)
{
idx_t i, ii, j, k, jj, kk, nvtxs, nbnd, nswaps, nmind, iend;
idx_t *xadj, *vwgt, *adjncy, *where, *pwgts, *edegrees, *bndind, *bndptr;
idx_t *mptr, *mind, *swaps;
rpq_t *queue;
nrinfo_t *rinfo;
idx_t higain, mincut, initcut, mincutorder;
idx_t pass, to, other, limit;
idx_t badmaxpwgt, mindiff, newdiff;
real_t mult;
WCOREPUSH;
nvtxs = graph->nvtxs;
xadj = graph->xadj;
adjncy = graph->adjncy;
vwgt = graph->vwgt;
bndind = graph->bndind;
bndptr = graph->bndptr;
where = graph->where;
pwgts = graph->pwgts;
rinfo = graph->nrinfo;
queue = rpqCreate(nvtxs);
swaps = iwspacemalloc(ctrl, nvtxs);
mptr = iwspacemalloc(ctrl, nvtxs+1);
mind = iwspacemalloc(ctrl, 2*nvtxs);
mult = 0.5*ctrl->ubfactors[0];
badmaxpwgt = (idx_t)(mult*(pwgts[0]+pwgts[1]+pwgts[2]));
IFSET(ctrl->dbglvl, METIS_DBG_REFINE,
printf("Partitions-N1: [%6"PRIDX" %6"PRIDX"] Nv-Nb[%6"PRIDX" %6"PRIDX"]. ISep: %6"PRIDX"\n", pwgts[0], pwgts[1], graph->nvtxs, graph->nbnd, graph->mincut));
to = (pwgts[0] < pwgts[1] ? 1 : 0);
for (pass=0; pass<2*niter; pass++) { /* the 2*niter is for the two sides */
other = to;
to = (to+1)%2;
rpqReset(queue);
mincutorder = -1;
initcut = mincut = graph->mincut;
nbnd = graph->nbnd;
/* use the swaps array in place of the traditional perm array to save memory */
irandArrayPermute(nbnd, swaps, nbnd, 1);
for (ii=0; ii<nbnd; ii++) {
i = bndind[swaps[ii]];
ASSERT(where[i] == 2);
rpqInsert(queue, i, vwgt[i]-rinfo[i].edegrees[other]);
}
ASSERT(CheckNodeBnd(graph, nbnd));
ASSERT(CheckNodePartitionParams(graph));
limit = (ctrl->compress ? gk_min(5*nbnd, 500) : gk_min(3*nbnd, 300));
/******************************************************
* Get into the FM loop
*******************************************************/
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->Aux3Tmr));
mptr[0] = nmind = 0;
mindiff = iabs(pwgts[0]-pwgts[1]);
for (nswaps=0; nswaps<nvtxs; nswaps++) {
if ((higain = rpqGetTop(queue)) == -1)
break;
ASSERT(bndptr[higain] != -1);
/* The following check is to ensure we break out if there is a posibility
of over-running the mind array. */
if (nmind + xadj[higain+1]-xadj[higain] >= 2*nvtxs-1)
break;
if (pwgts[to]+vwgt[higain] > badmaxpwgt)
break; /* No point going any further. Balance will be bad */
pwgts[2] -= (vwgt[higain]-rinfo[higain].edegrees[other]);
newdiff = iabs(pwgts[to]+vwgt[higain] - (pwgts[other]-rinfo[higain].edegrees[other]));
if (pwgts[2] < mincut || (pwgts[2] == mincut && newdiff < mindiff)) {
mincut = pwgts[2];
mincutorder = nswaps;
mindiff = newdiff;
}
else {
if (nswaps - mincutorder > 3*limit ||
(nswaps - mincutorder > limit && pwgts[2] > 1.10*mincut)) {
pwgts[2] += (vwgt[higain]-rinfo[higain].edegrees[other]);
break; /* No further improvement, break out */
}
}
BNDDelete(nbnd, bndind, bndptr, higain);
pwgts[to] += vwgt[higain];
where[higain] = to;
swaps[nswaps] = higain;
/**********************************************************
* Update the degrees of the affected nodes
