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/*
* Copyright 1997, Regents of the University of Minnesota
*
* weird.c
*
* This file contain various graph setting up routines
*
* Started 10/19/96
* George
*
* $Id: weird.c,v 1.9 2003/07/31 16:27:28 karypis Exp $
*
*/
#include <parmetislib.h>
/*************************************************************************
* This function computes a partitioning of a small graph
**************************************************************************/
void PartitionSmallGraph(CtrlType *ctrl, GraphType *graph, WorkSpaceType *wspace)
{
int i, h, ncon, nparts, npes, mype;
int moptions[10];
int mynumflag, mywgtflag, me;
idxtype *mypart;
int lpecut[2], gpecut[2];
GraphType *agraph;
int *sendcounts, *displs;
float *mytpwgts, *gnpwgts, *lnpwgts;
ncon = graph->ncon;
nparts = ctrl->nparts;
MPI_Comm_size(ctrl->comm, &npes);
MPI_Comm_rank(ctrl->comm, &mype);
SetUp(ctrl, graph, wspace);
graph->where = idxmalloc(graph->nvtxs+graph->nrecv, "PartitionSmallGraph: where");
agraph = Moc_AssembleAdaptiveGraph(ctrl, graph, wspace);
mypart = idxmalloc(agraph->nvtxs, "mypart");
moptions[0] = 0;
moptions[7] = ctrl->sync + mype;
mynumflag = 0;
mywgtflag = 3;
if (ncon == 1) {
METIS_WPartGraphKway2(&agraph->nvtxs, agraph->xadj, agraph->adjncy, agraph->vwgt,
agraph->adjwgt, &mywgtflag, &mynumflag, &nparts, ctrl->tpwgts, moptions,
&graph->mincut, mypart);
}
else {
mytpwgts = fmalloc(nparts, "mytpwgts");
for (i=0; i<nparts; i++)
mytpwgts[i] = ctrl->tpwgts[i*ncon];
METIS_mCPartGraphRecursive2(&agraph->nvtxs, &ncon, agraph->xadj, agraph->adjncy,
agraph->vwgt, agraph->adjwgt, &mywgtflag, &mynumflag, &nparts, mytpwgts,
moptions, &graph->mincut, mypart);
free(mytpwgts);
}
lpecut[0] = graph->mincut;
lpecut[1] = mype;
MPI_Allreduce(lpecut, gpecut, 1, MPI_2INT, MPI_MINLOC, ctrl->comm);
graph->mincut = gpecut[0];
if (lpecut[1] == gpecut[1] && gpecut[1] != 0)
MPI_Send((void *)mypart, agraph->nvtxs, IDX_DATATYPE, 0, 1, ctrl->comm);
if (lpecut[1] == 0 && gpecut[1] != 0)
MPI_Recv((void *)mypart, agraph->nvtxs, IDX_DATATYPE, gpecut[1], 1, ctrl->comm, &ctrl->status);
sendcounts = imalloc(npes, "sendcounts");
displs = imalloc(npes, "displs");
for (i=0; i<npes; i++) {
sendcounts[i] = graph->vtxdist[i+1]-graph->vtxdist[i];
displs[i] = graph->vtxdist[i];
}
MPI_Scatterv((void *)mypart, sendcounts, displs, IDX_DATATYPE,
(void *)graph->where, graph->nvtxs, IDX_DATATYPE, 0, ctrl->comm);
lnpwgts = graph->lnpwgts = fmalloc(nparts*ncon, "lnpwgts");
gnpwgts = graph->gnpwgts = fmalloc(nparts*ncon, "gnpwgts");
sset(nparts*ncon, 0, lnpwgts);
for (i=0; i<graph->nvtxs; i++) {
me = graph->where[i];
for (h=0; h<ncon; h++)
lnpwgts[me*ncon+h] += graph->nvwgt[i*ncon+h];
}
MPI_Allreduce((void *)lnpwgts, (void *)gnpwgts, nparts*ncon, MPI_FLOAT, MPI_SUM, ctrl->comm);
GKfree((void**)&mypart, (void**)&sendcounts, (void**)&displs, LTERM);
FreeGraph(agraph);
return;
}
/*************************************************************************
* This function checks the inputs for the partitioning routines
**************************************************************************/
void CheckInputs(int partType, int npes, int dbglvl, int *wgtflag, int *iwgtflag,
int *numflag, int *inumflag, int *ncon, int *incon, int *nparts,
int *inparts, float *tpwgts, float **itpwgts, float *ubvec,
float *iubvec, float *ipc2redist, float *iipc2redist, int *options,
int *ioptions, idxtype *part, MPI_Comm *comm)
{
int i, j;
int doweabort, doiabort = 0;
float tsum, *myitpwgts;
int mgcnums[5] = {-1, 2, 3, 4, 2};
/**************************************/
if (part == NULL) {
doiabort = 1;
IFSET(dbglvl, DBG_INFO, printf("ERROR: part array is set to NULL.\n"));
}
/**************************************/
/**************************************/
