97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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* mcoarsen.c
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*
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* This file contains the driving routines for the coarsening process
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*
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* Started 7/23/97
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* George
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*
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* $Id: mcoarsen.c,v 1.3 2003/07/31 15:52:47 karypis Exp $
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*
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*/
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#include <metislib.h>
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/*************************************************************************
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* This function takes a graph and creates a sequence of coarser graphs
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**************************************************************************/
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GraphType *MCCoarsen2Way(CtrlType *ctrl, GraphType *graph)
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{
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idxtype i, clevel;
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GraphType *cgraph;
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IFSET(ctrl->dbglvl, DBG_TIME, gk_startcputimer(ctrl->CoarsenTmr));
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cgraph = graph;
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clevel = 0;
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do {
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if (ctrl->dbglvl&DBG_COARSEN) {
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mprintf("%6D %7D %10D [%D] [%6.4f", cgraph->nvtxs, cgraph->nedges,
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idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1), ctrl->CoarsenTo, ctrl->nmaxvwgt);
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for (i=0; i<graph->ncon; i++)
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mprintf(" %5.3f", gk_fsum(cgraph->nvtxs, cgraph->nvwgt+i, cgraph->ncon));
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mprintf("]\n");
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}
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if (cgraph->nedges == 0) {
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MCMatch_RM(ctrl, cgraph);
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}
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else {
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switch (ctrl->CType) {
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case MTYPE_RM:
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MCMatch_RM(ctrl, cgraph);
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break;
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case MTYPE_HEM:
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if (clevel < 1)
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MCMatch_RM(ctrl, cgraph);
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else
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MCMatch_HEM(ctrl, cgraph);
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break;
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case MTYPE_SHEM:
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if (clevel < 1)
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MCMatch_RM(ctrl, cgraph);
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else
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MCMatch_SHEM(ctrl, cgraph);
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break;
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case MTYPE_SHEMKWAY:
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MCMatch_SHEM(ctrl, cgraph);
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break;
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case MTYPE_SHEBM_ONENORM:
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MCMatch_SHEBM(ctrl, cgraph, 1);
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break;
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case MTYPE_SHEBM_INFNORM:
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MCMatch_SHEBM(ctrl, cgraph, -1);
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break;
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case MTYPE_SBHEM_ONENORM:
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MCMatch_SBHEM(ctrl, cgraph, 1);
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break;
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case MTYPE_SBHEM_INFNORM:
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MCMatch_SBHEM(ctrl, cgraph, -1);
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break;
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default:
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errexit("Unknown CType: %d\n", ctrl->CType);
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}
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}
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cgraph = cgraph->coarser;
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clevel++;
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} while (cgraph->nvtxs > ctrl->CoarsenTo && cgraph->nvtxs < COARSEN_FRACTION2*cgraph->finer->nvtxs && cgraph->nedges > cgraph->nvtxs/2);
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if (ctrl->dbglvl&DBG_COARSEN) {
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mprintf("%6D %7D %10D [%D] [%6.4f", cgraph->nvtxs, cgraph->nedges,
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idxsum(cgraph->nvtxs, cgraph->adjwgtsum, 1), ctrl->CoarsenTo, ctrl->nmaxvwgt);
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for (i=0; i<graph->ncon; i++)
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mprintf(" %5.3f", gk_fsum(cgraph->nvtxs, cgraph->nvwgt+i, cgraph->ncon));
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mprintf("]\n");
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}
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IFSET(ctrl->dbglvl, DBG_TIME, gk_stopcputimer(ctrl->CoarsenTmr));
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return cgraph;
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}
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