***********************************************************/
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->Aux1Tmr));
for (j=xadj[higain]; j<xadj[higain+1]; j++) {
k = adjncy[j];
if (where[k] == 2) { /* For the in-separator vertices modify their edegree[to] */
rinfo[k].edegrees[to] += vwgt[higain];
}
else if (where[k] == other) { /* This vertex is pulled into the separator */
ASSERTP(bndptr[k] == -1, ("%"PRIDX" %"PRIDX" %"PRIDX"\n", k, bndptr[k], where[k]));
BNDInsert(nbnd, bndind, bndptr, k);
mind[nmind++] = k; /* Keep track for rollback */
where[k] = 2;
pwgts[other] -= vwgt[k];
edegrees = rinfo[k].edegrees;
edegrees[0] = edegrees[1] = 0;
for (jj=xadj[k], iend=xadj[k+1]; jj<iend; jj++) {
kk = adjncy[jj];
if (where[kk] != 2)
edegrees[where[kk]] += vwgt[kk];
else {
rinfo[kk].edegrees[other] -= vwgt[k];
/* Since the moves are one-sided this vertex has not been moved yet */
rpqUpdate(queue, kk, vwgt[kk]-rinfo[kk].edegrees[other]);
}
}
/* Insert the new vertex into the priority queue. Safe due to one-sided moves */
rpqInsert(queue, k, vwgt[k]-edegrees[other]);
}
}
mptr[nswaps+1] = nmind;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->Aux1Tmr));
IFSET(ctrl->dbglvl, METIS_DBG_MOVEINFO,
printf("Moved %6"PRIDX" to %3"PRIDX", Gain: %5"PRIDX" [%5"PRIDX"] \t[%5"PRIDX" %5"PRIDX" %5"PRIDX"] [%3"PRIDX" %2"PRIDX"]\n",
higain, to, (vwgt[higain]-rinfo[higain].edegrees[other]), vwgt[higain],
pwgts[0], pwgts[1], pwgts[2], nswaps, limit));
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->Aux3Tmr));
/****************************************************************
* Roll back computation
*****************************************************************/
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->Aux2Tmr));
for (nswaps--; nswaps>mincutorder; nswaps--) {
higain = swaps[nswaps];
ASSERT(CheckNodePartitionParams(graph));
ASSERT(where[higain] == to);
INC_DEC(pwgts[2], pwgts[to], vwgt[higain]);
where[higain] = 2;
BNDInsert(nbnd, bndind, bndptr, higain);
edegrees = rinfo[higain].edegrees;
edegrees[0] = edegrees[1] = 0;
for (j=xadj[higain]; j<xadj[higain+1]; j++) {
k = adjncy[j];
if (where[k] == 2)
rinfo[k].edegrees[to] -= vwgt[higain];
else
edegrees[where[k]] += vwgt[k];
}
/* Push nodes out of the separator */
for (j=mptr[nswaps]; j<mptr[nswaps+1]; j++) {
k = mind[j];
ASSERT(where[k] == 2);
where[k] = other;
INC_DEC(pwgts[other], pwgts[2], vwgt[k]);
BNDDelete(nbnd, bndind, bndptr, k);
for (jj=xadj[k], iend=xadj[k+1]; jj<iend; jj++) {
kk = adjncy[jj];
if (where[kk] == 2)
rinfo[kk].edegrees[other] += vwgt[k];
}
}
}
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->Aux2Tmr));
ASSERT(mincut == pwgts[2]);
IFSET(ctrl->dbglvl, METIS_DBG_REFINE,
printf("\tMinimum sep: %6"PRIDX" at %5"PRIDX", PWGTS: [%6"PRIDX" %6"PRIDX"], NBND: %6"PRIDX"\n", mincut, mincutorder, pwgts[0], pwgts[1], nbnd));
graph->mincut = mincut;
graph->nbnd = nbnd;
if (pass%2 == 1 && (mincutorder == -1 || mincut >= initcut))
break;
}
rpqDestroy(queue);
