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/* Copyright 2007 ENSEIRB, INRIA & CNRS
**
** This file is part of the Scotch software package for static mapping,
** graph partitioning and sparse matrix ordering.
**
** This software is governed by the CeCILL-C license under French law
** and abiding by the rules of distribution of free software. You can
** use, modify and/or redistribute the software under the terms of the
** CeCILL-C license as circulated by CEA, CNRS and INRIA at the following
** URL: "http://www.cecill.info".
**
** As a counterpart to the access to the source code and rights to copy,
** modify and redistribute granted by the license, users are provided
** only with a limited warranty and the software's author, the holder of
** the economic rights, and the successive licensors have only limited
** liability.
**
** In this respect, the user's attention is drawn to the risks associated
** with loading, using, modifying and/or developing or reproducing the
** software by the user in light of its specific status of free software,
** that may mean that it is complicated to manipulate, and that also
** therefore means that it is reserved for developers and experienced
** professionals having in-depth computer knowledge. Users are therefore
** encouraged to load and test the software's suitability as regards
** their requirements in conditions enabling the security of their
** systems and/or data to be ensured and, more generally, to use and
** operate it in the same conditions as regards security.
**
** The fact that you are presently reading this means that you have had
** knowledge of the CeCILL-C license and that you accept its terms.
*/
/************************************************************/
/** **/
/** NAME : vdgraph_separate_st.c **/
/** **/
/** AUTHOR : Francois PELLEGRINI **/
/** Cedric CHEVALIER **/
/** **/
/** FUNCTION : This module contains the global **/
/** distributed separation strategy and **/
/** method tables. **/
/** **/
/** DATES : # Version 5.0 : from : 16 feb 2006 **/
/** to 01 aug 2007 **/
/** **/
/************************************************************/
/*
** The defines and includes.
*/
#define VDGRAPH_SEPARATE_ST
#include "module.h"
#include "common.h"
#include "parser.h"
#include "graph.h"
#include "vgraph.h"
#include "vgraph_separate_st.h"
#include "dgraph.h"
#include "dgraph_coarsen.h"
#include "vdgraph.h"
#include "vdgraph_separate_bd.h"
#include "vdgraph_separate_ml.h"
#include "vdgraph_separate_sq.h"
#include "vdgraph_separate_st.h"
#include "vdgraph_separate_zr.h"
/*
** The static and global variables.
*/
static Vdgraph vdgraphdummy; /* Dummy distributed separator graph for offset computations */
static union {
VdgraphSeparateBdParam param;
StratNodeMethodData padding;
} vdgraphseparatedefaultbd = { { 3, &stratdummy } };
static union {
VdgraphSeparateMlParam param;
StratNodeMethodData padding;
} vdgraphseparatedefaultml = { { 1000, 100, 0, 0.8L, 1000, &stratdummy, &stratdummy, &stratdummy, 1 } };
static union {
VdgraphSeparateSqParam param;
StratNodeMethodData padding;
} vdgraphseparatedefaultsq = { { &stratdummy } };
static StratMethodTab vdgraphseparatestmethtab[] = { /* Distributed graph separation methods array */
