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/* testOrderViaMMD.c */
#include "../misc.h"
#include "../../timings.h"
/*--------------------------------------------------------------------*/
int
main ( int argc, char *argv[] )
/*
----------------------------------------------------
order a graph via a multiple minimum degree ordering
created -- 97nov08, cca
----------------------------------------------------
*/
{
char *inGraphFileName, *outETreeFileName ;
double t1, t2 ;
ETree *frontETree ;
int maxsize, maxzeros, msglvl, nvtx, rc, seed ;
Graph *graph ;
FILE *msgFile ;
if ( argc != 8 ) {
fprintf(stdout,
"\n\n usage : %s msglvl msgFile GraphFile "
"\n maxsize maxzeros seed ETreeFile"
"\n msglvl -- message level"
"\n msgFile -- message file"
"\n GraphFile -- input graph file, must be *.graphf or *.graphb"
"\n maxzeros -- maximum # of zeros in a front"
"\n maxsize -- maximum # of internal columns in a front"
"\n seed -- random number seed"
"\n ETreeFile -- output ETree file, must be *.etreef or *.etreeb"
"\n",
argv[0]) ;
return(0) ;
}
msglvl = atoi(argv[1]) ;
if ( strcmp(argv[2], "stdout") == 0 ) {
msgFile = stdout ;
} else if ( (msgFile = fopen(argv[2], "a")) == NULL ) {
fprintf(stderr, "\n fatal error in %s"
"\n unable to open file %s\n",
argv[0], argv[2]) ;
return(-1) ;
}
inGraphFileName = argv[3] ;
maxsize = atoi(argv[4]) ;
maxzeros = atoi(argv[5]) ;
seed = atoi(argv[6]) ;
outETreeFileName = argv[7] ;
fprintf(msgFile,
"\n %s "
"\n msglvl -- %d"
"\n msgFile -- %s"
"\n GraphFile -- %s"
"\n maxsize -- %d"
"\n maxzeros -- %d"
"\n seed -- %d"
"\n ETreeFile -- %s"
"\n",
argv[0], msglvl, argv[2], inGraphFileName, maxsize,
maxzeros, seed, outETreeFileName) ;
fflush(msgFile) ;
/*
------------------------
read in the Graph object
------------------------
*/
graph = Graph_new() ;
if ( strcmp(inGraphFileName, "none") == 0 ) {
fprintf(msgFile, "\n no file to read from") ;
exit(0) ;
}
MARKTIME(t1) ;
rc = Graph_readFromFile(graph, inGraphFileName) ;
MARKTIME(t2) ;
fprintf(msgFile, "\n CPU %9.5f : read in graph from file %s",
t2 - t1, inGraphFileName) ;
nvtx = graph->nvtx ;
if ( rc != 1 ) {
fprintf(msgFile, "\n return value %d from Graph_readFromFile(%p,%s)",
rc, graph, inGraphFileName) ;
exit(-1) ;
}
if ( msglvl > 2 ) {
fprintf(msgFile, "\n\n after reading Graph object from file %s",
inGraphFileName) ;
Graph_writeForHumanEye(graph, msgFile) ;
fflush(msgFile) ;
}
/*
------------------------------------
order the graph using minimum degree
------------------------------------
*/
MARKTIME(t1) ;
frontETree = orderViaMMD(graph, seed, msglvl, msgFile) ;
MARKTIME(t2) ;
fprintf(msgFile, "\n\n CPU %9.2f : order the graph via MMD", t2 - t1) ;
if ( msglvl > 2 ) {
ETree_writeForHumanEye(frontETree, msgFile) ;
fflush(msgFile) ;
}
fprintf(msgFile,
"\n\n %d fronts, %d indices, %d entries, %.0f operations",
frontETree->nfront,
ETree_nFactorIndices(frontETree),
ETree_nFactorEntries(frontETree, SPOOLES_SYMMETRIC),
ETree_nFactorOps(frontETree, SPOOLES_REAL, SPOOLES_SYMMETRIC)) ;
/*
------------------
transform the tree
------------------
*/
MARKTIME(t1) ;
frontETree = ETree_transform(frontETree, graph->vwghts,
maxzeros, maxsize, seed);
MARKTIME(t2) ;
if ( msglvl > 1 ) {
fprintf(msgFile, "\n CPU %8.3f : transform tree", t2 - t1) ;
fflush(msgFile) ;
}
fprintf(msgFile,
"\n\n %d fronts, %d indices, %d entries, %.0f operations",
frontETree->nfront,
ETree_nFactorIndices(frontETree),
ETree_nFactorEntries(frontETree, SPOOLES_SYMMETRIC),
ETree_nFactorOps(frontETree, SPOOLES_REAL, SPOOLES_SYMMETRIC)) ;
/*
------------------------------------
optionally write the ETree to a file
------------------------------------
*/
if ( strcmp(outETreeFileName, "none") != 0 ) {
ETree_writeToFile(frontETree, outETreeFileName) ;
}
/*
------------------------
free the working storage
------------------------
*/
Graph_free(graph) ;
ETree_free(frontETree) ;
fprintf(msgFile, "\n") ;
fclose(msgFile) ;
return(1) ; }
/*--------------------------------------------------------------------*/
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