if (wgtflag == NULL) {
*iwgtflag = 0;
IFSET(dbglvl, DBG_INFO, printf("WARNING: wgtflag is NULL. Using a value of 0.\n"));
}
else {
*iwgtflag = *wgtflag;
}
/**************************************/
/**************************************/
if (numflag == NULL) {
*inumflag = 0;
IFSET(dbglvl, DBG_INFO, printf("WARNING: numflag is NULL. Using a value of 0.\n"));
}
else {
if (*numflag != 0 && *numflag != 1) {
IFSET(dbglvl, DBG_INFO, printf("WARNING: bad value for numflag %d. Using a value of 0.\n", *numflag));
*inumflag = 0;
}
else {
*inumflag = *numflag;
}
}
/**************************************/
/**************************************/
if (ncon == NULL) {
*incon = 1;
IFSET(dbglvl, DBG_INFO, printf("WARNING: ncon is NULL. Using a value of 1.\n"));
}
else {
if (*ncon < 1 || *ncon > MAXNCON) {
IFSET(dbglvl, DBG_INFO, printf("WARNING: bad value for ncon %d. Using a value of 1.\n", *ncon));
*incon = 1;
}
else {
*incon = *ncon;
}
}
/**************************************/
/**************************************/
if (nparts == NULL) {
*inparts = npes;
IFSET(dbglvl, DBG_INFO, printf("WARNING: nparts is NULL. Using a value of %d.\n", npes));
}
else {
if (*nparts < 1 || *nparts > MAX_NPARTS) {
IFSET(dbglvl, DBG_INFO, printf("WARNING: bad value for nparts %d. Using a value of %d.\n", *nparts, npes));
*inparts = npes;
}
else {
*inparts = *nparts;
}
}
/**************************************/
/**************************************/
myitpwgts = *itpwgts = fmalloc((*inparts)*(*incon), "CheckInputs: itpwgts");
if (tpwgts == NULL) {
sset((*inparts)*(*incon), 1.0/(float)(*inparts), myitpwgts);
IFSET(dbglvl, DBG_INFO, printf("WARNING: tpwgts is NULL. Setting all array elements to %.3f.\n", 1.0/(float)(*inparts)));
}
else {
for (i=0; i<*incon; i++) {
tsum = 0.0;
for (j=0; j<*inparts; j++) {
tsum += tpwgts[j*(*incon)+i];
}
if (fabs(1.0-tsum) < SMALLFLOAT)
tsum = 1.0;
for (j=0; j<*inparts; j++)
myitpwgts[j*(*incon)+i] = tpwgts[j*(*incon)+i] / tsum;
}
}
/**************************************/
/**************************************/
if (ubvec == NULL) {
sset(*incon, 1.05, iubvec);
IFSET(dbglvl, DBG_INFO, printf("WARNING: ubvec is NULL. Setting all array elements to 1.05.\n"));
}
else {
for (i=0; i<*incon; i++) {
if (ubvec[i] < 1.0 || ubvec[i] > (float)(*inparts)) {
iubvec[i] = 1.05;
IFSET(dbglvl, DBG_INFO, printf("WARNING: bad value for ubvec[%d]: %.3f. Setting value to 1.05.[%d]\n", i, ubvec[i], *inparts));
}
else {
iubvec[i] = ubvec[i];
}
}
}
/**************************************/
/**************************************/
if (partType == ADAPTIVE_PARTITION) {
if (ipc2redist != NULL) {
if (*ipc2redist < SMALLFLOAT || *ipc2redist > 1000000.0) {
IFSET(dbglvl, DBG_INFO, printf("WARNING: bad value for ipc2redist %.3f. Using a value of 1000.\n", *ipc2redist));
*iipc2redist = 1000.0;
}
else {
*iipc2redist = *ipc2redist;
}
}
else {
IFSET(dbglvl, DBG_INFO, printf("WARNING: ipc2redist is NULL. Using a value of 1000.\n"));
*iipc2redist = 1000.0;
}
}
/**************************************/
/**************************************/
if (options == NULL) {
ioptions[0] = 0;
IFSET(dbglvl, DBG_INFO, printf("WARNING: options is NULL. Using defaults\n"));
}
else {
ioptions[0] = options[0];
ioptions[1] = options[1];
ioptions[2] = options[2];
if (partType == ADAPTIVE_PARTITION || partType == REFINE_PARTITION)
ioptions[3] = options[3];
}
/**************************************/
/**************************************/
if (comm == NULL) {
IFSET(dbglvl, DBG_INFO, printf("ERROR: comm is NULL. Aborting\n"));
abort();
}
else {
MPI_Allreduce((void *)&doiabort, (void *)&doweabort, 1, MPI_INT, MPI_MAX, *comm);
if (doweabort > 0)
abort();
}
/**************************************/
}
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