TEST_F(VertexWeightedGraphTest, testGetNode)
{
    Graph::Node *n;
    n = wmg->get_node(108);
    list<int> nbrs = n->get_nbrs();
    EXPECT_EQ(24, nbrs.size());
}
Example #2
0
void ORD::buildGraph() {
    Graph::GraphCreatorFile creator(this->filename);
    Graph::GraphUtil util;
    Graph::GraphProperties properties;
    
    int wr;
    int size;
    MPI_Comm_size(comm, &size);
    MPI_Comm_rank(comm, &wr);

    G = creator.create_weighted_mutable_graph();
    properties.make_canonical(G);
    char compname[512];
    if (!properties.is_connected(G))
    {
        Graph::GraphReaderWriterFactory factory;
        Graph::VertexWeightedGraph *H;

        // Since we are going to proceed with processing largest
        // component , set a mark as not original and write largest
        // component into a file.
        this->set_original(false);

        vector<list<int> *> members;
        int comp;
        comp = util.find_all_components(G, &members);

        DEBUG("found %d components\n", comp);
        int i = 0;
        int gsize = 0;
        int index = 0;
        for (int j = 0; j < comp; j++)
        {
            i = members[j]->size();
            if (i > gsize)
            {
                gsize = i;
                index = j;
                sprintf(compname, "%s_%d_comp", filename.c_str(), gsize);
                DEBUG("new larger comp : %d\n", gsize);
            }
        }

        this->set_filename(compname);
        H = creator.create_component(G, members[index], true);
        delete G;
        G = H;

        // Change the label into 1-base DIMACS format
        int j = 0;
        int gs = G->get_num_nodes();
        Graph::Node *n;
        for (int i = 0 ; i < gs; i++)
        {
            n = G->get_node(i);
            n->set_label(i+1);
        }

    }
}
Example #3
0
TEST_F(MutableGraphTest, testGetNode)
{
	Graph::Node *n;
	n = mg->get_node(108);
	list<int> nbrs = n->get_nbrs();
	EXPECT_EQ(24, nbrs.size());
}
void remove_all_edges(int i){
    list<int>::iterator it;
    Graph::Node *n = mg->get_node(i);
    list<int> nbrs = n->get_nbrs();
    for(it = nbrs.begin(); it != nbrs.end(); ++it){
        mg->remove_edge(i, *it);
    }
}
TEST_F(VertexWeightedGraphTest, testIsEdge)
{
    Graph::Node *n;
    n = wmg->get_node(108);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(24, nbrs.size());
    EXPECT_TRUE(wmg->is_edge(108, 100));
}
TEST_F(MutableGraphTest, testIsEdge)
{
    Graph::Node *n;
    n = mg->get_node(108);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(24, nbrs.size());
    EXPECT_TRUE(mg->is_edge(108, 100));
}
Example #7
0
bool
BasicBlock::dominatedBy(BasicBlock *that)
{
   Graph::Node *bn = &that->dom;
   Graph::Node *dn = &this->dom;

   while (dn && dn != bn)
      dn = dn->parent();

   return dn != NULL;
}
TEST_F(GraphPropertyTest, testClique)
{
    Graph::Node *n;
    n = mg->get_node(108);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(24, nbrs.size());
    EXPECT_FALSE(properties.is_clique(mg, &nbrs));
    nbrs.push_back(108);
    properties.make_clique(mg, &nbrs);
    EXPECT_TRUE(properties.is_clique(mg, &nbrs));
}
TEST_F(MetisGraphReaderTest, testGetNode)
{
    //dim_writer->write_graph(g);

    creator.set_file_name("data/1dc.128.met");
    creator.set_graph_type("Metis");
    g = creator.create_graph();

    Graph::Node *n;
    n = g->get_node(108);
    list<int> nbrs = n->get_nbrs();
    EXPECT_EQ(24, nbrs.size());
}
Example #10
0
TEST_F(DIMACSGraphWriterTest, testGetNode)
{
	dim_writer->write_graph(g);

	creator.set_file_name("../data/1dc.128.out");
	creator.set_graph_type("DIMACS");
	g = creator.create_graph();

