mirror of
https://develop.openfoam.com/Development/openfoam.git
synced 2025-11-28 03:28:01 +00:00
425 lines
12 KiB
C
425 lines
12 KiB
C
/*
|
|
* Copyright 1997, Regents of the University of Minnesota
|
|
*
|
|
* initpart.c
|
|
*
|
|
* This file contains code that performs the initial partition of the
|
|
* coarsest graph
|
|
*
|
|
* Started 7/23/97
|
|
* George
|
|
*
|
|
*/
|
|
|
|
#include <metislib.h>
|
|
|
|
/*************************************************************************
|
|
* 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 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;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*************************************************************************
|
|
* This function takes a graph and produces a bisection by using a region
|
|
* growing algorithm. The resulting partition is returned in
|
|
* graph->where
|
|
**************************************************************************/
|
|
void GrowBisection(CtrlType *ctrl, GraphType *graph, idxtype *tpwgts, float ubfactor)
|
|
{
|
|
idxtype i, j, k, nvtxs, drain, nleft, first, last, pwgts[2], minpwgt[2],
|
|
maxpwgt[2], from, bestcut, icut, mincut, me, pass, nbfs, inbfs;
|
|
idxtype *xadj, *vwgt, *adjncy, *adjwgt, *where;
|
|
idxtype *queue, *touched, *gain, *bestwhere;
|
|
|
|
|
|
nvtxs = graph->nvtxs;
|
|
xadj = graph->xadj;
|
|
vwgt = graph->vwgt;
|
|
adjncy = graph->adjncy;
|
|
adjwgt = graph->adjwgt;
|
|
|
|
Allocate2WayPartitionMemory(ctrl, graph);
|
|
where = graph->where;
|
|
|
|
bestwhere = idxmalloc(nvtxs, "BisectGraph: bestwhere");
|
|
queue = idxmalloc(nvtxs, "BisectGraph: queue");
|
|
touched = idxmalloc(nvtxs, "BisectGraph: touched");
|
|
|
|
ASSERTP(tpwgts[0]+tpwgts[1] == idxsum(nvtxs, vwgt, 1), ("%d %d\n", tpwgts[0]+tpwgts[1], idxsum(nvtxs, vwgt, 1)));
|
|
|
|
maxpwgt[0] = ubfactor*tpwgts[0];
|
|
maxpwgt[1] = ubfactor*tpwgts[1];
|
|
minpwgt[0] = (1.0/ubfactor)*tpwgts[0];
|
|
minpwgt[1] = (1.0/ubfactor)*tpwgts[1];
|
|
|
|
nbfs = (nvtxs <= ctrl->CoarsenTo ? SMALLNIPARTS : LARGENIPARTS);
|
|
for (inbfs=0; inbfs<nbfs; inbfs++) {
|
|
idxset(nvtxs, 0, touched);
|
|
|
|
pwgts[1] = tpwgts[0]+tpwgts[1];
|
|
pwgts[0] = 0;
|
|
|
|
idxset(nvtxs, 1, where);
|
|
|
|
queue[0] = RandomInRange(nvtxs);
|
|
touched[queue[0]] = 1;
|
|
first = 0; last = 1;
|
|
nleft = nvtxs-1;
|
|
drain = 0;
|
|
|
|
/* Start the BFS from queue to get a partition */
|
|
for (;;) {
|
|
if (first == last) { /* Empty. Disconnected graph! */
|
|
if (nleft == 0 || drain)
|
|
break;
|
|
|
|
k = RandomInRange(nleft);
|
|
for (i=0; i<nvtxs; i++) {
|
|
if (touched[i] == 0) {
|
|
if (k == 0)
|
|
break;
|
|
else
|
|
k--;
|
|
}
|
|
}
|
|
|
|
queue[0] = i;
|
|
touched[i] = 1;
|
|
first = 0; last = 1;;
|
|
nleft--;
|
|
}
|
|
|
|
i = queue[first++];