WCOREPOP;
}
void RefineKWay(ctrl_t *ctrl, graph_t *orggraph, graph_t *graph)
{
idx_t i, nlevels, contig=ctrl->contig;
graph_t *ptr;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->UncoarsenTmr));
/* Determine how many levels are there */
for (ptr=graph, nlevels=0; ptr!=orggraph; ptr=ptr->finer, nlevels++);
/* Compute the parameters of the coarsest graph */
ComputeKWayPartitionParams(ctrl, graph);
/* Try to minimize the sub-domain connectivity */
if (ctrl->minconn)
EliminateSubDomainEdges(ctrl, graph);
/* Deal with contiguity constraints at the beginning */
if (contig && FindPartitionInducedComponents(graph, graph->where, NULL, NULL) > ctrl->nparts) {
EliminateComponents(ctrl, graph);
ComputeKWayBoundary(ctrl, graph, BNDTYPE_BALANCE);
Greedy_KWayOptimize(ctrl, graph, 5, 0, OMODE_BALANCE);
ComputeKWayBoundary(ctrl, graph, BNDTYPE_REFINE);
Greedy_KWayOptimize(ctrl, graph, ctrl->niter, 0, OMODE_REFINE);
ctrl->contig = 0;
}
/* Refine each successively finer graph */
for (i=0; ;i++) {
if (ctrl->minconn && i == nlevels/2)
EliminateSubDomainEdges(ctrl, graph);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->RefTmr));
if (2*i >= nlevels && !IsBalanced(ctrl, graph, .02)) {
ComputeKWayBoundary(ctrl, graph, BNDTYPE_BALANCE);
Greedy_KWayOptimize(ctrl, graph, 1, 0, OMODE_BALANCE);
ComputeKWayBoundary(ctrl, graph, BNDTYPE_REFINE);
}
Greedy_KWayOptimize(ctrl, graph, ctrl->niter, 5.0, OMODE_REFINE);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->RefTmr));
/* Deal with contiguity constraints in the middle */
if (contig && i == nlevels/2) {
if (FindPartitionInducedComponents(graph, graph->where, NULL, NULL) > ctrl->nparts) {
EliminateComponents(ctrl, graph);
if (!IsBalanced(ctrl, graph, .02)) {
ctrl->contig = 1;
ComputeKWayBoundary(ctrl, graph, BNDTYPE_BALANCE);
Greedy_KWayOptimize(ctrl, graph, 5, 0, OMODE_BALANCE);
ComputeKWayBoundary(ctrl, graph, BNDTYPE_REFINE);
Greedy_KWayOptimize(ctrl, graph, ctrl->niter, 0, OMODE_REFINE);
ctrl->contig = 0;
}
}
}
if (graph == orggraph)
break;
graph = graph->finer;
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_startcputimer(ctrl->ProjectTmr));
ASSERT(graph->vwgt != NULL);
ProjectKWayPartition(ctrl, graph);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->ProjectTmr));
}
/* Deal with contiguity requirement at the end */
ctrl->contig = contig;
if (contig && FindPartitionInducedComponents(graph, graph->where, NULL, NULL) > ctrl->nparts)
EliminateComponents(ctrl, graph);
if (!IsBalanced(ctrl, graph, 0.0)) {
ComputeKWayBoundary(ctrl, graph, BNDTYPE_BALANCE);
Greedy_KWayOptimize(ctrl, graph, 10, 0, OMODE_BALANCE);
ComputeKWayBoundary(ctrl, graph, BNDTYPE_REFINE);
Greedy_KWayOptimize(ctrl, graph, ctrl->niter, 0, OMODE_REFINE);
}
if (ctrl->contig)
ASSERT(FindPartitionInducedComponents(graph, graph->where, NULL, NULL) == ctrl->nparts);
IFSET(ctrl->dbglvl, METIS_DBG_TIME, gk_stopcputimer(ctrl->UncoarsenTmr));
}
/*************************************************************************