	Graph::Node *n;
	n = g->get_node(108);
	list<int> nbrs = n->get_nbrs();
	EXPECT_EQ(24, nbrs.size());
}
TEST_F(GraphPropertyTest, testIsPath)
{
    Graph::Node *n = mg->get_node(20);
    list<int> nbrs = n->get_nbrs();

    EXPECT_GT(nbrs.size(), 0);
    EXPECT_TRUE(properties.is_path(mg, nbrs.front(), nbrs.back()));

    remove_all_edges(nbrs.front());

    EXPECT_FALSE(properties.is_path(mg, nbrs.front(), nbrs.back()));
    EXPECT_GT(mg->get_num_edges(), 0);
}
TEST_F(GraphReaderWriterFactoryTest, testDimacsGraphWriterGetNode)
{
	gw = factory.create_writer("dimacs", "data/dimacsout.out");
	gw->write_graph(g);

	creator.set_file_name("data/dimacsout.out");
	creator.set_graph_type("dimacs");
	g = creator.create_graph();
	Graph::Node *n;
	n = g->get_node(108);
	list<int> nbrs = n->get_nbrs();
	EXPECT_EQ(24, nbrs.size());
}
Example #13
0
TEST_F(GraphTest, testIsEdge)
{
    Graph::Node *n;
    n = g->get_node(108);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(24, nbrs.size());
    EXPECT_TRUE(g->is_edge(108, 100));

    n = g->get_node(80);
    list<int> nbrs2 = n->get_nbrs();
    EXPECT_EQ(22, nbrs2.size());
    EXPECT_FALSE(g->is_edge(80, 12));
}
Example #14
0
TEST_F(MetisGraphWriterTest, testIsEdge)
{
	dim_writer->write_graph(g);

	creator.set_file_name("../data/1dc.128.met");
	creator.set_graph_type("Metis");
	g = creator.create_graph();

	Graph::Node *n;
	n = g->get_node(108);
	list<int> nbrs = n->get_nbrs();

	EXPECT_EQ(24, nbrs.size());
	EXPECT_TRUE(g->is_edge(108, 100));

}
Example #15
0
 void LazyConstraintCallback::separateConnectedComponents( Graph          const & g
                                                         , GraphVariables const & vars
                                                         , Graph::Node    const & root
                                                         , NodeSetVector  const & nonZeroNodesComponents
                                                         , int                  & nCuts
                                                         ) {
   IloExpr rhs( getEnv() );

   for ( const NodeSet& S : nonZeroNodesComponents ) {
     // only consider the non-zero components that don't contain the root
     auto it = S.find( root );
     if ( it == S.end() || it->componentIndex() != root.componentIndex() ) {
       // determine dS
       NodeSet dS;
       for ( Graph::Node i : S ) {
         for ( Graph::Edge e : g.incEdges( i ) ) {
           Graph::Node j = g.oppositeNode( i, e );
           if ( S.find( j ) == S.end() )
           {
             dS.insert( j );
           }
         }
       }

       constructRHS( vars, dS, S, rhs );
       for ( Graph::Node i : S ) {
         assert( isValid( g, i, dS, S ) );
         add( vars.xVars[vars.nodeToIndex[i]] <= rhs, IloCplex::UseCutPurge ).end();
         ++nCuts;
       }
     }
   }

   rhs.end();
 }
Example #16
0
void ORD::outputMetisFormat() {
    int n = G->get_num_nodes();
    cout << n << " " << G->get_num_edges() << endl;
    for (int i = 0; i < n; i++)
    {
        Graph::Node *no = G->get_node(i);
        list<int> *l = no->get_nbrs_ptr();
        list<int>::iterator it = l->begin();

        for (; it != l->end(); ++it)
        {
            cout << (*it)+1 << " ";
        }        
        cout << endl;
    }
}
Example #17
0
TEST_F(MutableGraphTest, testEliminateVertex)
{
	EXPECT_TRUE(mg->is_edge(108, 100));
	EXPECT_EQ(1471, mg->get_num_edges());
	EXPECT_EQ(24, mg->get_degree(108));
	EXPECT_EQ(24, mg->get_degree(100));