|
|
if (pwgts[0] > 0 && pwgts[1]-vwgt[i] < minpwgt[1]) {
|
|
drain = 1;
|
|
continue;
|
|
}
|
|
|
|
where[i] = 0;
|
|
INC_DEC(pwgts[0], pwgts[1], vwgt[i]);
|
|
if (pwgts[1] <= maxpwgt[1])
|
|
break;
|
|
|
|
drain = 0;
|
|
for (j=xadj[i]; j<xadj[i+1]; j++) {
|
|
k = adjncy[j];
|
|
if (touched[k] == 0) {
|
|
queue[last++] = k;
|
|
touched[k] = 1;
|
|
nleft--;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check to see if we hit any bad limiting cases */
|
|
if (pwgts[1] == 0) {
|
|
i = RandomInRange(nvtxs);
|
|
where[i] = 1;
|
|
INC_DEC(pwgts[1], pwgts[0], vwgt[i]);
|
|
}
|
|
|
|
/*************************************************************
|
|
* Do some partition refinement
|
|
**************************************************************/
|
|
Compute2WayPartitionParams(ctrl, graph);
|
|
/*mprintf("IPART: %3D [%5D %5D] [%5D %5D] %5D\n", graph->nvtxs, pwgts[0], pwgts[1], graph->pwgts[0], graph->pwgts[1], graph->mincut); */
|
|
|
|
Balance2Way(ctrl, graph, tpwgts, ubfactor);
|
|
/*mprintf("BPART: [%5D %5D] %5D\n", graph->pwgts[0], graph->pwgts[1], graph->mincut);*/
|
|
|
|
FM_2WayEdgeRefine(ctrl, graph, tpwgts, 4);
|
|
/*mprintf("RPART: [%5D %5D] %5D\n", graph->pwgts[0], graph->pwgts[1], graph->mincut);*/
|
|
|
|
if (inbfs == 0 || bestcut > graph->mincut) {
|
|
bestcut = graph->mincut;
|
|
idxcopy(nvtxs, where, bestwhere);
|
|
if (bestcut == 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
graph->mincut = bestcut;
|
|
idxcopy(nvtxs, bestwhere, where);
|
|
|
|
gk_free((void **)&bestwhere, &queue, &touched, LTERM);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*************************************************************************
|
|
* This function takes a graph and produces a bisection by using a region
|
|
* growing algorithm. The resulting partition is returned in
|
|
* graph->where
|
|
**************************************************************************/
|
|
void GrowBisectionNode(CtrlType *ctrl, GraphType *graph, float ubfactor)
|
|
{
|
|
idxtype i, j, k, nvtxs, drain, nleft, first, last, pwgts[2], tpwgts[2],
|
|
minpwgt[2], maxpwgt[2], from, bestcut, icut, mincut, me, pass,
|
|
nbfs, inbfs;
|
|
idxtype *xadj, *vwgt, *adjncy, *adjwgt, *where, *bndind;
|
|
idxtype *queue, *touched, *gain, *bestwhere;
|
|
|
|
nvtxs = graph->nvtxs;
|
|
xadj = graph->xadj;
|
|
vwgt = graph->vwgt;
|
|
adjncy = graph->adjncy;
|
|
adjwgt = graph->adjwgt;
|
|
|
|
bestwhere = idxmalloc(nvtxs, "BisectGraph: bestwhere");
|
|
queue = idxmalloc(nvtxs, "BisectGraph: queue");
|
|
touched = idxmalloc(nvtxs, "BisectGraph: touched");
|
|
|
|
tpwgts[0] = idxsum(nvtxs, vwgt, 1);
|
|
tpwgts[1] = tpwgts[0]/2;
|
|
tpwgts[0] -= tpwgts[1];
|
|
|
|
maxpwgt[0] = ubfactor*tpwgts[0];
|
|
maxpwgt[1] = ubfactor*tpwgts[1];
|
|
