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118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/*
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* Copyright 1997, Regents of the University of Minnesota
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*
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* adrivers.c
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*
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* This file contains the driving routines for the various parallel
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* multilevel partitioning and repartitioning algorithms
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*
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* Started 11/19/96
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* George
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*
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* $Id: adrivers.c,v 1.5 2003/07/30 18:37:58 karypis Exp $
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*
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*/
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#include <parmetislib.h>
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/*************************************************************************
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* This function is the driver for the adaptive refinement mode of ParMETIS
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**************************************************************************/
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void Adaptive_Partition(CtrlType *ctrl, GraphType *graph, WorkSpaceType *wspace)
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{
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int i;
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int tewgt, tvsize;
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float gtewgt, gtvsize;
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float ubavg, lbavg, lbvec[MAXNCON];
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/************************************/
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/* Set up important data structures */
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/************************************/
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SetUp(ctrl, graph, wspace);
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ubavg = savg(graph->ncon, ctrl->ubvec);
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tewgt = idxsum(graph->nedges, graph->adjwgt);
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tvsize = idxsum(graph->nvtxs, graph->vsize);
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gtewgt = (float) GlobalSESum(ctrl, tewgt) + 1.0; /* The +1 were added to remove any FPE */
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gtvsize = (float) GlobalSESum(ctrl, tvsize) + 1.0;
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ctrl->redist_factor = ctrl->redist_base * ((gtewgt/gtvsize)/ ctrl->edge_size_ratio);
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IFSET(ctrl->dbglvl, DBG_PROGRESS, rprintf(ctrl, "[%6d %8d %5d %5d][%d]\n",
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graph->gnvtxs, GlobalSESum(ctrl, graph->nedges), GlobalSEMin(ctrl, graph->nvtxs), GlobalSEMax(ctrl, graph->nvtxs), ctrl->CoarsenTo));
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if (graph->gnvtxs < 1.3*ctrl->CoarsenTo ||
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(graph->finer != NULL && graph->gnvtxs > graph->finer->gnvtxs*COARSEN_FRACTION)) {
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/***********************************************/
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/* Balance the partition on the coarsest graph */
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/***********************************************/
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graph->where = idxsmalloc(graph->nvtxs+graph->nrecv, -1, "graph->where");
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idxcopy(graph->nvtxs, graph->home, graph->where);
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Moc_ComputeParallelBalance(ctrl, graph, graph->where, lbvec);
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lbavg = savg(graph->ncon, lbvec);
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if (lbavg > ubavg + 0.035 && ctrl->partType != REFINE_PARTITION)
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Balance_Partition(ctrl, graph, wspace);
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if (ctrl->dbglvl&DBG_PROGRESS) {
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Moc_ComputeParallelBalance(ctrl, graph, graph->where, lbvec);
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rprintf(ctrl, "nvtxs: %10d, balance: ", graph->gnvtxs);
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for (i=0; i<graph->ncon; i++)
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rprintf(ctrl, "%.3f ", lbvec[i]);
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rprintf(ctrl, "\n");
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}
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/* check if no coarsening took place */
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if (graph->finer == NULL) {
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Moc_ComputePartitionParams(ctrl, graph, wspace);
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Moc_KWayBalance(ctrl, graph, wspace, graph->ncon);
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Moc_KWayAdaptiveRefine(ctrl, graph, wspace, NGR_PASSES);
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}
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}
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else {
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/*******************************/
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/* Coarsen it and partition it */
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/*******************************/
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switch (ctrl->ps_relation) {
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case COUPLED:
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Mc_LocalMatch_HEM(ctrl, graph, wspace);
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break;
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case DISCOUPLED:
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default:
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Moc_GlobalMatch_Balance(ctrl, graph, wspace);
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break;
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}
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Adaptive_Partition(ctrl, graph->coarser, wspace);
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/********************************/
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/* project partition and refine */
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/********************************/
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Moc_ProjectPartition(ctrl, graph, wspace);
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Moc_ComputePartitionParams(ctrl, graph, wspace);
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if (graph->ncon > 1 && graph->level < 4) {
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Moc_ComputeParallelBalance(ctrl, graph, graph->where, lbvec);
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lbavg = savg(graph->ncon, lbvec);
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if (lbavg > ubavg + 0.025) {
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Moc_KWayBalance(ctrl, graph, wspace, graph->ncon);
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}
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}
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Moc_KWayAdaptiveRefine(ctrl, graph, wspace, NGR_PASSES);
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if (ctrl->dbglvl&DBG_PROGRESS) {
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Moc_ComputeParallelBalance(ctrl, graph, graph->where, lbvec);
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rprintf(ctrl, "nvtxs: %10d, cut: %8d, balance: ", graph->gnvtxs, graph->mincut);
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for (i=0; i<graph->ncon; i++)
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rprintf(ctrl, "%.3f ", lbvec[i]);
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rprintf(ctrl, "\n");
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}
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}
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}
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