	Graph::Node *na;
	na = mg->get_node(108);
	list<int> nbrs_a = na->get_nbrs();
	vector<int> nbrsvec_a(nbrs_a.begin(), nbrs_a.end());

	Graph::Node *nb;
	nb = mg->get_node(100);
	list<int> nbrs_b = nb->get_nbrs();
	vector<int> nbrsvec_b(nbrs_b.begin(), nbrs_b.end());

	int common_nbrs = 0;
	int final_degree = 0;
	int new_edges = 0;

	for (int ia = 0; ia < nbrsvec_a.size(); ia++)
	{
		for (int ib = 0; ib < nbrsvec_b.size(); ib++)
		{
			if (nbrsvec_a[ia] == nbrsvec_b[ib])
			{
				common_nbrs++;
			}
		}
	}

	new_edges = mg->get_degree(108) - common_nbrs - 1;
	new_edges = new_edges + mg->get_degree(100) - 1;


	mg->eliminate_vertex(108, NULL, true);

	EXPECT_FALSE(mg->is_edge(108, 100));
	EXPECT_FALSE(mg->is_edge(100, 108));
	EXPECT_EQ(1597, mg->get_num_edges());
	EXPECT_EQ(new_edges, mg->get_degree(100));
	EXPECT_EQ(0, mg->get_degree(108));
}
Example #18
0
/**
 * @brief Process the difference between 2 readers and return status.
 */
EImageStatus diffImageStatus(Graph::Node& read1, Graph::Node& read2, Graph::Node& stat, Graph& graph, const bfs::path& filename1, const bfs::path& filename2)
{
	if (bfs::exists(filename1) == 0 || bfs::exists(filename2) == 0)
		return eImageStatusNoFile;

	if (bfs::file_size(filename1) == 0 || bfs::file_size(filename2) == 0)
		return eImageStatusFileSizeError;

	try
	{
		// Setup parameters
		read1.getParam("filename").setValue(filename1.string());
		read2.getParam("filename").setValue(filename2.string());
		
		if( !verbose )
			std::cout.rdbuf(0);
		graph.compute(stat);
		std::cout.rdbuf(_stdCout);
		if( verbose )
		{
			std::cout << "diff = ";
			for (unsigned int i = 0; i < 3; ++i)
			{
				std::cout << stat.getParam("quality").getDoubleValueAtIndex(i) << "  ";
			}
			std::cout << std::endl;
		}

		for (unsigned int i = 0; i < 3; ++i)
		{
			if (stat.getParam("quality").getDoubleValueAtIndex(i) != 0.0 )
				return eImageStatusDiffNotNull;
		}
		//std::cout << stat << std::endl;

		return eImageStatusDiffNull;
	}
	catch (...)
	{
		std::cerr << boost::current_exception() << std::endl;
		std::cerr << boost::current_exception_diagnostic_information() << std::endl;
		return eImageStatusImageError;
	}
}
Example #19
0
TEST_F(MutableGraphTest, testContractEdge)
{
	EXPECT_TRUE(mg->is_edge(108, 100));
	EXPECT_EQ(1471, mg->get_num_edges());
	EXPECT_EQ(24, mg->get_degree(108));
	EXPECT_EQ(24, mg->get_degree(100));

	Graph::Node *na;
	na = mg->get_node(108);
	list<int> nbrs_a = na->get_nbrs();
	vector<int> nbrsvec_a(nbrs_a.begin(), nbrs_a.end());