minpwgt[0] = (1.0/ubfactor)*tpwgts[0];
|
|
minpwgt[1] = (1.0/ubfactor)*tpwgts[1];
|
|
|
|
/* Allocate refinement memory. Allocate sufficient memory for both edge and node */
|
|
graph->pwgts = idxmalloc(3, "GrowBisectionNode: pwgts");
|
|
graph->where = idxmalloc(nvtxs, "GrowBisectionNode: where");
|
|
graph->bndptr = idxmalloc(nvtxs, "GrowBisectionNode: bndptr");
|
|
graph->bndind = idxmalloc(nvtxs, "GrowBisectionNode: bndind");
|
|
graph->id = idxmalloc(nvtxs, "GrowBisectionNode: id");
|
|
graph->ed = idxmalloc(nvtxs, "GrowBisectionNode: ed");
|
|
graph->nrinfo = (NRInfoType *)gk_malloc(nvtxs*sizeof(NRInfoType), "GrowBisectionNode: nrinfo");
|
|
|
|
|
|
where = graph->where;
|
|
bndind = graph->bndind;
|
|
|
|
nbfs = (nvtxs <= ctrl->CoarsenTo ? SMALLNIPARTS : LARGENIPARTS) + 1;
|
|
for (inbfs=0; inbfs<nbfs; inbfs++) {
|
|
idxset(nvtxs, 0, touched);
|
|
|
|
pwgts[1] = tpwgts[0]+tpwgts[1];
|
|
pwgts[0] = 0;
|
|
|
|
idxset(nvtxs, 1, where);
|
|
|
|
queue[0] = RandomInRange(nvtxs);
|
|
touched[queue[0]] = 1;
|
|
first = 0; last = 1;
|
|
nleft = nvtxs-1;
|
|
drain = 0;
|
|
|
|
/* Start the BFS from queue to get a partition */
|
|
if (nbfs >= 1) {
|
|
for (;;) {
|
|
if (first == last) { /* Empty. Disconnected graph! */
|
|
if (nleft == 0 || drain)
|
|
break;
|
|
|
|
k = RandomInRange(nleft);
|
|
for (i=0; i<nvtxs; i++) {
|
|
if (touched[i] == 0) {
|
|
if (k == 0)
|
|
break;
|
|
else
|
|
k--;
|
|
}
|
|
}
|
|
|
|
queue[0] = i;
|
|
touched[i] = 1;
|
|
first = 0; last = 1;;
|
|
nleft--;
|
|
}
|
|
|
|
i = queue[first++];
|
|
if (pwgts[1]-vwgt[i] < minpwgt[1]) {
|
|
drain = 1;
|
|
continue;
|
|
}
|
|
|
|
where[i] = 0;
|
|
INC_DEC(pwgts[0], pwgts[1], vwgt[i]);
|
|
if (pwgts[1] <= maxpwgt[1])
|
|
break;
|
|
|
|
drain = 0;
|
|
for (j=xadj[i]; j<xadj[i+1]; j++) {
|
|
k = adjncy[j];
|
|
if (touched[k] == 0) {
|
|
queue[last++] = k;
|
|
touched[k] = 1;
|
|
nleft--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*************************************************************
|
|
* Do some partition refinement
|
|
**************************************************************/
|
|
Compute2WayPartitionParams(ctrl, graph);
|
|
Balance2Way(ctrl, graph, tpwgts, ubfactor);
|
|
FM_2WayEdgeRefine(ctrl, graph, tpwgts, 4);
|
|
|
|
/* Construct and refine the vertex separator */
|
|
for (i=0; i<graph->nbnd; i++)
|
|
where[bndind[i]] = 2;
|
|
|
|
Compute2WayNodePartitionParams(ctrl, graph);
|
|
FM_2WayNodeRefine(ctrl, graph, ubfactor, 6);
|
|
|
|
/* mprintf("ISep: [%D %D %D] %D\n", graph->pwgts[0], graph->pwgts[1], graph->pwgts[2], bestcut); */
|
|
|
|
if (inbfs == 0 || bestcut > graph->mincut) {
|
|
bestcut = graph->mincut;
|
|
idxcopy(nvtxs, where, bestwhere);
|
|
}
|
|
}
|
|
|
|
graph->mincut = bestcut;
|
|
idxcopy(nvtxs, bestwhere, where);
|
|
|
|