{ VDGRAPHSEPASTMETHBD, "b", vdgraphSeparateBd, &vdgraphseparatedefaultbd },
{ VDGRAPHSEPASTMETHML, "m", vdgraphSeparateMl, &vdgraphseparatedefaultml },
{ VDGRAPHSEPASTMETHSQ, "q", vdgraphSeparateSq, &vdgraphseparatedefaultsq },
{ VDGRAPHSEPASTMETHZR, "z", vdgraphSeparateZr, NULL },
{ -1, NULL, NULL, NULL } };
static StratParamTab vdgraphseparatestparatab[] = { /* Distributed graph separation method parameter list */
{ VDGRAPHSEPASTMETHBD, STRATPARAMINT, "width",
(byte *) &vdgraphseparatedefaultbd.param,
(byte *) &vdgraphseparatedefaultbd.param.distmax,
NULL },
{ VDGRAPHSEPASTMETHBD, STRATPARAMSTRAT, "strat",
(byte *) &vdgraphseparatedefaultbd.param,
(byte *) &vdgraphseparatedefaultbd.param.strat,
(void *) &vdgraphseparateststratab },
{ VDGRAPHSEPASTMETHML, STRATPARAMSTRAT, "asc",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.stratasc,
(void *) &vdgraphseparateststratab },
{ VDGRAPHSEPASTMETHML, STRATPARAMSTRAT, "low",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.stratlow,
(void *) &vdgraphseparateststratab },
{ VDGRAPHSEPASTMETHML, STRATPARAMSTRAT, "seq",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.stratseq,
(void *) &vdgraphseparateststratab },
{ VDGRAPHSEPASTMETHML, STRATPARAMINT, "proc",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.seqnbr,
NULL },
{ VDGRAPHSEPASTMETHML, STRATPARAMINT, "vert",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.coarnbr,
NULL },
{ VDGRAPHSEPASTMETHML, STRATPARAMINT, "dvert",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.dupmax,
NULL },
{ VDGRAPHSEPASTMETHML, STRATPARAMINT, "dlevl",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.duplvlmax,
NULL },
{ VDGRAPHSEPASTMETHML, STRATPARAMINT, "reqsize",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.reqsize,
NULL },
{ VDGRAPHSEPASTMETHML, STRATPARAMDOUBLE, "rat",
(byte *) &vdgraphseparatedefaultml.param,
(byte *) &vdgraphseparatedefaultml.param.coarrat,
NULL },
{ VDGRAPHSEPASTMETHSQ, STRATPARAMSTRAT, "strat",
(byte *) &vdgraphseparatedefaultsq.param,
(byte *) &vdgraphseparatedefaultsq.param.strat,
(void *) &vgraphseparateststratab },
{ VDGRAPHSEPASTMETHNBR, STRATPARAMINT, NULL,
NULL, NULL, NULL } };
static StratParamTab vdgraphseparatestcondtab[] = { /* Distributed graph condition parameter table */
{ STRATNODECOND, STRATPARAMINT, "edge",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.s.edgeglbnbr,
NULL },
{ STRATNODECOND, STRATPARAMINT, "levl",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.levlnum,
NULL },
{ STRATNODECOND, STRATPARAMINT, "load",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.s.veloglbsum,
NULL },
{ STRATNODECOND, STRATPARAMINT, "proc",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.s.procglbnbr,
NULL },
{ STRATNODECOND, STRATPARAMINT, "rank",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.s.proclocnum,
NULL },
{ STRATNODECOND, STRATPARAMINT, "vert",
(byte *) &vdgraphdummy,
(byte *) &vdgraphdummy.s.vertglbnbr,
NULL },
{ STRATNODENBR, STRATPARAMINT, NULL,
NULL, NULL, NULL } };
StratTab vdgraphseparateststratab = { /* Strategy tables for distributed vertex separation methods */
vdgraphseparatestmethtab,
vdgraphseparatestparatab,
vdgraphseparatestcondtab };