	Graph::Node *nb;
	nb = mg->get_node(100);
	list<int> nbrs_b = nb->get_nbrs();
	vector<int> nbrsvec_b(nbrs_b.begin(), nbrs_b.end());

	int common_nbrs = 0;
	int final_degree = 0;
	int new_edges = 0;

	for (int ia = 0; ia < nbrsvec_a.size(); ia++)
	{
		for (int ib = 0; ib < nbrsvec_b.size(); ib++)
		{
			if (nbrsvec_a[ia] == nbrsvec_b[ib])
			{
				common_nbrs++;
			}
		}
	}

	final_degree = mg->get_degree(108) + mg->get_degree(100) - common_nbrs - 2;
	new_edges = mg->get_num_edges() - common_nbrs - 1;

	int x = mg->contract_edge(108, 100);

	EXPECT_FALSE(mg->is_edge(108, 100));
	EXPECT_FALSE(mg->is_edge(100, 108));
	EXPECT_EQ(0, mg->get_degree(100));
	EXPECT_EQ(new_edges, mg->get_num_edges());
	EXPECT_EQ(final_degree, mg->get_degree(108));
}
Example #20
0
TEST_F(DIMACSGraphWriterTest, testshuffle)
{
    string out_file("../data/1dc.128.out.shuf");
    dim_writer->set_out_file_name(out_file);
    dim_writer->shuffle(g, time(NULL));
	dim_writer->write_graph(g);

	creator.set_file_name("../data/1dc.128.out.shuf");
	creator.set_graph_type("DIMACS");
	g = creator.create_graph();

	Graph::Node *n;
	n = g->get_node(108);
	list<int> nbrs = n->get_nbrs();
	//BDS - problem if randomization happens to put a vertex of 
	//degree 24 in this location. Temporary fix.
	//EXPECT_NE(24, nbrs.size());
	EXPECT_NE(0, nbrs.size());
}
Example #21
0
void Graph::classifyDFS(Node *curr, int& seq)
{
   Graph::Edge *edge;
   Graph::Node *node;

   curr->visit(++seq);
   curr->tag = 1;

   for (edge = curr->out; edge; edge = edge->next[0]) {
      node = edge->target;
      if (edge->type == Edge::DUMMY)
         continue;

      if (node->getSequence() == 0) {
         edge->type = Edge::TREE;
         classifyDFS(node, seq);
      } else
      if (node->getSequence() > curr->getSequence()) {
         edge->type = Edge::FORWARD;
      } else {
         edge->type = node->tag ? Edge::BACK : Edge::CROSS;
      }
   }

   for (edge = curr->in; edge; edge = edge->next[1]) {
      node = edge->origin;
      if (edge->type == Edge::DUMMY)
         continue;

      if (node->getSequence() == 0) {
         edge->type = Edge::TREE;
         classifyDFS(node, seq);
      } else
      if (node->getSequence() > curr->getSequence()) {
         edge->type = Edge::FORWARD;
      } else {
         edge->type = node->tag ? Edge::BACK : Edge::CROSS;
      }
   }

   curr->tag = 0;
}
TEST_F(GraphPropertyTest, testIsIndependentSet)
{
    Graph::Node *n = mg->get_node(20);
    list<int> nbrs = n->get_nbrs();
    EXPECT_FALSE(properties.is_independent_set(mg, &nbrs));

    list<int>::iterator it;
    list<int>::iterator jt;
    for(it = nbrs.begin(); it != nbrs.end(); ++it){
        // Remove all edges between them
        for(jt = nbrs.begin(); jt != nbrs.end(); ++jt){
            if(*it != *jt){
                mg->remove_edge(*it, *jt);
            }
        }
    }

    EXPECT_TRUE(properties.is_independent_set(mg, &nbrs));
    EXPECT_GT(mg->get_num_edges(), 0);
}
TEST_F(GraphPropertyTest, testSimple)
{
    Graph::Node *n;
    n = mg->get_node(108);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(24, nbrs.size());
    EXPECT_TRUE(mg->is_edge(108, 100));

