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/* orderViaMMD.c */
#include "../MSMD.h"
#include "../../DSTree.h"
#include "../../timings.h"
/*--------------------------------------------------------------------*/
int
main ( int argc, char *argv[] )
/*
------------------------------------------------------------
order a graph using the multiple minimum degree method.
we read in
(1) a Graph object
(2) ordering parameters
and output (optionally)
(1) and ETree front tree object
(2) old-to-new IV object
(3) new-to-old IV object
created -- 96nov01, cca
------------------------------------------------------------
*/
{
char *inGraphFileName, *msgFileName,
*outETreeFileName, *outNewToOldIVfileName,
*outOldToNewIVfileName ;
double cpu, ops, t1, t2 ;
ETree *etree ;
FILE *msgFile ;
Graph *g ;
int compressFlag, ierr, msglvl, nfind, nvtx, nzf,
prioType, rc, seed, stepType ;
int *stages ;
IV *newToOldIV, *oldToNewIV ;
MSMD *msmd ;
MSMDinfo *msmdinfo ;
if ( argc != 11 ) {
fprintf(stdout,
"\n\n usage : %s msglvl msgFile inGraphFile seed compressFlag prioType"
"\n stepType oldToNewIVfile newToOldIVfile frontTreeFile "
"\n msglvl -- message level"
"\n msgFile -- message file"
"\n inGraphFile -- input file, must be *.graphf or *.graphb"
"\n seed -- random number seed"
"\n compressFlag -- compression flag"
"\n compressFlag / 4 >= 1 --> compress before elimination"
"\n compressFlag %% 4 == 2 --> compress at each elimination step,"
"\n consider all nodes"
"\n compressFlag %% 4 == 1 --> compress at each elimination step,"
"\n but only consider 2-adj nodes"
"\n compressFlag %% 4 == 0 --> do not perform any compression"
"\n prioType -- update type"
"\n prioType == 1 --> true updates"
"\n prioType == 2 --> approximate updates"
"\n prioType == 3 --> half and half"
"\n prioType == 4 --> maximal independent set"
"\n stepType -- degree extent for independent set elimination"
"\n when stepType < 1 --> only one node is eliminated at a step,"
"\n e.g., like QMD from SPARSPAK and YSMP"
"\n stepType == 1 --> regular multiple elimination, e.g., GENMMD"
"\n stepType > 1 --> extended multiple elimination"
"\n an independent set of nodes is selected for elimination"
"\n whose degree satisfies mindeg <= degree <= stepType*mindegree"
"\n oldToNewIVfile -- file for old-to-new IV object"
"\n newToOldIVfile -- file for new-to-old IV object"
"\n frontTreeFile -- file for front tree's ETree object"
"\n", argv[0]) ;
return(0) ;
}
msglvl = atoi(argv[1]) ;
msgFileName = argv[2] ;
if ( strcmp(msgFileName, "stdout") == 0 ) {
msgFile = stdout ;
} else if ( (msgFile = fopen(msgFileName, "a")) == NULL ) {
fprintf(stderr, "\n fatal error in %s"
"\n unable to open file %s\n",
argv[0], msgFileName) ;
return(-1) ;
}
inGraphFileName = argv[3] ;
seed = atoi(argv[4]) ;
compressFlag = atoi(argv[5]) ;
prioType = atoi(argv[6]) ;
stepType = atoi(argv[7]) ;
outETreeFileName = argv[8] ;
outOldToNewIVfileName = argv[9] ;
outNewToOldIVfileName = argv[10] ;
fprintf(msgFile,
"\n %s : "
"\n msglvl -- %d"
"\n msgFile -- %s"
"\n inGraphFile -- %s"
"\n seed -- %d"
"\n compressFlag -- %d"
"\n prioType -- %d"
"\n stepType -- %d"
"\n outETreeFile -- %s"
"\n outOldToNewFile -- %s"
"\n outNewToOldFile -- %s"
"\n", argv[0], msglvl, msgFileName, inGraphFileName, seed,
compressFlag, prioType, stepType, outETreeFileName,
outOldToNewIVfileName, outNewToOldIVfileName) ;
fflush(msgFile) ;
/*
------------------------------------------