Compute2WayNodePartitionParams(ctrl, graph);
|
|
|
|
gk_free((void **)&bestwhere, &queue, &touched, LTERM);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
* This function takes a graph and produces a bisection by using a region
|
|
* growing algorithm. The resulting partition is returned in
|
|
* graph->where
|
|
**************************************************************************/
|
|
void RandomBisection(CtrlType *ctrl, GraphType *graph, idxtype *tpwgts, float ubfactor)
|
|
{
|
|
idxtype i, ii, j, k, nvtxs, pwgts[2], minpwgt[2], maxpwgt[2], from, bestcut,
|
|
icut, mincut, me, pass, nbfs, inbfs;
|
|
idxtype *xadj, *vwgt, *adjncy, *adjwgt, *where;
|
|
idxtype *perm, *bestwhere;
|
|
|
|
nvtxs = graph->nvtxs;
|
|
xadj = graph->xadj;
|
|
vwgt = graph->vwgt;
|
|
adjncy = graph->adjncy;
|
|
adjwgt = graph->adjwgt;
|
|
|
|
Allocate2WayPartitionMemory(ctrl, graph);
|
|
where = graph->where;
|
|
|
|
bestwhere = idxmalloc(nvtxs, "BisectGraph: bestwhere");
|
|
perm = idxmalloc(nvtxs, "BisectGraph: queue");
|
|
|
|
ASSERTP(tpwgts[0]+tpwgts[1] == idxsum(nvtxs, vwgt, 1), ("%d %d\n", tpwgts[0]+tpwgts[1], idxsum(nvtxs, vwgt, 1)));
|
|
|
|
maxpwgt[0] = ubfactor*tpwgts[0];
|
|
maxpwgt[1] = ubfactor*tpwgts[1];
|
|
minpwgt[0] = (1.0/ubfactor)*tpwgts[0];
|
|
minpwgt[1] = (1.0/ubfactor)*tpwgts[1];
|
|
|
|
nbfs = (nvtxs <= ctrl->CoarsenTo ? SMALLNIPARTS : LARGENIPARTS);
|
|
for (inbfs=0; inbfs<nbfs; inbfs++) {
|
|
RandomPermute(nvtxs, perm, 1);
|
|
|
|
idxset(nvtxs, 1, where);
|
|
pwgts[1] = tpwgts[0]+tpwgts[1];
|
|
pwgts[0] = 0;
|
|
|
|
|
|
if (nbfs != 1) {
|
|
for (ii=0; ii<nvtxs; ii++) {
|
|
i = perm[ii];
|
|
if (pwgts[0]+vwgt[i] < maxpwgt[0]) {
|
|
where[i] = 0;
|
|
pwgts[0] += vwgt[i];
|
|
pwgts[1] -= vwgt[i];
|
|
if (pwgts[0] > minpwgt[0])
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*************************************************************
|
|
* Do some partition refinement
|
|
**************************************************************/
|
|
Compute2WayPartitionParams(ctrl, graph);
|
|
/* mprintf("IPART: %3D [%5D %5D] [%5D %5D] %5D\n", graph->nvtxs, pwgts[0], pwgts[1], graph->pwgts[0], graph->pwgts[1], graph->mincut); */
|
|
|
|
Balance2Way(ctrl, graph, tpwgts, ubfactor);
|
|
/* mprintf("BPART: [%5D %5D] %5D\n", graph->pwgts[0], graph->pwgts[1], graph->mincut); */
|
|
|
|
FM_2WayEdgeRefine(ctrl, graph, tpwgts, 4);
|
|
/* mprintf("RPART: [%5D %5D] %5D\n", graph->pwgts[0], graph->pwgts[1], graph->mincut); */
|
|
|
|
if (inbfs==0 || bestcut > graph->mincut) {
|
|
bestcut = graph->mincut;
|
|
idxcopy(nvtxs, where, bestwhere);
|
|
if (bestcut == 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
graph->mincut = bestcut;
|
|
idxcopy(nvtxs, bestwhere, where);
|
|
|
|
gk_free((void **)&bestwhere, &perm, LTERM);
|
|
}
|
|
|
|
|
|
|
|
|