    EXPECT_EQ(24, mg->get_degree(108));
    mg->add_edge(108, 100);
    mg->add_edge(108, 108);

    EXPECT_EQ(1473, mg->get_num_edges());
    EXPECT_EQ(26, mg->get_degree(108));

    EXPECT_FALSE(properties.check_simple(mg));
    properties.make_simple(mg);
    EXPECT_TRUE(properties.check_simple(mg));
    EXPECT_EQ(24, mg->get_degree(108));
}
Example #24
0
TEST_F(GraphUtilTest, testRecomputeDegree)
{
    Graph::Node *n = mg->get_node(36);
    list<int> nbrs = n->get_nbrs();

    EXPECT_EQ(29, nbrs.size());
    EXPECT_FALSE(mg->is_edge(36, 3));

    mg->add_edge(36, 3);
    EXPECT_EQ(30, mg->get_degree(36));
    mg->remove_edge(36, 3);

    nbrs.push_back(3);
    n->set_nbr(nbrs);
    nbrs = n->get_nbrs();
    EXPECT_EQ(30, nbrs.size());
    EXPECT_EQ(29, mg->get_degree(36));

    util.recompute_degrees(mg);
    EXPECT_EQ(30, mg->get_degree(36));
}
Example #25
0
TEST_F(GraphTest, testFuseVertices)
{
    EXPECT_FALSE(g->is_edge(80, 12));
    EXPECT_EQ(1471, g->get_num_edges());
    EXPECT_EQ(22, g->get_degree(80));
    EXPECT_EQ(19, g->get_degree(12));

    Graph::Node *na;
    na = g->get_node(80);
    list<int> nbrs_a = na->get_nbrs();
    vector<int> nbrsvec_a(nbrs_a.begin(), nbrs_a.end());

    Graph::Node *nb;
    nb = g->get_node(12);
    list<int> nbrs_b = nb->get_nbrs();
    vector<int> nbrsvec_b(nbrs_b.begin(), nbrs_b.end());

    int common_nbrs = 0;
    int final_degree = 0;
    int new_edges = 0;

    for(int ia = 0; ia < nbrsvec_a.size(); ia++){
        for(int ib = 0; ib < nbrsvec_b.size(); ib++){
            if(nbrsvec_a[ia] == nbrsvec_b[ib]){
                common_nbrs++;
            }
        }
    }

    final_degree = g->get_degree(80) + g->get_degree(12) - common_nbrs;
    new_edges = g->get_num_edges() - common_nbrs;

    int x = g->fuse_vertices(80, 12, false);

    EXPECT_FALSE(g->is_edge(80, 12));
    EXPECT_FALSE(g->is_edge(12, 80));
    EXPECT_EQ(0, g->get_degree(12));
    EXPECT_EQ(new_edges, g->get_num_edges());
    EXPECT_EQ(final_degree, g->get_degree(80));
}
Example #26
0
/**
 * @brief Process difference between a reader and a generator.
 */
EImageStatus diffImageStatus(Graph::Node& read1, Graph::Node& read2, Graph::Node& stat, Graph& graph, const bfs::path& filename, const std::vector<std::string>& generatorOptions )
{
	if ( ! bfs::exists(filename))
		return eImageStatusNoFile;

	if ( bfs::file_size(filename) == 0 )
		return eImageStatusFileSizeError;

