/*************************************************************************
* This function is the entry point for ONCMETIS
**************************************************************************/
void METIS_NodeND(int *nvtxs, idxtype *xadj, idxtype *adjncy, int *numflag, int *options,
idxtype *perm, idxtype *iperm)
{
int i, ii, j, l, wflag, nflag;
GraphType graph;
CtrlType ctrl;
idxtype *cptr, *cind, *piperm;
if (*numflag == 1)
Change2CNumbering(*nvtxs, xadj, adjncy);
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, starttimer(ctrl.TotalTmr));
InitRandom(-1);
if (ctrl.pfactor > 0) {
/*============================================================
* Prune the dense columns
==============================================================*/
piperm = idxmalloc(*nvtxs, "ONMETIS: piperm");
PruneGraph(&ctrl, &graph, *nvtxs, xadj, adjncy, piperm, (float)(0.1*ctrl.pfactor));
}
else 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 */
GKfree((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)/ctrl.CoarsenTo);
AllocateWorkSpace(&ctrl, &graph, 2);
if (ctrl.oflags&OFLAG_CCMP)
MlevelNestedDissectionCC(&ctrl, &graph, iperm, ORDER_UNBALANCE_FRACTION, graph.nvtxs);
else
MlevelNestedDissection(&ctrl, &graph, iperm, ORDER_UNBALANCE_FRACTION, graph.nvtxs);
FreeWorkSpace(&ctrl, &graph);
if (ctrl.pfactor > 0) { /* Order any prunned vertices */
if (graph.nvtxs < *nvtxs) {
idxcopy(graph.nvtxs, iperm, perm); /* Use perm as an auxiliary array */
for (i=0; i<graph.nvtxs; i++)
iperm[piperm[i]] = perm[i];
for (i=graph.nvtxs; i<*nvtxs; i++)
iperm[piperm[i]] = i;
}
GKfree((void**)&piperm, LTERM);
}
else 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++;
}
}
GKfree((void**)&cptr, &cind, LTERM);
}
for (i=0; i<*nvtxs; i++)
perm[iperm[i]] = i;
IFSET(ctrl.dbglvl, DBG_TIME, stoptimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
if (*numflag == 1)
Change2FNumberingOrder(*nvtxs, xadj, adjncy, perm, iperm);
}
/*************************************************************************
* This function is the entry point for PWMETIS that accepts exact weights
* for the target partitions
**************************************************************************/
void METIS_mCPartGraphRecursive2(int *nvtxs, int *ncon, idxtype *xadj, idxtype *adjncy,
idxtype *vwgt, idxtype *adjwgt, int *wgtflag, int *numflag, int *nparts,
float *tpwgts, int *options, int *edgecut, idxtype *part)
{
int i, j;
GraphType graph;
CtrlType ctrl;
float *mytpwgts;
float avgwgt;
if (*numflag == 1)
Change2CNumbering(*nvtxs, xadj, adjncy);
SetUpGraph(&graph, OP_PMETIS, *nvtxs, *ncon, xadj, adjncy, vwgt, adjwgt, *wgtflag);
graph.npwgts = NULL;
mytpwgts = fmalloc(*nparts, "mytpwgts");
scopy(*nparts, tpwgts, mytpwgts);
if (options[0] == 0) { /* Use the default parameters */
ctrl.CType = McPMETIS_CTYPE;
ctrl.IType = McPMETIS_ITYPE;