/*******************************************/
/* */
/* This is the generic separation routine. */
/* */
/*******************************************/
/* This routine computes the separation of the
** given distributed graph according to the given
** strategy.
** All distributed vertex separation routines must
** be collective, that is, they must all return
** the same success or failure return value on all
** of the processors onto which they are run. Else,
** the behavior of the software is unpredictable.
** It returns:
** - 0 : on success.
** - !0 : on error.
*/
int
vdgraphSeparateSt (
Vdgraph * restrict const grafptr, /*+ Distributed separation graph +*/
const Strat * restrict const strat) /*+ Separation strategy +*/
{
StratTest val;
VdgraphStore savetab[2]; /* Results of the two strategies */
int o;
#ifdef SCOTCH_DEBUG_VDGRAPH2
MPI_Comm proccommold; /* Save area for old communicator */
#endif /* SCOTCH_DEBUG_VDGRAPH2 */
#ifdef SCOTCH_DEBUG_VDGRAPH2
if (sizeof (Gnum) != sizeof (INT)) {
errorPrint ("vdgraphSeparateSt: invalid type specification for parser variables");
return (1);
}
if (sizeof (VdgraphSeparateSqParam) > sizeof (StratNodeMethodData)) {
errorPrint ("vdgraphSeparateSt: invalid type specification");
return (1);
}
#endif /* SCOTCH_DEBUG_VDGRAPH2 */
#ifdef SCOTCH_DEBUG_VDGRAPH1
if ((strat->tabl != &vdgraphseparateststratab) &&
(strat != &stratdummy)) {
errorPrint ("vdgraphSeparateSt: invalid parameter (1)");
return (1);
}
#endif /* SCOTCH_DEBUG_VDGRAPH1 */
o = 0;
switch (strat->type) {
case STRATNODECONCAT :
o = vdgraphSeparateSt (grafptr, strat->data.concat.strat[0]); /* Apply first strategy */
if (o == 0) /* If it worked all right */
o |= vdgraphSeparateSt (grafptr, strat->data.concat.strat[1]); /* Then apply second strategy */
break;
case STRATNODECOND :
o = stratTestEval (strat->data.cond.test, &val, (void *) grafptr); /* Evaluate expression */
if (o == 0) { /* If evaluation was correct */
#ifdef SCOTCH_DEBUG_VDGRAPH2
if ((val.typetest != STRATTESTVAL) ||
(val.typenode != STRATPARAMLOG)) {
errorPrint ("vdgraphSeparateSt: invalid test result");
o = 1;
break;
}
#endif /* SCOTCH_DEBUG_VDGRAPH2 */
if (val.data.val.vallog == 1) /* If expression is true */
o = vdgraphSeparateSt (grafptr, strat->data.cond.strat[0]); /* Apply first strategy */
else { /* Else if expression is false */
if (strat->data.cond.strat[1] != NULL) /* And if there is an else statement */
o = vdgraphSeparateSt (grafptr, strat->data.cond.strat[1]); /* Apply second strategy */
}
}
break;
case STRATNODEEMPTY :
break;
case STRATNODESELECT : /* TODO: Can be multithreaded! */
if (((vdgraphStoreInit (grafptr, &savetab[0])) != 0) || /* Allocate save areas */
((vdgraphStoreInit (grafptr, &savetab[1])) != 0)) {
errorPrint ("vdgraphSeparateSt: out of memory");
vdgraphStoreExit (&savetab[0]);
return (1);
}
vdgraphStoreSave (grafptr, &savetab[1]); /* Save initial bipartition */
if (vdgraphSeparateSt (grafptr, strat->data.select.strat[0]) != 0) { /* If first strategy didn't work */
vdgraphStoreUpdt (grafptr, &savetab[1]); /* Restore initial bipartition */
vdgraphStoreSave (grafptr, &savetab[0]); /* Save it as result */
}
else { /* First strategy worked */
vdgraphStoreSave (grafptr, &savetab[0]); /* Save its result */
vdgraphStoreUpdt (grafptr, &savetab[1]); /* Restore initial bipartition */
}
if (vdgraphSeparateSt (grafptr, strat->data.select.strat[1]) != 0) /* If second strategy didn't work */
vdgraphStoreUpdt (grafptr, &savetab[1]); /* Restore initial bipartition as its result */
if ( (savetab[0].fronglbnbr < grafptr->fronglbnbr) || /* If first strategy is better */
((savetab[0].fronglbnbr == grafptr->fronglbnbr) &&
(abs (savetab[0].compglbloaddlt) < abs (grafptr->compglbloaddlt))))
vdgraphStoreUpdt (grafptr, &savetab[0]); /* Restore its result */
vdgraphStoreExit (&savetab[0]); /* Free both save areas */
vdgraphStoreExit (&savetab[1]);
break;
#ifdef SCOTCH_DEBUG_VDGRAPH1
case STRATNODEMETHOD :
#else /* SCOTCH_DEBUG_VDGRAPH1 */
default :
#endif /* SCOTCH_DEBUG_VDGRAPH1 */
#ifdef SCOTCH_DEBUG_VDGRAPH2
proccommold = grafptr->s.proccomm; /* Create new communicator to isolate method communications */
MPI_Comm_dup (proccommold, &grafptr->s.proccomm);
#endif /* SCOTCH_DEBUG_VDGRAPH2 */
o = strat->tabl->methtab[strat->data.method.meth].func (grafptr, (void *) &strat->data.method.data);
#ifdef SCOTCH_DEBUG_VDGRAPH2
MPI_Comm_free (&grafptr->s.proccomm); /* Restore old communicator */
grafptr->s.proccomm = proccommold;
#endif /* SCOTCH_DEBUG_VDGRAPH2 */
#ifdef SCOTCH_DEBUG_VDGRAPH1
break;
default :
errorPrint ("vdgraphSeparateSt: invalid parameter (2)");
return (1);
#endif /* SCOTCH_DEBUG_VDGRAPH1 */
}
return (o);
}
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