	try
	{
		// Setup parameters
		read1.getParam("filename").setValue(filename.string());
		for( size_t i=0; i<generatorOptions.size(); i++ )
		{
			std::vector<std::string> opt;
			boost::split(opt, generatorOptions.at(i), boost::is_any_of("="));
			int optvalue = atoi ( opt.at(1).c_str() );
			if( optvalue == 0 )
			{
				std::vector<std::string> optList;
				boost::split(optList, opt.at(1), boost::is_any_of(","));
				switch( optList.size() )
				{
					case 1 :
					{ // not a number, set a string parameter
						read2.getParam(opt.at(0)).setValue( opt.at(1) );
						break;
					}
					case 2 :
					{
						float opt0 = atof ( optList.at(0).c_str() );
						float opt1 = atof ( optList.at(1).c_str() );
						read2.getParam(opt.at(0)).setValue( opt0, opt1 );
						break;
					}
					case 3 :
					{
						float opt0 = atof ( optList.at(0).c_str() );
						float opt1 = atof ( optList.at(1).c_str() );
						float opt2 = atof ( optList.at(2).c_str() );
						read2.getParam(opt.at(0)).setValue( opt0, opt1, opt2 );
						break;
					}/*
					case 4 :
					{
						double opt0 = atof ( optList.at(0).c_str() );
						double opt1 = atof ( optList.at(1).c_str() );
						double opt2 = atof ( optList.at(2).c_str() );
						//double opt3 = atof ( optList.at(3).c_str() );
						read2.getParam(opt.at(0)).setValue( opt0, opt1, opt2 );
					}*/
					default :
					{
						for(size_t i=0; i<opt.size(); i++)
								TUTTLE_COUT_VAR(opt.at(i));
						TUTTLE_COUT("ERROR: unable to process " << optList.size() << " arguments");
						break;
					}
				}

				
			}
			else
			{
				read2.getParam(opt.at(0)).setValue( optvalue );
			}
		}

		if( !verbose )
			std::cout.rdbuf(0);
		graph.compute(stat);
		std::cout.rdbuf(_stdCout);

		if( verbose )
		{
			std::cout << "diff = ";
			for (unsigned int i = 0; i < 3; ++i)
			{
				std::cout << stat.getParam("quality").getDoubleValueAtIndex(i) << "  ";
			}
			std::cout << std::endl;
		}

		for (unsigned int i = 0; i < 3; ++i)
		{
			if (stat.getParam("quality").getDoubleValueAtIndex(i) != 0.0 )
				return eImageStatusDiffNotNull;
		}
		//std::cout << stat << std::endl;

		return eImageStatusDiffNull;
    }
	catch (...)
	{
		std::cerr << boost::current_exception() << std::endl;
		std::cerr << boost::current_exception_diagnostic_information() << std::endl;
		return eImageStatusImageError;
	}
}
Example #27
0
int ORD::find_elim_ordering() {
    int ws;
    int wr;

    char eoname[512];
    char eoname_other[512];

    // Get size and rank from the communicator
    MPI_Comm_size(comm, &ws);
    MPI_Comm_rank(comm, &wr);

    double xtime = MPI_Wtime();
    sprintf(eoname, "%s.order.%d", this->filename.c_str(), ws);
    sprintf(eoname_other, "%s.order_other.%d", this->filename.c_str(), ws);

    DEBUG("size: %d, rank %d \n", ws, wr);
    int n = G->get_num_nodes();
    int x = n/ws;
    int xm = n%ws;
    int i = 0;
    DEBUG("n: %d x: %d xm: %d \n", n, x, xm);

    vector<int> xadj;
    vector<int> adjncy;

    vector<int> vtxdist(ws + 1, 0);
    vector<int> sizes(2*ws,0);
    vector<int> ordering(x+1, 0);
    vector<int> recvcnt(ws, 0);
    vector<int> displ(ws, 0);

    int numflag = 0;




    int options[10];

    options[0] = 0;
    vtxdist[0] = 0;
    for (i = 1; i <= ws; i++)
    {
        vtxdist[i] = vtxdist[i - 1] + x;
        if (i <= xm)
            vtxdist[i]++;
    }