ctrl.RType = McPMETIS_RTYPE;
ctrl.dbglvl = McPMETIS_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 = 100;
ctrl.nmaxvwgt = 1.5/(1.0*ctrl.CoarsenTo);
InitRandom(options[7]);
AllocateWorkSpace(&ctrl, &graph, *nparts);
IFSET(ctrl.dbglvl, DBG_TIME, InitTimers(&ctrl));
IFSET(ctrl.dbglvl, DBG_TIME, starttimer(ctrl.TotalTmr));
ASSERT(CheckGraph(&graph));
*edgecut = MCMlevelRecursiveBisection2(&ctrl, &graph, *nparts, mytpwgts, part, 1.000, 0);
/*
{
idxtype wgt[2048], minwgt, maxwgt, sumwgt;
printf("nvtxs: %d, nparts: %d, ncon: %d\n", graph.nvtxs, *nparts, *ncon);
for (i=0; i<(*nparts)*(*ncon); i++)
wgt[i] = 0;
for (i=0; i<graph.nvtxs; i++)
for (j=0; j<*ncon; j++)
wgt[part[i]*(*ncon)+j] += vwgt[i*(*ncon)+j];
for (j=0; j<*ncon; j++) {
minwgt = maxwgt = sumwgt = 0;
for (i=0; i<(*nparts); i++) {
minwgt = (wgt[i*(*ncon)+j] < wgt[minwgt*(*ncon)+j]) ? i : minwgt;
maxwgt = (wgt[i*(*ncon)+j] > wgt[maxwgt*(*ncon)+j]) ? i : maxwgt;
sumwgt += wgt[i*(*ncon)+j];
}
avgwgt = (float)sumwgt / (float)*nparts;
printf("min: %5d, max: %5d, avg: %5.2f, balance: %6.3f\n", wgt[minwgt*(*ncon)+j], wgt[maxwgt*(*ncon)+j], avgwgt, (float)wgt[maxwgt*(*ncon)+j] / avgwgt);
}
printf("\n");
}
*/
IFSET(ctrl.dbglvl, DBG_TIME, stoptimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
FreeWorkSpace(&ctrl, &graph);
GKfree((void *)&mytpwgts, LTERM);
if (*numflag == 1)
Change2FNumbering(*nvtxs, xadj, adjncy, part);
}
/*************************************************************************
* This function is the entry point for the node ND code for ParMETIS
**************************************************************************/
void METIS_NodeNDP(int nvtxs, idxtype *xadj, idxtype *adjncy, int npes,
int *options, idxtype *perm, idxtype *iperm, idxtype *sizes)
{
int 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, starttimer(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 */
GKfree(&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)/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++;
}
}
GKfree(&cptr, &cind, LTERM);
}
for (i=0; i<nvtxs; i++)
perm[iperm[i]] = i;
IFSET(ctrl.dbglvl, DBG_TIME, stoptimer(ctrl.TotalTmr));
IFSET(ctrl.dbglvl, DBG_TIME, PrintTimers(&ctrl));
}
void mlmclWithGraph(GraphType *graph,idxtype* indices,Options opt)
{
GraphType *cgraph,*t;
int nvtxs=graph->nvtxs;
CtrlType ctrl;
int levels=0;
Matrix *M=NULL;
int ct = ctrl.CoarsenTo = opt.coarsenTo, runMcl=0;
ctrl.CType=opt.matchType;
/* if ( nvtxs > 50000 )
ctrl.CType = MATCH_POWERLAW_FC; */
ctrl.optype=OP_KMETIS;
// ctrl.maxvwgt = (int) round( ((ct>100)?nvtxs/100: nvtxs/ct));
// ctrl.maxvwgt = (ctrl.maxvwgt > 5000 ) ? 5000 : ctrl.maxvwgt ;
ctrl.dbglvl=1;
if ( ct < 5 )
ctrl.maxvwgt = (int) ceil( (1.5*nvtxs)/ct );
else if ( ct <= 100 )
ctrl.maxvwgt = (int) ceil( (2.0*nvtxs)/ct );
else if ( ct > 100 )
{
// we can allow some imbalance here.