* This function creates the coarser graph
**************************************************************************/
void CreateCoarseGraphNoMask(CtrlType *ctrl, GraphType *graph, idxtype cnvtxs, idxtype *match, idxtype *perm)
{
idxtype i, j, k, m, istart, iend, nvtxs, nedges, ncon, cnedges, v, u, dovsize;
idxtype *xadj, *vwgt, *vsize, *adjncy, *adjwgt, *adjwgtsum, *auxadj;
idxtype *cmap, *htable;
idxtype *cxadj, *cvwgt, *cvsize, *cadjncy, *cadjwgt, *cadjwgtsum;
float *nvwgt, *cnvwgt;
GraphType *cgraph;
dovsize = (ctrl->optype == OP_KVMETIS ? 1 : 0);
IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->ContractTmr));
nvtxs = graph->nvtxs;
ncon = graph->ncon;
xadj = graph->xadj;
vwgt = graph->vwgt;
vsize = graph->vsize;
nvwgt = graph->nvwgt;
adjncy = graph->adjncy;
adjwgt = graph->adjwgt;
adjwgtsum = graph->adjwgtsum;
cmap = graph->cmap;
/* Initialize the coarser graph */
cgraph = SetUpCoarseGraph(graph, cnvtxs, dovsize);
cxadj = cgraph->xadj;
cvwgt = cgraph->vwgt;
cvsize = cgraph->vsize;
cnvwgt = cgraph->nvwgt;
cadjwgtsum = cgraph->adjwgtsum;
cadjncy = cgraph->adjncy;
cadjwgt = cgraph->adjwgt;
htable = idxset(cnvtxs, -1, idxwspacemalloc(ctrl, cnvtxs));
iend = xadj[nvtxs];
auxadj = ctrl->wspace.auxcore;
memcpy(auxadj, adjncy, iend*sizeof(idxtype));
for (i=0; i<iend; i++)
auxadj[i] = cmap[auxadj[i]];
cxadj[0] = cnvtxs = cnedges = 0;
for (i=0; i<nvtxs; i++) {
v = perm[i];
if (cmap[v] != cnvtxs)
continue;
u = match[v];
if (ncon == 1)
cvwgt[cnvtxs] = vwgt[v];
else
gk_fcopy(ncon, nvwgt+v*ncon, cnvwgt+cnvtxs*ncon);
if (dovsize)
cvsize[cnvtxs] = vsize[v];
cadjwgtsum[cnvtxs] = adjwgtsum[v];
nedges = 0;
istart = xadj[v];
iend = xadj[v+1];
for (j=istart; j<iend; j++) {
k = auxadj[j];
if ((m = htable[k]) == -1) {
cadjncy[nedges] = k;
cadjwgt[nedges] = adjwgt[j];
htable[k] = nedges++;
}
else {
cadjwgt[m] += adjwgt[j];
}
}
if (v != u) {
if (ncon == 1)
cvwgt[cnvtxs] += vwgt[u];
else
gk_faxpy(ncon, 1.0, nvwgt+u*ncon, 1, cnvwgt+cnvtxs*ncon, 1);
if (dovsize)
cvsize[cnvtxs] += vsize[u];
cadjwgtsum[cnvtxs] += adjwgtsum[u];
istart = xadj[u];
iend = xadj[u+1];
for (j=istart; j<iend; j++) {
k = auxadj[j];
if ((m = htable[k]) == -1) {
cadjncy[nedges] = k;
cadjwgt[nedges] = adjwgt[j];
htable[k] = nedges++;
}
else {
cadjwgt[m] += adjwgt[j];
}
}
/* Remove the contracted adjacency weight */
if ((j = htable[cnvtxs]) != -1) {
ASSERT(cadjncy[j] == cnvtxs);
cadjwgtsum[cnvtxs] -= cadjwgt[j];
cadjncy[j] = cadjncy[--nedges];
cadjwgt[j] = cadjwgt[nedges];
htable[cnvtxs] = -1;
}
}
ASSERTP(cadjwgtsum[cnvtxs] == idxsum(nedges, cadjwgt), ("%d %d\n", cadjwgtsum[cnvtxs], idxsum(nedges, cadjwgt)));
for (j=0; j<nedges; j++)
htable[cadjncy[j]] = -1; /* Zero out the htable */
cnedges += nedges;
cxadj[++cnvtxs] = cnedges;
cadjncy += nedges;
cadjwgt += nedges;
}
cgraph->nedges = cnedges;
ReAdjustMemory(graph, cgraph, dovsize);
IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->ContractTmr));
idxwspacefree(ctrl, cnvtxs);
}