    // prepareing displacement and receive counts to use with MPI_Gatherv
    for (i = 0; i < ws; i++)
    {
        recvcnt[i] = x;
        if (i < xm)
            recvcnt[i] ++;

        if (i > 0)
            displ[i] += displ[i - 1] + recvcnt[i - 1];
    }

    DEBUG("range: %d, %d\n", vtxdist[wr], vtxdist[wr + 1]);
    int j = 0;
    xadj.push_back(0);
    for (i = vtxdist[wr]; i < vtxdist[wr + 1]; i++)
    {
        Graph::Node *no = G->get_node(i);
        list<int> *l = no->get_nbrs_ptr();
        list<int>::iterator it = l->begin();

        for (; it != l->end(); ++it)
        {
            adjncy.push_back(*it);
            j++;
        }
        xadj.push_back(j);
    }

    if (METIS_OK != ParMETIS_V3_NodeND(&vtxdist.front(), &xadj.front(), &adjncy.front(), &numflag, options, &ordering.front(), &sizes.front(), &comm))
    {
        FERROR("error occured while processing parmetis, aborting\n");
        MPI_Abort(MPI_COMM_WORLD, -1);
    }

    DEBUG("output from ParMETIS\n");
    double parmet_time = MPI_Wtime() - xtime;

    vector<int> recvbuf;
    n = G->get_num_nodes();
    if (wr == 0)
    {
        recvbuf = vector<int>(n, 0);
    }

    if (MPI_SUCCESS !=
        MPI_Gatherv((void *)&ordering.front(), recvcnt[wr], MPI_INT,
                    (void *)&recvbuf.front(), &recvcnt.front(), &displ.front(), MPI_INT,
                    0, comm))
    {
        FERROR("MPI error occured at Gatherv, Abort!\n");
        MPI_Abort(comm, -1);
    }

    vector<int> eo(n, 0);
    if (wr == 0)
    {
        for (int i = 0; i < n; i++)
        {
            eo[recvbuf[i]] = i;
        }

        FILE *f = fopen(eoname_other, "w");
        for (int i = 0; i < n; i++)
            fprintf(f, "%d\n", eo[i] + 1);
        fclose(f);
        DEBUG("ParMetis NodeND elimination ordering is in : %s\n", eoname_other);
    }

    ordering.clear();
    ordering.resize(recvcnt[wr], 0);

    if (MPI_SUCCESS !=
        MPI_Scatterv ((void *)&eo.front(), &recvcnt.front(), &displ.front(), MPI_INT,
                      (void *)&ordering.front(), recvcnt[wr], MPI_INT,
                      0, comm))
    {
        FERROR("MPI error occured at Scatterv, Abort! \n");
        MPI_Abort(comm, -1);
    }

    DEBUG("Scatterv completed\n");

    Graph::GraphCreatorFile gf;
    Graph::VertexWeightedGraph *wg;
    Graph::GraphEOUtil eoutil;
    Graph::GraphProperties prop;
    list<int>members(ordering.begin(), ordering.end());

    wg = gf.create_component(G, &members, false);
    prop.make_canonical(wg);

    vector<int> ord(recvcnt[wr], 0);
    vector<int> ordsend(recvcnt[wr, 0]);
    double xxtime = MPI_Wtime();
    eoutil.find_elimination_ordering(wg, &ord, GD_AMD, false);
    DEBUG("eo time : %f\n", MPI_Wtime() - xxtime);
    
    int sz = recvcnt[wr];

    for (int i = 0; i < sz; i++)
        ordsend[i] = wg->get_node(ord[i])->get_label();


    recvbuf.assign(n, -1);
    if (MPI_SUCCESS !=
        MPI_Gatherv((void *)&ordsend.front(), recvcnt[wr], MPI_INT, (void *)&recvbuf.front(), &recvcnt.front(), &displ.front(), MPI_INT, 0, comm))
    {
        FERROR("MPI error occured at Gatherv, Abort!\n");
        MPI_Abort(comm, -1);
    }

    double p_amd_time = MPI_Wtime() - xtime;
    if (wr == 0)
    {
        FILE *f = fopen(eoname, "w");
        for (int i = 0; i < n && wr == 0; i++)
            fprintf(f, "%d\n", recvbuf[i]);
        fclose(f);
    } 
    DEBUG("ordering is written into %s\n", eoname);
    DEBUG("%f,%f\n", parmet_time, p_amd_time);

    return 0;
}