initialize the MSMDinfo information object
------------------------------------------
*/
msmdinfo = MSMDinfo_new() ;
msmdinfo->seed = seed ;
msmdinfo->compressFlag = compressFlag ;
msmdinfo->prioType = prioType ;
msmdinfo->stepType = stepType ;
msmdinfo->msglvl = msglvl ;
msmdinfo->msgFile = msgFile ;
/*
------------------------
read in the Graph object
------------------------
*/
if ( strcmp(inGraphFileName, "none") == 0 ) {
fprintf(msgFile, "\n no file to read from") ;
exit(0) ;
}
MARKTIME(t1) ;
g = Graph_new() ;
Graph_setDefaultFields(g) ;
if ( (rc = Graph_readFromFile(g, inGraphFileName)) != 1 ) {
fprintf(msgFile, "\n return value %d from Graph_readFromFile(%p,%s)",
rc, g, inGraphFileName) ;
exit(-1) ;
}
MARKTIME(t2) ;
fprintf(msgFile, "\n CPU %9.5f : read in graph from file %s",
t2 - t1, inGraphFileName) ;
nvtx = g->nvtx ;
if ( msglvl < 4 ) {
Graph_writeStats(g, msgFile) ;
fflush(msgFile) ;
} else {
Graph_writeForHumanEye(g, msgFile) ;
fflush(msgFile) ;
}
/*
------------------------
create the stages vector
------------------------
*/
stages = NULL ;
/*
--------------
order via msmd
--------------
*/
MARKTIME(t1) ;
msmd = MSMD_new() ;
MSMD_order(msmd, g, stages, msmdinfo) ;
MARKTIME(t2) ;
cpu = t2 - t1 ;
fprintf(msgFile, "\n CPU %9.5f : order the graph", cpu) ;
fflush(msgFile) ;
MSMDinfo_print(msmdinfo, msgFile) ;
fflush(msgFile) ;
/*
----------------------
extract the front tree
----------------------
*/
MARKTIME(t1) ;
etree = MSMD_frontETree(msmd) ;
nfind = ETree_nFactorIndices(etree) ;
nzf = ETree_nFactorEntries(etree, SPOOLES_SYMMETRIC) ;
ops = ETree_nFactorOps(etree, SPOOLES_REAL, SPOOLES_SYMMETRIC) ;
MARKTIME(t2) ;
fprintf(msgFile,
"\n\n CPU %9.5f : make the front tree", t2 - t1) ;
fprintf(msgFile,
"\n FACTOR : %9d indices, %9d entries, %9.0f operations",
nfind, nzf, ops) ;
if ( msglvl < 3 ) {
ETree_writeStats(etree, msgFile) ;
fflush(msgFile) ;
} else {
ETree_writeForHumanEye(etree, msgFile) ;
fflush(msgFile) ;
}
fprintf(msgFile, "\n STATSMMD %10d %10.0f %8.3f", nzf, ops, cpu) ;
/*
-------------------------------------------
write the front tree to a file if requested
-------------------------------------------
*/
if ( strcmp(outETreeFileName, "none") != 0 ) {
ETree_writeToFile(etree, outETreeFileName) ;
}
/*
-----------------------------------------------------------------
generate the permutation vectors and write to a file if requested
-----------------------------------------------------------------
*/
if ( strcmp(outOldToNewIVfileName, "none") != 0 ) {
oldToNewIV = IV_new() ;
} else {
oldToNewIV = NULL ;
}
if ( strcmp(outNewToOldIVfileName, "none") != 0 ) {
newToOldIV = IV_new() ;
} else {
newToOldIV = NULL ;
}
if ( oldToNewIV != NULL || newToOldIV != NULL ) {
MSMD_fillPerms(msmd, newToOldIV, oldToNewIV) ;
}
if ( oldToNewIV != NULL ) {
IV_writeToFile(oldToNewIV, outOldToNewIVfileName) ;
}
if ( newToOldIV != NULL ) {
IV_writeToFile(newToOldIV, outNewToOldIVfileName) ;
}
/*
----------------------------
free all the working storage
----------------------------
*/
Graph_free(g) ;
MSMD_free(msmd) ;
MSMDinfo_free(msmdinfo) ;
ETree_free(etree) ;
if ( newToOldIV != NULL ) {
IV_free(newToOldIV) ;
}
if ( oldToNewIV != NULL ) {
IV_free(oldToNewIV) ;
}
fprintf(msgFile, "\n") ;
fclose(msgFile) ;
return(1) ; }
/*--------------------------------------------------------------------*/
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