ctrl.maxvwgt = (int) ceil( 10.0 * nvtxs/ct );
}
my_AllocateWorkSpace(&ctrl,graph);
cgraph = Coarsen2Way(&ctrl,graph);
FreeWorkSpace(&ctrl, graph);
// printf( "Coarsen time:%.2f\n",gettimer(ctrl.CoarsenTmr) );
for(levels=0,t=cgraph;t->finer!=NULL;t=t->finer,levels++);
printf("Coarsened %d levels\n", levels);
printf("Number of vertices in coarsest graph:%d\n", cgraph->nvtxs);
// printf("In lib/mlmcl.c: penalty_power:%.1f\n", opt.penalty_power);
fflush(stdout);
while ( cgraph != NULL )
{
Matrix *M0, *Mnew;
int iters;
// dump_graph(cgraph);
M0=setupCanonicalMatrix(cgraph->nvtxs, cgraph->nedges,
cgraph->xadj, cgraph->adjncy, cgraph->adjwgt, opt.ncutify);
if ( cgraph->coarser != NULL )
{
// if this is not the original graph, then we don't
// need the adjacency information in the graph
// anymore. M0 is what we want, and we have it, so we
// can free cgraph->gdata.
GKfree( (void**)&(cgraph->gdata), LTERM);
}
if ( cgraph->coarser == NULL )
{
// if this is the coarsest graph, flow matrix is same as
// the transition matrix.
M=M0;
// dumpMatrix(M);
}
if (cgraph->finer == NULL)
iters=opt.num_last_iter;
else
iters=opt.iter_per_level;
if ( cgraph->coarser == NULL )
{;
//printRow(M,35);
//printRow(M,36);
}
Mnew=dprmcl(M,M0,cgraph, opt, iters, levels);
// M would have been freed in mclForMultiLevel, so no
// need to free it here.
/* if ( M0 != NULL )
{
freeMatrix(M0);
} */
if ( cgraph->coarser == NULL )
{
//printRow(Mnew,35);
//printRow(Mnew,36);
}
if ( runMcl > 0 && cgraph->finer == NULL )
{
/* run original mcl so that the matrix moves closer to
* convergence */
M=dprmcl(Mnew,Mnew,cgraph, opt, iters/2,levels);
/* Mnew would not have been freed in mclForMultiLevel
* above. */
freeMatrix(Mnew);
}
else
{
M=Mnew;
}
if ( cgraph->finer != NULL )
{
int nnzRefinedGraph = 2*M->nnz;
if ( ctrl.CType == MATCH_POWERLAW_FC )
{
int ii;
nnzRefinedGraph = 0;
for ( ii=0; ii<cgraph->finer->nvtxs; ii++ )
{
int tx=cgraph->finer->cmap[ii];
nnzRefinedGraph +=
M->xadj[tx+1]-M->xadj[tx];
}
}
else if ( ctrl.CType == MATCH_HASH && levels <= 3 )
{
int ii;
nnzRefinedGraph=0;
for ( ii=0; ii<cgraph->nvtxs; ii++ )
{
nnzRefinedGraph += cgraph->vwgt[ii] *
(M->xadj[ii+1] - M->xadj[ii]);
}
}
// dumpMatrix(M);
Mnew=propagateFlow(M,cgraph,cgraph->finer,nnzRefinedGraph);
// dumpMatrix(Mnew);
if ( M != NULL )
{
freeMatrix(M);
}
M=Mnew;
}
cgraph=cgraph->finer;
// These two didn't get freed earlier, when we freed
// gdata.
if ( cgraph != NULL )
{
GKfree( (void**)&(cgraph->coarser->vwgt),
(void**)&(cgraph->coarser->rmap1), LTERM);
}
levels--;
printf("Done level %d\n", levels+1);
fflush(stdout);
}
getAttractorsForAll(M);
idxcopy(nvtxs, M->attractors, indices);
/* int nClusters = 0;
wgttype minWgt = 0;
idxtype *ret = getNodesToComponentMap(M, &nClusters, minWgt);
idxcopy(nvtxs, ret, indices);
free(ret);
*/
freeMatrix(M);
}